Electrical Connection - Toshiba RAV-HM301SDTY-E Installation Manual

IM_D0X7205001-01_EN.book Page 133 Friday, May 19, 2023 9:06 PM
• Use the tightening torque levels as listed in the table
below.
Outer dia. of connecting
Tightening torque (N•m)
pipe
6.4 14 to 18
9.5 34 to 42
12.7 49 to 61
15.9 68 to 82
• Tightening torque of flare pipe connections.
Pressure of R32 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 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.
49-EN
– 133 –
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)
8

Electrical connection

WARNING
• Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces
applied to the terminals from affecting the terminals.
Incomplete connection or fixation may cause a fire or other trouble.
• Connect earth wire. (grounding work)
Incomplete earthing cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
• Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
• Under no circumstances, the power supply wire or the indoor and outdoor connecting wire must not be
connected in the middle (Connection using a solderless terminal etc.)
Connection trouble in the places where the wire is connected in the middle may give rise to smoking and/or a fire.
CAUTION CAUTION
• For power supply specifications, follow the Installation Manual of outdoor unit.
• Do not connect 208 - 240 V power to the terminal blocks (A, B) for control wiring.
Otherwise, the system will fail.
• Do not damage or scratch the conductive core and inner insulator of power and system interconnection wires
during peeling them.
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
 Wiring specifications
Indoor / Outdoor connecting wires specifications
Indoor unit power supplied from outdoor unit
• The outdoor unit power supply patterns vary on models.
220-240V, 50Hz
Indoor unit power supply
220V, 60Hz
Indoor / Outdoor connecting wires* 4 × 1.5 mm
wire × wire
* Number of size
* Including earth line
2
or more (H07 RN-F or 60245 IEC 66)* Up to 70 m
50-EN