Electrical Connection - Toshiba MML-UP0071H-E Installation Manual

Tightening connection
CAUTION CAUTION
Do not apply excessive torque. Otherwise, the nut may
crack depending on the conditions.
Outside diameter size
Tightening torque
(mm)
6.4 mm 14 - 18
9.5 mm 34 - 42
12.7 mm 49 - 61
15.9 mm 68 - 82
▼Tightening torque of flare pipe connections
Incorrect connections may cause not only a gas leak,
but also a trouble of the refrigeration cycle.
Align the centres of the connecting pipes and tighten
the flare nut as far as possible with your fingers. Then
tighten the nut with wrenches and torque wrench as
shown in the figure.
Work using two wrenches
REQUIREMENT
Tightening with an excessive torque may crack the nut
depending on installation conditions.
Tighten the nut within the specified tightening torque.
25-EN
 Airtight test / Air purge, etc.
For air tightness test, vacuum drying and adding
refrigerant, refer to the Installation Manual attached
to the outdoor unit.
CAUTION CAUTION
Unit: N•m
Do not supply power to the indoor unit until the airtight
test and vacuuming are completed. (If the indoor unit is
powered on, the pulse motor valve is fully closed, which
extends the time for vacuuming.)
 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.
REQUIREMENT
Insulate the refrigerant pipe in the indoor unit securely up
to the point shown in the following figure.
Adhesive tape
Heat insulator
(Accessory)
Heat insulator
Liquid pipe Gas pipe
– 13 –
7

Electrical connection

WARNING
• Use the specified wires for wiring connection to 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.
CAUTION CAUTION
• The wire size and wire length of the communication line differs depending on the outdoor unit series to be
connected.
• If incorrect / incomplete wiring is carried out, it will cause an electrical fire or smoke.
• Install an earth leakage breaker that is not tripped by shock waves.
If an earth leakage breaker is not installed, an electric shock may be caused.
• Use the cord clamps attached to the product.
• Do not damage or scratch the conductive core and inner insulator of power and control wires when peeling them.
• Use the power supply wire and control wires of specified thickness, type, and protective devices required.
• Do not connect 220 V to 240 V power to the terminal blocks (Uv (U1)), (Uv (U2)), (A), (B) for control wiring.
(Otherwise, the system will fail.)
• 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.
REQUIREMENT
• For power supply wiring, strictly conform to the Local Regulation in each country.
• For wiring of power supply of the outdoor units, follow the Installation Manual of each outdoor unit.
• After connecting wires to the terminal blocks, provide a trap and fix wires with the cord clamp.
• Run the refrigerant piping line and communication line in the same line.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
26-EN