Carrier 69NT40-541-306, Операция и обслуживание

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5–1 T-354
SECTION 5
OPERATION
5.1 INSPECTION (BEFORE STARTING)
WARNING
!
Beware of unannounced starting of the evaporator and condenser fans. The unit may cycle the
fans and compressor unexpectedly as control requirements dictate.
a. If container is empty, check inside for the following:
1. Check channels or “T” bar floor for cleanliness. Channels must be free of debris for proper air circulation.
2. Check container panels, insulation, and door seals for damage. Make permanent or temporary repairs.
3. Visually check evaporator fan motor mounting bolts for proper securement (refer to paragraph 6.16).
4. Check for dirt or grease on evaporator fan or fan deck and clean if necessary.
5. Check evaporator coil for cleanliness or obstructions. Wash with fresh water.
6. Check defrost drain pans and lines for obstructions and clear if necessary. Wash with fresh water.
7. Check panels on refrigeration unit for loose bolts and condition of panels. Make sure T.I.R. devices are in
place on access panels.
b. Check condenser coil for cleanliness. Wash with fresh water.
c. Open control box door. Check for loose electrical connections or hardware.
d. Check color of moisture-liquid indicator.
e. Check oil level in compressor sight glass.
5.2 CONNECT POWER
WARNING
!
Do not attempt to remove power plug(s) before turning OFF start-stop switch (ST), unit circuit
breaker(s) and external power source.
WARNING
!
Make sure the power plugs are clean and dry before connecting to any power receptacle.
5.2.1 Connection To 380/460 VAC Power
1. Make sure start-stop switch (ST, on control panel) and circuit breaker (CB-1, in the control box) are in posi-
tion “O” (OFF).
2. Plug the 460VAC (yellow) cable into a de-energized 380/460VAC, 3-phase power source. Energize the
power source. Place circuit breaker (CB-1) in position I” (ON). Close and secure control box door.
5.2.2 Connection to190/230 VAC Power
An autotransformer ( Figure 5.1 ) is required to allow operation on nominal 230 volt power. It is fitted with a 230VAC
cable and a receptacle to accept the standard 460VAC power plug. The 230 volt cable is black in color while the
460 volt cable is yellow. The transformer may also be equipped with a circuit breaker (CB-2). The transformer is a
step-up transformer that will provide 380/460VAC, 3-phase, 50/60 hertz power to the unit when the 230VAC power
cable is connected to a 190/230VAC, 3-phase power source.