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6.0 MULTIPLE INSTALLATION
6.1 When larger volumes of water are required than can be provided
by one heater, multiple installations can be made by connecting
a number of heaters in PARALLEL of the cold feed manifold
(See Figure 6). This is the ONLY method that is recommended
provided all heaters receive acceptable flow rates (2.5ltr/min
recommended). DO NOT plumb these heaters in series.
6.2 To set the heaters in this arrangement use the appropriate
procedure as described previously. Each heater in parallel must
be set individually.
6.3 In this application restrictors capable of closing flow completely
should be used so that as each heater is set in turn, the other
heaters in the installation may be isolated.
NOTE - In this application it is advisable especially where low flow
rates exist to plumb the cold manifold in 22mm pipe with 15mm pipe
spurs to each heater.
B - RESTRICTORS
D - EXPANSION RELIEF VALVES
E - SERVICE STOP VALVE
G
Figure 6
F - COLD WATER SUPPLY MANIFOLD
G - HOT WATER SUPPLY MANIFOLD
D
E
F
B
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