Operating 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.
DHW Circulator for Optional Smart IFWH
1. Connect the DHW circulator using the
CHALLENGER 120V, terminals 4, 5 and 6
located inside the appliance as shown in
Fig. 16, page 34.
2. Remove one of the gray plastic strain
reliefs on the bottom of the boiler and
install a field supplied duplex connector
and two washers in its place. Place one
washer on the inside and the other outside
of the boiler before installing the duplex
connector. The duplex connector will allow
the wiring from the domestic circulator to
enter the boiler.
3. Maximum DHW 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
ACV-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