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3
G
O
Y
1
2
O
F
F
G
O
Y
B
1
2
O
F
F
70
69
68
67
66
65
64
62
60
55
50
45
40
71
72
73
74
75
76
77
78
79
80
81
82
83
84
86
88
90
Setpoint
Knob
Setpoint
Switch
A
C
50
6070 80
90
B
G
O
Y
1
2
O
F
F
70
69
68
67
66
65
64
62
60
55
50
45
40
71
72
73
74
75
76
77
78
79
80
81
82
83
84
86
88
90
70
69
68
67
66
65
64
62
60
55
50
45
40
71
72
73
74
75
76
77
78
79
80
81
82
83
84
86
88
90
Figure 5. Attach setpoint knob and cover
Figure 3. Thermostat base with typical wiring
Pull wires through this opening
Setpoint switch
(without knob)
Insert stripped wires into terminal blocks,
then tighten terminal screws.
G
O
Y
B
RWLC
1
2
O
F
F
Anticipation
Selection
Switches
W7
See
System
Function
Tabl e
WIRE THERMOSTAT TO SYSTEM
For best electrical connection, use solid 18 gauge wire. If you
must use stranded wire, tin the wires with solder to insure a good
electrical connection.
1. Strip wires back
1
⁄
4
”.
2. Using needle-nose pliers, insert wire into correct terminal
block opening (see figs. 3 and 4).
3. Tighten terminal block connector screw.
4. Repeat steps 2 and 3 for each wire.
To prevent electrical shock and/or equipment damage,
disconnect electrical power to system at main fuse or
circuit breaker until installation is complete.
This typical wiring diagram shows only the terminal identification
and wiring hookup. Always refer to wiring instructions provided
by equipment manufacturer for system hookup.
All wiring should be installed in accordance with local and
national codes and ordinances.
CAUTION
!
NOTE
L
C R
GO
Reversing
Valve**
Fan
Relay
Auxiliary
Heat
Relay
Thermostat
Control
Circuit
Compressor
Contactor
24 VAC
120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
Y
W
Figure 4. Typical wiring diagram
TRANSFORMER
Malfunction
Switch
* Reversing valve is energized when the System Switch is in the HEAT position
** Reversing valve is energized when the System Switch is in the COOL position
B
Reversing
Valve*
ATTACH SETPOINT KNOB AND COVER
1. After thermostat base is mounted on wall, remove cardboard
insert from setpoint switch.
2. Carefully press setpoint knob onto setpoint switch (see fig. 5).
3. Carefully snap cover onto thermostat base. Refer to the
OPERATION section for instructions on setting the thermo-
stat for desired operation.