48TCA04---A12 Nominal 3 to 10 Tons With Puron® (R---410A) Refrigerant Service and Maintenance Instructions TABLE OF CONTENTS SAFETY CONSIDERATIONS SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 1 Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.
WARNING 48TC ! FIRE, EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death and/or property damage. Refer to the User’s Information Manual provided with this unit for more details. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. What to do if you smell gas: DO NOT try to light any appliance. DO NOT touch any electrical switch, or use any phone in your building.
Seasonal Maintenance These items should be checked at the beginning of each season (or more often if local conditions and usage patterns dictate): Air Conditioning S Condenser fan motor mounting bolts tightness S Compressor mounting bolts S Condenser fan blade positioning S Control box cleanliness and wiring condition S Wire terminal tightness S Refrigerant charge level S Evaporator coil cleaning S Evaporator blower motor amperage Heating S Heat exchanger flue passageways cleanliness S Gas burner condition
inside surfaces. Check belt tension by using a spring-- force tool (such as Browning’s Part Number “Belt Tension Checker” or equivalent tool); tension should be 6-- lbs at a 5/8-- in. deflection when measured at the centerline of the belt span. This point is at the center of the belt when measuring the distance between the motor shaft and the blower shaft.
Motor 1. Shut off unit power supply. 2. Loosen belt by loosening fan motor mounting nuts. (See Fig. 5.) 3. Loosen movable pulley flange setscrew. (See Fig. 6.) 4. Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease speed. Increasing fan speed increases load on motor. Do not exceed maximum speed specified. 5. Set movable flange at nearest keyway of pulley hub and tighten setscrew to torque specifications. To align fan and motor pulleys: 1.
life of the coil and extend the life of the unit. The following maintenance and cleaning procedures are recommended as part of the routine maintenance activities to extend the life of the coil. Two-- Row Coils Clean coil as follows: 1. Turn off unit power, tag disconnect. 2. Remove top panel screws on condenser end of unit. 3. Remove condenser coil corner post. See Fig. 8. To hold top panel open, place coil corner post between top panel and center post. See Fig. 9.
. 8. 9. 10. 11. S 2-- 1/2 gallon garden sprayer S Water rinse with low velocity spray nozzle ! CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in accelerated corrosion of unit parts. Harsh chemicals, household bleach or acid or basic cleaners should not be used to clean outdoor or indoor coils of any kind. These cleaners can be very difficult to rinse out of the coil and can accelerate corrosion at the fin/tube interface where dissimilar materials are in contact.
(See Fig. 11.) This check valve is permanently assembled into this core body and cannot be serviced separately; replace the entire core body if necessary. Service tools are available from RCD that allow the replacement of the check valve core without having to recover the entire system refrigerant charge. Apply compressor refrigerant oil to the check valve core’s bottom o-- ring. Install the fitting body with 96 +/ - 10 in-- lbs of torque; do not overtighten.
A04 A05 A06 A07 A08 A09 A12 NOMINAL TONS REFERENCE 3 4 5 6 7.5 8.5 10 EXAMPLE: Model 48TC*A04 Outdoor Temperature . . . . . . . . . . . . . . . . . . 85_F (29_C) Suction Pressure . . . . . . . . . . . . . . . . . 140 psig (965 kPa) Suction Temperature should be . . . . . . . . . . 60_F (16_C) COOLING CHARGING CHARTS 48TC SIZE DESIGNATION Fig.
48TC COOLING CHARGING CHARTS (cont.) C08204 Fig. 12 (cont.
48TC COOLING CHARGING CHARTS (cont.) C08229 Fig. 12 (cont.
48TC COOLING CHARGING CHARTS (cont.) C08438 Fig. 12 (cont.
Table 1 – Cooling Service Analysis Compressor and Condenser Fan Will Not Start. Compressor Will Not Start But Condenser Fan Runs. CAUSE Power failure. Fuse blown or circuit breaker tripped. Defective thermostat, contactor, transformer, or control relay. Insufficient line voltage. Incorrect or faulty wiring. Thermostat setting too high. Faulty wiring or loose connections in compressor circuit. Compressor motor burned out, seized, or internal overload open.
Compressor 2. Remove condenser-- fan assembly (grille, motor, and fan). 3. Loosen fan hub setscrews. 4. Adjust fan height as shown in Fig. 13. 5. Tighten setscrews. 6. Replace condenser-- fan assembly. Lubrication The compressor is charged with the correct amount of oil at the factory. 48TC ! CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in damage to components. The compressor is in a PuronR refrigerant system and uses a polyolester (POE) oil.
Unit-- powered type: A unit-- mounted transformer is factory-- installed to stepdown the main power supply voltage to the unit to 115-- v at the duplex receptacle. This option also includes a manual switch with fuse, located in a utility box and mounted on a bracket behind the convenience outlet; access is through the unit’s control box access panel. See Fig. 14. The primary leads to the convenience outlet transformer are not factory-- connected. Selection of primary power source is a customer-- option.
Duct smoke sensor Duct smoke sensor controller Exhaust tube Conduit nuts (supplied by installer) Exhaust gasket Sensor housing and electronics See Detail A Conduit support plate Terminal block cover Controller housing and electronics Intake gasket Cover gasket (ordering option) Cover gasket (ordering option) Controller cover Conduit couplings (supplied by installer) TSD-CO2 (ordering option) 48TC Sensor cover Plug Fastener (2X) Sampling tube (ordered separately) Coupling Detail A Trouble Al
Return Air without Economizer — The sampling tube is located across the return air opening on the unit basepan. See Fig. 19. The holes in the sampling tube face downward, into the return air stream. The sampling tube is connected via tubing to the return air sensor that is mounted on a bracket high on the partition between return filter and controller location. (This sensor is shipped in a flat-- mounting location.
B D C F 48TC E A Fig. 23 - Typical Smoke Detector System Wiring Highlight C: 24-- v power signal via ORN lead is removed at Smoke Detector input on LCTB; all unit operations cease immediately. PremierLink and RTU-- MP Controls: Unit operating functions (fan, cooling and heating) are terminated as described above. In addition: Sensor and Controller Tests Sensor Alarm Test The sensor alarm test checks a sensor’s ability to signal an alarm state.
Table 2 – Dirty LED Test CAUTION OPERATIONAL TEST HAZARD Failure to follow this caution may result in personnel and authority concern. This test places the duct detector into the alarm state. Disconnect all auxiliary equipment from the controller before performing the test. If the duct detector is connected to a fire alarm system, notify the proper authorities before performing the test. Controller Alarm Test Procedure 1. Press the controller’s test/reset switch for seven seconds. 2.
48TC SD-- TRK4 Remote Alarm Test Procedure 1. Turn the key switch to the RESET/TEST position for seven seconds. 2. Verify that the test/reset station’s Alarm LED turns on. 3. Reset the sensor by turning the key switch to the RESET/TEST position for two seconds. 4. Verify that the test/reset station’s Alarm LED turns off. Remote Test/Reset Station Dirty Sensor Test The test/reset station dirty sensor test checks the test/reset station’s ability to initiate a sensor dirty test and indicate the results.
Trouble Alarm Power Test/reset switch Fig. 26 - Controller Assembly NOTE: All troubles are latched by the duct smoke detector. The trouble condition must be cleared and then the duct smoke detector must be reset in order to restore it to the normal state. Resetting Alarm and Trouble Condition Trips: Manual reset is required to restore smoke detector systems to Normal operation.
48TC Controller’s Power LED is Off 1. Make sure the circuit supplying power to the controller is operational. If not, make sure JP2 and JP3 are set correctly on the controller before applying power. 2. Verify that power is applied to the controller’s supply input terminals. If power is not present, replace or repair wiring as required. Remote Test/Reset Station’s Trouble LED Does Not flash When Performing a Dirty Test, But the Controller’s Trouble LED Does 1.
Table 6 – Liquid Propane Supply Line Pressure Ranges Limit Switch and Shield UNIT MODEL 48TCD,E,F 48TCS,R,T 48TCL,M,N UNIT SIZE MIN 11.0 in. wg (2740 Pa) NA All All MAX 13.0 in. wg (3240 Pa) NA Manifold pressure for LP fuel use must be adjusted to specified range. Follow instructions in the accessory kit to make initial readjustment. Table 7 – Liquid Propane Manifold Pressure Ranges Fig.
This switch also prevents operation when the propane tank level is low which can result in gas with a high concentration of impurities, additives, and residues that have settled to the bottom of the tank. Operation under these conditions can cause harm to the heat exchanger system. Contact your fuel supplier if this condition is suspected. season, inspect blower wheel bi-- monthly to determine proper cleaning frequency. To access burner section, slide the sliding burner partition out of the unit.
CAUTION ! EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage. When working on gas train, do not hit or plug orifice spuds. Main Burners To access burners, remove burner access panel and slide out burner partition. At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner flames and adjust, if necessary. Orifice projection — Refer to Fig.
48TC 1. Remove manifold pressure tap plug from manifold and connect pressure gauge or manometer. (See Fig. 33.) 2. Turn on electrical supply. 3. Turn on unit main gas valve. 4. Set room thermostat to call for heat. If unit has two-stage gas valve, verify high-- stage heat operation before attempting to adjust manifold pressure. 5. When main burners ignite, check all fittings, manifold, and orifices for leaks. 6.
125,000/90,000 BTUH INPUT 48TC 180,000/120,000 BTUH INPUT 240,000/180,000 BTUH INPUT 250,000/200,000 BTUH INPUT Fig.
48TC 2 Stage Single Stage Fig. 37 - Gas Valves C08210 Red LED-Status Fig.
Table 9 – IGC Connections TERMINAL LABEL POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O CONNECTION PIN NUMBER INPUTS RT, C Input power from TRAN 1 control box 24 VAC SS Speed sensor gas section analog input — FS, T1 Flame sensor gas section switch input J1, 1-3 — W Heat stage 1 LCTB 24 VAC J2, 2 RS Rollout switch gas section switch input J2, 5-6 LS Limit switch fan section switch input J2, 7-8 CS Centrifugal switch (not used) switch input J2, 9-10 — L1, CM Induced draf
Table 11 – Altitude Compensation* (A04-- A07) 48TC ELEVATION ft (m) 0 --- 2000 (610) 2000 (610) 3000 (914) 4000 (1219) 5000 (1524) 6000 (1829) 7000 (2134) 8000 (2438) 9000 (2743) 10000 (3048) 11000 (3353) 12000 (3658) 13000 (3962) 14000 (4267) 72,000 BTUH Nominal NG Orifice Size 331 351 351 361 361 372 382 392 †40 †41 †42 †43 †43 442 LP Orifice Size 514 514 524 524 524 524 534 534 534 544 544 544 554 †56 115,000 BTUH Nominal NG LP Orifice Size Orifice Size 331 503 351 514 351 514 1 36 514 1 36 514 372
Table 12 – Altitude Compensation* (A04-- A06) - Low NOx Units 0 --- 2000 (610) 2000 (610) 3000 (914) 4000 (1219) 5000 (1524) 6000 (1829) 7000 (2134) 8000 (2438) 9000 (2743) 10000 (3048) 11000 (3353) 12000 (3658) 13000 (3962) 14000 (4267) 60,000, 90,000 BTUH Nominal NG Orifice Size LP Orifice Size 382 534 2 39 544 †40 544 †41 544 †41 544 †42 544 †42 544 †43 554 †43 554 2 44 554 2 44 554 452 †56 473 †56 483 †56 LEGEND NG = Natural Gas LP = Liquid Propane * As the height above sea level increases, there is
Table 13 – Heating Service Analysis PROBLEM CAUSE Misaligned spark electrodes. No gas at main burners. 48TC Burners Will Not Ignite. Water in gas line. No power to furnace. No 24 v power supply to control circuit. Miswired or loose connections. Burned ---out heat anticipator in thermostat. Broken thermostat wires. Dirty air filter. Gas input to unit too low. Inadequate Heating. Unit undersized for application. Restricted airflow. Blower speed too low. Limit switch cycles main burners.
Table 14 – IGC Board LED Alarm Codes On Off DESCRIPTION Normal Operation Hardware Failure ACTION TAKEN BY CONTROL RESET METHOD — — No gas heating. — PROBABLE CAUSE — Loss of power to the IGC. Check 5 amp fuse on IGC, power to unit, 24V circuit breaker, transformer, and wiring to the IGC. High temperature limit switch is open. Check the operation of the indoor (evaporator) fan motor. Ensure that the supply-air temperature rise is within the range on the unit nameplate.
48TC C08199 Fig. 40 - PremierLink Controller PREMIERLINKT CONTROL The PremierLink controller (see Fig. 40) is compatible with Carrier Comfort Networkr (CCN) devices. This control is designed to allow users the access and ability to change factory-- defined settings, thus expanding the function of the standard unit control board. CCN service access tools include System Pilot (TM), Touch Pilot (TM) and Service Tool.
Fig.
48TC Table 15 – Thermistor Resistance vs Temperature Values for Space Temperature Sensor, Supply Air Temperature Sensor, and Outdoor Air Temperature Sensor TEMP (C) ---40 ---35 ---30 ---25 ---20 ---15 ---10 ---5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 TEMP (F) ---40 ---31 ---22 ---13 ---4 5 14 23 32 41 50 59 68 77 86 95 104 113 122 131 140 149 158 RESISTANCE (Ohms) 335,651 242,195 176,683 130,243 96,974 72,895 55,298 42,315 32,651 25,395 19,903 15,714 12,494 10,000 8,056 6,530 5,325 4,367 3,601 2,985
APPLICATION Differential Dry Bulb Temperature with PremierLink (PremierLink requires 4---20 mA Actuator) Single Enthalpy with PremierLink (PremierLink requires 4---20mA Actuator) Differential Enthalpy with PremierLink (PremierLink requires 4---20mA Actuator) OUTDOOR AIR TEMPERATURE SENSOR RETURN AIR TEMPERATURE SENSOR OUTDOOR AIR ENTHALPY SENSOR RETURN AIR ENTHALPY SENSOR Included --CRTEMPSN001A00 Required --33ZCT55SPT or equivalent --- --- Included --Not Used --- Requires --HH57AC077 or equivale
48TC Table 18 – Thermostat Mode TB1 TERMINAL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LEGEND: CCN --G --IAQ --OAQ --RAT --- FIELD CONNECTION RAT SEN G RAT SEN Y1 INPUT SIGNAL Analog (10k thermistor) Discrete, 24VAC Analog (10k thermistor) Discrete, 24VAC Y2 LOOP---PWR W1 IAQ ---SEN W2 IAQ ---COM/OAQ ---COM/RH ---COM CCN + (RED) OAQ ---SEN/RH ---SEN CCN Gnd (WHT) AUX OUT (Power Exhaust) CCN --- (BLK) Discrete, 24VAC Analog, 24VDC Discrete, 24VAC Analog, 4---20mA Discrete, 24VAC Analog, 4---20mA Digital, 5
return air sensor is wired to the enthalpy controller (HH57AC077). See Fig. 49. ENTHALPY CONTROLLER When the PremierLink is configured for Thermostat Mode, these functions are not available: Fire Shutdown (FSD), Remote Occupied (RMTOCC), Compressor Safety (CMPSAFE), Supply Fan Status (SFS), and Filter Pressure Switch (FILTER).
requirements and terminal locations. See Fig. 50 for typical CO2 sensor wiring schematic. Refer to Form 33CS-- 58SI, PremierLink Installation, Start-- up, and Configuration Instructions, for detailed configuration information Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus weatherproof enclosure) — The outdoor air CO2 sensor is designed to monitor carbon dioxide (CO2) levels in the outside ventilation air and interface with the ventilation damper in an HVAC system.
Fan (Pressure) Switch (NO, close on rise in pressure) LCTB Thermostat R TB1 Alarm state is reset when the smoke detector alarm condition is cleared and reset at the smoke detector in the unit. Filter Status Switch — This function is available only when PremierLink is configured for (Space) Sensor Mode. PremierLink control can monitor return filter status in two ways: By monitoring a field-- supplied/installed filter pressure switch or via supply fan runtime hours.
At any baud (9600, 19200, 38400 baud), the number of controllers is limited to 239 devices maximum. Bus length may not exceed 4000 ft, with no more than 60 total devices on any 1000-- ft section. Optically isolated RS-- 485 repeaters are required every 1000 ft. Connect the CCN (+) lead (typically RED) to the unit s TB1-- 12 terminal. Connect the CCN (ground) lead (typically WHT) to the unit’s TB1-- 14 terminal. Connect the CCN (-- ) lead (typically BLK) to the unit’s TB1-- 16 terminal. See Fig. 58.
48TC Fig.
44 Fig.
Table 21 – RTU-- MP Controller Inputs and Outputs Space Temperature Sensor Supply Air Temperature Local Outside Air Temperature Sensor Space Temperature Offset Pot Indoor Air Quality Outdoor Air Quality Safety Chain Feedback Compressor Safety Fire Shutdown Enthalpy Switch Humidistat Input Status Space Relative Humidity Outside Air Relative Humidity Supply Fan Status Filter Status Remote Occupancy Input Economizer Commanded Position Supply Fan Relay State Compressor 1 Relay State Compressor 2 Relay State He
connects to the RTU-- MP must be routed through the raceway built into the corner post as shown in Fig. 34. The raceway provides the UL required clearance between high-- and low-- voltage wiring. Pass the control wires through the hole provided in the corner post, then feed the wires thorough the raceway to the RTU-- MP. Connect to the wires to the removable Phoenix connectors and then reconnect the connectors to the board. terminal (BRN) to J20-- 2. Connect the SET terminal (STO or BLK) to J20-- 3.
To wire the return air enthalpy sensor, perform the following: 1. Use a 2-- conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller. 2. At the enthalpy control remove the factory-- installed resistor from the (SR) and (+) terminals. 3. Connect the field-- supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (SR+) terminal on the enthalpy controller.
Alarm state is reset when the smoke detector alarm condition is cleared and reset at the smoke detector in the unit. 48TC Connecting Discrete Inputs Filter Status The filter status accessory is a field-- installed accessory. This accessory detects plugged filters. When installing this accessory, the unit must be configured for filter status by setting MENU→Config→Inputs→input 3, 5, 8, or 9 to Filter Status and normally open (N/O) or normally closed (N/C).
Local Access BACview6 Handheld The BACview6 is a keypad/display interface used to connect to the RTU-- MP to access the control information, read sensor values, and test the RTU, see Fig. 68. This is an accessory interface that does not come with the MP controller and can only be used at the unit. Connect the BACview6 to the RTU-- MP’s J12 local access port. There are 2 password protected levels in the display (User and Admin). The user password is defaulted to 0000 but can be changed.
Table 22 – LEDs The LEDs on the RTU-- MP show the status of certain functions Status is... The RTU MP has power The RTU MP is receiving data from the network segment The RTU MP is transmitting data over the network segment The digital output is active If this LED is on... Power Rx Tx DO# The Run and Error LEDs indicate control module and network status If Run LED shows... 2 flashes per second 2 flashes per second 48TC 2 flashes per second 2 flashes per second And Error LED shows...
Table 23 – Troubleshooting Alarms Safety Chain Alarm safety_chain Fire Shutdown Alarm fire_alarm Space Temp Sensor Failure spt_alarm SAT Sensor Alarm sat_alarm High Space Temp Alarm spt_hi Alarm Generated Automatic Low Space Temp Alarm spt_lo Alarm Generated Automatic High Supply Air Temp sat_hi Alarm Generated Automatic Low Supply Air Temp sat_lo Alarm Generated Automatic Supply Fan Failed to Start sf_fail Supply Fan in Hand sf_hand Compressor Safety Alarm dx_compstat Setpoin
48TC Alarms Alarms can be checked through the network and/or the local access. All the alarms are listed in Table 23 with name, object name, action taken by control, reset method, and probable cause. There are help screens for each alarm on the local access display and listed in Form 48-- 50H-- T-- 2T, Appendix A: Help Screens. Some alarms are explained in detail below. Safety Chain Alarm This alarm occurs immediately if the supply-- fan internal overload trips or if an electric-- heat limit switch trips.
S Max Masters: Defines the highest MS/TP Master MAC address on this MS/TP network. For example, if there are 3 master nodes on an MS/TP network, and their MAC addresses are 1, 8, and 16, then Max Masters would be set to 16 (since this is the highest MS/TP MAC address on the network). This property optimizes MS/TP network communications by preventing token passes and “poll for master” requests to non-- existent Master nodes (i.e.
48TC Table 24 – Manufacture Date When troubleshooting, you may need to know a control module’s manufacture date Obtain the manufacture date from a... Notes Module status report (modstat) To obtain a modstat with BACview6: 1. Press Function (FN) key and hold. 2. Then press period (.) 3. Release both buttons. The report shows the date under Main board hardware.
N2 ECONOMIZER SYSTEMS The 48TC units may be equipped with a factory-- installed or accessory (field-- installed) economizer system. Two types are available: with a logic control system (EconoMi$er IV) and without a control system (EconoMi$er2, for use with external control systems such as PremierLink). See Fig. 70 and Fig. 71 for component locations on each type. See Fig. 72 and Fig. 73 for economizer section wiring diagrams. Both EconoMi$ers use direct-- drive damper actuators.
FOR OCCUPANCY CONTROL REPLACE JUMPER WITH FIELD-SUPPLIED TIME CLOCK 8 48TC 7 LEGEND DCV— Demand Controlled Ventilation IAQ — Indoor Air Quality LA — Low Ambient Lockout Device OAT — Outdoor-Air Temperature POT — Potentiometer RAT — Return-Air Temperature Potentiometer Defaults Settings: Power Exhaust Middle Minimum Pos. Fully Closed DCV Max. Middle DCV Set Middle Enthalpy C Setting NOTES: 1. 620 ohm, 1 watt 5% resistor should be removed only when using differential enthalpy or dry bulb. 2.
Table 27 – EconoMi$er IV Input/Output Logic Below set (DCV LED Off) Above set (DCV LED On) Outdoor Return High (Free Cooling LED Off) Low Low (Free Cooling LED On) High High (Free Cooling LED Off) Low Low (Free Cooling LED On) High On On Off Compressor Y2 Stage Stage 1 2 On On On Off On Off Off Off Off On On On Off On Off Off Off Off On Off On Off On Off On On Off On Off Off On On Off Off On Off Off Off On Off Off Off Off Off Off Y1 OUTPUTS N Terminal† Occupied Unoccupied
Supply Air Temperature (SAT) Sensor The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan. (See Fig. 75.) This sensor is factory installed. The operating range of temperature measurement is 0° to 158_F (-- 18_ to 70_C). See Table 15 for sensor temperature/resistance values. and D. See Fig. 77 for the corresponding temperature changeover values.
In this mode of operation, the outdoor-air temperature is compared to the return-air temperature and the lower temperature airstream is used for cooling. When using this mode of changeover control, turn the enthalpy setpoint potentiometer fully clockwise to the D setting. (See Fig. 76.) Outdoor Enthalpy Changeover For enthalpy control, accessory enthalpy sensor (part number HH57AC078) is required.
CO2 SENSOR MAX RANGE SETTING EXH N1 P Min Pos T1 DCV 2V AQ SR+ 48TC SR + Max 10V 1 _ 2V 2 5 DCV SO+ SO 24 Vac COM Open T AQ1 24 Vac HOT 6000 Set 10V 2V EXH P1 TR1 RANGE CONFIGURATION (ppm) N TR DCV Set 10V Free Cool B C A D 3 EF Fig. 81 - EconoMi$er IV Control 5000 4000 800 ppm 900 ppm 1000 ppm 1100 ppm 3000 2000 1000 0 4 2 3 4 5 6 7 8 DAMPER VOLTAGE FOR MAX VENTILATION RATE EF1 C06039 Fig.
(TO x OA + (TR ) 100 x RA ) =TM 100 TO = Outdoor-Air Temperature OA = Percent of Outdoor Air TR = Return-Air Temperature RA = Percent of Return Air TM = Mixed-Air Temperature As an example, if local codes require 10% outdoor air during occupied conditions, outdoor-air temperature is 60_F, and return-air temperature is 75_F. (60 x .10) + (75 x .90) = 73.5_F 2. Disconnect the supply air sensor from terminals T and T1. 3. Ensure that the factory-installed jumper is in place across terminals P and P1.
48TC graph with the left side of the chart to determine that the range configuration for the CO2 sensor should be 1800 ppm. The EconoMi$er IV controller will output the 6.7 volts from the CO2 sensor to the actuator when the CO2 concentration in the space is at 1100 ppm. The DCV setpoint may be left at 2 volts since the CO2 sensor voltage will be ignored by the EconoMi$er IV controller until it rises above the 3.6 volt setting of the minimum position potentiometer.
To check single enthalpy: 1. Make sure EconoMi$er IV preparation procedure has been performed. 2. Set the enthalpy potentiometer to A (fully CCW). The Free Cool LED should be lit. 3. Set the enthalpy potentiometer to D (fully CW). The Free Cool LED should turn off. 4. Return EconoMi$er IV settings and wiring to normal after completing troubleshooting. DCV (Demand Controlled Ventilation) and Power Exhaust To check DCV and Power Exhaust: 1. Make sure EconoMi$er IV preparation procedure has been performed. 2.
48TC Fig.
Fig.
PRE--START--UP 48TC ! 4. Verify the following conditions: a. Make sure that condenser-- fan blade are correctly positioned in fan orifice. See Condenser-- Fan Adjustment section for more details. b. Make sure that air filter(s) is in place. c. Make sure that condensate drain trap is filled with water to ensure proper drainage. d. Make sure that all tools and miscellaneous loose parts have been removed.
1. Connect service gauges to suction and discharge pressure fittings. 2. Energize the compressor. 3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-- up. If the suction pressure does not drop and the discharge pressure does not rise to normal levels: 4. Note that the evaporator fan is probably also rotating in the wrong direction. 5. Turn off power to the unit and install lockout tag. 6. Reverse any two of the unit power leads. 7.
START--UP, PREMIERLINK CONTROLS 48TC ! WARNING subsequent resets to factory defaults if the switch is left at position 1. ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death. The unit must be electrically grounded in accordance with local codes and NEC ANSI/NFPA 70 (American National Standards Institute/National Fire Protection Association.
Configuration The RTU-- MP controller configuration points affect the unit operation and/or control. Review and understand the meaning and purpose of each configuration point before changing it from the factory default value. The submenus containing configuration points are as follows: Unit, Cooling, Heating, Inputs, Economizer, IAQ, Clock-- Set, and User Password (USERPW). Each configuration point is described below under its according submenu. See Form 48-- 50H-- T-- 2T, Appendix for display tables.
48TC Inputs NOTE: For installation of inputs and field installed accessories, refer to the appropriate sections. Input 3 This input is a discrete input and can be configured to be one of five different inputs: No Function, Compressor Safety, Fan Status, Filter Status, or Remote Occupancy. This input can also be configured to be either Normally Open (N/O) or Normally Closed (N/C). Input 3 is factory wired to pin J1-- 2. Field accessories get wired to its parallel pin J5-- 5.
Economizer Exists This point tells the controller if there is an economizer installed on the unit. Factory Default = NO if no economizer YES if there is an economizer installed Economizer Minimum Position This defines the lowest economizer position when the indoor fan is running and the building is occupied.
48TC During free cooling operation, a supply air temperature (SAT) above 50_F will cause the dampers to modulate between Minimum Position setpoint and 100% open. With SAT from 50_F to 45_F, the dampers will maintain at the Minimum Position setting. With SAT below 45_F, the outside air dampers will be closed. When SAT rises to 48_F, the dampers will re-- open to Minimum Position setting.
Routine No. 3: If the OAT > 68_F and the enthalpy is low and the OAT < SPT then the economizer will open to 100% and compressors 1 and 2 will be cycled based on Y1 and Y2 inputs respectively. If any of these conditions are not met the economizer will go to minimum position. If there is no call for heating or cooling, the economizer, if available, will maintain the SASP at 70_F. Heating — For gas or electric heat, HS1 and HS2 outputs will follow W1 and W2 inputs respectively.
48TC S If the PremierLink controller is in the occupied mode and ASHRAE 90.
A high humidity alarm will be generated if the indoor relative humidity exceeds the high humidity setpoint by the amount configured in the Control Humidity Hysteresis in the ALARMS table for 20 minutes. The alarm will return to normal when the indoor relative humidity drops 3% below the active humidity setpoint. Economizer — The economizer dampers are used to provide free cooling and indoor air quality if optional CO2 sensor is installed and when the outside conditions are suitable.
S SPT reading is available and < (OHSP + STO). S If it is unoccupied and the SPT < (UHSP - Unoccupied Heating Deadband). The indoor fan will be turn on by the staging algorithm. S an IAQ sensor is installed S the IAQ Minimum Damper Position > minimum damper position S and the SAT < SPT - 10_F. When all of the above conditions are met, the SHSR is calculated and up to 3 stages of heat will turned on and off to satisfy to maintain the SAT = SHSR.
If all of the above conditions are met, the economizer damper IQMP is temporarily overridden by the pre-- occupancy damper position (PURGEMP). The PURGEMP will be set to one of the following conditions based on atmospheric conditions and the space temperature: S If the OAT ≥ NTLO (Unoccupied OAT Lockout Temperature) and OAT < 65_F and OAT is less than or equal to OCSP and Enthalpy = Low then PURGEMP = 100%.
source for a 3V control system, the PremierLink controller is not required to be on the same CCN bus but it is recommended. Linkage will be active when it is initiated from the Linkage thermostat or the 3V Linkage Coordinator through CCN communications and requires no configuration. Only one device can be linked to the PremierLink controller.
BAS On/Off The Building Automation System is scheduling the unit via an On/Off command to the BAS ON/OFF software point. The Building Automation System can be speaking BACnet, Modbus, or N2 and is writing to the BAS On/Off point in the open protocol point map. NOTE: If the BAS supports NATIVE BACnet scheduling, then set the Occupancy Source to BACnet schedule. If the BAS is BACnet but does NOT support NATIVE BACnet scheduling, then set the Occupancy Source to BAS On/Off.
48TC the T56 slider offset). S Space Temperature reading is available. S If it is unoccupied and the SPT > (unoccupied cool setpoint plus the T56 slider offset). The indoor fan will be turned on by the staging algorithm. S If economizer is available and active and economizer open > 85% and SAT > (SAT low limit + 5_F) and SPT > effective setpoint + 0.5_F. OR Economizer is available, but not active OR Economizer is not available S OAT > DX Lockout temperature.
If the calculated IAQ minimum position is greater than the IAQ maximum damper position configuration then it will be clamped to the configured value. Demand Limit If the RTU-- MP receives a level 1 (one degree offset), 2 (two degree offset), or a 3 (4 degree offset) to the BACnet demand limit variable, the controller will expand the heating and cooling setpoints by the configured demand limit setpoint value and remain in effect until the BACnet demand limit variable receives a 0 value.
APPENDIX I.
APPENDIX II. PHYSICAL DATA 48TC*A05 48TC*A06 48TC*A07 1 / 1 / Scroll 5.6 25 Acutrol 630 / 505 54 / 117 1 / 1 / Scroll 8.5 42 Acutrol 630 / 505 54 / 117 1 / 1 / Scroll 10.7 42 Acutrol 630 / 505 54 / 117 1 / 1 / Scroll 14.1 56 Acutrol 630 / 505 54 / 117 Cu / Al 3/8” RTPF 2 / 15 5.5 3/4” Cu / Al 3/8” RTPF 2 / 15 5.5 3/4” Cu / Al 3/8” RTPF 4 / 15 5.5 3/4” Cu / Al 3/8” RTPF 4 / 15 7.
APPENDIX II. PHYSICAL DATA (cont.) 48TC*A08 48TC*A09 48TC*A12 1 / 1 / Scroll 13.75 60 Acutrol 630 / 505 54 / 117 1 / 1 / Scroll 15.25 85 Acutrol 630 / 505 54 / 117 1 / 1 / Scroll 20.0 110 Acutrol 630 / 505 54 / 117 Cu / Al 3/8” RTPF 3 / 15 8.9 3/4” Cu / Al 3/8” RTPF 3 / 15 11.1 3/4” Cu / Al 3/8” RTPF 4 / 15 11.1 3/4” Standard Static 3 phase Motor Qty / Drive Type Max BHP RPM Range Motor Frame Size Fan Qty / Type Fan Diameter (in) 1 / Belt 1.7 489--- 747 56 1 / Centrifugal 15 x 15 1 / Belt 1.
APPENDIX II. PHYSICAL DATA (cont.) Physical Data (Heating) 3 -- 6 TONS 48TC**04 48TC**05 48TC**06 48TC**07 Gas Connection # of Gas Valves 1 1 1 1 Connection size 1/2” NPT 1/2” NPT 1/2” NPT 1/2” NPT Nat. gas supply line press (in. w.g.)/(PSIG) 5--- 13 / 0.18--- 0.47 5--- 13 / 0.18--- 0.47 5--- 13 / 0.18--- 0.47 5--- 13 / 0.18--- 0.47 LP supply line press (in. w.g.)/(PSIG) 11--- 13 / 0.40--- 0.47 11--- 13 / 0.40--- 0.47 11--- 13 / 0.40--- 0.47 11--- 13 / 0.40--- 0.47 1st stage 0.
APPENDIX II. PHYSICAL DATA (cont.) Physical Data (Heating) 7.5 -- 10 TONS 48TC**04 48TC**05 48TC**06 48TC**07 1 4--- 13 / 0.18--- 0.47 11--- 13 / 0.40--- 0.47 1 4--- 13 / 0.18--- 0.47 11--- 13 / 0.40--- 0.47 1 4--- 13 / 0.18--- 0.47 11--- 13 / 0.40--- 0.47 1 4--- 13 / 0.18--- 0.47 11--- 13 / 0.40--- 0.47 0.14 0.14 0.14 0.14 0.14 0.14 0.14 0.
APPENDIX III. FAN PERFORMANCE General Fan Performance Notes: 48TC 1. Interpolation is permissible. Do not extrapolate. 2. External static pressure is the static pressure difference between the return duct and the supply duct plus the static pressure caused by any FIOPs or accessories. 3. Tabular data accounts for pressure loss due to clean filters, unit casing, and wet coils. Factory options and accessories may add static pressure losses. 4. The Fan Performance tables offer motor/drive recommendations.
APPENDIX III. FAN PERFORMANCE (cont.) 48TC**04 CFM 48TC 900 975 1050 1125 1200 1275 1350 1425 1500 CFM 900 975 1050 1125 1200 1275 1350 1425 1500 1 Phase 3 Ton Horizontal Supply 0.2 RPM BHP Field---Supplied Drive1 553 0.14 575 0.16 597 0.18 620 0.21 643 0.23 667 0.27 691 0.30 715 0.34 740 0.38 1.2 RPM BHP 1019 1036 1053 1071 1089 1107 1126 1144 1163 0.64 0.69 0.74 0.79 0.84 0.90 0.96 1.03 1.10 RPM 681 700 720 741 762 783 805 827 849 AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.8 1.
APPENDIX III. FAN PERFORMANCE (cont.) CFM 900 975 1050 1125 1200 1275 1350 1425 1500 CFM 900 975 1050 1125 1200 1275 1350 1425 1500 3 Phase 0.2 RPM BHP Field---Supplied Drive1 553 0.14 575 0.16 597 0.18 620 0.21 643 0.23 667 0.27 691 0.30 715 0.34 740 0.38 1.2 RPM BHP 1019 1036 1053 1071 1089 1107 1126 1144 1163 0.64 0.69 0.74 0.79 0.84 0.90 0.96 1.03 1.10 3 Ton Horizontal Supply AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.8 1.
APPENDIX III. FAN PERFORMANCE (cont.) 48TC**05 CFM 48TC 1200 1300 1400 1500 1600 1700 1800 1900 2000 CFM 1200 1300 1400 1500 1600 1700 1800 1900 2000 1 Phase 4 Ton Horizontal Supply AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.8 BHP RPM BHP RPM BHP RPM BHP Standard Static Option Medium Static Option 0.23 762 0.34 859 0.46 944 0.58 0.28 790 0.40 886 0.52 969 0.65 0.33 819 0.45 913 0.58 996 0.72 0.38 849 0.52 941 0.66 1023 0.80 0.45 879 0.59 970 0.73 1050 0.88 0.52 910 0.67 999 0.82 1078 0.
APPENDIX III. FAN PERFORMANCE (cont.) CFM 1200 1300 1400 1500 1600 1700 1800 1900 2000 CFM 1200 1300 1400 1500 1600 1700 1800 1900 2000 3 Phase 4 Ton Horizontal Supply AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.8 BHP RPM BHP RPM BHP RPM BHP Standard Static Option Medium Static Option 0.23 762 0.34 859 0.46 944 0.58 0.28 790 0.40 886 0.52 969 0.65 0.33 819 0.45 913 0.58 996 0.72 0.38 849 0.52 941 0.66 1023 0.80 0.45 879 0.59 970 0.73 1050 0.88 0.52 910 0.67 999 0.82 1078 0.98 0.59 942 0.
APPENDIX III. FAN PERFORMANCE (cont.) 48TC**06 CFM 48TC 1500 1625 1750 1875 2000 2125 2250 2375 2500 CFM 1500 1625 1750 1875 2000 2125 2250 2375 2500 1 Phase 5 Ton Horizontal Supply 0.2 RPM BHP RPM 800 849 899 950 1001 1053 1106 1159 --- 0.39 0.48 0.59 0.70 0.84 0.99 1.16 1.34 --- 904 947 992 1038 1085 1133 1182 1231 --- 1.2 RPM BHP RPM 1247 1276 1308 1342 ----------- 0.98 1.10 1.22 1.37 ----------- 1320 1348 1377 ------------- AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.
APPENDIX III. FAN PERFORMANCE (cont.) CFM 1500 1625 1750 1875 2000 2125 2250 2375 2500 CFM 1500 1625 1750 1875 2000 2125 2250 2375 2500 3 Phase 5 Ton Horizontal Supply 0.2 RPM BHP RPM 800 849 899 950 1001 1053 1106 1159 1212 0.39 0.48 0.59 0.70 0.84 0.99 1.16 1.34 1.55 904 947 992 1038 1085 1133 1182 1231 1281 1.2 RPM BHP RPM 1247 1276 1308 1342 1377 1414 1452 1492 1533 0.98 1.10 1.22 1.37 1.53 1.71 1.91 2.12 2.
APPENDIX III. FAN PERFORMANCE (cont.) 48TC**07 CFM 48TC 1800 1950 2100 2250 2400 2550 2700 2850 3000 CFM 1800 1950 2100 2250 2400 2550 2700 2850 3000 3 Phase 6 Ton Horizontal Supply 0.2 RPM BHP Field---Supplied Drive1 913 0.64 972 0.78 1032 0.95 1093 1.14 1155 1.36 1217 1.60 1280 1.87 1343 2.17 1406 2.50 RPM 1010 1065 1120 1177 1234 1293 1352 1412 1472 1.2 RPM BHP RPM 1322 1366 1411 1457 1505 1554 1604 1656 --- 1.56 1.75 1.97 2.21 2.48 2.78 3.10 3.
APPENDIX III. FAN PERFORMANCE (cont.) CFM 2250 2438 2625 2813 3000 3188 3375 3563 3750 CFM 2250 2438 2625 2813 3000 3188 3375 3563 3750 3 PHASE 7.5 TON HORIZONTAL SUPPLY 0.2 RPM BHP RPM 505 533 562 591 621 652 682 713 745 0.52 0.62 0.74 0.88 1.03 1.21 1.40 1.61 1.85 586 610 635 661 688 715 743 772 801 1.2 RPM BHP 838 854 872 890 910 930 951 973 996 1.81 1.96 2.12 2.31 2.51 2.74 2.99 3.26 3.55 AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.8 BHP RPM BHP RPM Standard Static Option 0.
FAN PERFORMANCE (cont.) 48TC**09 CFM 48TC 2550 2763 2975 3188 3400 3613 3825 4038 4250 CFM 2550 2763 2975 3188 3400 3613 3825 4038 4250 3 PHASE 8.5 TON HORIZONTAL SUPPLY 0.2 RPM BHP Field---Supplied Drive1 497 0.48 524 0.58 551 0.70 580 0.84 609 1.00 638 1.17 668 1.37 698 1.59 728 1.83 1.2 RPM BHP 833 849 865 883 902 921 941 963 984 1.21 1.36 1.52 1.70 1.90 2.13 2.37 2.63 2.92 RPM 579 602 626 651 677 703 730 758 786 AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.
FAN PERFORMANCE (cont.) CFM 3000 3250 3500 3750 4000 4250 4500 4750 5000 CFM 3000 3250 3500 3750 4000 4250 4500 4750 5000 3 PHASE 10 TON HORIZONTAL SUPPLY 0.2 RPM BHP Field---Supplied Drive1 579 0.70 613 0.85 648 1.03 683 1.23 719 1.45 756 1.71 792 1.99 830 2.31 867 2.66 RPM 660 690 721 753 786 819 853 888 923 1.2 RPM BHP RPM 917 938 961 985 1011 1037 1064 1091 1120 1.70 1.93 2.18 2.46 2.76 3.09 3.46 3.85 4.28 970 991 1013 1035 1059 1084 1110 1137 1164 AVAILABLE EXTERNAL STATIC PRESSURE (in.
APPENDIX III. FAN PERFORMANCE (cont.) Pulley Adjustment 1 phase 3 phase 05 3 phase 3 phase 3 phase 3 phase 3 phase 06 07 08 09 12 48TC 1 phase 3 phase 04 1 phase UNIT MOTOR/DRIVE COMBO 0.0 0.5 1.0 MOTOR PULLEY TURNS OPEN 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.
APPENDIX IV. ELECTRICAL DATA 3 TONS V ---Ph---Hz VOLTAGE RANGE MIN MAX 208--- 1--- 60 187 230--- 1--- 60 COMP (ea) OFM (ea) RLA LRA WATTS FLA 253 16.6 79 325 1.5 187 253 16.6 79 325 1.5 208--- 3--- 60 187 253 10.4 73 325 1.5 230--- 3--- 60 187 253 10.4 73 325 1.5 460--- 3--- 60 414 506 5.8 38 325 0.8 575--- 3--- 60 518 633 3.8 37 325 0.
APPENDIX IV. ELECTRICAL DATA (cont.) 48TC 48TC**06 5 TONS V ---Ph---Hz VOLTAGE RANGE MIN MAX 208--- 1--- 60 187 230--- 1--- 60 COMP (ea) OFM (ea) RLA LRA WATTS FLA 253 26.2 134 325 1.5 187 253 26.2 134 325 1.5 208--- 3--- 60 187 253 15.6 110 325 1.5 230--- 3--- 60 187 253 15.6 110 325 1.5 460--- 3--- 60 414 506 7.7 52 325 0.8 575--- 3--- 60 518 633 5.8 39 325 0.
APPENDIX IV. ELECTRICAL DATA (cont.) V ---Ph---Hz 7.5 TONS VOLTAGE RANGE COMP (ea) OFM (ea) RLA LRA WATTS FLA MIN MAX 208--- 3--- 60 187 253 25.0 164 325 1.5 230--- 3--- 60 187 253 25.0 164 325 1.5 460--- 3--- 60 414 506 12.2 100 325 0.8 575--- 3--- 60 518 633 9.0 78 325 0.
APPENDIX IV. ELECTRICAL DATA (cont.) UNIT MCA/MOCP DETERMINATION NO C.O. OR UNPWRD C.O. NOM.
APPENDIX IV. ELECTRICAL DATA (cont.) UNIT NOM. V ---Ph---Hz IFM TYPE 48TC**08 208/230--- 3--- 60 460--- 3--- 60 575--- 3--- 60 48TC**09 208/230--- 3--- 60 460--- 3--- 60 575--- 3--- 60 48TC**12 208/230--- 3--- 60 460--- 3--- 60 575--- 3--- 60 1Fuse STD MED HIGH STD MED HIGH STD MED HIGH STD MED HIGH STD MED HIGH STD MED HIGH STD MED HIGH STD MED HIGH STD MED HIGH COMBUSTION FAN MOTOR FLA POWER EXHAUST FLA 0.48 3.8 0.25 1.8 0.24 3.8 0.48 3.8 0.25 1.8 0.24 3.8 0.48 3.8 0.
APPENDIX V. WIRING DIAGRAM LIST Wiring Diagrams All VOLTAGE 208/230---1---60 208/230---3---60 460---3---60 575---3---60 208/230---1---60 208/230---3---60 460---3---60 575---3---60 208/230---1---60 208/230---3---60 460---3---60 575---3---60 208/230---3---60 460---3---60 575---3---60 208/230---3---60 460---3---60 575---3---60 208/230---3---60 460---3---60 575---3---60 208/230---3---60 460---3---60 575---3---60 PremierLink* 48TC_A CONTROL 48TM500213.04 48TM500213.04 48TM500213.04 48TM500213.04 48TM500213.
48TC APPENDIX VI. MOTORMASTER SENSOR LOCATIONS Fig. 85 - 48TC*A04 Outdoor Circuiting Fig. 86 - 48TC*A05/06 Outdoor Circuiting C08259 Fig. 87 - 48TC*A07 Outdoor Circuiting C08260 Fig.
48TC APPENDIX VI. (cont.) MOTORMASTER SENSOR LOCATIONS Fig. 89 - 48TC*A09/12 Outdoor Circuiting Copyright 2008 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 08/08 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
UNIT START-UP CHECKLIST I. PRELIMINARY INFORMATION: MODEL NO.
