B. WIRING THE WALL THERMOSTAT
OEM must supply mating parts to connect these thermostats per Figure
1. The plugs must be connected to motorcoach wire harness before the
base is secured to the wall.
5
Figure 1
6636-345* Thermostat Assembly with Plugs
2
Operation
No functions occur in this mode
ID fan low, compressor #1 and OD
blower low cycle as needed
ID fan low, compressor #1 & #2 and
OD blower high cycle as needed
ID fan low continuous
ID fan low continuous, compressor #1
and OD blower low cycle as needed
ID fan low continuous, compressor #1
& #2 and OD blower high cycle as
needed
No functions occur in this mode
ID fan high, compressor #1 and OD
blower low cycle as needed
ID fan high, compressors #1 & #2 and
OD blower high cycle as needed
1
2
3
4
5
6
7
8
9
Mode
Switch
Cool
Cool
Cool
Cool
Cool
Cool
Cool
Cool
Cool
Fan
Switch #1
Auto
Auto
Auto
On
On
On
Auto
Auto
Auto
Fan
Switch #2
Lo
Lo
Lo
Lo
Lo
Lo
Hi
Hi
Hi
Calling
No
Stage 1
1
∞
Above Set
Stage 2
2
∞
Above Set
No
Stage 1
1
∞
Above Set
Stage 2
2
∞
Above Set
No
Stage 1
1
∞
Above Set
Stage 2
2
∞
Above Set
OPERATION CHART
The chart below shows the system functions with the 6636-345 thermostat.
After the entire air conditioning system (and furnace system) is installed,
check each position function.
6636-345 2-STAGE HEAT PUMP THERMOSTAT TRUTH TABLE
(GH) COOLING HIGH FAN
(B) 12 VDC NEGATIVE
(F) FREEZE SWITCH
(R) 12 VDC POSITIVE
(F) FREEZE SWITCH
(Y1) COMPRESSOR ONE
(Y2) COMPRESSOR TWO
(GL) COOLING LOW FAN
BLACK
BLUE
GRAY
RED
GRAY
YELLOW
ORANGE
PURPLE
(R) 12 VDC POSITIVE
(B) 12 VDC NEGATIVE
(W) FURNACE CONTROL
RED
BLUE
WHITE
