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CT-65I24
Инструкция по эксплуатации Страница: 35

Centek CT-65I24 Инструкция по эксплуатации онлайн [35/44] 744191

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.

Connect a vacuum pump to the pressure gage manifold. Turn on the

vacuum pump. Evacuate the system to an underpressure of –0.101

MPa. Wait for 5-10 minutes and check the underpressure in the

system. If the underpressure decreases inspect the system to find

that cause. Disconnect the vacuum pump from the pressure gage

manifold. Make sure that the pressure gage manifold and vacuum

pump are used properly, carefully read the operating manuals of each

device and instrument before use.

Fully open the refrigerant valves of the outdoor unit, first the liquid

valve, then the gas valve.

Disconnect the pressure gage manifold from the outdoor unit gas

refrigerant tube maintenance port. Install the protective caps on the

gas and liquid refrigerant valves of the outdoor unit.

Refrigerant Charging

These models are supplied with outdoor units charged with R32

grade refrigerants. The systems do not require additional refrigerant

charging if the tube length do not exceed the limitations specified

above.

Centek CT-65I24 Инструкция по эксплуатации онлайн [35/44] 744191

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