LEGALLAIS HB300 Manuel De Mise En Service, D'opération Et D'entretien page 52

HV - Cold water
MV - Hot water
E
- Electric heating
C
- Circulation pipe branch
KK - Condensation outlet
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
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
Figure 7.3.-1.
AND THE APPLIANCE.
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