Mitsubishi SKM32ZA Specifications Page 40
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(2) Connection of refrigerant piping
¡ The service valve corresponding to each indoor unit is as illustrated in the right figure.
¡ Regarding the change in the sizes of gas side pipes (usage of the variable joints); if a 3.2/
4.0/5.0 kW class indoor unit (gas side pipe 12.7) is going to be connected to the rooms A
and B service valves (9.52), or if a 2.2-2.8 kW class indoor unit (gas side pipe 9.52) is
going to be connected to the rooms C service valves (12.7), variable joints (1, 2) avail-
able as accessories must be applied to the gas side service valves.
[Examples of use of variable diameter joints]
Connection of indoor unit of Class 3.2 to A unit.
¡ Securely fit the copper packing between the service valve and the variable diameter joint to prevent shifting.
¡ Cover the pipes with tape so that dust and sand do not enter the pipe until they are connected.
[Connection of pipes]
¡ When connecting the pipes to the outdoor unit, be careful about the discharge of fluorocarbon gas or oil.
¡ Make sure to match the pipes between the indoor unit and the outdoor unit with the correct service valves.
(1) Preparations
¡ Remove the flare nut (from both
liquid and gas sides).
¡ Remove the flare nut (from both
liquid and gas sides).
¡ Fit the removed flare nut to the joint pipe, and then flare it.
A dimensions
Liquid side: ø 6.35:9 ~9.5dia
Gas side:
ø 9.52: 13.2 ~ 14dia
ø 12.7: 16.2 ~ 17dia
Gas
Gas
side
service
valve
Liquid
Liquid
side
service
valve
Service valve
for room C
Service valve
for room B
Service valve
for room A
ø12.7
ø9.52
ø9.52
ø6.35 pipe
ø12.7 pipe
Indoor unit
3.2 kW class
Liquid side operational valve (ø6.35)
Gas side service
valve (ø9.52)
Copper packing Variable diameter joint (ø9.52-ø12.7)
Service
valve for room A
Indoor
Remove
Push
Outdoor
Remove
Push
90+0.5˚
A
4.5.6 Refrigerant Piping
(1) Limit
The maximum permissible length of the refrigerant pipes for the outdoor units, and the maximum permissible height difference for
the outdoor units are as shown below.
* If the total length for all the rooms exceeds the length of chargeless refrigerant pipe, additionally charge with refrigerant accord-
ing the item 4.
¡The diameter of the refrigerant pipe:
¡Outdoor unit and the total connectable indoor units (class kW):
Lower installation spot of the indoor unit A
Upper installation spot of the indoor unit B
Maximum height difference of the indoor units C
Length for one indoor unit
Total length for all rooms
Length of chargeless refrigerant pipe*
SCM68ZA, SCM68YA
under 25m
under 40m
under 15m
under 10m
under 25m
30m
Height
difference
Liquid side
Gas side
2.2 · 2.5 · 2.8kW
ø 9.52 · t 0.8
3.2 · 4.0 · 5.0kW
ø 12.7 · t 0.8
ø 6.35 · t 0.8
Class of indoor unit (kW)
Diameter of joint pipe
A
B
C
Model
SCM68ZA
SCM68YA
Total of indoor units (class kW)
9.6kW
12.0kW
- ROOM AIR-CONDITIONER 1
- (Air to air heat pump type) 1
- CONTENTS 2
- 4.1 GENERAL INFORMATION 3
- 4.2 SELECTION DATA 4
- Models SKM32ZA, 40ZA, 50ZA 5
- (b) Ceiling recessed type 6
- Model SCM68ZA 7
- (b) Cooling 9
- 4.2.3 Exterior dimensions 11
- Model SKM50ZA 12
- Models SKM32ZA, 40ZA 12
- Model SRRM40ZA 13
- • Details of air outlet 13
- 4.2.4 Piping system 14
- 4.2.5 Selection chart 15
- 4.3 ELECTRICAL DATA 16
- I-A ThI-R 17
- (2) Outdoor unit 18
- Model SCM68ZA 18
- INVERTER 19
- RUN HI POWER ECONOTIMER 20
- Outdoor air temperature 24
- 22°C24°C 24
- 1 minute 29
- 1 minute 55 seconds 29
- 4.5 APPLICATION DATA 31
- SAFETY PRECAUTIONS 31
- Unit: mm 32
- Drain hose 33
- Left Side Piping 34
- Right Side Piping 34
- ConcreteHoled anchor 35
- Holed plug 35
- Suspension 35
- Battery 36
- CURRENT LIMIT SW 38
- 4.5.5 Electrical wiring 39
- 4.5.6 Refrigerant Piping 40
- Liquid side 41
- Gas side 41
- Name Qty 45
- Air outlet grille 45
- Pan-head screws 45
- Air flow (m 49
- 4 Tapping screw 50
- 2 Drain hose 50
- 4.6 MAINTENANCE DATA 52
- Thermistor error 54
- Current cut 54
- Over current 55
- Power transistor overheat 55
- Compressor overheat 55
- Indoor fan motor error 56
- Drain abnormality 56
- (a) Diagnosis procedure 58
- CAUTION – HIGH VOLTAGE 59
- 4.6.2 Servicing 60
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