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Thermostat Connection Diagrams
Mark IV/AC Units – Unit Sizes 007-060
7-Day Programmable Electronic Thermostat (P/N 107095901
)
Non-Programmable Electronic Thermostat (P/N 668054201
)
Optional Remote Sensor (P/N 667740201
)
S1 S2
S1 S2
Cut R12 from
circuit board
Remote Sensor
Thermostat
Wire 1
Wire 2
WSHP Mark IV/AC Board Low Voltage Terminal Strip (Circuit1)
O W2 G W1 Y1 F
E
L
U
A
P V
R
C
RC
W
1
Y1
W2
Y2
G
Thermostat T
erminals
WSHP Mark IV/AC Board Low Voltage Terminal Strip (Circuit1)
O W2 G W1 Y1 F
E
L
U
A
P V
R
C
RC
W
1
Y1
W2
Y2
G
O
Thermostat T
erminals
Override (Optional)
Includes Thermostat and Wall Plate.
Refer to the installation, operation &
application guide (LIA204-4) for ther-
mostat 668054201 installation details
Includes Thermostat and Wall Plate.
Refer to the installation, operation &
application guide (LIA217) for thermo-
stat 107095901 installation details
1. Remove cover from remote sensor housing.
2. Select an appropriate location for mounting the remote
sensor.
3. Mount remote sensor unit using hardware provided.
4. Install two strand shielded wire between remote sensor
and thermostat. Shielded wire must be used.
Do not run remote sensor wire in conduit with other wires.
•
Wire 1 should run between the S1 terminal on the ther-
mostat and the S1 terminal on the remote sensor
•
Wire 2 should run between the S2 terminal on the ther-
mostat and the S2 terminal on the remote sensor
•
Connect the shielding of the wire to the S2 terminal on
the thermostat
5. Disable the main sensor (R12) on the thermostat by
cutting it from the circuit board.