tekmar 529 Thermostat Installation - Manual (Page 18)

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Exercising ---------------------------------------------------------- ----------------------------------------------------------
When connected to a tekmarNet ® reset 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 thermostat
shows “TEST” on the display.
Flushing ------------------------------------------------------------ ------------------------------------------------------------
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
® reset
control with the Flushing feature turned on, the thermostat display will display the
“FLUSH” icon for the duration of the flushing operation.
Hydronic System Supply Pump --------------------------------------- ---------------------------------------
The thermostat has a Heat 1 Supply Pump and Heat 2 Supply Pump setting that
affects how the supply pump operates on the reset control. Select On to operate
the primary pump, and/or the mix system pump when there is a call for heat from
the thermostat.
In special applications with multiple zoning manifolds, the Heat 1 Supply 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.
A separate Heat 1 Supply Pump Delay setting exists if the thermostat operates a
thermal motor (wax actuator) zone valve. Select On to provide a three minute delay
to allow the zone valve to open before the primary or mix system pump is turned
on. Select Off when operating zone pumps or motorized zone valves.
DHW Tank Priority --------------------------------------------------- ---------------------------------------------------
When a tekmarNet ® reset 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
® reset control.
Warm Weather Shut Down -------------------------------------------- --------------------------------------------
When the outdoor air temperature exceeds the Warm Weather Shut Down (WWSD)
setting on the tekmarNet
® reset control, the heating system is shut off.