Customize Thermostat; Operation; Mounting Thermostat To Wallplate; Dip Switch - Honeywell T8775A Installation Manual

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.
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.
BACK OF THERMOSTAT
DIP SWITCH
Fig. 8. DIP switch.
Set Heat Cycle Rate
Use DIP switches 1 and 2 to set the heat cycle rate.
See Table 1.
T8775A,C THE DIGITAL ROUND™ NON-PROGRAMMABLE THERMOSTATS
FUEL SWITCH M19497
M19567
Table 1. Heat Cycle Rate.
Heating System
Steam, Gravity
High Efficiency Warm Air
(90%+ efficiency), Hot Water,
Heat Pump
Gas or Oil Warm Air (factory
setting)
Electric Warm Air
In Floor Radiant Heat
Fahrenheit/Celsius Indication
Use DIP switch 3 to set the desired temperature
indication. See Table 2.
Table 2. Temperature Indication.
Fahrenheit/Celsius
Display
Fahrenheit (factory setting) Off
Celsius

Mounting Thermostat to Wallplate

ENGAGE TABS
AT BOTTOM OF
THERMOSTAT
AND WALL PLATE.
PRESS UPPER
EDGE OF CASE
TO LATCH
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
Cycles DIP DIP
Per Switch Switch
Hour 1 2
1 On On
3 Off On
6 Off Off
9 On Off
Check with manufacturer
for recommended cycle
rate.
DIP Switch 3
On
M19498
69-1677ES—1