Testing the control – tekmar 371 House Control User Manual
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DIP Switch Settings
Note Once the control is in operation, the control will not update any changes in the
DIP switches until the next heating or cooling cycle.
Occ / UnOcc — Occ. Only
Each zone can be selected to operate in either Occupied only mode or in both Occupied
and UnOccupied modes. If the DIP switch is set to
1,2 Occ. only, the zones connected
to relays
1 and 2 remain in the Occupied mode at all times. If the DIP switch is set to
1,2 Occ / UnOcc, zones 1 and 2 are switched into UnOccupied mode each time the 371
receives an UnOccupied signal. Zones
3, 4, and 5 can be individually selected for
Occupied only or both UnOccupied and Occupied mode operation.
Mixing — Boiler
Each zone can be individually selected to operate either in the
Boiler mode or Mixing
Mode. If a zone's DIP switch is set to
Mixing, the 371 assumes this zone is in the mixing
(warm water) loop, and if the zone's DIP switch is set to
Boiler, the 371 assumes the
zone is in the boiler (hot water) loop.
If a zone control is connected with the 371 and it is used to control boiler (hot water)
zones the
Zo DIP switch must be set to Boiler. If the zone control is operating mixing
(warm water) zones, the
Zo DIP switch must be set to Mixing.
If a setpoint demand is used to control a boiler (hot water) load, the
Setpnt DIP switch
must be set to
Boiler. If the setpoint demand controls a mixing (warm water) load the
Setpnt DIP switch must be set to Mixing.
Optimum Start
The Optimum Start / Stop feature is used during transitions between the UnOccupied
mode (Night Setback) and the Occupied mode. When the DIP switch is set to
Optimum
Start, the 371 raises the building temperature during the final stages of the UnOccupied
period. This helps ensure the building is at the Occupied temperature as soon as the
Occupied period begins. If the Optimum Start DIP switch is set to
Off, the 371 does not
start raising the building temperature until the UnOccupied period ends. More informa-
tion on the Optimum Start feature is provided on page 5 of this brochure.
Thermal Motor
Zone valves with thermal actuating motors have long opening and closing times. In
order for the 371 to compensate for these longer times, the DIP switch should be set
to
Thermal Motor. If fast acting electric motor zone valves or zone pumps are used, the
DIP switch must be set to
Off.
DHW during UnOcc.
If the DHW tank requires heating during the UnOccupied mode, the DIP switch should
be set to
DHW during UnOcc.. When this DIP switch is set to Off, the 371 ignores all
DHW demands during the UnOccupied period.
Floating / Var. Speed
The 371 can provide mixing reset by operating a variable speed injection pump or by
modulating a mixing valve. If variable speed injection pumping is used , the DIP switch
must be set to
Var. Speed. If a mixing valve actuator is connected to terminals
Opn 4 — Cls 5 (30 and 31), the DIP switch must be set to Floating.
Zone 1 Cool / Zone 1 Heat
The zone
1 relay can be used to control a heating zone or to operate a cooling system.
If zone
1 is to be used for a heating zone, the DIP switch must be set to Zone 1 Heat.
If zone
1 is used for cooling, the DIP switch must be set to Zone 1 Cool.
Testing the Control
STEP SEVEN
OPERATIONAL TEST OF CONTROL FUNCTIONS
The House Control 371 has a test routine which is used to test the main control functions. The 371 continually
checks the sensors and displays an error message whenever a fault is found. See page 19 for the list of error
messages. When the
Test button is pushed, the Test light is turned on. The WWSD, Maximum Supply,
Minimum Boiler and Optimum Start / Stop lights are turned off and the individual outputs and relays are tested
in the following test sequence.
Test Sequence
Each step in the test sequence lasts 10 seconds. At the end of each step, the device continues to operate until it is turned off in a
later step.
Occ/UnOcc
Permitted
1,2
4
3
Occ. only
5
Setpnt
Boiler
1 2 3 4 5 Zo
Mixing
Zone 1 Heat
Zone 1 Cool
Floating
Var. Speed
Off
DHW during UnOcc.
Off
Thermal Motor
Off
Optimum Start
Test