No closing valve may be built-in between the water heater and return
safety valve, because with it the pressure protection would be impeded!
The heater can be connected to the domestic water supply network without a pressure-
reducing valve if the pressure in the network is lower than the nominal pressure. If the
pressure in the network exceeds the nominal pressure, a pressure-reducing valve must be
installed.
Before connecting it to the power supply, the water heater must be filled
with water.
When filling the heater for the first time, the tap for the hot water on the mixing tap
must be opened. When the heater is filled with water, the water starts to run through
the outlet pipe of the mixing tap.
Fig. 3:
Closed (pressure) system
Fig. 4:
Open (non-pressure) system
LEGEND
1
Pressure mixer taps
2
Expansion tank
3
Safety valve
a
- Test valve
b
- Non-return valve
4
Funnel with outlet
connection
5
Checking fitting
6
Pressure reduction valve
7
Closing valve
8
Non-return valve
9
Low pressure mixer tap
H
Cold water
T
Hot water
H
T
T
H
1
2
3
4
a
b
5
6
7
7
8
9
H
T
T
H
1
2
3
4
a
b
5
6
7
7
8
9
489390
15
EN
Summary of Contents for FTG 30-100 E5
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