20
EN
Specifications are subject to change without notice.
© 2022 Mitsubishi Electric US, Inc.
11.1. Insulation
To avoid dew drops, provide sufficient anti-sweating insulation
to the refrigerant and drain pipes. When using commercially
available refrigerant pipes, be sure to cover with available
insulating material with heat-resistant temperature of more than
100 °C [212 °F] and thickness given below, on both liquid and gas
pipes. Insulate all indoor pipes with polyethylene insulation with a
minimum density of 0.03 and a thickness as specified in the table
below.
Pipe size
Insulation thickness
6.4 mm to 25.4 mm [1/4 to 1 in.]
>10 mm [7/16 in.]
28.6 mm to 38.1 mm [1-1/8 to 1-1/2 in.]
>15 mm [5/8 in.]
-If the unit is used on the highest story of a building and under
high temperature and high humidity, it is necessary to use thicker
insulation than specified in the table above.
-If there are customer’s specifications, please follow them.
11.2. Piping size
Model
PVFY-NAMU-E1
08 -18
24-30-36-48-54
Refrigerant
pipe
Liquid pipe
6.35 mm [1/4] 9.52 mm [3/8]
Gas pipe
12.7 mm [1/2] 15.88 mm [5/8]
Drain Pipe
O.D. 32 mm [1-1/4]
