Connection To The Water Supply - chromagen GR30 Manual De Instalacion Y Uso

A
GR30 472
GRU50 574
GRU80 779
GRU100 939
GRU150 1309
GRU200 1518
installation dimensions of the water heater in mm

3.- CONNECTION TO THE WATER SUPPLY

The water heater connections for the in-flowing and out-flowing water are colour-coded. The connection for the
supply of cold water is coloured blue, while the hot water outlet is coloured red. The water heater may be
connected to a closed-circuit pressure system which enables several points of use. For safety reasons the supply
pipe must be fitted with a return safety valve or alternatively, a valve of the safety class that prevents the pressure
in the tank from exceeding the nominal pressure by more than 0.1 MPa. The heating of water in the heater causes
the pressure in the tank to increase to the level set by the safety valve. As the water cannot return to the water
supply system, this can result in the dripping from the outlet of the safety valve. The drip can be piped to the drain
by installing a catching unit just below the safety valve. The drain installed below the safety valve outlet must be
piped down vertically and located in the environment that is free from the onset of freezing conditions. In case the
existing plumbing does not enable you to pipe the dripping water from the return safety valve into the drain, you
can avoid the dripping by installing a 3-litre expansion tank on the inlet water pipe of the boiler. You should ensure
that the return safety valve is functioning properly by checking it on a regular basis i.e. every 14 days. To check
the valve, you should open the outlet of the return safety valve by turning the. The valve is operating properly if
the water comes out of the nozzle when the outlet is open.
C
Legend:
1- Return safety valve
2- Checking valve connection
3- Non-return valve
4- Pressure reduction valve
5- Closing valve
B C D
275 173 -
365 185 145
565 190 345
715 200 495
1065 220 845
1050 444 800
F
6- Checking fitting
7- Funnel with outlet connection
H - Cold water
T - Hot water