Toshiba CARRIER RAV-SP300AT2-UL, Installation Manual

Toshiba

– 4 –

Outdoor Unit

Installation Manual

EN

3

SYSTEM REQUIREMENTS

„

Piping (Field supplied)

• Minimum refrigerant line length between the outdoor 

unit and indoor unit is 16.5” (5 m)

• Maximum pipe lengths

Figure of Single

Refrigerant sizes

Flare nuts and flaring

• The flare nuts and flaring are different from those for 

the conventional refrigerant.
Use the flare nuts supplied with the air conditioner or 
those for R410A.

• Before performing flaring, carefully read 

“REFRIGERANT PIPING”

Insulation

Both lines need to be insulated. Use a minimum 0.4” 
(10 mm) wall thickness.

Refrigerant charge

* Caution during addition of refrigerant

Max. amount of additional refrigerant is 1.8 lbs (800 

g).

Charge the refrigerant accurately. Overcharging 

may cause serious trouble with the compressor.

* Minimum refrigerant pipe is 16’5”(5 m).

This may cause a malfunction of the compressor or 

other devices.

Metering Device is an electronic EXV (PMV) in 

outdoor unit.

„

Connecting power and control 
cables (Field supplied)

• The main power is supplied to the outdoor unit. The 

field supplied connecting cables from the outdoor 
unit to the indoor unit consist for 4 wires and provides 
the power for the indoor unit as well as the 
communication signal between the outdoor and 
indoor unit.

• System interconnection wire size must be AWG12.
• Breaker must have a capacity specified in the 

following table.

• All wiring must comply with local electric codes and 

NEC (National Electric Code) or CEC (Canadian 
Electric Code).

Allowable 

pipe length

(ft (m))

Height difference

(Indoor-outdoor H)

(ft (m))

Number of 

bent portions

Total length    

L

Indoor unit: 

Upper

Outdoor unit: 

Lower

10 or less

246’1” (75)

98’5” (30)

98’5” (30)

Liquid side

Gas side

Outer 

diameter

Thickness

Outer 

diameter

Thickness

Ø3/8”

(9.5 mm)

0.03”

(0.8 mm)

Ø5/8”

(15.9 mm)

0.04”

(1.0 mm)

H

L

Indoor Unit

Outdoor Unit

Length of refrigerant 

pipe connected to 

indoor/outdoor unit

Additional refrigerant

9’10” - 98’5”

(3 - 30 m)

None

*98’5” - 246’1”

(30 - 75 m)

Add 0.43 oz/ft (40 g/m) of 

refrigerant for piping that exceeds 

98’5” (30 m) up to 246’1” (75 m).

Model RAV-

SP420

Power supply

208/230 V, 60 Hz

MCA

24 A

MOCP (MAX Fuse/CB)

40 A 

Breaker

25 A

System interconnection wires

AWG12

MCA = Minimum Circuit Amps

MOCP =Maximum Over Protection Device Amps.

4-EN

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