Wolf CGB-75 Installation And Operating Instructions Manual page 9

Gas condensing boiler CGB-...
Gas condensing boiler to DIN EN 437 / DIN EN 13203-1 /
DIN EN 15502-1 / DIN EN 15502-2-1 / DIN EN 60335-1 /
DIN EN 60335-2-102 / DIN EN 62233 / DIN EN 61000-3-2 /
DIN EN 61000-3-3 / DIN EN 55014-1, as well as 92/42/
EWG (Efficiency Directive) / 2016/426/EU (Gas Applianc-
es Directive) / 2014/30/EU (EMC Directive) / 2014/35/
EU (Low Voltage Directive) / 2009/125/EG (ErP Directive) /
2011/65/EU (RoHS-Richtlinie) / Regulation (EU) 811/2013 /
Regulation (EU) 813/2013, with electronic ignition and elec-
tronic flue gas temperature monitoring, for low temperature
heating and DHW heating in heating systems with flow temper-
atures up to 90°C and 3 bar permissible operating pressure in
accordance with DIN EN 12828. This WOLF gas condensing
boiler is also approved for installation in garages.
Open flue gas condensing boilers must only
be installed in a room which complies with the
appropriate ventilation requirements. Otherwise
there is a risk of asphyxiation or poisoning.
Read the installation and maintenance instruc-
tions before installing the boiler. Also take into
consideration all technical information.
When operating the boiler with LPG use only
propane according to DIN 51 622, otherwise
faults may arise when starting and operating
the gas condensing boiler, which may lead to
damage to the appliance and personal injury.
A poorly vented LPG tank can lead to problems
with ignition. In such a case, contact the com-
pany that fills the LPG tank.
The adjustable cylinder water temperature can
exceed 60°C. For short term operation above
60 °C the boiler must be monitored in order to
prevent scalding. For continuous operation,
appropriate precautions should be taken to
prevent draw-off temperatures above 60 °C, e.g.
thermostatic valves.
3062555_201804
3. Standards and regulations
Fig.: Wolf gas condensing boiler
To protect against scaling, the DHW temperature should
be set to max. 50°C if the total water hardness is 15 °dH
(2.5 mol/m³) or above. Without an accessory regulator,
this corresponds to a maximum hot water rotary selector
setting of 6. With a total hardness of 20 °dH or higher, use
of a water treatment facility in the cold water supply line
when heating DHW is necessary in order to extend the
maintenance intervals.
Failure to take such precautions will result in premature
scaling of the appliance and a reduction in the convenient
availability of domestic hot water. The contractor respon-
sible should always check the local conditions.
9