Rheem RIWH18AVFJ, Design & Technical Manual, Page: 40 / 51

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Outdoor unit installation in multi-row
Unit: in (mm)
Single parallel unit arrangement Multiple parallel unit arrangement
6 (150) or more
24 (600) or more
40 (1,000) or more
79 (2,000) or more
20 (500) or more
24 (600) or more
60 (1,500) or more
10 (250) or more
119 (3,000) or more
10 (250) or more
60 (1,500) or more
20 (500) or more
10 (250) or more
NOTES:
• If the space is larger than stated above, the condition will be the same as when there is no
obstacle.
• Height above the floor level should be 2 in (50 mm) or more.
• When installing the outdoor unit, be sure to open the front and left side to obtain better opera-
tion efficiency.
CAUTION
• Do not install the outdoor unit in two-stage where the drain water could freeze. Otherwise the
drainage from the upper unit may form ice and cause a malfunction of the lower unit.
• When the outdoor temperature is 32 °F (0 °C) or less, do not use the accessory drain pipe
and drain cap. If the drain pipe and drain cap are used, the drain water in the pipe may
freeze in extremely cold climate. (For reverse cycle model only.)
• In area with heavy snowfall, if the inlet and outlet of the outdoor unit is blocked with snow, it
might become difficult to get warm, and it is likely to cause product malfunction. Construct a
canopy and a pedestal, or place the unit on a high stand that is locally installed.
DESIGN & TECHNICAL MANUAL
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OUTDOOR UNIT ROSH18-24AXFWJ