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1.4
Single Boiler Control
To equip a single GB142 boiler with outdoor reset control:
Required items:
– ON/OFF thermostat for every heating zone with individual zone pump or zone valve
– Pump relay
– Wiring
RC 10/20
Orange
RC
1
2
Fig. 7
Wiring detail
If there are multiple zones, wire all thermostats in parallel for calls for heat from any thermostat
to produce a heat demand.
Do not install RC10 module when
using this configuration.
AM10 - We reserve the right to make any changes due to technical modifications!
GB142 wire terminal strip
Outdoor
T T
DHW
Safety
sensor
Connection
Sensor
Blue
Lt Green
Lt Gray
FA
WA
FW
1
2
1
2
1
2
1
Terminals FA and WA
not used in this
application
Zone
valve
Low Voltage
Field wiring
120 Vac
Field wiring
Neutral
Line
Dedicated
120 Vac
15 Amp Circuit
Limit
Red
EV
2
1
Factory
Installed
Jumper
DHW Tank
Sensor
T
T
Pump Relay
N
H
C1
C2
X
X
Installation manual
AM10 Module
On / Off
2
1
2
1
2
1
Outdoor
sensor
7
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