Mitsubishi Heavy Industries SRRM40HENG-L, Handbook, Page: 722 / 1106

720
V MULTI
(4) Electrical wiring
™
This air conditioning system should be notificated to supply authority before connection to power supply system.
(a) Selection of size of power supply and interconnecting wires.
IMPORTANT
¡
Electric wiring work should be conducted only by authorized personnel.
¡
Use copper conductor only.
¡
Power source wires and Interconnecting wires shall not be lighter than
polychloroprene sheathed flexible cord (design HO5RN-F IEC 57).
¡
Do not connect more than three wires to the terminal block.
¡
Use round type crimped terminal lugs with insulated grip on the end of the wires.
¡
Select wire sizes and circuit protection from Table 2.
Table 2 ( This table shows 20m length wires with less than 2% voltage drop. )
FDC508HES3 30 20 1.6mm
FDC808HES3 3
50 50
5.5mm
2
2.0mm
FDC1008HES3
Power source
wires
(minimum)
Interconnecting
and grounding
wires (minimum)
Over-current protector
rated capacity (A)
Switch breaker
(A)
Item
Model
Phase
Circuit breaker
1) For twin type
Outdoor Unit: FDC508HES3
Indoor Unit: FDT258-A + FDR258-A
Double twin specification (FDC808, 1008HES3 only)
G = main piping L (m)
×
C + branch piping L
1
(m)
×
f + branch piping L
2
(m)
×
f + branch piping
1
(m)
×
f
+ branch piping
2
(m)
×
f + branch piping
3
(m)
×
f + branch piping
4
(m)
×
f - (D - B)
Example of Calculation
8.0mm
2
FDC508
Outdoor unit Indoor unit
FDT258-A
FDR258-A
φ
9.52
φ
9.52
Liquid line
φ
9.52
Main piping L=30m
1
=5m
2
=5m
G=30m(L)
×
0.035kg/m + 5m(
1
)
×
0.025kg/m + 5m(
2
)
×
0.025kg/m - (1.90 - 1.73)
=1.13kg
Amount of additional charge: 1.13 kg
Twin Type
FDC1008
Outdoor unit Indoor unit
FDT258-A
FDT258-A
FDR258-A
φ
9.52
φ
9.52
Liquid line
φ
15.88
Main piping L=20m L
1
=5m
4
=5m
FDR258-A
φ
9.52
3
=5m
φ
9.52
1
=5m
φ
9.52
φ
9.52
1
=5m
L
2
=5m
G=20m(L)
×
0.07kg/m + 10m(L
1
+L
2
)
×
0.025kg/m + 20(
1
+
2
+
3
+
4
)
×
0.025kg/m
- (7.6 - 7.25)=1.8kg Amount of additional charge: 1.8 kg
Double twin Type
2) For double twin type
Outdoor Unit: FDC1008HES3
Indoor Unit: FDT258-A + FDT258-A + FDR258-A + FDR258-A
For recharging If vacuum extracted and recharging.
Twin & triple specifications
G = B + main piping L (m)
×
C + branch piping
1
×
f + branch piping
2
(m)
×
f + branch piping
3
(m)
×
f
(only fortriple specifications)
Double twin specification (FDC808, 1008HES3 only)
G = main piping L (m)
×
C + branch piping L
1
(m)
×
f + branch piping L
2
(m)
×
f + branch piping
1
(m)
×
f
+ branch piping
2
(m)
×
f + branch piping
3
(m)
×
f + branch piping
4
(m)
×
f