Tekmar Universal Reset Control 363 Data Brochure
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Tekmar Universal Reset Control 363 Data Brochure

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- Data Brochure
Universal Reset Control 363
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. The 363 is capable of controlling an indirect Domestic Hot Water (DHW) storage tank and / or a setpoint load. The temperature of
individual zones can be controlled by connecting a conventional thermostat system or a tekmar Zone Control to the 363.
The 363 control includes a large Liquid Crystal Display (LCD) in order to view system status and operating information. The LCD and user
key pad are used to set the control's adjustment and to monitor pump and boiler running hours, DHW tank temperatures, outdoor and
system high and low temperatures, boiler firing cycles, plus many other useful items.
Several energy saving features have been incorporated into the 363 such as Warm Weather Shut Down (WWSD), DHW post purge,
system setback, DHW priority, Morning Boost, Soft Start and an automatic differential for boiler control. The 363 also has a unique feature
that allows the control to supply heat to the mixed system from either the boiler or a thermal storage tank.
Universal Reset Control 363
Mixing, Boiler & DHW
1
Mix
Demand
Input
Mix Demand
signal
Input
Boiler
Demand
signal
Input
Setpoint or
DHW
Demand
signal
Input
120 V (ac)
Power
Supply
Output
Boiler System
Pump
M
Output
Output
DHW Pump OR
Mixed System
DHW Valve
Pump
View
° F
UnOc
Open
1
2
%
DHW
1
Menu
Item
6
7
8
11
2
3
4
5
9
10
Com
Boil
Setp/
Power
Boil
DHW
Mix
Dem
Dem
DHW
N
L
P1
Pmp / Vlv
P2
OR
Output
Var. Speed
Output
Driven Pump
Boiler
Setback
Mix Demand
Boiler Demand
None
DHW Demand
Setpoint Demand
WWSD
Minimum
Maximum
Made in Canada by
tekmar Control Systems Ltd.
R
120 V ±10% 50/60 Hz 2000 VA
Power
Relays
240 V (ac) 7.5 A 1/3 hp, pilot duty 240 VA
Var. Pump
240 V (ac) 2.4 A 1/6 hp, fuse T2.5 A 250V
C
US
Demands
20 to 260 V (ac) 2 VA
LR 58223
Signal wiring must be rated at least 300 V.
Do not apply power
18
19
20
12
13
14
15
16
17
Boiler
Pwr
Opn Cls/
Com
10K
tN1/
Com
Mix
Var
2
tN2
M
Input
Output
Universal
Mixing Valve &
Sensor
Actuating Motor
(optional)
1 of 40
Reset Ratio
Characterized
Heating Curve
T est
off
not testing
red
testing
red
testing paused
For maximum heat,
press and hold Test
button for 3 seconds.
21
22 23
24
25
26
10K
UnO
Com
Mix
Boil
Out
1
Sw
Input
Universal
Sensor Included
Input
Universal
Sensor Included
T I M E
1
PRGM
S
OR
Vie
Vie
° F
° F
OR
WWS
WWS
%
%
%
%
1
2
1
2
!
!
OR
Menu
Item
Menu
Item
Input (MIX)
Input
Room
Remote
Temperature
Display
Unit (RTU)
Module (RDM)
Copyright © D 363 -06/99
D 363
06/99
Input
Outdoor
Sensor Included
Input
AMPM
2
UNOCC
OVR
M
T
W T F
S
tekmar
Timer
Input (MIX)
tekmar Slab
Sensor
Input (MIX)
tekmar Indoor
Sensor
70
Input
(BOIL
or MIX)
LR 58233 E150539
tekmar Zone
Control

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Summary of Contents for Tekmar Universal Reset Control 363

  • Page 1 06/99 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.

  • Page 2: Table Of Contents

    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.

  • Page 3: Description Of Display Elements

    Display Item Field Number Field Displays an abbreviated Displays the current value name of the selected item of the selected item Mix Demand View Adjust Boiler Demand Monitor ° F ° C Menu Field DHW Demand Displays the Schd Setpoint Demand current menu Misc UnOcc...

  • Page 4: Sequence Of 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. Finally, the control enters into the normal operating mode and the LCD defaults to displaying the current outdoor air temperature.
  • Page 5 This Boil TRG (Occupied) setting is only available if a Characterized Heating Curve is selected; It is not available for a Reset Ratio , and not needed or available if a tekmar Zone Boil TRG (UnOccupied) Control is used.

  • Page 6: Section B: Boiler Reset

    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.
  • Page 7 BOILER DESIGN (Boil DSGN) ( & RESET RATIO CHARACTERIZED HEATING CURVE 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) &...
  • Page 8 The 10K 1 item selects the type of device to be connected. Set the 10K 1 Zone Control 363 Control item to Boil to add a tekmar Zone control to the boiler loop. Control of Occupied Power View Mix Demand...

  • Page 9: Section C: Dhw / Setpoint

    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 (10K 2 = NONE) The 363 registers an external demand for DHW when a voltage between 24 and 240 V (ac) is applied across the Setp/DHW and the Com Dem terminals (5 and 3).
  • Page 10 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) ...
  • Page 11 Section C3 —DHW with Low Temperature Boilers (without Mixing) 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.

  • Page 12: Section D: Mixing Reset

    Section D —Mixing Reset Section D1 Section D3 Section D2 General Mixing Alternate Mixing Mixing Device Operation Demands Section D1—General Mixing Operation MIXING DEMAND A mixing demand is generated by applying a voltage between 24 and 240 V (ac) across the Mix Demand terminals (1 and 2). Once voltage is applied, the Mix Demand pointer is displayed in the LCD.
  • Page 13 MIXING SETBACK (MIX SETB) RESET RATIO The MIX SETB is the amount that the mixing supply water temperature is (99) MIX MAX reduced when the 363 is placed into an UnOccupied mode, using an Mixing Characterized MIX DSGN internal or an external setback as described in Section A. This setting is only (88) Heating Curve available if the Reset Ratio DIP switch is selected and Setback/None DIP...
  • Page 14 Zone Control 363 Control Set the 10K 1 item to MIX to add indoor temperature feedback control of multiple mixing zones. Control of mixing zones is provided by connecting a tekmar zone control to the 363. The zone Occupied Power...

  • Page 15: Section E: Storage

    If the mixing system consists of a single zone, temperature control of that zone can be provided tekmar tekmar by using an RTU. The RTU is connected to the Com and tekmar Net tN1/tN2 terminals (17 363 Control and 19). In addition, power must be applied to the Mix Demand terminals (1 and 2) as...

  • Page 16: Installation

    STEP ONE GETTING READY Check the contents of this package. If any of the contents listed are missing or damaged, please contact your wholesaler or tekmar sales representative for assistance. Type 363 includes: One Universal Reset Control 363, One Outdoor Sensor 070, Two Universal Sensors 071...

  • Page 17: Electrical Connections

    • 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.
  • Page 18 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.

  • Page 19: Testing The Wiring

    Zone Control Input tekmar 363 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.
  • Page 20 Boiler Demand If a Boiler Demand is used, measure the voltage between the Boil Dem 20 to 260 V (ac) 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.
  • Page 21 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).

  • Page 22: Dip Switch Settings

    When the padlock is closed, the access level cannot be changed. To change the access level, set the DIP switch to the Unlocked , or down position. The current access level of the control or tekmar Net (tN1 / tN2) device is viewed in its Miscellaneous (Misc) menu.

  • Page 23: Control Settings

    • • • (-50 to 75˚C) 10K 1 = INDR This is the signal that is being received from a tekmar Zone • - - -, 35 to 110˚F Control that is operating mixing zones. (2 to 43˚C) 10K 1 = MIX This is the signal that is being received from a tekmar Zone •...

  • Page 24: Adjust Menu

    363 Adjust Menu (1 of 5) Access Level Item Field Description Range Actual Setting The desired room air temperature during an 35 to 100˚F Occupied period for mixing zone(s). Note: There • • • • (2 to 38˚C) is only a ±3°F adjustment in the LTD access level. DIP switch = Characterized Heating Curve Default = 70°F (21°C) No RTU connected...
  • Page 25 363 Adjust Menu (2 of 5) Access Level Item Field Description Range Actual Setting 35 to 100˚F The design indoor air temperature used in the • • (2 to 38˚C) heat loss calculation for the mixing system. DIP switch = Characterized Heating Curve Default =70°F (21°C) 35 to 150˚F The starting water temperature used in the reset...
  • Page 26 363 Adjust Menu (3 of 5) Access Level Item Field Description Range The desired room air temperature during an 35 to 100˚F Occupied period for the boiler zone(s). Note: There • • • • (2 to 38˚C) is only a ±3°F adjustment in the LTD access level. Default = 70°F (21°C) DIP switch = Characterized Heating Curve The desired room air temperature during an...
  • Page 27 363 Adjust Menu (4 of 5) Access Level Item Field Description Range Actual Setting 0:00 to 3:00 min • • (1 sec. increments) The time delay the control can expect between the time the boiler contact closes and the burner fires. Default = 0:10 min LITE, MED, HEVY •...

  • Page 28: Schedule Menu

    363 Adjust Menu (5 of 5) Access Level Item Field Description Range Actual Setting Selects whether or not a setpoint demand will be OFF, SETPOINT Occ responded to during the UnOccupied period. • • DIP switch = Setback Default = OFF 10K 2 = DHW, OR UnOcc DHW THRU = NONE...

  • Page 29: Miscellaneous Menu

    DIP switch = Unlock Default = INST Room Temperature Units (RTUs) 062 and 063 A single RTU may be connected to the Universal Reset Control 363 in order to provide the control with View ° F indoor temperature feedback for the mixing side of the heating system (Refer to Essay E 002). When using...
  • Page 30 363 RTU Adjust Menu (1 of 1) Access Actual Level Item Field Description Range Setting The desired room air temperature during an 35 to 100˚F Occupied period for the mixing zones. (2 to 38˚C) • • • • • • Note: There is only a ±3°F adjustment in the Default = 70°F (21°C) LTD access level.

  • Page 31: Testing And Troubleshooting

    Default = INST Testing the Control The Universal Reset Control 363 has a built in test routine which is used to test the main control functions. The 363 continually monitors the sensors and displays an error message whenever T est a fault is found.
  • Page 32 MAX HEAT (MAX HEAT) The Universal Reset Control 363 has a function called Max Heat . In this mode, the 363 turns on and operates the system up to the maximum set temperatures, and the mixing device at the set percentage, as long as there is a demand for heat. The control continues to operate in this mode for up to 24 hours or until either the Item, Menu or Test button is pressed.

  • Page 33: Monitor Menu

    Sketch the piping of the system. This is a relatively simple step that tends to be overlooked, Sketch the however it can often save hours of time in troubleshooting a system. Note flow directions in the Piping in the system paying close attention to the location of pumps, check valves, pressure bypass valves and mixing valves.
  • Page 34 363 Monitor Menu (2 of 3) Note: To clear the recorded information in the specific Item field, press and hold Access Level Item Field Description Range • • • The highest temperature recorded at the boiler sensor since 0 to 255˚F this item was last cleared.

  • Page 35: Error Messages

    363 Monitor Menu (3 of 3) Note: To clear the recorded information in the specific Item field, press and hold Access Level Item Field Description Range The number of times that the microprocessor in the control has had to reset itself since this item was last cleared. The control will •...
  • Page 36 Miscellaneous menu of the RTU have been checked by the user or installer. Note: Access level must be ADV in order to clear the error. Either an incorrect device has been connected to the tekmar Net (tN1 / tN2) input terminal, or an RTU has been connected to the control and the Heating Curve / Reset Ratio DIP switch has been set to Reset Ratio .
  • Page 37 363 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.
  • Page 38 363 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.
  • Page 39 Notes 39 of 40 Copyright © D 363 -06/99...

  • Page 40: Technical Data

    This warranty is in lieu of all other warranties, express or implied, which the Governing Law (being the law of British Columbia) allows parties to contrac- The liability of tekmar under this warranty shall be limited to, at tekmar's sole dis- tually exclude, including, without limitation, warranties of merchantability,...

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