Wiring - Daikin 910121750 Installation Operation & Maintenance

Installation
Figure 1: Base & rear view of thermostat
Mounting holes
W1
L
Y2
Y
G
RC
RH
C
Thermostat Base
Place level across mounting tabs
(for appearance only)

Wiring

Table 4: Thermostat wiring terminals & systems operation
Thermostat Terminal
RC
RH
C
Y
Y2
W1
W2
W3
W4
G
Dehumidification or waterside economizer, configurable terminal
DMA/A1
Rear View of Thermostat
6
L
Page 4 of 16 / IOM 1178-1
+
S
-
D/A
W4
W3
6
W2
HP1 Operation
24V power for cooling
24V power for heating
24V common
Compressor cool 1st stage
No output
ON Stack
Power
Stealing
OFF
Switch
Compressor heat 1st stage
No output
Auxiliary heat 1st stage (heat 2nd stage)
Heat 2nd stage (heat 3rd stage)
Fan
configuration menu
Powered close connection for SPDT 3-wire zone valve
System diagnostic indicator
Thermostat Base
"AA" batteries (2)
ON Stack
Power
Stealing
OFF Switch
Power stealing switches
Rear View of Thermostat
System
HP2 Operation
24V power for cooling
24V power for heating
24V common
Compressor cool 1st stage
Compressor cool 2nd stage
Compressor heat 1st stage
Compressor heat 2nd stage
Auxiliary heat 1st stage (heat 3rd stage)
Heat 2nd stage (heat 4th stage)
Dehumidification or waterside economizer, configurable terminal
configuration menu
Powered close connection for SPDT 3-wire zone valve
System diagnostic indicator
Fan