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Magnum Version 8 Manual Rev. 3.1

HVAC and CENT V8 Software

Summary of content (162 pages)

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Magnum Version 8 Manual Rev. 3.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The DB Commitment: Our commitment is to provide practical solutions for the industry’s needs and to be both a leader and partner in the effective use of microprocessor controls. All information contained within this document is considered to be proprietary information of Micro Control Systems, Inc.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 6.1.12. SCHEDULED OFF (10) ................................................................................................................................................ 23 6.1.13. OFF- NO FLOW (11) ..................................................................................................................................................... 23 6.1.14. AMBIENT OFF (13) ..............................................................................................
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MAGNUM VERSION 8 MANUAL REVISION 3.1 6.2.44. SCROLL STEP 3 (38) Only with HVAC Software ........................................................................................................ 31 6.2.45. SCROLL STEP 4 (39) Only with HVAC Software ........................................................................................................ 31 7. Standard Control Options ...............................................................................................................................
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.38. HOT GAS REHEAT (HUMIDITY) CONTROL .............................................................................................................................. 51 7.39. EXTRA LIQUID LINE SOLENOID CONTROL .............................................................................................................................. 53 7.40. OUTSIDE AIR ECONOMIZER/FLUID COOLER WITH ANALOG OUTPUT CONTROL................................................................
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.75.4. Status of Boiler Logic displayed by the Magnum .......................................................................................................... 90 7.75.5. Pump States ..................................................................................................................................................................... 92 7.75.6. Boiler States .................................................................................................
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MAGNUM VERSION 8 MANUAL REVISION 3.1 11.9. MCS COMPRESSOR CONTROL STATE CHART ....................................................................................................................... 130 11.10. MCS-MAGNUM TO BMS CONNECTIONS.......................................................................................................................... 131 11.11. MCS-MAGNUM BMS PROTOCOLS SETTINGS ........................................................................................................
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MAGNUM VERSION 8 MANUAL 2. REVISION 3.1 Revision Page Date Author 11-03-09 RCT 04-09-10 RCT 05-03-10 RCT 05-10-10 RCT 09-02-10 RCT 09-13-10 BWW 10-27-10 WLK 05-09-11 WLK 09-21-11 WLK 09-26-11 WLK WLK Description of Changes   Magnum Manual Rev 1.25 was used as the base for this manual Renamed file to Magnum Version 8 Manual Rev 1.0 to avoid confusion with existing manuals  Expanded all items regarding Magnum V8 software  Rev 1.
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MAGNUM VERSION 8 MANUAL 12-09-11 BWW 06-24-12 MAS 11-26-12 MAS 01-07-13 MAS 02-13-13 MAS 04-04-13 MAS                     REVISION 3.1 Rev 2.5 Corrected section 7.60 MDP EXV Logic Corrected section 13.2 Magnum Setpoints - Setpoint #205 “MDP MIN OIL DIFF” Rev 2.6 Updated section 13.2 Magnum Setpoints - Setpoint #99 “LLS#3 ON (ECONOMIZER)” Setpoint #84 “LO DISC SHEAT” Setpoint #4 “HGS TEMP ON” Setpoint #5 “HGS TEMP OFF” Setpoint #143 “UNLOADED %” Added section 7.7.6.4.
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MAGNUM VERSION 8 MANUAL 10-18-13 MAS       3. REVISION 3.1 Setpoint #35 “AMP DB LO” Setpoint #36 “AMP DB HI” Setpoint #125” Eco StageDly” Setpoint #143 “UNLOADED %” Updated 7.4.1. Screw Compressor with Slide Piston Updated 7.75. HVAC Defrost Cycle REV 3.1 Updated section 13.2 Magnum Setpoints - Setpoint #38 “UNLOAD PULSE” Setpoint #167 “PURGE FLT ERROR” Setpoint #168 “PURGE COUNT” Setpoint #170 “EXCESS PURGE” Setpoint #229 “CHK VALVE FLT” Setpoint #230 “MAX DIFF PSI ROC” Added 7.
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MAGNUM VERSION 8 MANUAL  MCS-SI16-AO4 REVISION 3.1 (16 SI and 4 AO) The versatility of the Magnum offers the user much flexibility in configuring the controls in an economical way. The limitation is not the number of boards but the total number of points. 3.3. About this Manual The purpose of this manual is to document MCS’s V8 software for the Magnum. This software requires a configuration type 11 in MCS-Config.
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MAGNUM VERSION 8 MANUAL 3.7. REVISION 3.
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MAGNUM VERSION 8 MANUAL 3.8. REVISION 3.
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MAGNUM VERSION 8 MANUAL 3.9. REVISION 3.1 PC Support Software for Magnum MCS-Config provides the configuration file (.cfg), which includes the input/output points list, Setpoints, circuit information, etc., for all versions of software. This program is designed to assist and make the task of building the configuration file as simple as possible. A manual created in a PDF format is available on our web site: www.MCScontrols.com, or available in other formats upon request.
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MAGNUM VERSION 8 MANUAL 4. REVISION 3.1 Magnum Display Summary The following is an examination of all the information screens that can be accessed through both the Magnum keypad and MCS-Connect program. 4.1. Magnum keypad and display 4.1.1. Menu Screen The main menu is accessed by pressing the “Menu” key.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 4.1.5. Purge Status Screen (only if Purge cycles are active) ACTUAL DISPLAY DESCRIPTION 09:55 PRG 1 45/54 A‐PRG OFF 000:00:42 MODE COOL SUC‐LT FLOAT 24TMR 20F NORMAL 27mi PG PG HH:MM Purge Circuit LEV/ENT TMP CURRENT PURGE STATE TIME IN CURRENT STATE UNIT MODE SUC‐LT FLOAT 24 TMR Temperature of Safety Float Purge Run Time suction line Status in last 24 hours PAGE UP PAGE DOWN 4.1.6.
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MAGNUM VERSION 8 MANUAL 4.2. REVISION 3.1 HVAC STATUS Display (MCS-Connect) Function Buttons Sensor Inputs Unit Tabs Relay Outputs Analog Outputs Unit Status The screenshot above shows the following features:  The top row of buttons provides function selection within MCS-Connect.  The authorization level button is located in this row; it will automatically update to display the current authorization level. The example above is at a factory level authorization.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 System (unit) information is shown in the top section:  Capacity Control State - State of chiller  Time - Time spent in current state. If the state is UNIT IN POWER UP time will count down to zero.  Wanted / Actual - Number of capacity steps Wanted On versus Actual On.  Step Delay – Value that is counted down. The sensitivity and difference between the control sensor and control zone will determine the speed of the countdown.
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MAGNUM VERSION 8 MANUAL 4.3. REVISION 3.1 CENT Status Display (MCS-Connect) The Control Status for centrifugal compressor portion of the Status screen is shown below. Centrifugal (unit) information is shown in the top section:  Capacity Control State - State of chiller  Time - Time spent in current state. If the state is UNIT IN POWER UP time will count down to zero.  Wanted / Actual - Number of capacity steps Wanted On versus Actual On.  Step Delay – Value that is counted down.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Compressor information (all active compressors will be displayed):  State - Compressor number and state. The default Compressor number can be changed in MCS-Config with a 3 character entry in the “Comp Name/ID” column of the Circuit Base screen.  Time - Time spent in current state. If the state is CMP ANTICYCLE time will count down to zero.  Oil Diff - Oil differential pressure.
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MAGNUM VERSION 8 MANUAL 5. REVISION 3.1 Authorization Function The authorization code is a special four-character code that enables access to the Magnum controller. The code may consist of any valid alpha/numeric characters if the system is being accessed through MCS-Connect, however, the code must be numeric with values between 1 and 8 if it is to be entered through the Keypad/Display.
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MAGNUM VERSION 8 MANUAL 6. REVISION 3.1 Magnum Control States The Magnum controller is a state computer, that is, decisions are made based upon Setpoints, timers and Sensor Inputs, the controller moves from one state to another. The controller will change states to ensure the proper functioning of the chiller package.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 2) Control sensor reading is above the control zone but the Rate of Change is less than the value in the (MAX ROC-, #27) Setpoint. This indicates that the temperature is decreasing toward the target at an acceptable speed. Therefore, no additional cooling is needed at this time. 3) The temperature is below the control zone but the Rate of Change is greater than the (MAX ROC+, #28) Setpoint. This indicates that the temperature is increasing toward the target.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 STEP will be moved per second. If the NO FLOW Setpoint is active and set to Lockout the chiller will lockout on no flow. 6.1.14. AMBIENT OFF (13) This state is entered when the ambient temperature falls below Setpoint #24 “LOW AMB OFF” or is above Setpoint #26 “HIGH AMB OFF”. The system will remain in this state until the ambient temperature if low rises 5.0°F (2.5°C) above the “LOW AMB OFF” Setpoint value or if high drops 5.0°F (2.
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MAGNUM VERSION 8 MANUAL 6.1.21. REVISION 3.1 UNIT SMOKE UNLDG (20) This state is entered when the system is unloading because a smoke alarm sensor has tripped. When this sensor is on, an error message “OFF-SMOKE ALARM” is generated and the unit state is changed. See section 6.1.10. 6.1.22. UNIT OFF UNLDING (21) This state is entered when the unit has been disabled. It will force a quick unload of the system. 6.1.23.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 the suction pressure reaches Setpoint #61 “PMP DWN OFF” or the time has exceeded Setpoint #62 “PMP DWN DELY”. The compressor will then move to the CMP ANTICYCE state. 6.2.5. CMP ANTICYCE (4) This state is entered when the UNLD and PMPDWN state has been completed. The compressor will stay in this state with all compressor points off for the period of time contained in Setpoint #59 “ACYC OFF-> ON” or Setpoint #63 “ACYC ON -> ON”, whichever is longer.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 If a variable step compressor, then the percentage wanted on will be checked. If it is less than Setpoint #31 “MIN SLIDE %”, or option “Use Min FLA” has been selected, the percentage wanted will be set to the value in Setpoint #31 “MIN SLIDE %” and the state will be set to HOLDING. Any associated EXV will be adjusted to allow for additional capacity.
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MAGNUM VERSION 8 MANUAL 6.2.19. REVISION 3.1 CMP IS RUNNING (14) For fixed capacity compressors only, this state occurs when the compressor is fully loaded. In this state, the compressor is providing the maximum amount of cooling capacity. 6.2.20. FAST UNLOADING (15) For screw compressors only, this state is entered when the compressor is turned on. All load solenoids will be turned off and all unload solenoids will be turned on to ensure the screw is fully unloaded.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Variable Step Compressors - Capacity is being held due to high discharge temperature or pressure. Once the discharge returns to normal operating levels the compressor will return to its normal running state. 6.2.25. SAFETY TRIPPED (20) This state is entered when a safety trip occurs but a lockout is not generated. An alarm is generated but the system will automatically restart after the delay specified in the corresponding Setpoint.
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MAGNUM VERSION 8 MANUAL 6.2.33. REVISION 3.1 HI WATER HOLD (27) When the compressor is running and Setpoint #86 “HI RETURN TEMP” is active, the Magnum will check for high water temperature. If the control temperature is greater than Setpoint #86 for the time specified the Magnum will place the compressor in this state. The system will be unable to load when in this state. 6.2.34. EXTRA 70% STEP (28) Only HVAC Software For Mitsubishi Screw compressors only.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 If Trane Trio then COMP C is on and COMP A and B are off. If Trane Quad then COMP A is on and COMP B, C, and D are off. 6.2.43. SCROLL STEP 2 (37) Only with HVAC Software Only used with special patterns for Trane Trio and Quad compressors. These compressors provide special staging as follows: If Trane Trio then COMP A and B are on and COMP C is off. If Trane Quad then COMP C and D are on and COMP A and B are off. 6.2.44.
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MAGNUM VERSION 8 MANUAL Standard Control Options The following options are specified in MCS-Config when building the configuration. These options are used to customize the system to meet the individual control requirements. 7.1.             7.2. General Options Control method can be based upon the control zone or a voltage input indicating the number of stages to be on. The control temperature sensor can be either the returning or leaving sensor.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 changing, its direction, and its distance from the control zone will all be used to determine how the Magnum will respond. 7.2.1.5. Step Delay and Sensitivity The Magnum will not attempt to take action until the Step Delay counts down to zero. Setpoint #26 contains the initial value. The speed that the counter will decrement by is based on the control input rate of change and the sensitivity that has been specified in Setpoint #25.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.4.2. Compressor with a Variable Frequency Drive (VFD) This option is specified in MCS-Config by selecting the Analog Output for the VFD in the “Compr Speed or Modulate Hot Gas AO” cell in the Circuit Base screen. The Magnum will control the compressor speed in the same matter as the compressor slide. The same Setpoints will be used. This allows a fixed staged compressor’s capacity to be varied.
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MAGNUM VERSION 8 MANUAL REVISION 3.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.6.3. Circuit Base setup Compressor information is provided per circuit in this section under the Circuit Base screen. Review all cells and input the proper information about the compressor. 7.6.4. Relay Output Information Screen setup This screen relates to the above example. The compressor is a variable capacity compressor; therefore, the slide information must be provided, this is used in calculating the amp draw of the compressor.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 This screen is an example of a variable capacity, screw, and compressor with EXV valves. Note the Type column selection. The EXV data must be provided. This information can be viewed and changed, with proper authorization, from MCS Connect. By double clicking on the name field the following will be displayed. 7.7. Centrifugal Compressor Control There are many differences, in both concept and function, between centrifugal compressors and other types.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The CENT V8 software will keep the last 60 seconds of samples for both amps and lift pressure. It will calculate the last ten 1 second Rate of Changes for both amps and lift pressure. If within these 10 Rate Of Changes there is a value less than (Setpoint #220 “AmpSurgeROC” x –1) or (Setpoint #221 “LiftSurgeROC” x –1) followed by a value greater than Setpoint #220 or #221, a compressor surge has occurred.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.7.4. Compressor Speed Control Compressor speed is controlled by the associated Analog Output. The speed will only be changed after the vanes are either completely opened (speed will be increased) or closed (speed will be decreased). 7.7.5. Compressor Vane Control If more capacity is needed the vanes will be opened by pulsing the Open Vane Relay Output (refer to UNIT LOADNG-VANE state).
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Purge Safety Switch SI - If this switch is on for longer than the value in Setpoint #164 “P-FaultTimer” all purge Relay Outputs will be locked off and an error message will be generated. This will have no effect on the status of the unit. Purge Suction Temp SI – This sensor provides the suction line temperature of the auxiliary unit. When a purge cycle is active this temperature is monitored.
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MAGNUM VERSION 8 MANUAL 7.8. REVISION 3.1 Special Pattern for Scroll Compressors Special patterns have been developed for Trane Scroll 3-D compressors. HVAC 7.00 software and newer is required for this function. These patterns are for either a 3 or 4 scroll unit. They are specified by selecting either the Trane Trio or Trane Quad package in the Compressor Type selection under the MAG V8 screen. The sequencing will provide proper oil control for the Trane compressors.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 # of Compressors and # of steps: Set up compressor: Set up Relay Outputs: 7.8.4. Pattern of the three-compressor setup: Staging sequence Stage 1 Stage 2 Stage 3 COMP A OFF ON ON COMP B OFF ON ON COMP C ON OFF ON 7.8.5. Safeties are the same for both compressor types The standard unloading and holding logic has been incorporated with their compressor state names. When a step is unloaded it will go to the previous step pattern.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Setpoint can be manually changed to force a different compressor as the lead compressor or to enable auto rotation. When this option is enabled, the Magnum will rotate the compressors based upon the value in Setpoint # 104 “CMP ROTATION” If Setpoint # 104 is zero, rotation will occur with every complete capacity cycle and the next compressor will be selected as the lead compressor. If Setpoint # 104 is nonzero, the value is the number of days between rotations.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.11. Compressor Anti-Cycle Logic When a compressor is to be turned off, the Magnum software will make a calculation to determine the amount of time that the compressor will remain in an anti-cycle state. This calculation is based upon how long the compressor has been on and Setpoints #59 “ACYC OFF->ON” and #63 “ACYC ON->ON”.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.15. Hot Gas Bypass Control of the Hot Gas Bypass function will depend on which Setpoints are made active/inactive. Refer to section 13 Setpoints #4-#7.  Setpoints #4-#7 INACTIVE - If Setpoints #4-#7 are all inactive, then the HGB is enabled when the machine is unloaded to within 25% of the minimum slide percentage. The HGB is disabled when the machine rises above 30% of the minimum slide percentage.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 available options, it may not necessarily follow the first stage relay. Refer to section 12 for Relay Output order and options. The first stage will be turned on if either the discharge temperature is greater than Setpoint #8 or suction pressure is less than Setpoint #80 plus 5 psi (.5 Bar). If 2 Stage, the second relay will be turned on if the discharge temperature is greater than Setpoint #8 plus 5.0° F (2.
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MAGNUM VERSION 8 MANUAL   REVISION 3.1 Network Run/Stop – If OFF the system will not run. This input is provided by another system on the network. It functions in the same matter as the Run/Stop switch. Emergency Stop – If ON the system will be shut down immediately and will remain disabled until the switch is OFF. 7.23. Low Suction Unloading and Holding This option is activated when Setpoint #78 “LO SUCT UNLD” is active.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 to be unloaded or if the discharge temperature has returned to normal after the time in Setpoint #101 “SAFETY HOLD DELAY” has passed.  For variable step compressors: The Magnum will begin unloading the compressor(s) with high discharge temperature until the temperature drops below the calculated value. During this time the circuit state is HI DISC UNLOAD. Once this temperature has been reached, the circuit state will be HI DISC HOLD.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 If running compressors at 100% is not desired, then the “Last Stage to 100% (Override Setpoint)” cell in the Compressor Information panel of the MAG V8 screen should be set to ‘No’. Then the maximum capacity allowed will be the value in Setpoint #30. If ‘Yes’, then all compressors will load to the value in Setpoint #30 until all compressors are on, then they will load to 100% together. 7.29.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.31. Control Power Relay (No Stop) This feature provides the capability to interrupt the power supply to the system when a particular compressor continues to draw a specified amperage level when it is called to be OFF. A Relay Output, referred to as the control relay, must be wired so that no power reaches the compressors when it is switched OFF.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.35. Vi Port Control Logic (Open Drive Screw only) The internal volume (Vi) of the open drive screw can be dynamically adjusted to achieve maximum efficiency modulating the Vi control solenoids. The duration of each solenoid pulse is contained in Setpoint #114 “Vi PULSE”. The ratio of discharge pressure divided by suction pressure is calculated. This ratio is blocked between 50 and 22.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 When this option is selected the Reheat Relay Outputs must be setup as follows: These Hot Gas Reheat relays are required and they must be placed in the proper sequence to work correctly. The following Setpoints must be active: #129 “RH CUTIN”, #130 “RH CUTOUT ADJ”, #131 “RH START DLY”, #132 “RH BLEED DLY”, #133 “RH STAGE DLY”.(see Section 13 for full Setpoint descriptions).
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.39. Extra Liquid Line Solenoid Control Second and third Liquid Line Solenoids (economizers) are supported and can be used for extra control. To specify, select the Circuit Base Screen: The third solenoid (economizer) can be controlled either on the slide wanted percentage or as the last step on for that compressor (Refer to section 13 Setpoints #98 and #99). Liquid line solenoids 2 and 3 will be turned on and off as indicated in their Setpoints. 7.40.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 example if the target is 45.0F and Setpoint #119 is 10.0F, then the ambient temperature must be less than 35.0F to enable the economizer function to begin. If mechanical cooling has not been enabled (no steps are Wanted On or Actual On), when the economizer starts the Unit State will be ECONOMIZER ONLY.
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MAGNUM VERSION 8 MANUAL REVISION 3.1  If during mechanical cooling mode the ambient temperature drops below the offset in Setpoint #119, then the economizer function will begin. Note: the Unit State will not change, the economizer valve will be modulated as described above, fans directly associated with the economizer will be used, and no fans associated with the condensers will used.  The control rate of change is always checked before an adjustment to the valve is made.
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MAGNUM VERSION 8 MANUAL 119 120 121 122 123 124 125 126 127 EcoOffsetON EconDelyFans EcoVlvMinVlv EcoVlvMaxVlv EcoVlvMaxAdj EcoVlvDelay EcoVlvMaxDly EcoVlv Mul EcoVlv Div REVISION 3.1 10.0F 60s 0.0% 100.0% 5.0% 30s 120s 3 2 Conditions when the run/stop was set to RUN Ambient temperature 30.0F Control temperature 48.5F The ambient temperature is less than 44.0 (Setpoint #1) – 10.
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MAGNUM VERSION 8 MANUAL 7.40.6. REVISION 3.1 Example: Fluid Cooler with condenser compressor fans The economizer AO has been selected and there are no separate economizer fans. The condenser type is RO Step Individual and the Fluid Cooler Economizer option has been enabled. The individual compressor condenser fans will be controlled by the economizer function unless a compressor is running.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 (Setpoint #123) to 10.0%. The economizer valve opening will be increased by this amount if the temperature control rate of change is greater than the value of Setpoint #27. With Setpoint #126 equal to 2 and #127 equal to 1, the valve will be adjusted by 2% for every degree difference from the target. The economizer function will wait 30 seconds (Setpoint #124) before calculating the next adjustment. If the control temperature is now 47.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 that compressor. Make Setpoint #155 active with the low temperature value that will trigger the safety and unload action and you have a low saturated suction temperature condition. 7.43. Electronic Expansion Valve Control Logic (EXV) The EXV is set up in MCS-Config as follows: By clicking on the ‘EXV Control’ cell under the Circuit Base screen, the option will cycle between Suction Superheat, Discharge Superheat, and Refrigerant Level control.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The following charts show the control logic for the EXV’s with superheat control option.
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MAGNUM VERSION 8 MANUAL REVISION 3.
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MAGNUM VERSION 8 MANUAL REVISION 3.
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MAGNUM VERSION 8 MANUAL 7.43.1. REVISION 3.1 EXV Related Setpoints. (Refer to section 13 Setpoints 9-20, 65-72, 109-110, 199-201, 205, 215, 217, and 230) These Setpoints were added to provide fine-tuning to the testing of the movement of the superheat temperature. Refer to EXV control logic chart in a previous section. 7.43.2. EXV Control States The EXV Control States show the status of the compressor’s expansion valve. If the compressor has an EXV it will be displayed under the Status entry.
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MAGNUM VERSION 8 MANUAL 7.43.3. REVISION 3.1 EXV Maximum Operating Pressure Setpoint #199 “MOP TARG PSI” must be active if the suction pressure is to be checked for maximum operating pressure. If the suction pressure is above the MOP control zone, then the EXV state will be changed to EXV IS MOP CLS. The EXV valve opening will be closed by the value in Setpoint #201 with each adjustment. The ‘Time(sec)’ field of Setpoint #201 will be the delay between making adjustments to the EXV valves.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 In the Compressor SI screen the active compressors information is to be completed as normal, while only the Suction Pressure and Suction Temperature must be entered for the tandem EXV. The different suction temperature provides separate control for the tandem EXV. 7.43.4.2.
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MAGNUM VERSION 8 MANUAL 7.43.5. REVISION 3.1 Refrigerant Level Control There is an alternate method to control the EXV based on Ref Level 7.43.5.1. Minimum Refrigerant Level target (HVAC ONLY) If active and the EXV is controlled by Refrigerant Level, then a new variable level target logic will be activated.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 50% × 35% = 17.5% Current EXV position (35%) + EXV adjustment (17.5%) = New EXV position (42.5%) 35% +17.5% = 42.5% Therefore the final EXV valve position would be 42.5% This same calculation will be repeated every time a new stage of capacity is turned on. Conversely, when the unit is unloading, the EXV adjustment will be subtracted from the current EXV position for every step that turns off.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.46. Motor Amps (08.00-R) Up to three sensors that measure amperage input can be specified per circuit. If used a safety condition based upon Setpoints #75 HI AMPS and #76 LO AMPS, plus the associated Full Load Amps (FLA) for that circuit will be checked. If a safety trip occurs, that circuit will be placed in a safety hold state. 7.47. Custom display description of circuit (08.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.57. External Centrifugal Purge Control (08.01-P) Support for the Trane Purifier Purge operation has been added. If Setpoint #163 Purge Target is active, it will activate this feature. 7.58. MCS Touch Screens Interface (08.00-U) The interface with the various touch screens has been expanded. 7.59. Sensor Averaging (08.00-R) Sensor inputs can now be averaged over a period of time, up to a maximum time of 30 seconds. This will enable sensor smoothing if it is needed.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.63. Normal Condenser Discharge Control Bypass (8.02-A) Depending on what option was selected in MCS-Config, normal condenser control can either be based upon the compressor with the highest discharge pressure or on the pressure of the most recently started compressor. If control based on newly started compressor was selected then Setpoint #206 may be used to bypass this logic because of a high ambient temperature. (Refer to section 13 Setpoint #206) 7.64.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.71. Tonnage and KW Information (8.03-F) 7.71.1. KW Sensors Unit KW – virtual sensor that calculates the unit Kilowatt usage. The Power Factor (PF) sensor must be selected in the ‘Temp. / GPM / CFM / Pwr Factor SI’ cell. Kw = Amps * Volts * Power Factor * Internal Constant of .00173 Power Factor – Virtual sensor tied to a Setpoint where a manual value of the unit’s power factor may be defined. If not specified, a hardcoded value of .85 will be used.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Supply and Return Temperatures – (Air only) Temperature sensors for Return and Supply air. Return Enthalpy – (Air only) Virtual sensor that calculates enthalpy for Return air. The Return Temperature sensor must be selected in the ‘Temp. / GPM / CFM / Pwr Factor SI’ cell and the Return Humidity sensor must be selected in the ‘Humd. SI / Temp. Diff. / Enthal. Diff.’ cell. Supply Enthalpy – (Air only) Virtual sensor that calculates enthalpy for Supply air.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The Unit Tons value is selected in the “Evap. Tonnage” cell in the Evaporator Information panel under the MAG V8 screen. The Unit Volts sensor is selected in the “Volts A” cell in the General Information panel. The Unit Amps sensor is selected in the “Unit Amps” cell (If not used then the “Amps A” cell from each circuit in the Circuit SI screen will be totaled together to calculate the amps value). The Unit KW sensor is selected in the “Unit KW” cell.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The following screen has been added to the status screens in the keypad display to show Tonnage/KW information (if available): ACTUAL DISPLAY 09:55 AMP&VLT 110.0A 388.0V Unit 60/65 UNIT IS UNLOADED 025:42;33 KW&TON KW/TON 73.8K 0.15 479T PG PG DESCRIPTION HH:MM AMP and VOLT AMPS VOLTAGE CHILLER UNIT LEV/ENT CURRENT CONTROL STATE TIME IN CURRENT STATE KW and TON KW/TON KW KW/TON with TONS 2 decimals PAGE UP PAGE DN 7.72. Oil Flow Safety (8.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The Magnum supports the following options:  No Condenser - No condenser specified.  RO Step Common - The highest discharge pressure from any compressor on the system will be the controlling pressure.  RO Step Individual - Each compressor will have one or more condenser Relay Outputs associated with it. The discharge pressure on that compressor will be the control pressure for its own condenser.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Note 2: Condenser staging is critical if the Magnum is to function in different climates. The best option for air-cooled chillers is to have each fan on its own contactor and a frequency drive on fan 1. This configuration allows the most optimum control in all weather. 7.74.1. RO Step Condenser Cut In – Out Logic The Cut In and Cut Out Logic Setpoints are as follows: Setpoint #45 “CND STG1 ON” - Condenser stage 1 Cut In (ON).
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Specifies if the Fluid Cooler Economizer (if used) can use the condenser fans or VFD. Control Condenser On: (Disc PSI) - The Magnum will check for the compressor with the highest discharge and use that as the controlling pressure. (Other SI) - The Magnum will not check for the compressor with the highest discharge pressure but will always use the value of the sensor that is selected as the control. 7.74.3.2.
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MAGNUM VERSION 8 MANUAL CND START % (Modulating Type) 50 CND TRGT (Modulating Type) LO AMB SUMP OFF (RO Type) 51 CND ADJ DIV (Modulating Type) CND VFD MIN 52 CND MIN % (Modulating Type) 53 CND ROC(Modulating Type) 54 57 CND MIN SPD (RO Type) CND ADJ MULT (Modulating Type) CND MAX SPD (RO Type) CND MIN ADJ (Modulating Type) LO AMB PROC 90 COND FAULT 193 CND HI/LO ZONE 194 CND 2ND ZONE 197 COND LOW AMB (Only CENT) 55 REVISION 3.
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MAGNUM VERSION 8 MANUAL 204 COND LOW AMB (Only HVAC) 206 COND HI AMB REVISION 3.1 Standard condenser logic dictates that a newly started compressor will use its own discharge pressure as the control for the first five minutes. If this Setpoint is active and the ambient temperature sensor is reading less than the value of this Setpoint, then this compressor’s discharge pressure will remain in control for the additional time in seconds as specified in the ‘Time (sec)’ field.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.74.3.6. RO Step Common with a Fan AO and Condenser Faults The above example is the same as the previous example with the addition of a Fan AO and two condenser faults. Fan AO Control (same for all types of air condenser control) Two more Setpoints than the previous example are needed to control the speed of the fan: Setpoint # Name Value 54 CND MIN SPD 20.0% 55 CND MAX SPD 100.0% CND FAN 1 will be turned on when the control pressure is equal to or greater than 200.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 # of Cond ROs –Total number of Relay Outputs of each compressor, in this example there are 3. The number of fans in each compressor does not have to be the same. Starting Condenser RO – The starting condenser Relay Output. All the Relay Outputs specified for each circuit must follow consecutively to this point. In this example CND FAN 1 is the starting Relay Output for circuit 1 and the other 2 fans follow consecutively in the RO screen.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.74.3.9. Modulating 7.74.3.9.1. Modulating Common This type of condenser uses water for condenser cooling. The AO Modulating Valve will modulate the cold water valve based upon the system’s highest discharge pressure.
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MAGNUM VERSION 8 MANUAL 193 CND HI/LO ZONE 194 CND 2ND ZONE REVISION 3.1 For Common VFD Fan Condensers with Bypass: Time in seconds before the bypass can be used when a fault has occurred. The value in this Setpoint is the high and low zone for your target of Setpoint #50 “CND TRGT“. If inactive then a default zone of 5 psi will be used, if metric .3 Bar. The value in this Setpoint is the 2nd high and low zone for your target of Setpoint #50 “CND TRGT“.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.74.3.9.2. Modulating Step Common When a RO is being used with an AO the AO will key off the RO turning on. The RO will turn on when the discharge pressure enters the bottom of the CND HI/LO ZONE (Setpoint #193). At that time the AO will move to its starting % (Setpoint #49). The AO will stay at its starting % until the discharge pressure gets outside the top of the CND HI/LO ZONE (Setpoint #193). At that point the AO will modulate based on Setpoints #51, #53-55.
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MAGNUM VERSION 8 MANUAL 7.74.3.10. REVISION 3.1 RO Shared The RO Shared condenser has banks of fans that are shared between two consecutive circuits. The number and location of the fans are specified under the Circuit Base screen. This is similar to the RO Step Individual set up. Circuits 1 and 2 will share the fan bank that is specified in the circuit 1 grid in the Circuit Base screen. The highest discharge pressure of these two compressors will be used to control this bank of fans.
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MAGNUM VERSION 8 MANUAL 7.74.3.12. REVISION 3.1 Common VFD Fan w/Bypass The Common VFD Fan with a Bypass type of condenser has one fan. All circuits will use this fan; make sure that all circuits in the Circuit Base point to the same common fan bank. The above setup shows that there is one condenser stage. However this type requires the following three consecutive Relay Outputs to be set up. For example: This type of condenser requires one condenser fault.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 When the discharge control pressure is greater than 250 psi the relay VFD ENABLE will be on and the VFD on the fan will be set to 100%. If the discharge control pressure drops to 210, then the fan speed will be set to 60%. The discharge control pressure is half of its Cut In and Cut Out range (250 – 170 = 80 / 2 = 40= 170 = 210) therefore, the VFD will be positioned to half of its range (100 –20 = 80 / 2 = 40 + 20 = 60).
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Always On - If the unit is on then a pump will be on. Cycled On Temp - Pumps will be cycled on and off based temperature of the water. # of Pumps: Indicates the number of pumps that will be controlled (Maximum of 12). Max Pumps Allowed: Indicates the maximum number of pumps that can be turned on concurrently. Starting Pump RO: Select the starting pump Relay Output from a dropdown list. There must be one Relay Output for each pump.
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MAGNUM VERSION 8 MANUAL # 159 Name B-VFD DELAY REVISION 3.1 Typical Value 30 500 1000 160 B-VFD TARGET 60.0 120 30 25 30 161 B-PUMP FLT 0 30 162 163 164 NO USED B-HEAT TRGT B-HEAT ZONE+ 180.0 3.0 165 B-HEAT ZONE- 3.0 189 B-FLA PUMP 30.0 190 B-FLA BOILER 120.0 Description The time delay expressed as seconds between making decisions as to pump VFD setting. ‘Sec. to Ignore Safety’ field: contains the minimum valve setting.
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MAGNUM VERSION 8 MANUAL 7.75.3. REVISION 3.1 Status of Boiler Logic displayed by MCS Connect The Boiler status is displayed by clicking on the Boiler tab: Pump General Status:        Pump Capacity State: Pump state. Time: Time in current pump state. Step Delay: Seconds remaining before next pump adjustment is checked. Rate of Change: Rate of change of the controlling sensor. In above example the control on water in has been selected, sensor CTLT-IN.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Screen 1 Screen 2 If there are more than 4 pumps addition screens will be displayed showing up to the maximum of 12 pumps. The status of 4 pumps will be displayed per screen.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 If there are more than 4 boiler stages addition screens will be displayed showing up to the maximum of 12 boiler stages. The status of 4 boiler stages will be displayed per screen. 7.75.5. Pump States The general pump states are as follows:       PUMPS STOPPED: The Run/Stop Switch is in the STOP (OFF) position. PUMPS ALL OFF: The Run/Stop Switch is in the RUN (ON) position but no pumps are required at this time.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.76. HVAC Defrost Cycle All types of compressors that are heat pumps will now support with the defrost function. The following must be set up in MCS-Config to activate a defrost cycle:  In the General Information panel under the MAG V8 screen, the Unit Type must be set to heat pump.  In the Evaporator Information panel the Type of Defrost must not be ‘NONE’.  Either or both Condenser Coil Temperature #1 or #2 must be set up in the Circuit Base screen.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The action and termination in the “DEF PUMP DOWN” state is the same as “DEF PREPMP OUT”. When this state is terminated a variable step compressor will have its state changed to “HOLD”. A fixed step compressor’s state will return to its state prior to the defrost cycle and the LLS will be turned on. 7.77. Control for Second set of Evaporator Pumps/Fans A second set (bank) of Pumps/Fans have been added to the HVAC software.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 However if Flow A indicates that there is flow then circuits 1 and 3 will be in a ready to run state and Flow B indicates that there is flow then circuits 2 and 4 will be in a ready to run state. The circuit states are based upon the flow indicators associated with that circuit.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The relays must be set up as Pulse Relay type and the Pulse on Time (in tenth of second) and the Delay Between Pulse (in seconds) columns must be setup. Suggest the initial values are Pulse on Time of 5 (.5 seconds) and Delay Between Pulse of 2 (2 seconds). 3) AO Type selected. Condenser Level: select from a drop down list of sensor inputs. This will provide the level of the condenser liquid level. Valve Actuator: select from a drop down list of analog outputs.
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MAGNUM VERSION 8 MANUAL # Name 217 CLLC VALVE TRG REVISION 3.1 Typical Value 50.0 30 10 50 218 CLLC MAX ROC 7.78.4. 2.5 Description The ‘Value’ is the target or minimum opening of the CLLC control valve. The ‘Time(sec)’ contains the normal delay between making valve adjustments. This time is expressed in seconds. The ‘Sec.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 ZONE 3 VLV CLOSG (XX): The unit is stable and the condenser liquid level is in ZONE 3 below the target opening and the liquid level rate of change is not increasing at an acceptable rate; therefore, the valve must be closed. ZONE 4 VLV HOLDG (XX): The unit is stable and the condenser liquid level is in ZONE 4 and the valve position is not being changed as the condenser liquid level rate of change is decreasing at an acceptable rate.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Setpoints 1 (chilled water target), 2 (plus dead band) & 3 (negative dead band) are used in this determination. Setpoint #2×3 46.5°F Setpoint #2×2 46.0°F Setpoint #2 45.5°F Setpoint #1 45.0°F Setpoint #3 44.5°F Setpoint #3×2 44.0°F Setpoint #3×3 43.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 liquid level is stable and in the control range then the valve is being controlled properly. To accomplish this control of the CLLC valve is based upon the level of the condenser liquid level. The value of set point #216 contains the target and the ‘Time(sec)’ field provides a plus and minus dead band. For example if the value is 60.0 and the ‘Time(sec)’ field is 3 then the control zone will be between 57.0 and 63.0.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.79. Lockout per Compressor In software 8.05-C and newer, the feature to lockout only certain affected compressors when communications to an I/O board is lost was added. The screen to setup this feature is found in MCS-Config under the MAG V8 screen under the Lockout Info panel. Each I/O board in the system will have its own column (Relay Output boards on the left, Sensor Input boards on the right).
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.80.1.2. Run Hour Lockout In the Setup screen select the option Run Hour Lockout Required. If enabled, then enter the number compressor run hours that must pass before the run hour lockout is triggered. In the authorization screen, setup a Run Hour Lockout level code. 7.80.2. MCS Connect (requires MCS-Connect 8.10-V) Two new chiller states have been added to MCS-Connect:  #28 “Factory Startup”  #29 “Maximum Run Time” 7.80.2.1.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 To deactivate the Factory Startup function, navigate back to the password screen and the following screen will appear. Select Yes to deactivate. Enter the correct password to deactivate the Factory Startup function. Select Yes to confirm you want to deactivate this function.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 When the password for Maximum Run Time is entered the user can reset the maximum number of compressor run hours. If reset is selected and chiller state is MAXIMUM RUN TIME the state will be changed to UNIT IS OFF. The maximum run hours counters for all compressors will be reset and normal processing will be allowed. If reset is selected and the chiller state is not MAXIMUM RUN TIME the state will not be changed but the maximum run hours counter will be reset.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Enter the correct password to deactivate the Maximum Run Time function. Select Yes to confirm you want to deactivate this function. 7.81. User Logic Magnum provides the user the ability to customize control logic and calculated values. This is done in MCS-Config by defining a Sensor Input, Relay Output, or Analog Output as a User Logic type.
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MAGNUM VERSION 8 MANUAL TYPE Fixed Value SI AO RO Setpoints CLOCK Unit Chiller Compressor #1 - Compressor #20 REVISION 3.1 ITEM Enter a fixed value with decimal place if required. Select Sensor Input Select Analog Output Select Relay Output Select Setpoint, number is also display for ease of selection. All Setpoints are shown, both active and inactive. Select system clock.
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MAGNUM VERSION 8 MANUAL * NOT (DI only) / NOT (DI only) >= <= > NOT (DI only) < NOT (DI only) == NOT = (DI only) REVISION 3.1 Operand 1 times the opposite value of Operand 2, which must be a digital. If Operand 2 is on value will be 1; therefore its opposite will be 0. Operand 1 divided by the opposite value of Operand 2, which must be a digital. If Operand 2 is on value will be 1; therefore its opposite will be 0. Sensor value will be on (true) if Operand 1 is greater than or equal to Operand 2.
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MAGNUM VERSION 8 MANUAL 7.81.4. REVISION 3.1 User Relay Output User Relay Outputs allow customized control of relays based on operand values. The User Relay Output can calculate a value derived from two operands and combine the calculated value with a greater than and less than conditions to turn a relay ON/OFF. The User relay is capable of delaying the relay ON condition before turning the relay ON.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 7.81.4.1. Examples of User Logic Relay Outputs In the above example the “Store Alarm Msg“ option has been enabled. When this relay goes from an OFF to an ON state an alarm message will be generated with the name of this relay. In this example, if either of the operands become true, then this relay will turn ON, an alarm message will be generated, and the General alarm relay will also turn ON. 7.81.5.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 In the above example if relay ‘RUN’ is OFF, the value of this Analog Output will be zero. If ON, the value will be calculated based on the Sensor Input ‘ChilWtrOut’. If ‘ChilWtrOut’s value is 40 (or less) then the Analog Output will be set to 0%; If 60 (or above) then the Analog Output will be 100%. The output value will vary based on a linear calculation between these two points.
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MAGNUM VERSION 8 MANUAL 8. REVISION 3.1 Magnum Alarms and Safeties There are three types of alarms that are generated by the Magnum control logic:    Information only alarms, Magnum system alarms and Chiller Setpoint safety alarms. All alarms have the same format. The alarm is identified and is date/time stamped. Alarms can be viewed from the Magnum keypad by selecting the ‘Alarms’ from the main menu, or through MCS-Connect. 8.1. Information Only Alarms 8.1.1.
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MAGNUM VERSION 8 MANUAL    REVISION 3.1 RS485 CHANGED – Generated when a user makes changes to the RS485 address through the Keypad/Display. CF CARD INSERTED – Generated when a user inserts a Compact Flash memory card into the Magnum. CF CARD REMOVED – Generated when a user removes a Compact Flash memory card from the Magnum. 8.1.3.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 within the time in the ‘Lockout Delay Hrs’ cell since the first trip, the circuit will be set to CMP LOCKED OUT state, which requires a manual reset to restart the compressor. If the lockout delay time is set to zero, the Magnum will generate a lockout condition the first time that the safety occurs. 8.3.1.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Low Suction Pressure If the suction pressure drops below the value of the Setpoint or the digital input turns ON for the time specified in the ‘Time (sec)’ field, the compressor will be locked out and a LOW SUCTION alarm generated. This safety is bypassed when the compressor is in a Pump Down state. This safety can also be used as a freeze protection based upon the suction pressure.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Dirty Oil Filter (Fixed Step Compressors only) If the difference between the discharge pressures minus the oil pressure is above the value of the Setpoint for the time specified in the Time (sec)’ field, a DIRTY OIL FILTER alarm will generate. Refer to section 13 Setpoint #97.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 SCR Temperature Fault (Hex code =0x0400) The measured SCR Temperature has exceeded either the Alarm or Fault limit. Probably due to insufficient SCR plate cooling. Lock Out Fault (Hex code =0x0800) If any (or a combination of) the Faults listed below occurs more than 3 times (reg. 40262) within 30 minutes (reg.
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MAGNUM VERSION 8 MANUAL 9. REVISION 3.1 Hardware Quick References 9.1.         Magnum Keypad Display No authorization is required to view information. Pressing the ‘MENU’ key will display the information below. Using the , , , and  buttons will change the selection to the item you want. Press the  (Enter) key to select the highlighted item. The bottom line of the display defines the functions of F1 –F3.
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MAGNUM VERSION 8 MANUAL 9.2. REVISION 3.1 MCS-Magnum Revision 8.
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MAGNUM VERSION 8 MANUAL 9.3. REVISION 3.
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MAGNUM VERSION 8 MANUAL 9.4. REVISION 3.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 10. Troubleshooting Quick Reference (A more detailed troubleshooting guide is available on our website: www.MCScontrols.com) PROBLEM POTENTIAL SOLUTION No Sensor + 5 vdc or sensor +5 vdc Indicates a possible shorted input sensor output is less than 4.90 vdc.  Remove all sensor terminal blocks.  Wait about 30 to 60 seconds. If + 5 vdc returns, replace one sensor wire at a time until the + 5 vdc is lost again. This will be the shorted sensor. A Sensor Input reads -99.
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MAGNUM VERSION 8 MANUAL PROBLEM SI from AMPS board 10 A low. INVALID CONFIG VER INVALID CONFIG TYPE INVALID CONFIG CHECKSUM Sensor input believed invalid (Under Sensor Diagnostic Sub Menu) Communications to MCS-485GATEWAY from MCS-Connect not working. INVALID CONFIG REVISION 3.1 POTENTIAL SOLUTION This indicates a problem with this SI only.  Jumper setting on this SI in wrong position.  Incorrect sensor type used. Indicates layout of CFG wrong.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 11. BMS Communication Protocols Magnum supports BACnet IP, Modbus RTU, Modbus TCP/IP, and Johnson N2. Supported baud rates for Modbus RTU and Johnson N2 are 4800bps, 9600bps, 19200bps, 38400bps, and 57600bps. 11.1.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 11.2. Relay Output Points Relay Output points are read-only.
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MAGNUM VERSION 8 MANUAL Magnum BACnet ID Analog Out 1-3 AO:7 Analog Out 1-4 AO:7 Analog Out 2-1 AO:8 Analog Out 2-2 AO:10 Analog Out 2-3 AO:11 Analog Out 2-4 AO:12 Analog Out 3-1 AO:13 Analog Out 3-2 AO:14 Analog Out 3-3 AO:15 Analog Out 3-4 AO:16 Analog Out 4-1 AO:17 Analog Out 4-2 AO:18 Analog Out 4-3 AO:19 Analog Out 4-4 AO:20 REVISION 3.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 11.6. Other Points These points are read-only.
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MAGNUM VERSION 8 MANUAL Magnum BACnet ID Compressor #9 Sat Suction AV: 443 Compressor #9 Sat Disch AV: 444 Compressor #9 Disch SH AV: 445 Compressor #9 Suct SH AV: 446 Compressor #9 Oil Pres Diff AV:524 Compressor #10 FLA% AV:447 Compressor #10 Sat Suction AV: 450 Compressor #10 Sat Disch AV: 451 Compressor #10 Disch SH AV: 452 Compressor #10 Suct SH AV: 453 Compressor #10 Oil Pres Diff AV:525 Compressor #11 FLA% AV:454 Compressor #11 Sat Suction AV: 457 Compressor #11 Sat Disch AV: 458 Compressor #11 Disc
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MAGNUM VERSION 8 MANUAL Magnum BACnet ID Compressor #18 Suct SH AV: 509 Compressor #18 Oil Pres Diff AV: 533 Compressor #19 FLA% AV: 510 Compressor #19 Sat Suction AV: 513 Compressor #19 Sat Disch AV: 514 Compressor #19 Disch SH AV: 515 Compressor #19 Suct SH AV: 516 Compressor #19 Oil Pres Diff AV: 534 Compressor #20 FLA% AV: 517 Compressor #20 Sat Suction AV: 520 Compressor #20 Sat Disch AV: 521 Compressor #20 Disch SH AV: 522 Compressor #20 Suct SH AV: 523 Compressor #20 Oil Pres Diff AV: 535 REVISION
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MAGNUM VERSION 8 MANUAL REVISION 3.1 The sensors must be set up as follows (This is only an example) 11.8. MCS Capacity Control State Chart The values exposed in the capacity state relate to the descriptions in this table.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 11.9. MCS Compressor Control State Chart The values expressed in the compressor state relate to the descriptions in this table.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 11.10.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 11.11.MCS-Magnum BMS protocols settings 11.11.1. Bacnet Over IP The BACNET DEVICE ID is a five-digit number. The first three digits are based on our Bacnet vendor ID 181, and the last two are set by the Bacnet/MSTP address. 181 XX   Bacnet Bacnet MS/TP Vendor ID Address The Bacnet address can be verified and changed (with the proper authorization code) from the Keypad/LCD.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 If you are going to manually assign the IP Address, Subnet Mask, and Default Gateway.       Press the Menu key, select Serv Tools, and then press the Enter key. Select Ethernet Network then press Enter. Set “DHCP Enabled” to NO. Set the “IP Address”. Set the “Subnet Mask”. Set “Default Gateway”.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 12. Relay Output Sequences The sequence of Relay Outputs must be correctly matched to the particular type of compressor being controlled. Relays are required unless marked as optional. If a relay is optional and it is not used then its position is skipped and the following relays will be moved up. Compressor type selection as displayed in MCS-Config is shown within brackets. 12.1.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Third liquid line solenoid (OPTIONAL) Reversing valve (heat pump) (OPTIONAL) Liquid injection #2 (OPTIONAL) Mod motor (OPTIONAL) 12.3.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Liquid injection #2 (OPTIONAL) Mod motor (OPTIONAL) 12.5.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 12.7.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 12.9. Centrifugal (Centrifugal Comp) Compressor relay Part winding compressor relay (OPTIONAL) Open Vane Close Vane Oil pump Oil heater Liquid line solenoid (OPTIONAL) Hot gas bypass (OPTIONAL) Liquid injection (OPTIONAL) Fast unloader (OPTIONAL) Second liquid line solenoid (OPTIONAL) Oil equalization (OPTIONAL) Oil seal cooler (OPTIONAL) Liquid injection #2 (OPTIONAL) Mod motor (OPTIONAL) 12.10.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 Liquid injection (OPTIONAL) Fast unloader (OPTIONAL) Second liquid line solenoid (OPTIONAL) Oil equalization (OPTIONAL) Oil seal cooler (OPTIONAL) VI increase valve % (OPTIONAL) VI decrease valve % (OPTIONAL) Start unloader bypass (OPTIONAL) Low disc superheat (OPTIONAL) Hot gas reheat off (OPTIONAL) If hot gas reheat all 3 hot gas relays are required.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 13. Magnum V8 Setpoints # (Number) - From 1 to 230 (maximum number of Setpoints supported). Only active Setpoints will be displayed in MCS-Connect and on the keypad display. Name - The Setpoint’s name consists of up to 12 characters. The name is displayed following the number on the LCD display. The Setpoint name can be changed to make it more meaningful to the current application, however the function of the Setpoint will remain the same.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 entire package or an individual compressor depending on the purpose of the safety. The Magnum will then wait the Safety Down Time contained in that Setpoint before trying to return the normal. If successful, the system will continue to operate. If a second trip occurs on the same Setpoint with in the Lock Out Delay Time that is contained in that Setpoint the system will move to a LOCKOUT state.
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MAGNUM VERSION 8 MANUAL REVISION 3.1 13.2. Setpoints for Magnum HVAC and CENT V8 Software If a particular Setpoint is supported only in either HVAC or CENT software it will be indicated with (Only HVAC) or (Only CENT).
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MAGNUM VERSION 8 MANUAL # 8 Name L.INJECT.
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MAGNUM VERSION 8 MANUAL # 19 Name STAGE 15 CUT IN (Cut In/Out Control) LOWSUCPSI DLY STAGE 16 CUT IN (Cut In/Out Control) EXV DELAY 20 EXV STRT TIME 21 MAX TRG RESET 22 LOW AMBIENT 23 POWERUP DELAY 24 HI AMBIENT 25 STEP SENSTIY 26 STEP DELAY 27 MAX ROC - 28 MAX ROC + 29 ROC INTERV 18 REVISION 3.1 Description Stage 15 cut in, Setpoint value contains the voltage when this stage is turned on. Delay in seconds when in ‘Low Suction PSI Opening’ between adjustments to the EXV valve.
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MAGNUM VERSION 8 MANUAL # 30 Name MAX FLA% or MAX SLIDE % or MAX CAPACITY% or MAX VFD % 31 MIN FLA% or MIN SLIDE % or MIN CAPACITY% or MIN VFD % 32 MAX ADJUST % 33 MIN ADJUST % 34 SLIDE SENSITY 35 AMP DB HI 36 AMP DB LO 37 LOAD PULSE 38 UNLOAD PULSE REVISION 3.1 Description Indicates the maximum amp draw, slide %, digital scroll load%, or speed allowed. Usually set to 100%, else compressors will load to the value of this Setpoint until all steps are on, then the system will load to 100%.
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MAGNUM VERSION 8 MANUAL # 39 Name LUBE OIL TMP 40 LUBE OIL PSI 41 LUBE DELAY 42 HI WATER TMP 43 CENT P-DWN FLA 44 CENT P-DWN TMR 45 CND STG1 ON (RO Type) 46 CND STG1 OFF (RO Type) CND DIFF ON (RO Type) CND DIFF OFF (RO Type) CND ADJ DELAY (Modulating Type) 47 48 49 DUAL PSI DELTA (Dual V8) CND MIN RUN (RO Type) DUAL TIME DELAY (Dual V8) CND START % (Modulating Type) REVISION 3.1 Description The oil must reach this temperature before the system will move out of the LUBE state.
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MAGNUM VERSION 8 MANUAL # 50 Name CND TRGT (Modulating Type) LO AMB SUMP OFF (RO Type) 51 CND ADJ DIV (Modulating Type) CND VFD MIN 52 CND MIN % (Modulating Type) 53 CND ROC (Modulating Type) 54 56 CND MIN SPD (RO Type) CND ADJ MULT (Modulating Type) CND MAX SPD (RO Type) CND MIN ADJ (Modulating Type) PULSE DELAY 57 LO AMB PROC 58 CFG TESTING 59 ACYC OFF->ON 60 MITSI P-DWN CUTIN 55 REVISION 3.1 Description Target the logic will try to maintain by modulating the AO.
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MAGNUM VERSION 8 MANUAL # 61 Name PMP DWN OFF 62 PMP DWN DELY 63 ACYC ON->ON 64 COMP MIN RUN 65 66 EXV ZONE1 EXV ZONE2 67 EXV ROC ZONE 1 68 EXV ROC ZONE1 69 EXV ROC ZONE2 70 EXV ROC ZONE3 71 EXV TOO FAST 72 EXV CHANGING 73 STARTER DLAY 74 OIL PUMP OFF REVISION 3.1 Description This is the suction pressure value for turning off the compressor when in the PUMP DOWN or for opening the liquid line solenoid during the PRE-PUMP down state.
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MAGNUM VERSION 8 MANUAL # 75 Name HI AMPS 76 LO AMPS 77 LOW SUCTION 78 LO SUCT UNLD 79 80 LOW SUCT RELD UNSAFE SUCT 81 HI DISC PSI 82 HI DISC UNLD 83 84 HI DISC RELD LO DISC SHEAT 85 LO DISC PSI REVISION 3.1 Description This Setpoint is a percentage of the FLA; it is used to create the high amp draw limit. The value of this Setpoint is multiplied by the respective compressor’s full load amps Setpoint (#171 through #190) to obtain its upper limit.
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MAGNUM VERSION 8 MANUAL # 86 Name HI RETURN TEMP 87 HI DISC TMP 88 DIS TMP UNLD (Not CENT?) 89 90 DIS TMP RELD COND FAULT 91 LOW OIL DIF 92 UNSAFE OIL 93 HI OIL SEAL 94 HI OIL TEMP 95 MOTOR FAULT 96 NO CMP PROOF 97 DIRTY FILTER REVISION 3.1 Description Only active in Mitsubishi compressors. If active the Magnum will check for high entering liquid temperature. If this temperature is greater than the value in this Setpoint, the circuit state will be HI WATER HOLD.
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MAGNUM VERSION 8 MANUAL # 98 Name LLS#2 ON 99 LLS#3 ON (ECONOMIZER) 100 HIGH SUMP TEMP 101 SAFETY HOLD DELAY 102 PUMP FREEZE PROTECTION 103 LEAD COMP 104 COMP ROTATION 105 PUMP FAILURE (NO FLOW) REVISION 3.1 Description This Setpoint is used to control a second liquid line solenoid.
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MAGNUM VERSION 8 MANUAL # 106 Name LEAD PUMP 107 EcoDelayMech 108 PUMP DELAY 109 HiRefLevel 110 RefLvlExvAdj (EXV Control: Refrigerant Level) 111 DSprhtExvAdj (EXV Control: Discharge or Suction Superheat) FREEZE 112 NO STOP 113 OIL INJ TEMP DIFF 114 OIL TEMP DIFF 115 EcoVFDfanDely 116 Defrost On Temp 117 118 Defrost On Delay Defrost On Cycle REVISION 3.1 Description Indicates which pump is the lead.
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MAGNUM VERSION 8 MANUAL # 119 Name EcoOffsetON 120 Eco Stg Dely 120 121 H-PMP SW TIME Eco MIN VLV% 122 123 Eco MAX VLV% Eco MAX ADJ 124 125 EcoVlvAdjDly Eco StageDly 126 Eco MULTI 127 Eco DIVIDE 128 Lost Leg Alarm (Only HVAC) 129 130 131 132 133 134 135 CmpMinSpeed% (Only CENT) RH CUTIN (Only HVAC) CmpMaxSpeed% (Only CENT) RH CUTOUT ADJ (Only HVAC) CmpSpdUnld% (Only CENT) RH START DLY (Only HVAC) CmpSpdLoad% (Only CENT) RH BLEED DLY (Only HVAC) MinLiftTemp (Only CENT) RH STAGE DLY (On
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MAGNUM VERSION 8 MANUAL # 136 Name VI PULSE 137 VI DEADBAND 138 139 VI DELAY OIL FLOAT 140 141 NOT IN USED: 208 NOT IN USED: 209 142 SERVICE MODE 143 UNLOADED % 144 OIL HEATER ON 145 OIL COOLER ON 146 147 PROC TARG PROC ZONE 148 PROC DELY 149 PROC MAX ROC 150 PROC MIN SPD% 151 UNLOADED OFF REVISION 3.1 Description Used with an adjustable VI, volume ratio. This is the pulse time expressed in tenths of a second to adjust the VI. Used with an adjustable VI, volume ratio.
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MAGNUM VERSION 8 MANUAL # 152 Name HP OVERHEAT 153 SftyUnld Del 154 VFD Sfty Adj 155 LO REF TMP 156 LO REF UNLD 157 HP LoSuctAdj (Only HVAC) 158 159 160 COV LIFT TEMP (Only CENT) B-PUMP DELAY (Boiler/Pump Control) DEF TRIG TMP (Only HVAC) B-STAGE DELY (Boiler/Pump Control) DEF TRIG DEL (Only HVAC) B-VFD DELAY (Boiler/Pump Control) DEF REV DEL (Only HVAC) B-VFD TARGET (Boiler/Pump Control) REVISION 3.
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MAGNUM VERSION 8 MANUAL # 161 Name DEF TERM TMP (Only HVAC) B-PUMP FLT (Boiler/Pump Control) 162 DEF TERM DEL (Only HVAC) HP HEAT TARG (Only HVAC) Purge Target (Only CENT) 163 166 B-HEAT TRGT (Boiler/Pump Control) HP CTL ZONE + (Only HVAC) Purge Fault (Only CENT) B-HEAT ZONE+ (Boiler/Pump Control) HP CTL ZONE – (Only HVAC) Purge ExTime (Only CENT) B-HEAT ZONE(Boiler/Pump Control) PHASE LOSS 167 PURGE FLT ERROR 168 PURGE COUNT 169 PURGE PSI ST 170 EXCESS PURGE 171 FLA COMP#1 172 173 174 175
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MAGNUM VERSION 8 MANUAL # 180 181 182 183 184 185 186 187 188 189 190 Name FLA COMP#10 FLA COMP#11 FLA COMP#12 FLA COMP#13 FLA COMP#14 FLA COMP#15 FLA COMP#16 FLA COMP#17 FLA COMP#18 FLA COMP#19 B-FLA PUMP (Boiler/Pump Control) FLA COMP#20 B-FLA BOILER (Boiler/Pump Control) 191 TEMP DIFF 192 FRZ TEMP DIFF 193 CND HI/LO ZONE 194 CND 2ND ZONE 195 LOW VOLTAGE 196 HI VOLTAGE 197 LEAD Procom (Only HVAC) COND LOW AMB (Only CENT) 198 199 200 PROC PUMP FLT.
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MAGNUM VERSION 8 MANUAL # 201 Name MOP ADJ % TME (Only HVAC) LOW SI OFF (Only CENT) 202 DELTA TEMP EVP (Only HVAC) HI SI OFF (Only CENT) 203 HiSuctSheat (Only HVAC) 204 COND LOW AMB (Only HVAC) SurgeHldDlay (Only CENT) REVISION 3.1 Description The adjustment value by which the EXV valve will close each time the MOP logic calls for it to maintain the suction pressure target. This adjustment will be made each time after the delay in the ‘Time (sec)’ field has expired.
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MAGNUM VERSION 8 MANUAL # 205 Name MDP MIN OIL DIFF (Only HVAC) REVISION 3.1 Description If active, MDP logic will be added to EXV control. If the oil differential pressure is less than the value of this Setpoint following compressor start up during the time specified in the Sec to Ignore Safety field, then the MDP function is active and will close the EXV valve to restore the oil differential pressure.
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MAGNUM VERSION 8 MANUAL # 210 211 212 Name COMP SURGING (Only CENT) (HVAC 08.02E1 or Greater Formerly #141) ECO LL3 D-SHT (Only HVAC) AMP SurgeROC (Only CENT) NO OIL FLOW (Only HVAC) LiftSurgeROC (Only CENT) COMP SPD FLT (Only HVAC) SurgingCount (Only CENT) 213 214 PROC LOW FLOW (Only HVAC) SurgingTime (Only CENT) NO OIL FLOW (Only CENT) 215 COMP SPD FLT (Only CENT) 216 LIS MOTOR TEMP REVISION 3.1 Description The number of surges allowed before a safety trip occurs.
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MAGNUM VERSION 8 MANUAL # Name CLLC LEVEL TRG (Only CENT) 217 CLLC VALVE TRG (Only CENT) LOW EXV TARGET (Only HVAC) REVISION 3.1 Description The ‘Value’ is the target that is to be maintained of the condenser liquid level. The ‘Time(sec)’ contains the dead band of the target. For example if the value is 60.0 (target) and the ‘Time(sec)’ field is 5 (dead band) the control zone for the condenser liquid level is between 55.0 and 65.0.
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MAGNUM VERSION 8 MANUAL # 225 226 Name CLLC LEVEL TARGET CLLC VALVE TARGET 227 228 CLLC MAX ROC Force On Oil Recovery 229 CHK VALVE FLT 230 MAX DIFF PSI ROC REVISION 3.1 Description Condenser Liquid Level Control level target. The safety time is dead band + and -. ‘Safety Time’ is normal delay between valve adjustments. Time to bypass safety test is delay when in startup or unstable. Time to extend safety time is ADJ % if AO valve. Condenser Liquid Level Control max ROC both + & -.