Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 340

MAINTENANCE
RWM-(4.0-10.0)N1E
1 Remove the indoor unit service cover as explained above.
2 Unscrew the 4 front screws of the electrical box cover and then, remove it.
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C A U T I O N
Take care with the electrical box components in order to avoid damaging it.
13.1.1.3 Space heating pipes connection
The unit is factory supplied with two shut-off valves which have to be connected to the water inlet / outlet connections. With these
shut-off valves it is very practical to connect the indoor unit to the heating system by using the factory supplied gaskets just below
the valves (G 1" connection for 2.0-3.0HP; G 1-1/4" connection for 4.0-10.0HP). Then, the space heating installation can be carried
out.
13.1.1.4 Drain pipes connection
For a correct drainage, connect the drain pipe for the safety valve to the general draining system.
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N O T E
• 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.
326 PMML0575 rev.2 - 03/2022
Gaskets
Shut-off valves