15 Frost Protection
Your installer may have fitted a frost thermostat. If not, and you are likely to be away for a short time, leave the boiler on with the room
thermostat set at a low setting. For longer periods, the boiler should be turned off and the system drained down. Contact your Installer
for draining and re-filling the system. Alternatively, a suitable anti-freeze may have been added to the heating system water. Check with
your installer.
16 Corrosion Protection
In order to prevent corrosion within your heating system and boiler, your installer should have flushed the system and added a suitable
corrosion inhibitor.
NOTE
The Grant Guarantee on the boiler shell (heat exchanger) requires that the heating system is flushed or chemically
cleaned, following installation, and the required quantity of corrosion inhibitor is added to the heating system water.
Grant strongly recommends that an in-line magnetic filter (either a Grant Mag-One or equivalent*) is fitted in the heating
system pipework.
This should be installed and regularly serviced in accordance with the filter manufacturer’s instructions.
*The Grant Mag-One magnetic filter has a Gauss measurement of 12000.
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