Combi - Cadet 40-120 Installation And Service Manual

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Combi

The Cadet Combi - How it works...
1. DHW pump
Begins operation when the domestic flow switch enables demand.
An integral flow check prevents flow of the boiler water while in
the space heat demand.
2. Brazed plate heat exchanger
Transfers heat from the primary boiler heat exchanger through a
brazed plate, in a water to water heat exchange.
. Domestic flow switch
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Factory mounted to the domestic inlet port of the brazed plate
heat exchanger, the normally open flow switch closes contacts
and enables heating of domestic water at 0.53 GPM.
4. Domestic outlet water sensor
A thermistor is located at the domestic outlet port of the
brazed plate heat exchanger. In Combi Mode, this sensor acts as
the controlling sensor.
5. Manual air vent valve
Allows for removal of trapped air from the heat exchanger.
Model 120 - Combi
80
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Installation & Operation Manual
A field-supplied anti-scald device MUST be
WARNING
installed as shown in FIG. 14-3. Anti-scald
devices must be selected and installed in
accordance to local codes. Failure to do so will
result in scald or serious injury. The Combi is
capable of supplying domestic water greater
than 120°F which may scald.
This section contains specifi c instructions for
NOTICE
Combi units. All warnings, cautions, notes and
instructions in the general installation and
service sections apply to these instructions.
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IMG00255