Viessmann FB2B Installation And Service Instructions Manual page 9

Preparing for installation
(cont.)
2. Prepare the connections on the DHW
side. Install the safety assembly
(accessory or on-site provision) in
accordance with
the Water Fittings Regulations 1999 in
the cold water line (see page 10).
Recommendation:
Install the safety valve above the
DHW cylinder to protect it against
contamination, scaling and high tem-
peratures.
Connect the drain hose to the con-
densate collector. Remove plug from
condensate collector.
3. Prepare the solar connections.
4. Route condensate hose O to the
back (drain in wall K) or to the side
aperture L (see page 6).
Route condensate hose with a U-
bend and connect to on-site drain line
or siphon. Discharge pipes from
expansion valves (safety valve)
should not be connected directly to a
drain and should pass through a visi-
ble tundish, with a AUK3 air gap, and
be located adjacent to the device.
5. Prepare the gas connection accord-
ing to TRGI or TRF or all local regu-
lations.
6. Prepare the electrical connections.
■ Power cable: NYM-J 3 x 1.5 mm
fuse max. 16 A, 230 V/50 Hz.
■ Accessory cables: NYM with the
required number of conductors for
the external connections.
■ Allow all cables in area "M" (see
page 7) to protrude 2000 mm from
the wall.
Preparing for installation
2 ,
9