Carrier 69NT40-541-505, Руководство по эксплуатации и обслуживанию, Страница: 81 / 143

5–1 T-368
SECTION 5
OPERATION
5.1 INSPECTION (BEFORE LOADING)
WARNING
!
Beware of unannounced starting of the
evaporator and condenser fans. The unit
may cycle the fans and compressor unex-
pectedly 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 tempo-
rary repairs.
3. Visually check evaporator fan motor mounting
bolts for proper securement (refer to Section
7.15 ).
4. Check for visible corrosion on the evaporator
stator and fan deck (refer to Section 7.15 ).
5. Check for dirt or grease on evaporator fan or fan
deck and clean if necessary.
6. Check evaporator coil for cleanliness or obstruc-
tions. Wash with fresh water (Refer to Section
7.13 ).
7. Check defrost drain pans and drain lines for
obstructions and clear if necessary. Wash with
fresh water.
8. 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 (Refer to Section 7.10 ).
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 (if applica-
ble).
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 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 position “O” (OFF).
2. Plug the 460VAC (yellow) cable into a de-ener-
gized 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 to 190/230VAC Power (option)
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 pro-
vide 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.
1. Make sure that the start-stop switch (ST, on con-
trol panel) and circuit breakers CB-1 (in the con-
trol box and CB-2 (on the transformer) are in
position “O” (OFF). Plug in and lock the 460VAC
power plug at the receptacle on the transformer.
2. Plug the 230VAC (black) cable into a de-ener-
gized 190/230VAC, 3-phase power source.
Energize the power source. Set circuit breakers
CB-1 and CB2 to position “I” (ON). Close and
secure control box door.
Figure 5.1 Autotransformer
5.3 ADJUST FRESH AIR MAKEUP VENT
The purpose of the fresh air makeup vent is to provide
ventilation for commodities that require fresh air circu-
lation. The vent must be closed when transporting fro-
zen foods.
Dual Voltage
Modular
Autotransformer
Circuit Breaker
(CB-2)
230-Volt
460 VAC Power
Receptacle
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