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7.9.4
0311767_HWH_32-129_II_UKUK_V2.4, 2020-01-31
2.
Confirm with [ENTER].
The display shown here will appear.
The appliance is now in PARTIAL LOAD mode and will ignite.
3.
You must wait about 1 minute after the display shows the text RUNNING before
reading the dynamic pressures (the fan needs this time to get up to full speed, so
that a reliable reading can be obtained).
4.
Use the pressure gauge to read the pressure and compare it against the value from
the gas table (see section 12.3).
5.
If necessary, adjust the gas control valve pressure using the reducing valve's
adjuster screw (2) until the value is within the range listed in the table.
Fig. Gas control valve pressure adjustment
CO
adjustment
2
To check the CO
value under full load and partial load and to adjust it if necessary,
2
proceed as follows:
1.
Isolate the appliance from the power supply (see section 4.2.2).
2.
Carefully remove the covers from the appliance.
3.
The electrical section is now visible.
4.
Place the CO
meter's measurement probe in the test nipple (58) of the flue gas
2
outlet pipe (the number is a reference on the General working principle of the water
heater (see section 5.1)).
5.
Open the gas supply and vent the gas supply line.
6.
Use the main switch to apply mains voltage to the appliance.
7.
Start the appliance (see section 4.1).
8.
Go to the [
] SERVICE OPERATION menu.
9.
Generate a heat demand by draining the appliance until it is cold or by raising the
value for T
in the SERVICE menu. Use [ ] for this.
set
Full load measurement
10.
From the service menu, select:
-
SERVICE OPERATION | FULL LOAD
-
Confirm with [ENTER].
The appliance is now in FULL LOAD mode and will ignite.
IMD-1096b R0
75
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