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WARNING
Electrical shock hazard. Turn OFF electrical
power supply at service panel before making
electrical connections. Failure to do so could
result in death or serious injury.
Central Heating Thermostat
A. Use thermostat or boiler system
control with dry contacts rated 0.5
amps @ 120 VAC. Boiler control
does not provide 24 VAC power to
central heating thermostat. Do not
use to power 24 VAC thermostat.
B. Locate and install thermostat per
manufacturer's instructions.
Maximum wire length is 330 ft
(100m) for 22 ga. Wire.
C. Connect wires to terminals 1 and 2
as shown in figure 17. Wires are
interchangeable.
Electrical Connections
Two Separate Terminal Blocks
CCB-150
1 = Thermostat or dry contacts
138 = Optional kit – External Outdoor Reset Sensor
LWCO Connections ON 6-PIN Terminal block
1 & 2: 120 Vac power to LWCO
3 & 4: Dry contact switching from LWCO
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