Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1060

FDC-HKXR
(7) Refrigerant charge amount
(a) Additional; charge amount
Item
Model
FDCP2001HKXRE2
FDCP2501HKXRE2
Notes (1) When the refrigerant piping length exceeds the length that additional refrigerant charge is not required, charge
additional refrigerant based on to calculated amount of refrigerant per unit piping length.
(2) The unit is holding charge type that all of the refrigerant is charged in the outdoor unit and in the indoor unit only
a small amount of refrigerant is filled for prevention of the air entry.
Calculation of amount of refrigerant to be charged in local piping
The amount refrigerant additionally charged in local piping depends on connection pipe size but not on indoor unit type.
[Amount of refrigerant to be charged in the local piping = Actual length of liquid pipe × Amount of
refrigerant additionally charged per meter of liquid pipe]
[Example] Amount of refrigerant additionally changed = (I
: Overall length (m) of φ12.7 liquid pipe
I
1
: Overall length (m) of φ9.52 liquid pipe
I
2
: Overall length (m) of φ6.35 liquid pipe
I
3
Following precautions must be observed when the model is adapted to R407C.
(1) Tools and related components should be changed when handling a different kind of refrigerant in order to prevent mixing of different oils.
Gauge manifold and charge hose, particularly, should never be used after using them for R22.
(2) Charge cylinder should not be used. Otherwise, the refrigerant composition may change when charging R407C into the cylinder.
(3) Refrigerant should be charged in the liquid phase from the container. Charging the refrigerant in the gaseous phase could change the
refrigerant composition substantially.
(4) Volume of refrigerant to be taken out in the liquid phase from the container should be up to 90% of necessary quantity (in weight percent)
as a standard.
(5) Refrigerant should not be replenished even if a leakage is discovered because it could change the refrigerant composition substantially.
When a leakage is discovered, replace with new refrigerant in the specified volume. However, it could be replenished temporarily in case of
an emergency.
20.5.5 Electrical wiring
(1) Power supply wiring
(a) Outdoor unit power supply (A separate power supply is used for the indoor unit)
Item
Power
supply
Model
FDCP2001HKXRE2 3-phase
380/415V
FDCP2501HKXRE2
50Hz
(b) Indoor unit power supply
Item Power
Supported supply
outdoor model
FDCP2001HKXRE2 1-phase
220/240V
FDCP2501HKXRE2
50Hz
1058
Additional charge amount
per 1 m of liquid pipe
φ12.7 φ9.52 φ6.35
0.12 kg/m 0.06 kg/m 0.03 kg/m
Power supply Wire
Wire circuit breaker (A)
wiring thickness length
Rated current
(mm ) (m)
2
40/40
5.5/5.5 46/54
8.0/8.0 47/58 60/60
Thickness of
Power supply Wire
power supply
wire between
wiring thickness length
indoorunits
(mm 2 ) (m)
(mm 2 )
2.0/2.0 37/37 2.0/2.0
Factory charge amount at time of shipment
Outdoor unit Indoor unit
11.0 kg Holding charged
× 0.12) + (I × 0.06) + (I
1 2
Short-circuit breaker
(Use for both pround/
overload and short-
Switch capacity
circuit production)
30/30
40A100mA 0.1sec or less
50/50 50A100mA 0.1sec or less
Circuit
Wire circuit Short-circuit breaker
Breaker
breaker (Use for both pround/
Switch
luse rated current overload and short-
capacity
(A) circuit production)
(A)
20/20 20/20 20A30mA 0.1sec or less
Remarks
Additional refrigerant
Charge is not required
× 0.03)
3
Ground wire
Thickness
Screw type
(mm)
5.5/5.5 M6
2
Signal wire thikness (mm )
Between outdoor Between
and indoor units indoor units
2 core ×
Same as
0.75 ~ 2.0 at left