DORCHESTER DR-RS 105, Инструкция по установке, наладке и обслуживанию

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Filling and draining
44 Instruction manual DR-RS
4
gis
The components referred to in these paragraphs are illustrated in Figure 4.1 .
4.2 Filling the water
heater
4.2.1 Filling unvented installations
To fill the water heater, proceed as follows.
1. Open the stop valve
i
in the hot water pipe and, if present, the stop valves
d
for the circulation pump.
2. Shut drain valve
g
.
Legend
a
pressure-reducing valve
(mandatory if the mains water
pressure exceeds 8 bar)
b
expansion vessel (mandatory)
c
T&P valve (mandatory)
c
a) safety valve
d
stop valve (recommended)
e
non-return valve (mandatory)
e
a) non-return valve
f
circulation pump (optional)
g
drain valve
h
gas valve (mandatory)
i
stop valve (mandatory)
j
temperature gauge
(recommended)
k
top to bottom recirculation
pump (optional)
l
top box
m
hot water draw-off points
n
condensation drainage
o
expension valve (mandatory)
p
water tank
q
float valve
r
3-way venting valve (optional)
s
overflow pipe
a
cold water supply
b
hot water outlet
c
circulation pipe
d
gas supply
e
flue gas discharge
Figure 4.1 Installation diagrams
UNVENTED
IMD-0066
m
d
f
e
d
d
k
e
d
l
c
j
i
h
o
n
e i a
b
g
b
a
c
d
e
VENTED
IMD-0065
d
k
e
d
i
m
r
s
p
i
a
i
j
e
l
c
h
d
g
d f e d
b
c