4-5.Caution On Selecting Outdoor Units - Mitsubishi Electric PUHY-RP-Y(S)JM-B Data Book

4. Outdoor Installation
4-5. Caution on selecting outdoor units
Consult your dealer when the following issues on Y system are the key concern.
· Warm air may flow out from the indoor unit during heating Thermo-OFF.
· Refrigerant flow sound may occur in the rooms with low background noise such as hotel rooms, hospital rooms, bedrooms, or
conference rooms.
To avoid the above issues on Y system, changing board settings on the indoor and outdoor units is required.
Ask AC&R Works for details.
SYSTEM DESIGN 238