14-EN
25
25
Installation Manual
–14–
Toshiba 1112750201 (EN)
REQUIREMENT
Tightening with an excessive torque may crack the nut
depending on installation conditions.
Tighten the nut within the specifi ed tightening torque.
Piping with outdoor unit
• Shape of valve differs according to the outdoor unit.
For details of installation, refer to the Installation
Manual of the outdoor unit.
REQUIREMENT
Use a leak detector manufactured exclusively HFC
refrigerant (R410A, R134a, etc.).
Open fully valves of the outdoor
unit
Heat insulation
Heat insulation for the pipes should be done separately
for the liquid side and gas side. Because both of the
liquid and gas side pipes become a low temperature
during cooling operation, suffi cient heat insulation should
be done to prevent condensation.
• Heat insulator with a heat resistance of 120°C or more
must be used for the gas side pipe.
• The pipe connection section of the indoor unit must
be heat insulated securely and compactly with the
attached heat insulator.
Airtight test/Air purge, etc.
For airtight test, air purge, addition of refrigerant,
and gas leak check, follow the Installation Manual
attached to the outdoor unit.
WARNING
1. Using the specifi ed wires, ensure to connect the
wires, and fi x wires securely so that the external
tension to the wires do not affect the connecting
part of the terminals.
Incomplete connection or fi xation may cause a fi re,
etc.
2. Be sure to connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground wires for telephone
wires.
3. 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 fi re.
CAUTION
• If incorrect/incomplete wiring is carried out, it will
cause an electrical fi re or smoke.
• Be sure to 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.
• Be sure to use the cord clamps attached to the
product.
• Do not damage or scratch the conductive core and
inner insulator of power and interconnecting wires
when peeling them.
• Use the power cord and Inter-connecting wire of
specifi ed thickness, type, and protective devices
required.
• Never connect 220–240V power to the terminal
blocks (
,
,
,
, etc.) for control wiring.
(Otherwise, the system will fail.)
8
8
ELECTRIC WORK
ELECTRIC
WORK
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.
• 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.
• After connecting wires to the terminal blocks, provide
a trap and fi x wires with the cord clamp.
• Run the refrigerant piping line and control wiring line
in the same line.
• Do not turn on the power of the indoor unit until
vacuuming of the refrigerant pipes completes.
Indoor unit
Wrap the pipe with the attached
heat insulator without any gap
between the indoor unit.
Heat insulator (attached)
Banding band (attached)
Banding band (attached)
Fix with vinyl tape
Heat insulator of the local side pipe
Summary of Contents for MML-AP0074NH-E
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