Checking The Dhw Heating - Wolf FGB-K Series Installation And Maintenance Instructions For Contractors

Checking the DHW heating

Plate heat exchanger PHE
Screw
Dirt filter
PHE
Test run
Testing the combustion
parameters
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29. Checking the DHW heating
- Shut off the cold water and depressurise the system.
If the DHW output of a FGB-K is too low, take the following action:
- On FGB-K units, check and clean the dirt filter.
- Remove the plate heat exchanger of the FGB-K.
- With a 4 mm Allen key, release screws (2 pce) and pull off the plate heat
exchanger (PHE) upwards.
- Descale or replace the plate heat exchanger.
- Replace and grease the gaskets of the plate heat exchanger.
- After fitting, tighten the screws to a torque of 3.5 ± 0.5 Nm.
Screw
PHE
- Open the gas ball valve and switch on the appliance.
- Check the gas train and hydraulics for tightness.
- Hook the casing back into place and secure it.
- Press the emissions test mode key.
Test the combustion parameters following all maintenance work.
For instructions, see chapter 25.
Activate emissions test mode (press
and hold both keys simultaneously
for 5 seconds).
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