System Requirements; Piping (Field Supplied); Power Wiring; Refrigerant Charge - Toshiba RAS-09 12EK Series Installation Manual

Piping (Field supplied)

• Minimum refrigerant line length between the outdoor unit and indoor unit is
6.6ft. (2m).
• Maximum pipe lengths
Allowable
Pipe length T
(ft (m))
66 (20)
Refrigerant pipe sizes
Liquid side
Outer Diameter Thickness
In. (mm) In. (mm)
Ø1/4 (6.35) 0.03 (0.8)
Insulation
Both lines need to be insulated. Use a minimum 5/16 in (8mm) wall
thickness.
1110251291-2 EN.indd 3 1110251291-2 EN.indd 3

SYSTEM REQUIREMENTS

SYSTEM REQUIREMENTS
Height difference
(Indoor – Outdoor H)
(ft (m))
33 (10)
T H
Gas side
Outer diameter Thickness
In. (mm) In. (mm)
Ø3/8 (9.52) 0.03 (0.8)
3

Refrigerant charge

Refrigerant charge
Length of refrigerant Pipe
connected to Indoor/
outdoor unit
6.6-50
(2-15m)
50-66
Refrigerant for piping that exceeds
(15-20m)
* Caution during addition of refrigerant
Max. amount of additional refrigerant is 0.22 lbs (100g).
Charge the system accurately. Overcharging may damage the
compressor.
* Minimum refrigerant pipe is 6.6ft (2m).
Using pipe shorter than that may cause a malfunction of the compressor
or other components.

Power Wiring

The main power is supplied to the outdoor unit. The fi eld supplied
connecting cable from the outdoor unit to indoor unit consists of three (3)
wires and provides the power for the indoor unit. Two wires are high voltage
AC power and one is a ground wire.
Consult your local building codes and the NEC (National Electrical Code) or
CEC (Canadian Electrical Code) for special requirements.
All wires must be sized per NEC or CEC and local codes. Use Electrical
Data table MCA (minimum circuit amps) and MOCP (maximum over current
protection) to correctly size the wires and the disconnect fuse or breakers
respectively.
Only copper conductors with a minimum 300 volt rating and 2/64--inch thick
insulation must be used.
Interconnecting cable between FCU and CDU must be a minimum AWG14.
Unit : ft (m)
Additional refrigerant
None
Add 0.22oz/ft (20g/m) of
50ft (15m) up to 66ft (20m)
12/13/13 5:00 PM 12/13/13 5:00 PM
EN
SI