9 Piping work and
refrigerant charge
TCGB0070 rev.3 - 04/2012
126
9.8 DHWT - Domestic Hot Water tank
9.8.1 Hydraulic circuit
When Piping connections are performed:
1
Connect all pipes as close as possible to the unit, so that disconnection can be easily performed when required.
2
It is recommended to use flexible joints for the piping of water inlet and outlet, so vibration will not be transmitted.
3
Whenever possible, sluice valves should be installed for water piping, in order to minimise flow resistance and to main
-
tain sufficient water flow.
4
It is recommended to apply ball valves in both water pipe connections to make easier any maintenance work.
5
Proper inspection should be performed to check for leaking parts inside and outside the system, by completely opening
the hot water inlet and outlet valves to the water condenser.
6
This DHWT must be fully air purged to avoid heating elements radiating the tank case without water.
7
Apply thermal insulation on the hydraulic system pipes in order to avoid accidental injure due to excessive heat on
piping surfaces and also to avoid heat losses.
8
When the unit is stopped during shutdown periods and the ambient temperature is very low, it is possible that the water
in the pipes and in the circulating pump freeze, thus damaging the pipes and the water pump. In order to prevent this,
during shutdown periods it is useful to empty the water from the installation.
N O T E
Check periodically:
• Water flow and pressure
• Water leakage’s
• Fixing points tightening
• Inlet and outlet connection pipes must be 1G”
DHWT(200/300)(E/S)-2.5H1E
Return
Input
Mains water
input
Recirculation
H.S.W.
Ref.
Name
Sanitary safety valve unit
Non-return valve
Heating coil
Recirculation pump
Shutoff cock
Drain
Drain valve
