Viessmann B1HF Installation And Service Instructions Manual page 12

Preparing for installation
Preparing for installation
Dimension for siting with DHW cylinder below the
H
boiler
Dimension: 161 mm – for external wall connection,
K
Order nos. 7441467, 7411961
Dimension: 131 mm – for external wall connection,
Order no. 7946886 (with reduced flue bend)
Note
This boiler (IP rating: IP X4) is approved for installation
in wet rooms inside safety zone 1. Exposure to jets of
water must be prevented.
For open flue operation, the boiler may only be oper-
ated with a splash cover.
1. Subject to order: Fit supplied pre-plumbing jig,
mounting frame or wall mounting bracket in the rel-
evant installation location.
Installation instructions for pre-plumbing jig
or mounting frame
Note
Check the condition of the wall where the boiler is
to be installed. For the suitability of the supplied
rawl plugs for various building materials, see man-
ufacturer's instructions: Fischer expansion plugs
SX 10 x 80
For other construction materials, use fixing materi-
als with sufficient load bearing capacity.
2. Prepare the water connections to the valves/fittings
of the mounting bracket.
Thoroughly flush the heating system.
!
Please note
To prevent appliance damage,
connect all pipework so that it is free of load
and torque stress.
Note
If an on-site expansion vessel also has to be instal-
led: Install this expansion vessel in the cylinder
return, as the 3-way diverter valve is located in the
heating flow.
Not possible with type B1KF
12
(cont.)
3. Prepare the gas connection according to TRGI or
4. Prepare the electrical connections.
TRF [or local regulations].
The appliance is delivered fitted with a power
■
cable (approx. 2 m long).
Note
Connect the power cable to the electricity supply
using a fixed connection.
■ Power supply: 230 V, 50 Hz, fuse rating
max. 16 A
■ Accessory cables: 0.75 mm
with required number of cores for external con-
nections
2 flexible PVC cable