WATTS IOM-T-563 Tekmar WiFi Thermostat Installation Guide
When radiant floor heating is installed, it is always the first stage of heating, followed by
the heat pump, and lastly any backup heating. This allows the floor to remain warm in the
heating season.
Equipment Setting
1HP
1HP/
1Aux
1HP/
2Aux
2HP
2HP/
1Aux
2HP/
2Aux
First stage heating
Second stage heating
Third stage heating
Fourth stage heating
First stage cooling
Second stage cooling
Fan
Y1
-
W1
Y1
-
W1
Y1
W2
-
Y1
Y2
-
W1
Y1
Y2
-
W1
Y1
Y2
W2
Y1
Y2
-
-
-
-
Y1
-
Y1
-
Y1
-
Y1
Y2
Y1
Y2
G
Accessory 1
Choice of: Humidifier, Dehumidifier, HRV/ERV ventilator
Accessory 2
Reversing valve O or B.
O relay remains closed during heating operation.
B relay remains closed during cooling operation.
Emergency Heat
For systems with heat pumps, the thermostat includes an Emergency Heat mode. This mode
shuts off the heat pump Y1 and Y2 relays and operates the auxiliary heat, which is usually
more expensive. Select Emergency Heat if the heat pump will not operate due to refrigerant
pressure lockout condition.
Heating Differentials
The first stage heat turns on when the air temperature falls 1.5°F (1°C) below the Heat To
setting and shuts off when the air temperature reaches the Heat To setting.
The second, third and fourth stage heat each have an adjustable differential and time delay
setting to determine when the stage turns on, and shut off when they reach 1.5, 1.0, and
0.5°F (0.75, 0.5, and 0.25°C) of the Heat To setting respectively.
Radiant Floor Heating
Radiant floor heating is operated differently than other heating types due to the large time
delays to heat and cool the slab. When Radiant Floor Heating is selected in the setup
menu, the W1 relay operates using Pulse Width Modulation. This improves comfort for
radiant systems with high mass floors.
• 100% on time at Heat To setting -1.5
°F
• 50% on time at Heat To setting
• 0% on time at Heat To setting + 1.5
°F
Room Sensor and Averaging
The thermostat can measure room temperature between -46 to 212°F (-43 to 100°C). The room
temperature can be measured using a combination of the built-in and auxiliary sensors.
• Built-in room sensor only
• Built-in room sensor with auxiliary room sensor(s) (temperature is averaged)
• Auxiliary room sensor only
11
| 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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