Wolf CGB-2 Series Installation Instructions For Contractors page 22

Heating circuit
We recommend installing a maintenance valve in both the heating flow and heating return – angled design for concealed installa-
tion, straight design for surface mounting.
The return line to the appliance must have a dirt trap. A sludge separator with magnetite separator should be
Please
used to protect the appliance and the high efficiency pump from dirt/sludge and magnetite.
note
Deposits in the heat exchanger may lead to boiling noise, a drop in performance or faults in the appliance.
Installation on unfinished walls
Seite 14
Bild: Eckwartungshahn, mit KFE-Hahn (Zubehör)
Bild: Eckwartungshahn mit Anschluss für Sicherheitsventil,
mit KFE-Hahn (Zubehör)
Fig:
Angle maintenance valve, with
BDF valve (accessories)
On boilers that are not used for DHW, seal the
cylinder flow and return connections tightly
with locking cap G¾" (accessories). Install a
safety valve with 3 bar opening pressure on site in
the heating return (see connection kit accessories).
Failure to observe this requirement can result in
material losses on building and equipment due to
uncontrolled water leakage.
Heating circuit safety valve
Install the safety valve marked "H", max. 3 bar.
Cold water and DHW connection
A maintenance valve must be installed in the cold water
supply line.
We recommend installing a maintenance valve into the cold
water supply line.
If the cold water supply pressure is above the maximum
permissible operating pressure of 10 bar, install a tested and
certified pressure reducer in accordance with Wolf accessories.
If mixer taps are used, provide a centralised pressure reducer.
Observe the regulations of DIN 1988 [Germany] as well as
those of your local water supply utility when connecting cold
water and DHW.
Your warranty is void if the installation does not comply with
the illustration shown.
Note: When selecting the installation material for the
system, observe engineering standards and take
into account possible electrochemical processes.
(Mixed installation)
22
11. Installation
Seite 14
Bild: Eckwartungshahn, mit KFE-Hahn (Zubehör)
Bild: Eckwartungshahn mit Anschluss für Sicherheitsventil,
mit KFE-Hahn (Zubehör)
Fig:
Angle maintenance valve with
connection for safety valve, with
BDF valve (accessories)
Installation on finished walls
Bild: Bild: Durchgangswartungshahn mit
Durchgangswartungshahn, Anschluss für Sicherheitsventil, mit
mit KFE-Hahn (Zubehör) KFE-Hahn (Zubehör)
Fig:
Straight-through maintenance
valve, with BDF valve (acces-
sories)
Cylinder flow
G¾"
Fig: Cylinder flow/return connections
Fig: Heating circuit safety valve (accessory)
Fig: Cold water connection to DIN 1988
Bild: Bild: Durchgangswartungshahn mit
Durchgangswartungshahn, Anschluss für Sicherheitsventil, mit
mit KFE-Hahn (Zubehör) KFE-Hahn (Zubehör)
Fig:
Straight-through maintenance
valve with connection for safety
valve, with BDF valve (acces-
sories)
Cylinder return
G¾"
Bild: Sicherheitsventil Heizkreis (Zubehör)
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