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6.3.2 Fitting a Room Thermostat to a Combi
Remove the purple wire from no 5 and no 28 on the PCB and wire the thermostat
as shown. The room thermostat should be located where it is not subjected to
extraneous heat gains, direct sunlight or draughts.
6.3.3 Building Frost Protection
1. Combi Boiler Models
In order to provide frost protection for the fabric of the building a frost thermostat
should be fitted in the coldest room in the house and calling for appropriate zone
valves to open and the boiler to call for heat irrespective of time clock operation.
To prevent over heating of the property a pipe thermostat should be fitted on the
return pipe close to the boiler.
To protect the fabric of the boiler only, the Kabin Pak Combi boiler is factory fitted
with a frost thermostat as standard.
2. All Other Boiler models
For all other boiler models building frost protection measures should be based
upon a thermostat fitted in the coldest room in the house and a pipe thermostat
fitted on the return pipe close to the boiler, These thermostats should call for heat
and open appropriate zone valves, irrespective of time clock operation. Consult
with your installer as installations will vary.
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