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

Page: 44 / 72

Filling and draining
44 Instruction Manual SCE
4
gis
4.2 Filling the appliance
4.2.1 Filling unvented installations
To fill the appliance, follow the instructions below.
1. Open the stop valve
i
on the hot water pipe and, if present, the stop
valves
d
for the circulation pump.
2. Shut off the drain valve
g
.
3. Open the adjacent drainage point
m
.
4. Open
a
the supply cock
i
on the cold water side so that cold water runs into
the appliance.
5. Completely fill the appliance (when water is spouting out of the adjacent
drainage point, then the appliance is full).
6. Bleed the entire installation, for example, by opening all hot water draw-off
points.
7. The appliance is now under water supply pressure. No water can now come
out of the overflow valve
n
and the T&P-valve
c
. If this is the case then it
may be that:
-
The water supply pressure pressure is greater than the stipulated 8
bar.
Then fit a pressure reduction valve
a
.
- The overflow valve for the inlet combination is faulty or has been
incorrectly fitted.
4.2.2 Filling vented installations
To fill the appliance, follow the instructions below.
1. Open the stop valve
i
on the hot water pipe and, if present, the stop
valves
d
for the circulation pump.
2. Shut off the drain valve
g
.
3. Open the adjacent drainage point
m
.
4. Open
a
the supply cock
i
on the cold water side so that cold water runs into
the appliance.
5. Completely fill the appliance (when water is spouting out of the adjacent
drainage point, then the appliance is full).
6. Bleed the entire installation, for example, by opening all hot water draw-off
points.
7. The appliance is now under water supply pressure. No water may now come
out of the T&P-valve
c
. If there is water coming out, the T&P-valve might be
incorrectly fitted or defective.
4.3 Draining the
appliance
4.3.1 Draining unvented installations
For some procedures it is necessary to drain the appliance. The procedure is as
follows:
1. Put the appliance out of operation by setting the I/0/II- switch to the
0
position .
2. Switch off the power to the appliance by setting the main switch between the
appliance and the mains power supply to its 0 position.
3. Switch off the gas supply
h
.
4. Shut off the stop valve
i
in the hot water pipe.
5. Shut off the supply cock on the cold water supply pipe
a
.