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0311767_HWH_32-129_II_UKUK_V2.4, 2020-01-31
HWH 87-480 to 129-480
5.
The gas control valve has a test nipple that can be used for measuring the supply
pressure.
This test nipple has a sealing screw. Loosen the sealing screw by a few turns. Do not
completely loosen it as it can be difficult to retighten.
6.
Open the gas supply and vent the gas supply line via the test nipple.
7.
Connect a pressure gauge to the test nipple as soon as gas starts to flow from it.
8.
Switch on the power to the appliance using the isolator on the appliance.
9.
Switch the controller ON by setting the 0/I switch to position I.
The display will now show INTERNAL CHECK for about 10 seconds, and will then go
to the main menu.
10.
Select SERVICE OPERATION, FULL LOAD from the service menu.
IMD-1095a R0
IMD-1097a R0
IMD-1096a R0
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