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English-12
English-11
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.
REQUIREMENT
Be sure to use the tool such as charge hose exclusive to R410A.
Do not turn on the power until the airtight test and the vacuuming have finished.
(If turning on the power, the incorporated PMV is closed fully and the period until the vacuuming finishes elongates.)
Open fully valves of the outdoor unit
Gas leak check
Check with a leak detector or soap water whether gas leaks or not, from the pipe connecting section.
REQUIREMENT
Use a leak detector manufactured exclusively for HFC refrigerant (R410A, R134a, etc.).
Heat insulating process
Perform heat insulating for pipes at liquid side and gas
side separately.
In cooling time, temperature at both liquid and gas sides
becomes lower.
Therefore, perform heat insulating process sufficiently to
avoid dewing.
• For heat insulator of pipe at gas side, be sure to use
one with heat-resisting temp. 120°C or more.
• Using the attached heat insulating pipe, perform heat
insulating process securely for pipe connecting part of
the Flow Selector units without clearance.
REQUIREMENT
Apply the heat insulation to the pipe connecting section of the Flow Selector unit securely up to the root without
exposure of the pipe. (The pipe exposed to the outside causes water leak.)
Flow Selector unit
Heat insulating
pipe (Attached)
Binding band
(Local supply)
Heat insulator
The upper slit
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ELECTRIC WORK
WARNING
1. Using the specified wires, ensure to connect the wires, and fix wires securely so that the external
strength of the wires do not transmit to the connecting part of the terminals.
Incomplete connection or fixation may cause fire, etc.
2. Be sure to connect earth wire. (Grounding work)
Do not connect the earth wire to gas pipe, city water pipe, lightning rod, or the earth wire of telephone.
Incomplete grounding causes an electric shock.
3. For electric work, strictly follow to the Local Regulation in each country and the Installation
Manual, and use an exclusive circuit.
Capacity shortage of power circuit or incomplete installation may an electric shock or ftre.
REQUIREMENT
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulted in an accident.
• After connecting wires to the terminal blocks, provide a trap and fix wires with the wire clamp.
• Store 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.
Wire connections
Use the supplied, dedicated wires.
REQUIREMENT
• Check that power is not supplied to the indoor unit before connecting wires.
• For safety, connect wires to the Flow Selector unit first.
• Be sure to put wires through the wire connecting ports on the Flow Selector unit and the indoor unit.
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REFRIGERANT PIPING