Viessmann VITODENS 200 WB2A, Installation & Servicing Instructions Manual

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a)
The Gas Supplier should be consulted at the installation planning stage in order
to establish the availability of an adequate supply of gas.
b)
An existing service pipe MUST NOT be used without prior consultation with
the gas supplier.
c)
A gas meter can only be connected by the gas supplier or by their contractor.
d)
An existing meter and / or pipework should be of sufficient size to carry the
maximum boiler input plus the demand of any other installed appliance.
(BS 6891: 1988). A minimum of 22 mm dia. pipework is required to within
1 metre of the appliance gas cock.
DOMESTIC HOT / COLD WATER SUPPLY TAPS AND MIXING TAPS. All equipment designed for
use at mains water pressure is suitable.
SHOWERS AND BIDETS. Any mains pressure shower or bidet complying with the Local Water
Authority regulations is suitable.
a)
Check that the mains water pressure is sufficient to produce the required
DHW flow rate, but does not exceed the maximum DHW pressure (10 bar).
If necessary, a pressure reducing valve must be fitted to the mains supply
before the DHW inlet connection.
b)
The final 600 mm (24 in) of the mains supply pipe to the boiler must be copper.
c)
A regulator is fitted to control the maximum water flow rate.
d)
If the appliance is installed in an area where the temporary hardness of the
water supply is high (over 150 ppm) the fitting of an in line scale inhibitor
may be an advantage. Consult the Local Water Authority if in doubt.
e)
For specific information relating to fittings (eg. Showers, washing machines
etc) suitable for connection in the DHW circuit, consult the Local Water
Authority. However, the following information is given for guidance.
3 Installation Requirements
3.6 Domestic Hot Water System (Combi Boiler Only)
3.7 Gas Supply
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