Specifications

Logamax plus GB142 applications manual | 01.2012
Technical specifi cations are subject to change without prior notice
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GB142 Applications Manual
WWSD
Warm weather shut down (WWSD) temperature is factory set
for 70°F (21°C). If the outdoor temperature rises above this
setting, the boiler will be turned off except for generating DHW.
The value can be adjusted between 32°F (0°C) and 86°F
(30°C).
Mounting of the AM10
The recommended mounting locations are either on the wall
next to the boiler or on the boiler jacket. A mounting bracket is
included with the controller.
Positioning the outdoor sensor
For best performance the outdoor sensor is to be positioned
at a location where it is not influenced by sunlight. Mount only
on a North facing wall of the building, and at least 1 foot above
snow line. Keep the sensor away from heat sources such as a
dryer, water heater, or boiler vents, windows, etc.
Multi-Zone Relay Box
to
Fig. 8 Installation example with zone relay box
Single Boiler Control
To equip a single GB142 boiler with outdoor reset control, the
following items are recommended: (not included)
• ON/OFF thermostat for each heating zone
• Pump relay or zone valve panel according to the number
of zones
• Low and high voltage wiring, 24VAC transformer, etc.
Wiring Details:
If there are multiple zones, wire all closed contacts to the AM10
so that each call for heat produces a heat demand.
Set the BC10 central heating dial to automatic (AUT), unless
the system consists exclusively of low temperature radiant,
where the central heating dial can be used as a high limit
protection. In cascades the AUT setting is required.
Note: Do not install an RC10, EM10, or RC35 when using this
configuration as these devices do not coexist with the
AM10. For multi-boiler systems add the MCM10 cascade
module between the AM10 and the boilers.