Install Instructions

37
External Wiring
CH Circulator
1. Connect the CH primary circulator to the
CHALLENGER 120 V terminals 1,2 and 3
located inside the appliance as shown in
Fig. 16, page 34.
2. Maximum CH circulator continuous cur-
rent draw is 2.3 A.
System Circulator - Zone Valve Application
To energize the system circulator shown as
item 12 in Fig. 8 page 20 reference Fig. 18.
Installer to provide a Transformer / Relay such
as Honeywell R8285 or equivalent and Zone
Valves with isolated end switch such as
Honeywell V8043 or equivalent.
Outdoor Reset Control
The CHALLENGER may operate with a vari-
able appliance operating temperature using the
Triangle Tube outdoor sensor, see pages 55
through 57 for installation and set-up.
If the installer opts for a fixed operating
temperature for the boiler system, the
outdoor sensor is not required and
should not be installed.
NOTICE
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. 18: Secondary System Circulator Wiring