Frost Protection Mode; Pump Protection - Baxi Combi 624 Installation And Service Manual

The burner will light automatically and the temperature of domestic hot wa­
ter is controlled by the temperature sensor.
When the domestic hot water demand ceases the burner will extinguish
and the diverter valve will remain in the domestic hot water mode, unless
there is a demand for central heating.
4.2.6

Frost protection mode

Where the boiler is sited in an unheated enclosure and during periods
when the heating system is to be unused it is recommended that the per­
manent live is left on to give boiler frost protection.
When the boiler temperature falls below 5° C, the boiler will fire until a
temperature of 30° C is reached.
Important
This will not protect the system !
Further protection can be incorporated by using a system frost thermostat.
4.2.7

Pump protection

If the boiler has been inactive for a period of 24 hours the pump will auto­
matically operate for 1 minute to prevent sticking.
4 Description of the product
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