AYAP7FHR
5 – 1
AYAP7FHR
Service Manual
CHAPTER 5.
REFRIGERATION CYCLE AND PERFORMANCE CURVES
[1] REFRIGERATION CYCLE
1. Refrigeration cycle
1.1. AY-AP7FHR
1.2. AY-AP9FHR
2. Standard conditions
*
REFRIGERANT PIPE LENGTH 5m
3. Temperature at each part and pressure in 3-way
valve
4. Dimension of Capillary tube
1
4
C
2
Capillary
tube A
Capillary
tube B
Capillary
tube C
(2 pieces)
Accumulator
3
Heating
Cooling
Outdoor unit
Condenser
Evaporator
Indoor unit
Reverse valve
Comp-
ressor
Flare coupling
Flare coupling
3-way
valve
2-way
valve
Silencer
Coil
1
4
C
2
Capillary
tube A
Capillary
tube B
Accumulator
3
Heating
Cooling
Outdoor unit
Condenser
Evaporator
Indoor unit
Reverse valve
Comp-
ressor
Flare coupling
Flare coupling
3-way
valve
2-way
valve
Silencer
Coil
Cooling
Heating
Indoor side
Dry-bulb Temp.
27
°
C
20
°
C
Relative Humidity
47%
–
Outdoor side
Dry-bulb Temp.
35
°
C
7
°
C
Relative Humidity
40%
87%
Model
AY-AP7FHR
AY-AP9FHR
NO. Condition
Cooling
Heating
Cooling
Heating
1
72
°
C
69
°
C
72
°
C
75
°
C
2
42
°
C
2
°
C
42
°
C
2
°
C
3
12
°
C
31
°
C
12
°
C
33
°
C
4
13
°
C
7
°
C
11
°
C
4
°
C
3-way valve
pressure
(MPaG)
1.03
2.25
0.95
2.35
Model
AY-AP7FHR
AY-AP9FHR
O.D
I.D
L
O.D
I.D
L
Capillary tube A
φ
2.7
φ
1.3
600
φ
2.7
φ
1.3
250
Capillary tube B
φ
2.7
φ
1.3
500
φ
2.7
φ
1.3
850
Capillary tube C
φ
2.7
φ
1.5
150
–
–
–