WarmFlow Agentis B Series, Manual, Page: 64 / 136

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6.4.2 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.
6.5 Combination Boiler Pump Overrun Function
The Combination Boiler has been fitted with a pump overrun function. In order for
the function to operate, the boiler must be installed with a permanent live supply.
Failure to do this will result in incorrect operation of the appliance, and nuisance
high limit cut outs.