Mitsubishi Electric CAHV-R450YA-HPB Service Manual page 26

[ I Read Before Servicing ]
17. Regulatory requirements for safety
See below for information on installing a safety device.
*
Safety devices shall be regularly inspected, maintained, and replaced in accordance with relevant laws, regulations, and the instructions of the
manufacturers.
The requirements listed below were established based on IEC60335-2-40 (Edition 6.0) G.G.6. See the original standards for further information on
selecting a safety device.
Required items
Automatic air vent valve
Safety valve
HWE22020
Unit
Pump
* In the event of a failure of the waterside heat exchanger in the unit, the refrigerant may leak from the automatic air
vent valve, so install it in a place where the refrigerant will not accumulate, such as outdoors.
* In the event of a failure of the waterside heat exchanger in the unit, the refrigerant may leak from the safety valve, so
install it in a place where the refrigerant will not accumulate, such as outdoors.
Safety
valve
Closed
expansion tank
Note
- 17 -
Automatic air
vent valve
FCU etc
GB