6
TO REMOVE PLUG PRESS SMALL SCREWDRIVER
THROUGH HOLE IN REAR OF PLUG
2-2
Control Panel - Option
2-2.1 Boiler Thermostat Control
The Boiler Thermostat Control is used to control the temperature of the water within the
Boiler Water Chamber.
The temperature range of the control is 60°C to 90°C. The recommended settings of the
Boiler Thermostat control are:-
Winter Heater and Hot Water 80°C
- Summer Hot Water only 65°C.
A setting of 60°C or below is not recommended as this can induce corrosion and reduce
the life of the Boiler.
2-2.2 High Limit Thermostat with Manual Reset
A High Limit Thermostat with an integral Manual Reset button is fitted as standard to
Option Boilers.
Boilers fitted with Manual Reset High Limit Thermostats will not restart automatically
after overheating has occurred.
The High Limit Thermostat will trip and shut the Boiler down when the water within the
Boiler is overheated.
When the water temperature falls to a satisfactory level (10°C below High Limit
Thermostat setting), the Manual Reset button (protected by a removable plastic cap)
should be pressed - this will restart the Boiler.
If overheating occurs more than occasionally, consult your installation engineer as there
may be a fault within the system.
C
90
75
60
THERMOSTAT CONTROL
Fig. 2-2a Option Control Panel with
Manual Reset
HIGH LIMIT
THERMOSTAT
MANUAL RESET
2-1.8 Hot Water High Limit Thermostat
With Manual Reset
A Hot Water High Limit Thermostat with an integral Manual Reset button is fitted to the
Boiler.
When the Hot Water High Limit Thermostat has tripped the Boiler shuts down and will not
restart automatically. The Limit lamp (2-1.6) will not be on as this is only for the Heating
High Limit.
To reset after hot water overheating has occurred, allow time for the water to cool, or run
off some hot water, then remove the plastic cap and press the HW Limit manual reset
button.
If overheating of the hot water occurs, turn down the Hot Water Control - see 2-1.7. If it
still occurs consult your installation engineer as there may be a fault within the system.
The following items are for all External Boilers only.
2-1.9 Mains Plug
The Mains Plug connects power to the Boiler.
The plug must be IN for the Boiler’s Frost Protection to function.
2-1.10 Normal/Override
The Normal/Override switch allows for the household heating control circuitry to be
overridden by switching to the permanent live.
The switch is intended for use by service engineers to allow operation of the Boiler
without the necessity of entering the household.
The switch should be set at NORMAL (O) at all other times.
OPERA
OPERA
OPERA
OPERA
OPERATOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
HOT WATER
HW LIMIT
Note
It may also be necessary to press the
Heating Limit manual reset - see 2-1.6.
NORMAL
OVERRIDE
Note
Boilers fitted with Manual Reset are
suitable for Sealed Systems.
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