Install Instructions

39
External Wiring
T
T
To Challenger
Low Voltage Terminal Strip
Circulator
Z
one 1
Thermostat
zone 1
Honeywell
R
845A
R
elay
120
H
VAC
N
C
irculator
Zone 2
Thermostat
zone 2
Additional zones may be
added as shown above
7
8
6
2
1
4
3
5
6
2
1
4
3
5
T
T
TT
Fig. 20: Field Wiring with Zone Circulators
Thermostat
Zone 1
Zone 1
Circulator
120 VAC
N
To Challenger
Low Voltage Terminal Strip
Zone 2
Circulator
Zone 3
Circulator
Thermostat
Zone 2
Thermostat
Zone 3
R
C
T1 T1 T2 T2 T3 T3
C3
C3
C2 C2 C1 C1 PR PR
X2 X1 L1 L2 ZC
H
7
8
Fig. 21: Typical Zone Relay Panel Wiring