Outdoor Unit Draining Operation - Hitachi YUTAKI M RASM-3WF2E Installation And Operation Manual

5.1 Outdoor Unit Draining Operation

YUTAKI M has no drain port factory supplied. It is highly recommended to install a drain port valve
attached to the water outlet of the YUTAKI M unit in order to ease the operation of draining. When
the drain port is installed the draining procedure for the YUTAKI M follows the next steps:
1 Switch OFF the main power of the unit.
2 Close the shut-off valve installed at the water inlet connection (field supplied).
3 Connect a pipe or a drain hose to the drain port (field supplied) placed in the water outlet pipe
of the unit.
4 Open manually the drain port of the shut-off valve (field supplied), and collect the water into a
bucket (or to a sewage system)
5 Once all the water has been drained, and all maintenance operations have been finished, close
again the drain port and open again the valve of the water inlet pipe to restart the normal
operation of the unit.
5.2 Hydraulic Connections
Item
A Piping connections
B Piping connections
E Piping connections
F Piping connections
G Piping connections
H Piping connections
1 Field supplied
2 Field supplied
3 Field supplied
4 Field supplied
5 Field supplied
PMEN0657 rev.0 - 02/2024
Nature Part Name
Outdoor Heat pump water outlet
Outdoor Heat pump water inlet
DHW coil inlet
DHW coil outlet
Water inlet (DHW)
Water outlet (DHW)
Shut-off valve
Shut-off valve
Shut-off valve
Water check valve
Pressure and check valve (field supplied)
5
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