4-5.Caution On Selecting Outdoor Units - Mitsubishi Electric CITY MULTI PEFY-P22VMS-E-S Data Book

4. Outdoor Installation
C7-R Rev.
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 4 - 66