Tekmar 422 Universal Reset Module User Manual

D 42208/07- Data BrochureUniversal Reset Module 4221 of 32 © 2007 D 422 - 08/07• • tN4 Compatible • • Two Outdoor Reset Temperatures• • Single On-O

© 2007 D 422 - 08/07 10 of 32Item FieldRangeAccess Description40 to 100°F(4.5 to 38.0°C)Default = 70°F(21.0°C)AdBOILER INDOOR SECTION BThe design indo

11 of 32 © 2007 D 422 - 08/07Item FieldRangeAccess Description0 to 50%Default = 0%AdMINIMUM MODULATION SECTION CThe minimum percent modulation of the

© 2007 D 422 - 08/07 12 of 32ADJUST MENUItem FieldRangeAccess Description60 to 220°F(15.5 to 104.5°C)Default = 180°F (82.0°C)AdSETPOINT OCCUPIED SECTI

13 of 32 © 2007 D 422 - 08/07Item Field Range Access DescriptionInS (Installer)Ad (Advanced)InSAdACCESS LEVEL The access level of the control. The acc

© 2007 D 422 - 08/07 14 of 32IF the tN4 DIP switch is set to Mix 2:Step 4 The Mix 2 device ramps up to 100% over 10 seconds or according to the motor

15 of 32 © 2007 D 422 - 08/07Te stPress and Hold for 3 secondsTe stPress and Hold for 6 secondsMax HeatThe control has a function called Max Heat. In

© 2007 D 422 - 08/07 16 of 32tekmarNet®4 Communication Section AtekmarNet®4 (tN4) communicates between tN4 devices (thermostats, Reset Module and Exp

17 of 32 © 2007 D 422 - 08/07Terminal UnitThere is a terminal unit setting for each tN4 bus. The Terminal Unit setting is found in the Adjust menu.Hyd

© 2007 D 422 - 08/07 18 of 32Boiler Outdoor ResetThere is a water temperature and therefore a characterized heating curve for each communication bus.

19 of 32 © 2007 D 422 - 08/07The 422 is able to operate a single, hot water, on-off or modulating boiler as a heat source. For proper operation of the

© 2007 D 422 - 08/07 2 of 32Table of ContentsTable of Contents ...2Display and DIP Switches .

© 2007 D 422 - 08/07 20 of 32On-Off Boiler OperationIf the heat source is an On-Off Boiler, the Boil On-Off / Mod DIP switch must be set to On-Off.Dif

21 of 32 © 2007 D 422 - 08/07Minimum ModulationThe minimum modulation defines the minimum output signal from the control to the boiler burner. It is b

© 2007 D 422 - 08/07 22 of 32Mix 1 ModeA mixing device allows the control to reduce the boiler water temperature down to a lower water temperature. A

23 of 32 © 2007 D 422 - 08/07Variable Speed InjectionA standard wet rotor circulator can be connected to the Variable Speed output on the control for

© 2007 D 422 - 08/07 24 of 32DHW Mode and Priority OperationThe control has four different settings available for DHW Mode that affect pump operation.

25 of 32 © 2007 D 422 - 08/07DHW with Low Temperature Boilers Section IIf DHW heating is to be incorporated into a low temperature system such as a r

© 2007 D 422 - 08/07 26 of 32Boiler Target During SetpointThe boiler target temperature during a Setpoint Demand is increased to at least the Setpoint

27 of 32 © 2007 D 422 - 08/07Pump Operation Section KPrimary PumpThe primary pump is switched on in the following situations:• • There is a Boiler D

© 2007 D 422 - 08/07 28 of 32Error MessagesLocal Errors and Device ErrorsError messages are used to indicate a problem somewhere in the system. There

29 of 32 © 2007 D 422 - 08/07Error Messages (1 of 3)Error Message DescriptionADJUST ERRORThe control failed to read the Adjust menu settings, and relo

3 of 32 © 2007 D 422 - 08/07Access LeveltN4 Boiler / Mix 2Use the tN4 Boiler / Mix 2 DIP switch to select whether the second tN4 bus (terminals 59-60)

© 2007 D 422 - 08/07 30 of 32Error Message DescriptionMIXING EXPANSION MODULE CONFLICTA Mixing Expansion Module is connected to the Boiler bus. The Mi

31 of 32 © 2007 D 422 - 08/07Symptom Possible Causes Corrective ActionBoiler does not fire when there is a DHW or Setpoint DemandNo voltage present on

tekmar Control Systems Ltd., Canadatekmar Control Systems, Inc., U.S.A.Head Office: 5100 Silver Star RoadVernon, B.C. Canada V1B 3K4(250) 545-7749 Fa

© 2007 D 422 - 08/07 4 of 32PUMPDisplays when the primary or mixing pump is in operation.BURNERDisplays when the burner contact is closed.LOCKDisplays

5 of 32 © 2007 D 422 - 08/07User InterfaceUse the User Interface available on the Liquid Crystal Display (LCD) to setup and monitor the operation of t

© 2007 D 422 - 08/07 6 of 32View Menu (1 of 2)Item Field Range Access Description-76 to 149°F(-60.0 to 65.0°C)InSAdOUTDOOR SECTION B Current outdoor

7 of 32 © 2007 D 422 - 08/07Item Field Range Access Description– – –, 35 to 230°F(– – –, 1.5 to 110.0°C)AdBOILER TARGET SECTION CThe boiler target is

© 2007 D 422 - 08/07 8 of 32Item FieldRangeAccess Description-60 to 45°F(-51.0 to 7.0°C)Default = 10°F(-12.0°C)InSAdOUTDOOR DESIGN SECTION BThe design

9 of 32 © 2007 D 422 - 08/07Item FieldRangeAccess Description30 to 230 secondsDefault = 105AdMIX 1 MOTOR SECTION GThe time that the Mix 1 actuating m