Viessmann VITODENS 100-W Manual page 26

Montagevorbereitung
Montagevorbereitung
H Bypass with Lockshield Valve
K Control unit
L Room temperature control (on
site)
Connection of Viessmann Vitotrol
100 see page 39
M Fuse 3 A
N Mains ON/OFF switch
Gas Supply
The Gas Supplier should be consul-
ted at the installation planning stage
in order to establish the availability
and supply of an adequate supply of
gas.
A gas meter can only be connected
by the gas supplier or by their con-
tractor.
An existing meter and / or pipework
should be of sufficient size to carry
the maximum boiler input plus the
demand of any other installed appli-
ance. (BS 6891: 1988). A minimum
of 22 mm dia. pipework is required
to within 1 metre of the appliance
gas cock.
Electricity Supply
Wiring external to the appliance
must be in accordance with BS
7671 (the current I.E.E Wiring
Regulations) for electrical installa-
tion and any local regulations which
apply.
The mains cable must be at least
2
0.75 mm (24/0.2 mm) PVC insula-
ted to BS 6500 table 16.
26
(Fortsetzung)
P Connection box (not supplied)
sÖ Circulation pump
fÖ Power supply
gH Mains connection accessories/
room temperature control
LR Connection of room temperature
control
The governor at the meter must give
a constant outlet pressure of 21
mbar +/- 1mbar. when the appliance
is running.
The gas supply line should be pur-
ged prior to commissioning.
Warning: Before purging open all
doors and windows, also extinguish
any cigarettes, pipes and any other
naked lights.
The installation must be tested for
gas soundness on completion of the
work.