5
OPERA
OPERA
OPERA
OPERA
OPERATOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
MAINS
RED
LOCKOUT
RED
RED
LIMIT
2-1.2 Mains Switch
O = Off
I = On
The Mains Switch switches the Boiler ON and OFF. When power to the Boiler is ON and
the Mains Switch is ON the Mains Indicator Lamp will be lit.
2-1.3 Mains Indicator Lamp
The Mains Indicator Lamp will be lit when the Boiler Mains Switch is ON and the heating
system control is calling for heat.
If the Lamp does not illuminate refer to Section 12 Fault Finding.
2-1.4 Lockout Indicator Lamp
When the Lockout Indicator Lamp is illuminated, it indicates that a Burner ‘Lockout’ has
occurred and the Boiler is not operational.
Refer to 3-3 to restart Boiler.
2-1.5 Limit Indicator Lamp
The Limit Indicator Lamp is illuminated when the water within the Boiler is overheated i.e.
the High Limit Thermostat of the Boiler control is tripped.
Standard High Limit Thermostat with automatic reset
When the Limit Lamp is lit (High Limit Thermostat tripped), the Boiler shuts down until
the water temperature falls to a satisfactory level (5°C below High Limit Thermostat
setting). The High Limit Thermostat then resets automatically and normal operation
should follow.
2-1.6 Manual Limit Reset Button
(Option)
A High Limit Thermostat with an integral Manual Reset button is normally fitted to System
Boilers and Combistream Boilers. Boilers fitted with ‘Manual Reset’ High Limit
Thermostats will not restart automatically after overheating has occurred.
The Limit Indicator Lamp is OFF when the Boiler is operating normally.
If the Lamp is ON the water within the Boiler is or has overheated i.e. the High Limit
Thermostat of the Boiler control is tripped.
When the Limit Lamp is ON (High Limit Thermostat tripped) the Boiler shuts down.
When the water temperature falls to a satisfactory level (5°C below High Limit Thermostat
setting), the Manual Reset button should be pressed - this will restart the Boiler.
If overheating occurs check that the Boiler Heating Thermostat control is set below 80°C
- see 2-1.1 If it still occurs more than occasionally, consult your installation engineer as
there may be a fault within the system.
The following items are for Combistream and Combi 65 only.
2-1.7 Hot Water Thermostat Control
With Manual Reset
The Hot Water Thermostat Control is used to set the temperature of the hot water from the
Combistream to the hot water taps. The heat sensor phial of the Thermostat is on the end
of a capillary tube and placed in a recess in the hot water storage cylinder.
The temperature range of the control is 30°C to 70°C. The recommended setting control
is 70°C.
The temperature of the hot water at the taps is controled by the Thermostatic Mixing Valve
see 2-3.
Installer tick if applicable
Installer tick if applicable
RED
LIMIT
Note
On Combistream Boilers It may also be
necessary to press the Hot Water manual
reset - see 2-1.8.
HOT WATER
22222