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Concord CXA 40/H-120/H -
User's Guide
CONCORD CXA 90/H - 120/H models
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TO LIGHT THE BOILER
1.
Check that the boiler thermostat knob (1) on the control box
is OFF.
2.
Ensure that the mains gas inlet cock (2) is open (groove in
the square head in line with the gas pipe).
3.
Press in the overheat thermostat button (3).
4.
Ensure all system controls (time switch, system controls
etc.) are calling for heat.
5.
Turn the boiler thermostat knob (1) to position 6.
6.
If the boiler does not light at the end of the ignition period
the Lockout light (4) on the control box will be illuminated.
Press in and release the Lockout reset button (5). The
controls will reset and after a period of time will attempt to
relight.
7.
Once the pilot has lit the controls open the main gas valves
and the main burners will light and the Burner On light (6)
will be illuminated.
8.
Set all system controls to the required settings.
9.
Set the boiler thermostat knob (1) to the required setting.
LEGEND
1.
Thermostat knob.
2.
Mains gas inlet cock.
3.
Overheat thermostat
button.
4.
Lockout light.
5.
Lockout reset button.
6.
Burner on light.
7.
Overheat light
CONTROL PANEL LIGHTS
1.
The Boiler On light (6) is illuminated while the boiler is firing.
2.
If the Overheat light (7) is lit, pull off the casing lower front
panel and press in the overheat reset button (3). Replace
the lower front panel and follow the boiler lighting instructions
above. If the overheat condition persists consult a CORGI
registered installer.
3.
If the Lockout light (4) is lit press in the Lockout reset button
(5).
If the lockout condition persists consult a CORGI registered
installer.
TO SHUT DOWN THE BOILER
For short periods
Turn the boiler off at the time clock or system controls. Wait 6
min. and then turn the boiler control thermostat knob (1) to
OFF. Note the frost warning below.
For long periods
Turn the boiler off at the time clock or system controls. Wait for
6 min. and then turn the boiler control thermostat knob (1) to
OFF. Turn off the inlet gas cock (groove in the square head
across the line of the gas pipe). Note the frost warning below.
TO RELIGHT THE BOILER
After short periods
Switch on the time switch or system controls and turn boiler
thermostat knob (1) to the required setting. The boiler will light
providing the external controls are calling for heat.
After long periods
Follow the lighting instructions above. Refill the system if it has
been drained.
FROST WARNING
If frost is likely, leave the boiler thermostat at position 6 and
do not
turn off the gas cock. This will enable the built-in frost
thermostat to protect the boiler. Note that this may not protect
remote parts of the system, in which case a separate frost
thermostat should be fitted or the system drained and the
boiler shut down, as for "Long Periods".
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Summary of Contents for Concord CXA 40
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