- Data Brochure D 363 Universal Reset Control 363 12/08 The Universal Reset Control 363 is a microprocessor based control designed to maximize the comfort and efficiency provided by a hydronic heating system. The control automatically adjusts the boiler and mixed loop water temperatures that are delivered to the heating system by using outdoor reset. For a mixing device, the 363 can use a variable speed driven wet-rotor circulator or a floating action driven mixing valve.
User Interface How To Use The Data Brochure This brochure is organized into four main sections. They are: 1) Sequence of Operation, 2) Installation, 3) Control Settings, and 4) Troubleshooting. The Sequence of Operation section has five sub sections. We recommend reading Section A: General of the Sequence of Operation, as this contains important information on the overall operation of the control. Then read the sub sections that apply to your installation.
Display Item Field Number Field Displays an abbreviated name of the selected item Menu Field Displays the current menu Displays the current value of the selected item View Adjust Monitor Schd Misc Open Close °F °C min hr sec UnOcc Ovr Aux 12 DHW % 1 ! Mix Demand Boiler Demand DHW Demand Setpoint Demand WWSD Minimum Maximum Status Field Displays the current status of the control’s inputs, outputs and operation { Menu Buttons Selects Menus, Items and adjusts settings Item Symbol Description
Sequence of Operation Section A Section B Page 4 - 6 Page 6 - 8 General Operation Boiler Reset Section C Domestic Hot Water/Setpoint Page 9 - 11 Section D Section E Page 12 - 15 Page 15 -16 Mixing Reset Storage Section A —General Operation POWERING UP THE CONTROL When the Universal Reset Control 363 is powered up, the control displays the control type number in the LCD for 2 seconds. Next, the software version is displayed for 2 seconds.
Fin–tube Convector (CONV) A convector terminal unit is made up of a heating element with fins on it. This type of terminal unit relies on the natural convection of air across the heating element to deliver heated air into the space. The amount of natural convection is dependant on the supply water temperature to the heating element and the room air temperature. Radiator (RAD) CONV A radiator terminal unit has a large heated surface that is exposed to the room.
SOFT START (SOF STRT) The SOF STRT function allows the 363 to slowly ramp the water temperature up to the required supply temperature. By allowing the temperature in the system to be adjusted slowly, the control reduces any thermal expansion noises and stresses that may be caused by a quick change in supply water temperature. WARM WEATHER SHUT DOWN (WWSD) When the outdoor air temperature rises above the WWSD setting, the 363 turns on the WWSD pointer in the display.
BOILER DESIGN (Boil DSGN) (RESETRATIO&CHARACTERIZEDHEATINGCURVE) The Boil DSGN temperature is the supply water temperature required to heat the boiler zones when the outdoor air is as cold as the Outdoor Design temperature. BOILER MINIMUM (Boil MIN) (RESET RATIO & CHARACTERIZED HEATING CURVE) Boil Min + 1/2 Boiler Differential The Boil MIN is the lowest water temperature that the control is allowed to use as a boiler target (Boil TRG) temperature.
DIFFERENTIAL (Boil DIFF) An on / off heat source such as a boiler must be operated with a differential to prevent short cycling. This differential is centered around the Boil TRG temperature. If the boiler supply temperature drops 1/2 of the differential setting below the Boil TRG temperature, the 363 closes the boiler contact to fire the boiler. If the boiler supply temperature rises 1/2 of the differential setting above the Boil TRG temperature, the 363 opens the boiler contact to turn off the boiler.
Section C —Domestic Hot Water (DHW) and Setpoint Section C1 Domestic Hot Water (DHW) Section C2 DHW Priority Section C3 DHW with Low Temperature Boilers Section C4 Setpoint Section C1 —Domestic Hot Water (DHW) DHW DEMAND A DHW demand is generated on the 363 by one of two methods: either an external DHW demand from an aquastat or an internal demand from a tekmar sensor.
External Demand (Aquastat) If an external DHW Demand is used, the control can either continue operation of the DHW system as it would during the Occupied period or the control can ignore a call for DHW as long as the control is in an UnOccupied mode. Internal Demand (Sensor) If an internal DHW Demand is used, a DHW TANK Unocc temperature can be set.
If DHW is to be incorporated into a low temperature system such as a radiant heating system, a mixing device is often installed to isolate the high DHW supply temperature from the lower system supply temperature. If a mixing device is not installed, high temperature water could be supplied to the low temperature system while trying to satisfy the DHW demand. This may result in damage to the low temperature heating system.
Section D —Mixing Reset Section D1 General Mixing Operation Section D2 Mixing Device Section D3 Alternate Mixing Demands Section D1—General Mixing Operation MIXING DEMAND 1 2 Mix Demand 24 to 240 V (ac) MIXING START (MIX STRT) (RESET RATIO) The MIX STRT temperature is the mixing supply water temperature that the heating system requires when the outdoor air temperature equals the OUT STRT air temperature.
MIXING SETBACK (MIX SETB) (RESET RATIO) 210 MIX MAX (99) MIX DSGN 190 (88) 170 (77) 150 (66) MIXING INDOOR (MIX INDR) (CHARACTERIZED HEATING CURVE) The MIX INDR is the room temperature used in the original heat loss calculations for the building. This setting establishes the beginning of the Characterized Heating Curve for the mixing zones. This single setting replaces the MIX STRT water temperature and OUT STRT air temperature settings used by the Reset Ratio.
VARIABLE SPEED INJECTION (MIXING = VAR) A standard wet rotor circulator is connected to the 363 on the Cls / Var terminal (16). The 363 increases or decreases the power output to the circulator when there is a Mix Demand. The circulator speed varies to maintain the correct mixed supply water temperature at the mix sensor. For correct sizing and piping of the variable speed injection driven circulator, refer to essay E 021.
ROOM TEMPERATURE UNIT (RTU) 062, 063 If the mixing system consists of a single zone, temperature control of that zone can be provided by using an RTU. The RTU is connected to the Com and tekmar NetTM tN1/tN2 terminals (17 and 19). In addition, power must be applied to the Mix Demand terminals (1 and 2) as described in Section D1. With the RTU connected, the 363 measures the actual room temperature. With this information, the 363 provides a constant water flow through the mixing system.
Section E3 —Without a Tank Sensor The 363 is capable of operating the storage tank system without a storage tank sensor. In this situation, once the 363 receives a Mixing Demand the control begins operation by trying to satisfy the system using the storage tank. If the storage tank’s injection pump runs at a high percentage of output and is still unable to satisfy the system, the 363 switches to the boiler’s variable speed injection pump.
• If a tekmar Zone Control is used, run the wires from the Zone Control to the 363. Refer to the instructions supplied with the Zone Control. • Run wire from other system components (pumps, boiler, actuator motors, etc.) to the control. • Run wires from the 120 V (ac) power to the control. Use a clean power source to ensure proper operation. Multi-strand 16 AWG wire is recommended for all 120 V (ac) wiring due to its superior flexibility and ease of installation into the terminals.
Variable Speed Injection Pump The 363 can vary the speed of a permanent capacitor, impedance protected or equivalent pump motor that has a locked rotor current of less than 2.4 A. Most small wet rotor circulators are suitable as described in Essay E 021. The 363 has an internal overload protection fuse which is rated at 2.5 A 250 V (ac). Contact your tekmar sales representative for details on the repair procedure if this fuse is blown.
Zone Control tekmar 363 Zone Control Input 20 21 Com 10K 1 If an external tekmar Zone Control is used, connect the wire from the Com Sen terminal on the Zone Control to the Com terminal (20) on the 363. Connect the Zo Out terminal on the Zone Control to the 10K 1 terminal (21) on the 363. Zo Out Com Sen Note: The wires from the Zone Control are polarity sensitive. The communication does not operate correctly if the wires are reversed.
Boiler Demand If a Boiler Demand is used, measure the voltage between the Boil Dem and the Com Dem terminals (4 and 3). When the Boiler Demand device calls for heat, you should measure between 20 and 260 V (ac) at the terminals. When the Boiler Demand device is off, you should measure less than 5 V (ac). 3 4 Com Boil Dem Dem V 20 to 260 V (ac) Ω V DHW Demand If a DHW Demand is used, measure the voltage between the Setp / DHW and the Com Dem terminals (5 and 3).
Variable Speed Injection Pump (Storage) If the storage feature is used in the control, the two variable speed injection pumps must be wired as shown in the wiring section. To test that the wiring is done correctly, make sure the power to the terminal block is off. Install a jumper between the Pwr Mix and Cls / Var terminals (14 and 16). When the variable speed pump circuit is powered up, the boiler’s variable speed pump should operate at full speed.
DIP Switch Settings The DIP Switch settings on the control are very important and should be set to the appropriate settings prior to making any adjustments to the control through the User Interface. The DIP switch settings change the items that are available to be viewed and / or adjusted in the User Interface. If a DIP switch is changed while the control is powered up, the control responds to the change in setting by returning the display to the View menu.
363 View Menu (1 of 1) Access Level Description Range Se c ti LT on D US ER IN ST AD V Item Field •••• D3 D3 D3 B2 ••• Current outdoor air temperature as measured by the outdoor sensor. This is the default display for the control. Target room air temperature. “– – –” denotes no heat is required. -67 to 149˚F (-55 to 65˚C) - - -, 35 to 100˚F (2 to 38˚C) 10K 1 = INDR •••• Measured room air temperature at the indoor sensor.
363 Adjust Menu (1 of 5) Access Level Description Range Se ct i LT on D US ER IN ST AD V Item Field D1 Occ D1 UnOcc D3 B2 B2 •••• The desired room air temperature during an Occupied period for mixing zone(s). Note: There is only a ±3°F adjustment in the LTD access level. DIP switch = Characterized Heating Curve No RTU connected ••• The desired room air temperature during an UnOccupied period for mixing zone(s).
363 Adjust Menu (2 of 5) Access Level Description Range Se c ti LT on D US ER IN ST AD V Item Field D1 D1 D1 D1 B1 D1 D1 D2 •• •• •• The design indoor air temperature used in the heat loss calculation for the mixing system. 35 to 100˚F (2 to 38˚C) DIP switch = Characterized Heating Curve Default =70°F (21°C) The starting water temperature used in the reset ratio calculation for the mixed supply.
363 Adjust Menu (3 of 5) Access Level Description Range Se c ti LT on D US ER IN ST AD V Item Field B1 Occ •••• The desired room air temperature during an Occupied period for the boiler zone(s). Note: There is only a ±3°F adjustment in the LTD access level. DIP switch = Characterized Heating Curve B1 UnOcc ••• 35 to 100˚F (2 to 38˚C) Default = 70°F (21°C) The desired room air temperature during an UnOccupied period for boiler zone(s).
363 Adjust Menu (4 of 5) Access Level Description Range Se c ti LT on D US ER IN ST AD V Item Field B1 B1 B1 C1 C1 Occ C1 UnOcc C1 Occ C1 UnOcc C2 C4 Occ •• The time delay the control can expect between the time the boiler contact closes and the burner fires. •• The thermal mass characteristics of the boiler that is being used. •• The differential that the control is to use when it is operating the boiler. •• ••• ••• •• •• •• •• Actual Setting 0:00 to 3:00 min (1 sec.
363 Adjust Menu (5 of 5) Access Level Description Range Se ct i LT on D U SE R IN ST AD V Item Field •• C4 UnOcc •• C4 ••• A Occ ••• A UnOcc Selects whether or not a setpoint demand will be responded to during the UnOccupied period. DIP switch = Setback 10K 2 = DHW, OR DHW THRU = NONE Default = OFF NONE, B+M (Boiler + Mixing) 10K 2 = DHW, OR DHW THRU = NONE Default = NONE The system’s warm weather shut down during the UnOccupied period.
363 Misc (Miscellaneous) Menu (1 of 1) Access Level Description Range US E IN R ST AD V LT D Item Field ••• ••• •••• The units of measure that all of the temperatures are to be displayed in by the control. The operating mode for the back lighting on the LCD as well as the time of keypad inactivity until the control automatically returns to the default display.
363 RTU Adjust Menu (1 of 1) Occ UnOcc Se ct LT ion D US E IN R ST AD V R TU R 06 TU 2 06 3 Item Field Access Level B1 D1 •••••• B1 D1 •••••• A D3 35 to 100˚F (2 to 38˚C) Default = 70°F (21°C) 35 to 100˚F (2 to 38˚C) Default = 65°F (18°C) The amount of morning boost. OFF, 0:20 to 8:00 hr DIP switch = Setback Default = OFF •••• •••• Selects whether the RTU is to use its internal air sensor. •• • This item allows for remotely adding a 10K sensor to the RTU.
363 RTU Schd (Schedule) Menu (1 of 1) A ••••• Range Description Se ct LT ion D US E IN R ST AD V R TU R 06 TU 2 06 3 Item Field Access Level NONE, TMPY Occ Ovr, PERM Occ Ovr, TMPY UnOcc Ovr, PERM UnOcc Ovr, AWAY Ovr The type of setback override that is in effect.
Step 4 - The mixing pump (Mix P2) is turned on for 10 seconds and then shuts off. NOTE: Only if there is a mixing demand can the control be paused in step 4. Step 5 - The boiler pump (Pump P1) is turned on and remains on. NOTE: Only if there is a boiler demand can the control be paused in step 5. Step 6 - The Boiler contact is turned on for 10 seconds. After 10 seconds, the Boiler and Boil P1 contacts are shut off. NOTE: Only if there is a boiler demand can the control be paused in step 6.
Sketch the Piping in the System Sketch the piping of the system. This is a relatively simple step that tends to be overlooked, however it can often save hours of time in troubleshooting a system. Note flow directions in the system paying close attention to the location of pumps, check valves, pressure bypass valves and mixing valves. Ensure correct flow direction on all pumps. This is also a very useful step if additional assistance is required in diagnosing a consistent problem.
363 Monitor Menu (2 of 3) Note: To clear the recorded information in the specific Item field, press and hold Access Level . Description Range LT D US E IN R ST AD V Item Field and ••• The highest temperature recorded at the boiler sensor since this item was last cleared. 0 to 255˚F (-18 to 124˚C) ••• The lowest temperature recorded at the boiler sensor since this item was last cleared.
363 Monitor Menu (3 of 3) Note: To clear the recorded information in the specific Item field, press and hold and . Description Range U LT D Item Field SE IN R ST AD V Access Level • The number of times that the microprocessor in the control has had to reset itself since this item was last cleared. The control will reset itself if it has experienced some form of interference that has disrupted its operation.
3 Error Messages (2 of 4) Error Displayed Description of Error The RTU was unable to read a piece of information stored in the Adjust menu. Because of this, the control was required to load the factory settings into all of the items in the Adjust menu. The control will operate based on only the Characterized Heating Curve settings until all of the items available in the Adjust menu of the RTU have been checked by the user or installer. Note: Access level must be ADV in order to clear the error.
363 Error Messages (3 of 4) Error Displayed Description of Error The control is no longer able to read the Boiler Supply sensor due to an open circuit. If the Boiler Minimum setting is higher than 100˚F (38˚C) the control will close the boiler contact when there is a call for heat in the system and the boiler temperature will be controlled by the boiler’s operating aquastat. If the Boiler Minimum setting is lower than 100˚F (38˚C) the control will not operate the boiler contact.
363 Error Messages (4 of 4) Error Displayed Description of Error The Remote Sensor 3 attached to the RTU is being read as an open circuit. The RTU will continue operation using all remaining sensors. If all of the sensors are unavailable, the control will continue to operate as if the RTU was not connected to the control. This error message can be cleared once the sensor has been repaired. Locate and repair the problem as described in the Data Brochure D 070.
Notes 39 of 40 Copyright © D 363 -12/08
Technical Data Universal Reset Control 363 Mixing, Boiler & DHW Power supply Relays Var. Pump Demands Sensors included — — — — — Optional devices — D 363, A 363’s, D 001, D 070, E 003, E 021, U 363. Microprocessor PID control; This is not a safety (limit) control. 3.9 lb.
