Trane 4TXM2318BF300AA Service Manual page 63

Cutting and Enlarging
Cutting or enlarging pipes should be proceeded by installation personnel according to the operating criterion if the
tube is too long or flare opening is broken.
Vacuumizing
Vacuumize from the stop valve of outdoor units with vacuum pump. Refrigerant sealed in indoor machine is not
allowed to use for vacuumization.
Open All Valves
Open all the valves of outdoor units.
[NB: oil balancing stop valve must be shut up completely when connected one main unit.]
Checkup for Air Leakage
Check if there is any leakage at the connecting part and bonnet with hydrophone or soapsuds.
4.4.6 Electrical Wiring
• Electrical construction should be made with specific mains circuit by the qualified personnel according to the
installation instruction. Electric shock and fire may be caused if the capacity of power supply is not sufficient.
• During arranging the wiring layout, specified cables should be used as the mains line, which accords with the local
regulations on wiring. Connecting and fastening should be performed reliably to avoid the external force of cables
from transmitting to the terminals. Improper connection or fastness may lead to burning or fire accidents.
• There must be the ground connection according to the criterion. Unreliable grounding may cause electrical
shocks. Do not connect the grounding line to the gas pipe, water pipe, lightening rod and telephone line.
• Only copper wire can be used. Breaker for electric leakage should be provided, or electric shock may occur.
• The wiring of the mains line is of Y type. The power plug L should be connected to the live wire and plug N
connected to null wire while should be connected to the ground wire. For the type with auxiliary electrically heating
function, the live wire and the null wire should not be misconnected, or the surface of electrical heating body will
be electrified. If the power line is damaged, replace it by the professional personnel of the manufacturer or service
center.
• The power line of indoor units should be arranged according to the installation instruction of indoor units.
• The electrical wiring should be out of contact with the high-temperature sections of tubing as to avoid melting the
insulating layer of cables, which may cause accidents.
• After connected to the terminal tier, the tubing should be curved into be a U-type elbow and fastened with the
pressing clip.
• Controller wiring and refrigerant tubing can be arranged and fixed together.
• The machine can't be powered on before electrical operation. Maintenance should be done while the power is
shut down.
WARNING
ATTENTION
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