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

Page: 26 / 72

Installation
26 Instruction Manual SCE
3
is
3.6 Water connections
Unvented
3.6.1 Cold water side
See
a
in Figure 3.2 .
1. On the cold water side fi
t
an approved stop valve
i
in accordance with the
regulations in force.
See also paragraph
’1.3 Regulations’ .
2. The maximum working pressure of the appliance is 8 bar. Because the
pressure in the water pipe might sometimes be higher than 8 bar, you will
have to fit an approved pressure pressure reduction valve
a
.
3. Fit a non-return valve
e
and an expension vessel
b
.
4. Fit a pressure pressure overflow valve
n
and connect the overflow side to
an open water drain pipe.
3.6.2 Shunt pipe
You can connect a shunt pump to prevent stacking of the water in the
waterheater.
1. Optional: fit a shunt pipe depending on the tap design (Ø 22 mm), a stop
valve
i
and a shunt pump shunt pump
k
.
2. Fit a non-return valve
e
.
3. Fit a stop valve
i
.
3.6.3 Hot water side
See
b
in Figure 3.2 .
n
Remark
Insulating long hot water pipes prevents unnecessary energy loss.
1. Fit the T&P valve
c
.
1. Optional: fit a temperature gauge
j
to check the temperature of the tap
water.
2. Fit a stop valve
i
in the hot water outlet pipe for servicing.
3.6.4 Drain valve
1. Fit the standard drain valve
g
supplied.
2. Refer to paragraph 3.6.5 if a circulation pipe is to be fitted. Otherwise, fit the
sealing nut supplied with the drain valve complete with packing. See
Figure 3.3 .