Switching The Boiler On; Switching The Boiler Off; Burner 'Lockout - GAH S40/65 User Manual

3-1

Switching the Boiler ON

To set Boiler for operation:-
Select and Combi
1. Turn fuel supply on.
2. Switch power supply to the
Boiler ON.
3. Switch Mains Switch of the
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Boiler Control Panel ON.
4. Set Boiler Thermostat Control
to the required setting.
5. Set Central Heating Control
System to ON.
Note
The Installer should instruct the user on
operating the central heating system.
3-2

Switching the Boiler OFF

Note
For frost protection of External Wall
Mounted and External Freestanding
Boilers the mains switch controlling the
Boiler must be ON.
Remember
Switch on the fuel before attempting to
restart the Boiler.
3-3

Burner 'Lockout'

*NOT ON OPTION RANGE.
8
External
1. Turn fuel supply on.
2. Switch power supply to the
Boiler ON.
3. Set Normal/Override switch to
Normal.
4. Set Boiler Thermostat Control
to the required setting.
5. Set Central Heating Control
System to ON.
3-1.1 Boiler Operation
The Boiler Thermostat switches power to the Burner ON and OFF in response to the
temperature of the water within the Heat Exchanger.
The Burner will automatically fire when the water temperature within the Boiler falls below
the thermostat control setting, and will continue to run until the water temperature rises to
the set °C.
The Burner has its own Control System that gives correct ignition and shut-off sequences
to maintain safe operation.
3-1.2 Automatic Boiler Operation
A fully automatic central heating and hot water installation with its own remote timer and
control system will switch the Boiler ON and OFF as and when heat is required.
The Boiler can be switched off by any of the following means:-
1. Switch the Mains Switch on the Boiler Control Panel to OFF (not Option or External).
2. Turn the Boiler Thermostat control to STOP .
3. Switch OFF the Mains Switch controlling the Boiler.
4. Set the Central Heating Control System to OFF.
IMPORTANT In the event of abnormal operation:-
1. Switch OFF the Mains Switch controlling the Boiler.
2. Shut OFF fuel supply.
3. Refer to Section 12 Fault Finding.
The Burner has its own Control System that synchronises the Burner ignition sequences.
The safety system of the Burner includes a flame detector (photoresistor) which senses
the light of the flame.
In the event of a failure of the flame, the Burner Control goes through a re-ignition
sequence. If the flame is not evident within 15 seconds, the Burner shuts down due to
its lockout circuit being energised.
The Reset Lamp in the Burner Reset button and the *Lockout Lamp on the Boiler Control
Panel illuminate to indicate that 'lockout' has occurred.
BOILER OPERA BOILER OPERA BOILER OPERATION BOILER OPERA BOILER OPERA TION TION TION TION
Option
1. Turn fuel supply on.
2. Switch power supply to the
Boiler ON.
3. Set Boiler Thermostat Control
to the required setting.
4. Set Central Heating Control
System to ON.
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