Gas Connection; Flue System - State Water Heaters PRV 30 NORS G Installation And User Instructions Manual

Figure 4 - Connection diagram
(unvented system)
Installation should be carried out
generally as shown on the following
diagram. See figure 4.
'STATE WATER HEATERS' are tested to
a maximum pressure of 12 bar and a
maximum working pressure of 8 bar.

2.1.3 Gas connection

The gas supply to this appliance must
be installed in accordance with BS 6891
(1988).
Fit the ½" gas supply cock supplied
with this unit immediately before the gas
control block. No heat or soldered joints
should be applied in the vicinity of the
gas control block, as they could cause
damage to the control.
12
1) Manual gas valve
2) Stop valve
3) Expansion vessel
4) T&P safety valve
5) Non return valve
6) Circulation pump
7) Drain valve
8) Pressure reducing valve
9) Expansion valve
A ) Gas supply
B) Hot water outlet
C) Cold water supply
D) Hot water draw off
points
E) Return circulation loop
IMD 0581
All connections and joints should be
tested for gas soundness with a
suitable leak detector (do not use a
naked flame).

2.1.4 Flue system

The water heater should be fitted with a
flue system connected to the draught
diverter. The flue pipe should rise for at
least 50 cm. vertically before the
inclusion of any bends. If a horizontal
run of flue is required this should be
kept to the minimum length possible and
incorporate a rise of 6 cm. per metre of
run. A split clip or flange should be
provided in the flue close to the draught
diverter for ease of servicing.