A.O. Smith 28 30 50 60, Инструкция по установке и обслуживанию

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Water connections, Unvented
Release R.1.3 UK 25
is
3.6 Water connections,
Unvented
3.6.1 Cold water side
See
a
in Figure 3.3 .
1. Fit an approved stop valve
i
on the cold water side as required by
regulations.
Refer also to paragraph
’1.3 Regulations’ .
2. The maximum working pressure of the appliance is 8 bar. Because the
pressure in the water pipe at times can exceed 8 bar, you must fit an
approved pressure-reducing valve
a
.
3. Fit a non-return valve
e
and an expansion vessel
b
.
4. Fit a pressure relief valve
m
and connect the overflow side to an open
wastewater pipe.
3.6.2 Hot water side
See
b
in Figure 3.3 .
n Remark
Insulating long hot water pipes prevents unnecessary energy loss.
1. Optional: fit a temperature gauge
j
to be able to check the temperature of
the tap water.
2. Fit the T&P valve
c
.
3. Fit a stop valve
i
in the hot water outlet pipe, for use when servicing.
3.6.3 Circulation pipe
See
c
in Figure 3.3 .
If an immediate flow of hot water is required at draw-off points, a circulation
pump can be installed. This improves comfort and reduces water wastage.
1. Fit a circulation pump
f
of the correct capacity for the length and resistance
of the circulation system.
2. Fit a non-return valve
e
behind the circulation pump to guarantee the
direction of circulation.
3. Fit two stop valves
d
for service purposes.
4. Connect the circulation pipe to the cold water supply pipe.
3.6.4 Condensation drainage
1. Fit a sloping wastewater pipe to the siphon
k
for condensation drainage and
connect this to the wastewater discharge in the boiler room.
c
Note
All piping behind the siphon must be condensation-resistant.