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
