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ACV HP300 Seite 35

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The combined safety valve must be connected to the cold water branch considering the flow direction
indicated by the arrow. The maximum distance between the appliance and the valve is 2 m, and two bends (arc,
knee) are permitted. . The appliance has to be equipped with safety valve controlled for an operation pressure of
max. 7 bar. The safety valve has to be mounted directly before the tank onto the cold water pipe branch, in a
frost-free environment. The drainage pipe has to be connected to the safety valve in a way that it is always
directed downwards and located in a frost-free environment. The feeding pressure of incoming cold water must
not exceed 5.25 bar pressure in case of valve with operation pressure of 7 bar. In case of valve with lower
pressure values, maximal feeding pressure has to be defined concerning mini-maxi tolerance limits of the safety
valve. If it exceeds this value, pressure reduction device should be connected in front of the safety valve.
The safety valve is not an accessory of the appliance.
IT IS FORBIDDEN TO BUILD WATER PIPELINE FITTING BETWEEN THE VALVE AND THE
APPLIANCE.
Before mounting the valve, the cold water pipeline must be flushed thoroughly, in order to avoid any
damage caused by any possible pollution. The combined safety valve contains a one-way valve. Therefore, it is
not needed to mount a separate one-way valve. During the heating, the expanding water has to leak through the
drainage pipe branch of the combined safety valve. During installation of the valve, one should pay attention to
ensure that this leaking remains visible.
IT IS FORBIDDEN TO CLOSE THE DRAINAGE PIPE BRANCH OR TO DIVERT WATER
LEAKING IN A NON-VISIBLE WAY.
If the pipeline system pressure exceeds the value of 0.6 MPa – only in a temporary way -, a pressure
reduction valve has to be mounted in front of the hot water tank, at the location of item
No. 3 as described in Figure 7.3.-1. In case of lacking pressure reduction valve, the safety valve will leak
besides heating under this pressure. It is the task of the user to purchase and mount the pressure reduction valve.
If the combined safety valve is connected to the hot water tank without the reducing device, in order to
discharge the hot water tank, a discharge faucet or valve should be mounted to the cold water pipe of the
appliance, adding a standard T-shaped fitting. It is the task of the user to purchase the valve (faucet). An
arbitrary number of taps and mixing faucets can be mounted on the hot water tank. It is rational to block the
flow back of the hot water through the outlet towards the cold water pipeline system by mounting a one-way
valve in the cold water pipe in front of the taps. A closing valve needs to be mounted in the cold water pipeline
leading to the tank in front of the fittings (combined safety valve, one-way valve, etc.) With the help of this
closing valve, both the hot water tank and the water pipeline fittings can be disconnected from the water
pipelines system (in case of failure or other maintenance work).
7.4. Electric connection
1. The hot water tank should be connected to the electric system only through permanent connection. It
is forbidden to apply any wall socket.
2. The current of the electric system has to be connected to the hot water tank through an all-pole
disconnection device, which has at least 3mm separation distance in all poles.
HV
- Cold water
MV
- Hot water
E
- Electric heating
HB
- Heating agent inlet from heat exchanger
or external heat exchanger (in case of
type HB300C)
HK
- Heating agent outlet from heat
exchanger or external heat exchanger (in
case of type HB300C)
C
- Circulation pipe branch
KK
- Condensation outlet
1
- Closing valve
2
- Manometer
3
- Pressure reducing valve
(only above water pipeline
pressure above 0,6 MPa)
4.
- Y filter
5
- Combined safety valve
6
- Drain outlet (into sewage
system)
7
- Discharge valve
8
- Faucet (with shower)
9
- Faucet
10
- One-way valve
… 35 …

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