WATTS IOM-T-563 Tekmar WiFi Thermostat Installation Guide
Floor Sensor for Radiant Floor Heating
The thermostat can measure floor temperature between -46 to 212°F (-43 to 100°C). If a floor
sensor is connected, floor minimum and maximum settings are available. The floor heating
setpoint is adjustable from 40 to 95°F (4.5 to 35°C).
For a combination of air and floor temperature control, leave the internal air sensor on in the
setup menu. A floor minimum can be used to prevent a fast drop in temperature caused by
receding solar exposure. This operation is recommended for areas heated by afternoon sun
through large windows. When the sun sets, it can take a long time for the floors to get warm
again. This may cause the room to cool off too much in the early evening. A floor minimum
setting can help with this condition by maintaining a floor minimum temperature. Keep in
mind the floor minimum temperature will override the air temperature, and if set too high,
may overheat the room.
A floor maximum is recommended for rooms with hardwood floors. Setting floor minimum
and maximum temperatures is a way of enhancing the comfort of the living space while
protecting floor coverings.
If there are more than one floor temperature sensors, the temperature is averaged.
It’s possible to heat a radiant floor while the cooling system is operating. This is desirable in
locations such as kitchens and bathrooms. To use this feature, set the Warm Floor During
Cooling on.
Cooling Differentials
The first stage cooling turns on when the air temperature rises 1.5°F (1°C) above the Cool
To setting and shuts off when the air temperature reaches the Cool To setting.
The second stage cooling has an adjustable differential and time delay setting to determine
when the stage turns on, and shuts off when it reaches 0.5°F (0.25°C) above the Cool To
setting.
Heat Pump Balance Point
An air source heat pump’s Coefficient of Performance (COP) declines with falling outdoor air
temperature. The Balance Point is the outdoor temperature at which it is more economical
to shut off the heat pump (relays Y1 and Y2) and operate the backup heating equipment
(relays W1 and W2).
Dual Fuel
Dual fuel systems include a heat pump together with a backup heat source such as a furnace
or a hydronic fan coil. When Dual Fuel is set to on, the heat pump (relays Y1 and Y2) is shut
off whenever the backup heating equipment (relays W1 and W2) is operating.
Warm Weather Shut Down (WWSD)
The heating system can automatically shut off based upon the outdoor temperature and the
WWSD setting. This provides a convenient way to shut off the heating system.
Cold Weather Shut Down (CWSD)
The cooling system can automatically shut off based upon the outdoor temperature and
CWSD setting. This prevents unwanted cooling during the winter.
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| General | Details |
|---|---|
| Name | WATTS IOM-T-563 Tekmar WiFi Thermostat Installation Guide |
| Make | WATTS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.63 MB |
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