Install Instructions

12 of 20

A Watts Water Technologies Company

Room Minimum and Maximum

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Room Minimum and Maximum temperature settings are available in the Setup menu.

These allow the installer to select start and stop limits for the temperature setting. This

is useful in commercial installations and child or guest bedrooms where availability of

the full temperature setting range may not be desirable.

Warm Weather Shut Down

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When the outdoor air temperature exceeds the Warm Weather Shut Down (WWSD)

setting on the tekmarNet main control, the heating system is shut off.

Freeze Protection

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The thermostat operates the heat whenever the room or floor temperature falls below

40°F (4.5°C) even when the mode is set to off.

Exercising

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When connected to a tekmarNet system control, the thermostat exercises the heat

relay for 10 seconds every 3 days. Exercising helps prevent zone valves or zone pumps

from failing due to precipitate buildup. During exercising, the relay turns on but is not

shown on the display.

Flushing

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The flushing feature is for open-loop systems that use a domestic hot water tank as a

heat source. Flushing ensures that fresh potable water is circulated through the system

once each day. If the thermostat is connected to a tekmarNet system control with the

flushing feature turned on, the relay turns on but is not shown on the display.

Hydronic System Supply Pump

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When connected to a tekmarNet system control, the thermostat’s W Pump setting

affects how the primary pump or mix pump on the system control operates. When

connected to the boiler bus, the boiler system or primary pump is operated when W

Pump is set to on. When connected to the mix bus, the mix system pump is operated

when W Pump is set to on.

If the thermostat operates a thermal motor (wax actuator) zone valve, set the W Delay

setting to on. 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 W Pump setting can be set

to off. This allows a Zone Group Pump located on the Zone Manager or Wiring Center

to operate the pump for the manifold.

DHW Tank Priority

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When a tekmarNet

system control is heating an indirect Domestic Hot Water (DHW)

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 system control.