ACV CC105s, Installation & Maintenance Manual

Page: 26 / 64

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9. External Wiring
9.8 Thermostat Wiring
Wire room thermostat or the zone panel end switch (isolated 1.
contact only) to the low voltage terminal strip, as shown in Fig.
12 on page 19.
Install the room thermostat on an inside wall away from
2.
influences of heat and cold, i.e. water pipes, areas of draft,
lighting fixtures and fireplaces for proper operation.
Set the thermostat anticipator (if applicable) as follows:
3.
Set for 0.1 amps when wired directly to the a.
CHALLENGER.
Set to match the total electrical power requirements of
b.
the connected devices when wired to zone relays or
other devices. Refer to the relay manufacturers’
specifications for additional information on the
anticipator setting.
9.9 Outdoor Temperature Sensor Wiring
The outdoor reset function requires the connection of the included
outdoor temperature sensor. See Section XII for outdoor temperature
sensor installation and wiring instructions.
9.10 SMART/COMFORT Aquastat Wiring
Wire SMART/COMFORT aquastat to the control module low voltage
terminal strip, as shown in Fig. 12 on page 19.
24 V
Transformer
by Others
Honeywell V8043
Zone Valves
or Equivalent
Honeywell R8285B1038
Transformer / Relay
or Equivalent
Low Voltage Terminal Strip
System Circulator
24V Low Voltage Wiring
120V High Voltage Wiring
Room Thermostats
H
N
120V
R
C
G
1
3 4
6
7
8
To Challenger
Fig. 14: System Circulator Wiring
When making low voltage connections to the CHAL-
LENGER, ensure no external voltage is present in the
thermostat circuits. If external voltage is present, use
and isolation relay to prevent damage to the appliance
control.
NOTICE
Isolate line voltage wiring from low voltage wiring to
prevent any potential for electical noise.
NOTICE