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3.3.3 Fitting a Room Thermostat to a Combi
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. To prevent over heating of the
property a pipe thermostat should be fitted on the return pipe close to the boiler.
The Kabin Pak Combi boiler is factory fitted with a frost thermostat as standard.
3.3.5 Combi Pump Overrun Thermostat
The Combi boilers have been fitted with a pump overrun thermostat. In order for the
thermostat to work effectively the boiler must be supplied with a permanent live.
Failure to do this will result in nuisance trip outs.
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.
3.3.4 Fitting Frost Protection to a Combi
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