Refrigerant Piping - Mitsubishi SCM80ZA Manual

(d) Use the power supply wires specified below. Different wires may cause heat generation and fire. Do not to use unspecified
wires.
Never bundle, wind or treat the power wires. Otherwise, heat or fire may be generated.
Use cables for interconnection wiring to avoid loosening of the wires.
CENELEC code for cables Required field cables.
H05 RNR3G4.0 (Example)
H Harmonized cable type
05 300/500 volts
R Natural-and/or synth. rubber wire insulation
N Polychloroprene rubber conductors insulation
R Stranded core
3 Number of conductors
G One conductor of the cable is the earth conductor (yellow/green)
4.0 Section of copper wire (mm
[POWER SUPPLY CODE]
CENELEC code for cables required field cables.
H05RNR3G 4.0
(e) After connecting the power supply wires, make sure to secure the wires with wiring clamps.
(2) Connecting the outside/inside crossover wires
(a) Ensure that crossover wiring is matched with crossover piping in A,B and C rooms.
(b) The length of the crossover wires should be under 25 m. If it longer than 25 m, signal errors between the units may occur and
cause the operation to shut down.
(c) Use the crossover wires specified below. Different wires may cause heat generation and fire. Do not to use unspecified wires.
[INTERCONNECTING WIRING CODE]
CENELEC code for cables required field cables.
H05RNR4G 1.5
(d) Make sure the terminal numbers on the terminal board of the indoor and outdoor connections are correct.
(e) After connecting the crossover wires to the terminal board, use wiring clamps to secure the wiring.

3.5.6 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.
Length for one indoor unit
Total length for all rooms
Lower installation spot of the indoor unit A
Height
Upper installation spot of the indoor unit B
difference
Maximum height difference of the indoor units C
Length of chargeless refrigerant pipe*
* 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:
Class of indoor unit (kW)
Diameter of joint pipe
¡Outdoor unit and the total connectable indoor units (class kW):
Model
SCM80ZA
94
SCM80ZA 30A
2
)
A
C
B
2.2 · 2.5 · 2.8kW
Liquid side
Gas side ø 9.52 · t 0.8
Total of indoor units (class kW)
12.0kW
SCM80ZA
under 25m
under 60m
under 15m
under 10m
under 25m
40m
3.2 · 4.0 · 5.0kW
ø 6.35 · t 0.8
ø 12.7 · t 0.8
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