Electrical Connection - Toshiba RAS-M07G3DV Series Installation Manual

• Use the tightening torque levels as listed in the table
below.
Outer dia. of
Tightening torque (N•m)
connecting pipe (mm)
6.4 14 to 18 (1.4 to 1.8 kgf•m)
9.5 34 to 42 (3.4 to 4.2 kgf•m)
12.7 49 to 61 (4.9 to 6.1 kgf•m)
• Tightening torque of flare pipe connections.
Pressure of R410A is higher than that of R22. (Approx.
1.6 times) Therefore, using a torque wrench, tighten
the flare pipe connecting sections which connect the
indoor and outdoor units of the specified tightening
torque.
Incorrect connections may cause not only a gas leak,
but also a trouble of the refrigeration cycle.
CAUTION
Tightening with an excessive
torque may crack the nut
depending on installation
conditions.
Airtight test / Air purge, etc.
For air tightness test, vacuum drying and adding
refrigerant, refer to the Installation Manual attached tothe
outdoor unit.
Open the valve fully
Open the valve of the outdoor unit fully.
Heat insulation process
Apply heat insulation for the pipes separately at liquid
side and gas side.
• For the heat insulation to the pipes at gas side, use the
material with heat-resisting temperature 120 °C or
higher.
• To use the attached heat insulation pipe, apply the
heat insulation to the pipe connecting section of the
indoor unit securely without gap.
EN-29
REQUIREMENT
• Apply the heat insulation to the pipe connecting
section of the indoor unit securely up to the root
without exposure of the pipe. (The pipe exposed to the
outside causes water leak.)
• Wrap heat insulator with its slits facing up (ceiling
side).
Wrap the pipe with the attached heat insulator
without any gap between the indoor unit.
The seam must be faced
Indoor unit
upward (ceiling side).
Flare nut
Heat insulator
Heat insulation
of the pipe
Union Banding band
pipe
(Locally
(Accessory)
procured)
– 15 –
8

Electrical connection

1. The supply voltage must be the same as the rated voltage of the air conditioner.
2. Prepare the power source for exclusive use with the air conditioner.
NOTE
• Wire type : More than H07RN-F or 60245 IEC66 (1.5 mm
REQUIREMENT
• Connect the wires matching the terminal numbers. Incorrect connection may cause a trouble.
• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing or other purpose.
1. Before performing wiring work in the electrical control box, remove the cover of the box (fixed with 1 screw).
2. Tighten the screws of the terminal block firmly, and fix the wires with the cord clamps attached to the electrical
control box. (Do not apply tension to the connecting section of the terminal block.)
Mount the cover of the electrical control box without pinching wires.
Optional remote
controller wiring
Signal receiving
unit wiring
1 2 3
10
60
Earth wire
Connecting cable
2
or more).
Earth screw
Side C (Space: 4 mm)
Select side C or D for the power cable clamping position referring to
the following table according to the cable type and diameter.
*Cable clamp can be attached on either right or left side.
When twin system are connected, clamp two cables with one cable
clamp.
Wire type Specification
Cabtyre cable
3-core stranded wire 2.5 mm²
Connecting cable
Cabtyre cable 4-core stranded wire 1.5 mm²
Power supply wire
10
50
Installation Manual
Side D (Space: 8.5 mm)
Cable clamping position
Side D
Side C
See the figure on the left for
system interconnection wires
to the terminal block.
EN-30