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If the thermostat operates a thermal motor (wax actuator) zone valve, set the Supply
Pump setting to Delay. This provides a three minute delay to allow the zone valve
to open before the primary or mix pump is turned on.
In special applications with multiple zoning manifolds, the Supply Pump setting
can be set to Off. This allows the Wiring Center 375x to operate the pump for the
manifold.
DHW Tank Priority
When a tekmarNet
tank, the thermostat may shut off the heating zones to allow the DHW tank to recover
quickly. This is determined by the DHW priority of the tekmarNet
Warm Weather Shut Down
When the outdoor air temperature exceeds the Warm Weather Shut Down (WWSD)
setting on the tekmarNet
Cooling Group Operation
In order to prevent heating and cooling at the same time, this thermostat can operate
together with other thermostats on a tN4 system to form a cool group.
In a cool group, one thermostat is assigned as the cool group master. The cool
group master operates the cooling equipment for the group. This thermostat can
be set to be a member of the cool group.
When operating as a cool group, the air temperature readings of all the cool group
member thermostats are communicated to the cool group master and a temperature
average is determined.
When the cool group master is in cooling operation, the cool group member
thermostats do not operate the heating system for air heating.
If the Set Room Heat temperature is adjusted while the cool group is cooling, the
snowflake icon is flashed to alert the user that the cooling is presently on. Once
the cooling shuts off, the heating can start operation.
This thermostat joins cool group number 1 when switch setting 3 is set to cool member
1 (Off position).
© 2011
D 538e - 02/11
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reset control is heating an indirect Domestic Hot Water (DHW)
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reset control, the heating system is shut off.
Master
tN4 Communication
Cool Group 1
Member
Member
16 of 24
®
reset control.
Section B
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