9 Piping work and
refrigerant charge
TCGB0070 rev.3 - 04/2012
127
9
9.8.2 Pressure drop
DHWT(200/300)E-2.5H1E
DHWT(200/300)S-2.5H1E
0
1
0.2
0.5
10
100
20
50
200
500
5
10
2
5
C
p
=
m
3
/h
mbar
0
1
0.2
0.5
10
100
20
50
200
500
5
10
2
5
C
p
=
m
3
/h
mbar
9.8.3
General standard for hydraulic installation
-
The safety valve unit will fitted at the sanitary water installation.
-
A pressure reducer must be placed in the DHWT installation. The nominal pressure of the safety unit will be 8 bar.
-
When the main pressure is more than 6 bar a pressure reducer should be installed.
-
The water discharge during heating (expansion) is normal. The volume of this discharge can be up to 3% of the
storage tank’s capacity.
-
The pressure regulator device must be working regularly , depending on the quality of water, in order to remove
the lime’s deposits and verify that it is not blockade.
-
A water leakage in the pressure protection device can exist. The discharge pipe should be always open to the
atmosphere, free of frost and in continuous slope to the down side.
-
Dielectric bushes must be fitted at the input and output sanitary water and at the tank circuit connections.
-
Emptying the DHWT: Close the main inlet water valve and open the relief valve of the security water group.
Ref
Name
Main inlet water
DHWT inlet connection
Security valve and manual empty
Emptying connection
Check valve
Close valve
