10
4.8 Thermal insulation of pipe
1) Apply thermal insulation to the pipes at the gas side and the liquid side respectively;
2) Use closed-cell thermal insulation materials, with the flame retardant grade of B1 and high temperature resistance of 120℃ ;
3) Outer diameter of copper pipe ≤φ12.7 and thickness of thermal insulation cotton ≥ 15mm; outer diameter of copper pipe ≥ φ15.88 and
thickness of thermal insulation cotton ≥ 20mm.
4) The nut joints of the indoor unit shall be performed thermal insulation
5.1 Outdoor unit wiring
!
NOTE
· The power supplies for the indoor and outdoor units shall be separately designed.
· The power supply must be designed with a sub-circuit, and equipped with a current leakage protector and a manual switch.
· All indoor units in the same system shall be arranged on the same power circuit, and shall be turned on/off the power simultaneously. It is not
allowed to equip each indoor unit with a power switch.
· The connecting wire system and the refrigerant pipe system of the indoor unit shall be incorporated into the same system.
· To reduce the interference, the indoor and outdoor communication cables shall use two-core or three-core shielded twisted-pair cables instead of
ordinary multi-core cables.
· Conform to related national electrical standards.
· Electrical wiring shall be done by a professional electrician.
Single-phase
Three-phase
Power Supply
220- ～240V 50Hz
Power Line (mm2)
3×4.0
40/30
Power （kW)
10.5
Breaker/Fuse (A)
Signal Wire of Indoor/Outdoor Units (mm) (Signal Wire of
Weak Current)
380V 50Hz～ 5×2.5
25/20
three-core shielded cable 3×1.0 (two-core shielded cable 2×1.0)
Single-phase
Three-phase
220- ～240V 50Hz 3×6.0
63/45
14/16
380V 50Hz～ 5×2.5
25/20
Table 5-1 Outdoor Unit Wiring
5 Electrical Wiring
Fig. 5-1 Electrical Wiring of Single-phase Outdoor Units Fig. 5-2 Electrical Wiring of Three-phase Outdoor Units
X Y E
P Q E
Indoor unit
Outdoor unit
Y/G
L N
Three-core
shielded cable
Single-phase power supply
220V-50Hz
Single-phase power supply
220V-50Hz
L N
Y/G
P Q E
Single-phase power supply
220V-50Hz
Three-phase power supply 380V3N-50Hz
Three-core
shielded cable
L1
L2 L3
Indoor unit
Outdoor unit
Y/G
P Q E
L N
Y/G
N
P Q E
X Y E
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