T8775A,C THE DIGITAL ROUND™
CUSTOMIZE THERMOSTAT
Setting Fuel Switch (T8775C only)
The fuel switch is preset at the factory in the F position. See Fig. 7. This is the correct setting for gas or oil systems. If the T8775C is being installed on an electric heat system, or a heat pump, set the switch to the E position. The E setting allows the fan to turn on immediately with the heating equipment in a system where the G terminal is connected.
FUEL SWITCH | M19497 |
Fig. 7. Fuel switch.
DIP Switch
To adjust the heat cycle rate or the Fahrenheit/Celsius indication, locate DIP switch 1, 2 and 3 on the back of the thermostat. See Fig. 8.
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| 3 |
| 2 | |
ON | 1 | |
M19567
Fig. 8. DIP switch.
Set Heat Cycle Rate
Use DIP switches 1 and 2 to set the heat cycle rate. See Table 1.
Table 1. Heat Cycle Rate.
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| Cycles | DIP | DIP |
| Per | Switch | Switch |
Heating System | Hour | 1 | 2 |
Steam, Gravity | 1 | On | On |
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High Efficiency Warm Air | 3 | Off | On |
(90%+ efficiency), Hot Water, |
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Heat Pump |
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Gas or Oil Warm Air (factory | 6 | Off | Off |
setting) |
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Electric Warm Air | 9 | On | Off |
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In Floor Radiant Heat | Check with manufacturer | ||
| for recommended cycle | ||
| rate. |
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Fahrenheit/Celsius Indication
Use DIP switch 3 to set the desired temperature indication. See Table 2.
Table 2. Temperature Indication.
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Fahrenheit/Celsius |
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Display | DIP Switch 3 |
Fahrenheit (factory setting) | Off |
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Celsius | On |
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Mounting Thermostat to Wallplate
ENGAGE TABS
AT BOTTOM OF
THERMOSTAT
AND WALL PLATE.
PRESS UPPER
EDGE OF CASE
TO LATCH
M19498
Fig. 9. Mounting thermostat to wallplate.
OPERATION
Setting SYSTEM and FAN Switches (T8775C only)
System and fan settings are controlled manually by using the switches located at the top of the thermostat. See Fig. 10.
3 |
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