State Water Heaters SCE 65-400, Installation, User And Service Manual

Page: 43 / 72

Introduction
Release R.1.0 Uk 43
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4 Filling and draining
4.1 Introduction
The following will be examined in turn in this chapter:
•
Filling the appliance .
• Draining the appliance .
Reference is made in these sections to the components as illustrated in
Figure 4.1 .
Legend
a
pressure reduction valve
(obligatory)
b
expension vessel
(obligatory)
c
T&P valve
(obligatory)
d
stop valve
(recommended)
e
non-return valve
(obligatory)
f
circulation pump
(optional)
g
drain valve
h
gas valve
(obligatory)
i
stop valve
(obligatory)
j
temperature gauge
(recommended)
k
shunt pump
(optional)
l
draught diverter
m
hot water draw-off points
n
pressure overflow valve
(obligatory)
o
water reservoir
p
float switch
q
3-way venting valve
(recommended)
r
overflow pipe
a
cold water supply
b
hot water outlet
c
circulation pipe
d
gas supply
e
flue gas outlet
Figure 4.1 Connection diagrams
13
UNVENTED
IMD-0146
A
VENTED
IMD-0147
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