120
PMML0600 rev.0 - 06/2022
8
YUT
AKI H C
OMBI
MAINTENANCE
8.3.4 DHW pipes connection
The connection between the DHW installation and the DHW connections of the indoor unit must
be done taking into account the following considerations:
1 Install a pressure and temperature relief valve at the DHW inlet connec tion (as close as possi
-
ble to the tank) to provide the following functions.
• Pressure protection
•
Non-return function
•
Shut-down valve
• Filling
• Draining
If not, an specific device for each function should be installed.
2
Install also a shut-down valve (field supplied) in the DHW outlet connection, in order to make
easier any maintenance work.
NOTE
For more details, refer to the section
“5.5 Space heating and DHW for YUTAKI M / YUTAKI Hydrosplit”
8.3.4.1 Drain pipes connection
For a correct drainage, connect the drain pipe for the safety valve (located at the top rear side of
the unit) to the general draining system.
Safety valve
P&T relief valve
(Only for UK market)
NOTE
• The safety valve is activated when water pressure reaches 3 bars.
• Drain taps must be provided at all low points of the installation to permit complete drainage of
the circuit during servicing.
• P&T relief valve is activated when water pressure reaches 7 bar and/or water temperature
reaches 96ºC
