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
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
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)
Ø1/2 (12.70)
0.03 (0.8)
Product
Model
Item
FCU RAS-15EK Series RAS-17EK Series RAS-22EK Series
CDU RAS-15EA Series RAS-17EA Series RAS-22EA Series
MCA
13
13
15
MOCP (MAX Fuse/CB)
20
20
25
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.
1110651824-1 EN.indd 3
1110651824-1 EN.indd 3
11/13/13 2:02 PM
11/13/13 2:02 PM
