Part no. 30 44 327
Subject to technical modifications
GB
Wolf GmbH · 84048 Mainburg · Postfach 1380 · Tel. +49-8751/74-0 · Fax +49-8751/741600
Conversion from central heating boiler to combi boiler
for conversion set, part no. 86 02 668
CGB-20
This conversion must only be implemented using the
conversion set, available as a Wolf accessory.
Conversions must only be carried out by authorised
contractors.
Fig. 1: Conversion set contents
1
Carry out the following steps - ensure you only use new flat packing:
- Isolate the wall mounted boiler from the electrical mains.
- Drain the system in accordance with the installation instructions.
- Remove the siphon.
- Remove the cap from the distributor block upstream of the heating
circuit pump (Fig. 2).
- Remove the 90° bend from the heating flow (Fig. 2).
- In its place, install the 90° bend of the three-way diverter valve (1)
(Fig. 3).
- Secure the pre-assembled set (2) to the three-way diverter valve.
- Connect the plate heat exchanger and the distributor block with the
pipe supplied (3).
- Check all threaded connections, including the pre-assembled set, for
a tight fit.
- Connect the three-way diverter valve with the plug on the cable set
provided (Fig. 3).
- Connect the blue flow sensor socket with the blue cable set plug (Fig. 3).
- Install the filled siphon.
Flue gas can escape into the installation room, if the siphon
is not filled.
- Reconnect the equipment again.
- Fill the heating system as described in the installation instructions.
- Open the fresh water supply to your system.
- Check all components for leaks.
Leaks will lead to water damage.
- Affix the conversion label (5) below equipment type plate.
After conversion and with mains power connected, draw
DHW with a fully open tap longer than for a minute, to
initialise the control unit for combi operation.
Fully open one tap if fault code 14 is displayed after commissioning.
While the tap is open, carry out a master reset (as described
below), then continue to let water flow out for at least another
minute.
If you have already made changes to the control unit parameters
to match the control unit to your system, then it is essential to
make notes of these changes beforehand and to re-adjust your
system after the master reset.
2
3
5
4
6
No.
Product
Part no.
Pieces
1
Three-way diverter valve
27 99 225
1
2
Set, pre-assembled
29 00 246
1
3
Pipe
20 13 025
1
4
Flat packing ¾"
39 03 021
4
5
Conversion label
CGB02——
1
6
Conversion instructions
30 44 327
1
Fig. 2: Installation preparations
90° bend
Locking cap
Fig. 3: Fully converted combi boiler
Blue plug
Plug
three-way
diverter valve
Pipe (3)
Assembly (2)
Implement the master reset as follows:
- Switch OFF the boiler.
- Press the reset button.
- Start up the boiler whilst holding down the reset button.
- Hold down the reset button until the illuminated ring briefly
flashes.
