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Ensure that all the washers are properly fitted.
Ensure all gas and water joints are sufficiently tight as not to leak.
•WATER TIGHTNESS OF THE WATER CIRCUIT
Allow water to flow into the heater by slowly turning on the water supply to the
appliance. This will prevent possible damage due to hydraulic shocks on high
pressure water supplies. Purge air from the water pipes by slowly turning on all the
hot and cold water taps. Turn off the taps and check for leaks around the heater.
• GAS TIGHTNESS OF THE GAS CIRCUIT
Connect a manometer to the inlet pressure nipple (Number 8 on Operating
Diagram) and carry out a gas soundness test in accordance with the current
procedure. Gas joints down stream of the magnetic valve which cannot be tested
during soundness testing with the manometer should be checked with leak
detection fluid with the appliance running.
• STARTING UP THE APPLIANCE AND FINAL CHECKS
Start the appliance by following the directions given in section 1, “Instructions for
Users”, checking that the appliance is working correctly. Pay special attention to the
colour of the flames ensuring there is no yellowness which would indicate burner
venturis blocked by insect matter.
Check the gas operating pressures with the heater under full power at the inlet
pressure nipple located on the left hand side of the gas body valve stem (position
8 ) the pressure drop should not exceed 2.5 mb below that specified in this manual.
Check the burner pressure with the heater at full load at the test nipple located on
the left hand side of the main gas valve body below the main burner. These
pressures must at least be equal those specified in this manual in order to achieve
the desired performance specified in this manual.
Check the flue for spillage; close all doors and windows in the room containing the
appliance. If any fans are fitted within the room containing the appliance, test with
the fan or fans on full.
Light any other open flued appliances contained within the room that may affect the
flue operation.
Turn the appliance on full and run for 5 minutes to allow the flue to warm up.
Hold a smoke match in the side opening of the draught diverter using an extended
holder, making sure the end of the match is located centrally in the draught diverter.
The smoke should be pulled up the flue and not back into the room.
If spillage is detected, run the appliance for a further 10 minutes and then repeat
the test. If spillage is still detected, then check the flue for blockages, the correct
flue and terminal is fitted and the correct size of ventilation is fitted.
These gas water heaters are set in the factory for use with the gas they are intended
to burn. The gas for which each appliance is set is indicated on the packaging and
on the cover of the heater itself.
Note: The jets to be used with the type of gas for which the appliance is intended will be
supplied from the factory. Their diameters correspond to the following sizes: Ø in mm
16
16


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