Wolf CGB-2 - DHW Heating Checks and Maintenance; Test Run and Emissions Check

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15.CheckingDHWheating
Shut off cold water and relieve hydraulic pressure in
the system.
Cleanthecoldwaterstrainer.
(Only for CGB-2K wall mounted combi boiler.)
IfCGB-2K,CGW-2orCGS-2LhaveinadequateDHW
output,proceedasfollows:
Non-return valve on CGW-2 and CGS-2L:
Check and descale if necessary.
DirtlteronCGB-2K:
Check and clean.
Removing the plate heat exchanger on CGB-2K,
CGW-2 and CGS-2L (not on CGS-2R)
Undo the knurled nuts (2 pce) under the panel with a
4 mm Allen key and pull the plate heat exchanger off
upwards.
Descaleorreplacetheplateheatexchanger.
After installation, tighten the knurled nuts with a torque
of 3.5 ± 0.5 Nm.
Checkingtheprotectiveanode(onlyonCGS-2L/R)
- Shut off the cold water valve.
- Depressurise the cylinder.
- Remove the cover.
- Unscrew the protective anode for checking.
- In case of significant wear, replace the anode.
Inprinciple,theCGW-2cylinderismaintenance-free.
Tightening torque for the nut for the bracket of the hand-
hole cover: 55-60 Nm
Testrun
Set MCBs, open gas ball valve and switch on
the appliance.
Check the gas train and hydraulics for tight-
ness.
Replace and secure the casing.
Press the Emissions test key.
Check the appliance for gas leaks (gas and
exhaust gas lines) during operation.
Cold water strain-
er
CoverMounting
bracket
Plate heat
exchanger
Non-return valve
(dirt lter)
Key
Emissions
test mode
Knurled
nuts
Plate heat exchanger
Protective
anode