Glow-worm 23c - Manual (Page 6)

6 2000225000B
Optional Clock-timers inclusive of installation
and user instructions:- These are available
from your nearest stockist.
Electro/Mechanical Part No. 4000122022
Digital Part No. 4000120494
18
Clock-timer instructions for use
Draining
Protection against freezing
The boiler has a built in frost protection programme as long as
the electricity and gas are left switched on.
If the temperature within the appliance falls to 3˚C the burner
and system pump are activated.
When the temperature inside the appliance reaches 10˚C the
burner will shut down and after a short period the pump will stop.
This device primarily protects the boiler. Any other exposed
areas of the system should be protected by a seperate frost
thermostat.
If the boiler is to be out of use for any long periods during severe
weather conditions, it is recommended that the whole system,
including the boiler, be drained to avoid the risk of freezing.
If in doubt, consult your servicing company.
Draining and filling
Caution: The boiler is installed as part of a sealed system which
must only be drained and filled by a competent person.