Service manual

7
6535-3451 Thermostat Wiring
The thermostat operation switches the
12VDC + to all output terminals
7B. THERMOSTAT - 6535-3351 COLEMAN-MACH SERIES THERMOSTAT
6335-3351 THERMOSTAT OPERATION
The display indicates room temperature and the word ROOM
is shown on the LCD until the temperature selector is pressed;
at which time the display temporarily indicates the setpoint
temperature and the word SET is shown on the LCD. Each
time the UP arrow is pressed, the setpoint will increase. Each
time the DOWN arrow is pressed, the setpoint will decrease.
Once the temperature selector button is no longer pressed for
a few seconds, the room temperature will again be displayed,
and the word ROOM will be displayed on the LCD.
In electric heat mode, if the heat pump is unable to satisfy the
thermostat, DIFF will flash on the thermostat LCD when 2
nd
stage heating is required to satisfy the thermostat.
In gas heat mode, the gas furnace will provide the only source
of heat and the heat pump is locked out.
NOTE
The temperature displays in degrees Fahrenheit
as a factory set default (See Figure 2). To
display in degrees Celsius, move the jumper
marked “F” and “C” to bridge between middle
pin and position “C”.