Tekmar tekmarNet 553, Руководство по установке и эксплуатации

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© 2013 553_D - 04/13
33 of 48
A Watts Water Technologies Company
Cooling Operation Section C
Set Cool Temperature
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The thermostat operates an air conditioner or a heat pump to provide cooling. The “Cool
On” symbol is shown on the display when the thermostat is cooling.
Radiant Floor Cooling
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The thermostat has the option to support radiant floor cooling when connected
to a heat pump control using tekmarNet
® communication. The terminal unit type
must be set to be HRF1 or HRF2, the floor cooling setting must be set to On and
the heating system must be in Warm Weather Shut Down (WWSD). When the heat
pump system control operates in cooling mode, all thermostats set for floor cooling
on the tekmarNet
®
bus all activate the first stage heating contact (W1) at the same
time to allow chilled water into the system. The thermostat continues to operate the
floor cooling until either the room temperature reaches the Set Heat temperature
plus 3°F (Set Heat+1.5°C) or reaches a minimum temperature of 74°F (23.5°C). If
only a floor sensor is installed, the floor cooling setpoint is 67°F (19.5°C).
Cooling Cold Weather Shut Down
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When the outdoor air temperature falls below the Cooling Cold Weather Shut Down
(CWSD) setting on the thermostat, the cooling system is shut off.
The first stage operates on a temperature differential of ±0.7°F (±0.4°C) centered
around the heating setpoint. The second stage heat turns on when the temperature
drops 0.7°F - W2 Differential setting below the heating setpoint. The second stage is
shut off once the temperature reaches the heating setpoint.
The second stage W2 is prevented from turning on until the first stage heat W or the
heat pump operates for the elapsed time set by the W2 Delay setting. Auto provides the
shortest wait time. A setting of OVR prevents the second stage from operating unless
the thermostat Mode is set to Emergency heat.
Warm Weather
Shut Down Cooling Cold
Weather Shutdown
Floor
Cooling
Warmer Outdoor
Temperature
No Cooling
Room Min and Max Limits
Section D
Heating and cooling minimum and maximum temperature settings are available in
the Set Temp menu. These allow the installer to select start and stop limits for the
temperature settings in both heating and cooling for the User and Limited access
levels. This is useful in commercial installations and child / guest bedrooms where
availability of the full temperature setting range may not be desirable.