11
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 delivery
C) Cold water inlet
D) Hot water taps
E)
Return circulation
Figure 6 - Connection diagram un-vented systems
Un-vented system
(see figure 6)
To install a Dorchester water heater on an un-vented cold
water supply system a kit of valves and fittings (WRAS
approved) must be used. Installation must be carried out
generally as shown on figure 6.
1119
Содержание DR-SA 16
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