Centek CT-65K07 WIFI Инструкция по эксплуатации онлайн [32/40] 744192

Centek CT-65K07 WIFI Инструкция по эксплуатации онлайн [32/40] 744192
31
I
Table 2
Tube size
(mm)
Torque
(N, m)
φ 6.35 (1/4”) 15~25
φ 9.52 (3/8”) 35~40
φ 12.70 (1/2”) 45~60
Remove the maintenance panel protective covers of the indoor and
outdoor units. Loosen the terminal strip screws and properly connect
the cores of the inter-unit electrical cable and power cable to the
terminals (for some models the indoor units can be shipped with the
power cable and plug already connected).
Connect the earthing wire with screws to the threaded holes
located separately on the maintenance panels. Observe the proper
connection of the wires. Securely tighten the terminal strip screws
to prevent their loosening. Ensure that the connected wires do not
move by pulling on them. Fasten the inter-unit electrical cable in the
provided clamps. Reinstall the protective covers on the indoor and
outdoor unit maintenance panels.
Tube Insulation and Wrapping with Tape
The refrigerant tubes should be provided with heat insulation. The
refrigerant tube connection fittings, including the outdoor unit valves
should also be heat-insulated. The drain tube, if routed indoors,
should be provided with heat insulation. Use the supplied tape to
tightly wrap the refrigerant tubes, drain tube (hose) and inter-unit
electrical cable. The drain tube (hose) should be located at the very
bottom of the bundle.
Checkup and Vacuum Testing Procedures
Ensure that the refrigerant tubes and electrical cables are properly
connected. Remove the protective caps from the gas and liquid valves
in the outdoor unit refrigerant tubes.
Ensure that the gas and liquid valves in the outdoor unit refrigerant
tubes are closed. Connect the pressure gage manifold and nitrogen
bottle to the maintenance port of the outdoor unit gas refrigerant
tube. The bottle should be connected via a pressure reducer. The use
of compressed air is not allowed because of the presence of moisture.
Pressurize the system with nitrogen to 4.15 MPa. Keep the nitrogen
bottle with the valve facing up to prevent liquid nitrogen from getting
into the system.
Check all pipeline connections for leaks, e.g. by applying soap suds.
Repair any revealed leaks.
Wait for 10-15 minutes and check the pressure in the system. If the
pressure drops, inspect the system to find the reason. Disconnect the
nitrogen bottle from the pressure gage manifold. Pump the nitrogen
out of the system.
REFRIGERANT PIPES, LENGTH AND HEIGHT LIMITATIONS
Min. Tube
length
(m)
Maximum allowable tube
length without additional
refrigerant charge
(m)
Maximum allowable
tube length
Maximum allowable
mounting height
difference between the
indoor and outdoor units
Quantity of additional refrigerant
(g/m)
< 12000 BTU/h > 18000 BTU/h
2 5
models:
7/12 - 20 m,
18/24 - 25 m
models:
7/12 - 8 m,
18/24 - 10 m
20 30

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