Sanyo 24KHS72 Service Manual - Page 18

Refrigerant Flow Diagram - split a c heat

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4. REFRIGERANT FLOW DIAGRAM 4-1. Refrigerant Flow Diagram Indoor Unit KHS1872 KHS2472 Outdoor Unit CH1872 CH2472 Indoor unit Wide tube Wide tube service valve *1 Muffler Outdoor unit Accumulator High pressure switch H.P. 4-way valve Compressor Heat exchanger Heat exchanger Narrow tube Narrow tube service valve Capillary tube for Electric split flow expansion valve M O.D. 1/4" (6.35 mm) Strainer *1 O.D.1/2"(12.7 mm) ......... 1872 class O.D.5/8"(15.88 mm) ......... 2472 class Cooling cycle (Defrosting cycle) Heating cycle 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 Thickness: Min. 5/16"(8 mm) should be a min. 5/16"(8 mm). CAUTION 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. Wide tube Insulation Thickness: Min. 5/16"(8 mm) Narrow tube 18

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Compressor
4-way
valve
Accumulator
High pressure
switch
Wide tube
service
valve
Wide tube
Narrow
tube
service
valve
Narrow tube
Heat exchanger
Heat exchanger
Muffler
Capillary
tube for
split flow
Cooling cycle
(Defrosting cycle)
Heating cycle
Indoor unit
Outdoor unit
Electric
expansion
valve
Strainer
M
*1
*1
O.D.1/2"(12.7 mm)
O.D.5/8"(15.88 mm)
1872 class
2472 class
.........
.........
O.D.
1/4"
(6.35 mm)
H.P.
4.
REFRIGERANT FLOW DIAGRAM
4-1.
Refrigerant Flow Diagram
Indoor Unit
KHS1872
KHS2472
Outdoor Unit
CH1872
CH2472
Insulation of Refrigerant Tubing
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. 5/16"(8 mm).
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.
Wide tube
Thickness:
Min. 5/16"(8 mm)
Insulation
Narrow tube
Thickness:
Min. 5/16"(8 mm)
IMPORTANT
CAUTION
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