Initial Lighting - IDEAL Concord CXA 40/H Installation & Servicing Manual

GENERAL
Check that all drain cocks are closed, that any stop valves
fitted to the flow and return pipes are open and that the
system has been filled and properly vented.
PURGING
Check that the electricity supply is switched OFF.
Remove the casing lower front panel.
Extinguish all naked lights and open all doors and windows.
DO NOT SMOKE. Check that the gas supply is turned ON at
the meter and open the main gas inlet cock. Loosen the
union and allow air to be purged from the gas line until gas
is smelled. Refer to BS 6891 or IGE-UP-1 for further details.
Retighten the union.

21 INITIAL LIGHTING

1. Check that the boiler thermostat knob on the control box is
OFF.
2. Ensure that the main gas inlet cock is open (groove in the
square head in line with the pipe).
3. Press in the overheat reset button.
4. Switch on the electrical supply to the boiler.
5. Turn the boiler thermostat knob on the control panel to
number 6.
6. If the boiler does not light at the end of its ignition period, the
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LEGEND
1. Thermostat knob
2. Main gas inlet cock
3. Overheat thermostat
reset button
Concord CXA/H -
Installation and Servicing
INSTALLATION
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6
4
2
9
4. Lockout light
5. Lockout reset button
6. Burner on light
7. Control box
TESTING FOR GAS SOUNDNESS
Close the gas supply cock at the meter.
Remove the screw in the inlet pressure test point (Frames
21/22) and connect a gas pressure gauge to the test point.
Take particular care to ensure a gastight connection. Open
the gas supply cock at the meter and the appliance gas
cock; record the static pressure. Next, close the gas
supply cock at the meter. Wait for 1 minute for temperature
stabilisation then observe the pressure gauge over a
period of 2 minutes.
Any leaks must be cured.
Replace all pressure test point screws.
lockout light will be illuminated. Press in and release the
lockout reset button on the control box. The controls will
reset and after a period of time will attempt to relight.
7. Once the pilot has lit, the controls will open the main gas
valves and the main burners will light. The burner on light
will be illuminated.
8. When the boiler has lit, check all connections for tightness
using leak detection fluid.
9. Set the boiler thermostat knob to the required setting.
10. Turn off the electrical supply to the boiler at the mains.
1
2
8
7
8. Control panel
9. Main gas controlvalve
10. Manifold pressure setting adjuster
11. Overheat light
3
9
Con 1967
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