1. Turn off electrical power.
2. Close all manual gas valves.
3.9
SHUTDOWN PROCEDURES
3.9.1
NORMAL SHUT OFF PROCEDURES
3.9.2
EMERGENCY SHUT OFF PROCEDURES
The main gas cock should be closed immediately. If overheating occurs or the gas supply fails to
shut off, do not turn off or disconnect the electrical supply to the pump. Instead, shut off the gas
supply at a location external to the boiler.
3.9.3
SHUTTING THE BOILER DOWN FOR AN EXTENDED PERIOD OF TIME
Press ‘CH MODE’ and ‘DHW MODE’ on the display together and keep pressed for at least 3 seconds.
The boiler now enters suspend mode. Only frost protection is active. Refer to Section 2.6 for details
of Frost Protection operation.
3.9.4
STARTING THE BOILER AFTER PROLONGED SHUTDOWN
Perform initial start up procedures as described in this manual.
3.8.7
AUTO DETECTION
If error FE97 occurs, it is most likely a mismatch in the cascade system due to a change in the
number of boilers or boiler settings. In this case perform an Auto Detection by holding “CH –” button
on the display of the master boiler for 3 seconds.
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