Heatrae Sadia Multipoint Instantaneous, Инструкция по монтажу

Страница: 9 / 16

9
Multiple installation
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, below). 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.
To set the heaters in this arrangement use the
appropriate procedure as described previously. Each
heater in parallel must be set individually.
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 if low flow rates exist to
plumb the cold manifold in 22mm pipe with 15mm
pipe spurs to each heater.
A double-pole isolating switch (rated at 30A for 7kW
and 40A for 9kW), with a contact separation of at
least 3mm in each pole, must be incorporated in
the circuit. This must have a mechanical indicator
showing when the contacts are open. An indicator
lamp alone is not sufficient. Only cord operated
switches can be fitted in bathrooms.
Cable entry
Cable entry can be from the rear (see figure 5,
below) or from the bottom. When opting for bottom
entry make the cut-out to suit the cable before the
fitting back plate to the wall.
Make cut-out
using sharp knife
Figure 5
Place the cover onto the back plate.
Secure the cover to back plate using screw provided.
B - Restrictors F - Cold water supply manifold
D - Expansion relief valves G - Hot water supply manifold
E - Service stop valve
B
D
E
F
G
Figure 6