DORCHESTER DR-RS 105, Installation, Commissioning And Servicing Instructions

Page: 24 / 64

Installation
24 Instruction manual DR-RS
3
is
Legend
a
pressure-reducing valve
(mandatory whenever 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 ()
s
overflow pipe
a
cold water supply
b
hot water outlet
c
circulation pipe
d
gas supply
e
flue gas discharge
Figure 3.3 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