Technibel GRV79R5VAA Technical Data & Service Manual page 22

Indoor Unit MCAV127R5VAA
KPAV128R5TAA
Indoor unit
Insulation of Refrigerant Tubing
IMPORTANT
Because capillary tubing is used in the outdoor unit, both the
wide and narrow tubes of this air conditioner become cold. To
prevent heat loss and wet floors due to dripping of
condensation, both tubes must be well insulated with a
proper insulation material. The thickness of the insulation
should be a min. 8 mm.
CAUTION
Wide tube
service
Wide tube
valve
O.D.
ø12.7 mm
(1/2 ")
Narrow
tube
service
Narrow tube valve
O.D.
ø6.35 mm
(1/4")
After a tube has been insulated,
never try to bend it into a narrow
curve because it can cause the tube
to break or crack.
Outdoor Unit GRV129R5VAA
Outdoor unit
4-way
Muffler
valve
Capillary tube
Strainer
Check
valve
Thickness:
Min. 8 mm
18
Accumulator
Insulation
Wide tube
Cooling cycle
Heating cycle
Thickness:
Min. 8 mm
Narrow tube