EN
SI
3
Piping (Field supplied)
• Minimum refrigerant line length between the outdoor unit and indoor unit is
6.6ft. (2m).
• Maximum pipe lengths
SYSTEM REQUIREMENTS
SYSTEM REQUIREMENTS
Allowable
Pipe length T
(ft (m))
Height difference
(Indoor – Outdoor H)
(ft (m))
66 (20)
33 (10)
Refrigerant pipe sizes
H
T
Liquid side
Gas side
Outer Diameter
In. (mm)
Thickness
In. (mm)
Outer diameter
In. (mm)
Thickness
In. (mm)
Ø1/4 (6.35)
0.03 (0.8)
Ø3/8 (9.52)
0.03 (0.8)
Insulation
Both lines need to be insulated. Use a minimum 5/16 in (8mm) wall
thickness.
Refrigerant charge
Unit : ft (m)
Refrigerant charge
Length of refrigerant Pipe
connected to Indoor/
outdoor unit
Additional refrigerant
6.6-50
(2-15m)
None
50-66
(15-20m)
Add 0.22oz/ft (20g/m) of
Refrigerant for piping that exceeds
50ft (15m) up to 66ft (20m)
* Caution during addition of refrigerant
Max. amount of additional refrigerant is 0.22 lbs (100g).
Charge the system accurately. Overcharging may cause serious trouble
to the compressor.
* Minimum refrigerant pipe is 6.6ft (2m).
Using pipe shorter than that may cause a malfunction of the compressor
or other components.
• The power supply shall be connected to the outdoor unit by 3 wires.
• The connecting cable between the indoor unit and outdoor unit needs to
have 4 wires. This cable provides the power for the indoor unit and the
communication signal between the outdoor unit and indoor unit.
• Consult local building codes, NEC (National Electrical Code) or CEC
(Canadian Electrical Code) for special requirements.
• The following are the electrical requirements.
Power supply Connection and
Connecting Cable
Product
Model
Item
FCU RAS-09EK Series RAS-12EK Series
CDU RAS-09EA Series RAS-12EA Series
MCA
10
13
MOCP (MAX Fuse/CB)
15
20
Breaker
15A
Power supply cord
(Not provide)
Connect to
FCU/CDU
CDU
No. of Core
3 (L1, L2,
i
)
Size
AWG14
Interconnecting
cable between FCU
& CDU (Not provide)
No. of Core
4 (L1, L2, S,
i
)
Size
AWG14
MCA = Minimum Circuit Amps
MOCP = Maximum Over Protection Device Amps.
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11/13/13 2:52 PM
11/13/13 2:52 PM
