Viessmann VITODENS 242-F Installation And Service Instructions Manual page 19

Preparing the installation
N Drain for DHW safety valve and/or
siphon air vent valve
O Condensate drain hose
(cont.)
N
O
Preparing for installation
2. Prepare the connections on the DHW
side. Install the safety assembly
(accessory or on-site provision) in the
cold water line in accordance with
DIN 1988 and EN 806 (see
page 20).
Recommendation:
Install the safety valve above the
DHW cylinder to protect it against
contamination, scaling and high tem-
peratures.
3. Prepare the solar connections.
4. Prepare the condensate connection
to the on-site drain line or siphon:
■ Drain towards the back:
See dimensions for condensate
hose O and position K in the dia-
gram on page 17.
■ Drain towards the side aperture:
See position L in diagram on
page 17.
5. Prepare the gas connection accord-
ing to TRGI or TRF [or local regula-
tions].
6. Prepare the electrical connections.
■ Power cable: NYM-J 3 x 1.5 mm
max. fuse rating 16 A,
230 V/50 Hz.
■ Accessory cables: NYM with the
required number of cores for the
external connections.
■ Allow all cables in area M in the
diagram on page 18 to protrude
2000 mm from the wall.
2
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