Carrier 69NT40-561-300, Operation And Service Manual

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T-365 7–44
7.28 MAINTENANCE OF PAINTED SURFACES
The refrigeration unit is protected by a special paint system against the corrosive atmosphere in which it normally
operates. However, should the paint system be damaged, the base metal can corrode. In order to protect the
refrigeration unit from the highly corrosive sea atmosphere, or if the protective paint system is scratched or dam-
aged, clean the area to bare metal using a wire brush, emery paper or equivalent cleaning method. Immediately
following cleaning, apply paint to the area, and allow to dry. Refer to the Parts List for proper paint selection.
7.29 COMMUNICATIONS INTERFACE MODULE INSTALLATION
Figure 7.31 Communications Interface Installation
Units that have been factory provisioned for installation of a Communication Interface Module (CIM) have the
required wiring installed. If the unit is not factory provisioned, a provision wiring kit (Carrier Transicold part number
76-00685-00) must be installed. Installation instructions are packaged with the kit.
To Install the Module:
WARNING
!
Installation requires wiring to the main unit circuit breaker, CB1. Make sure the power to the
unit is off and power plug disconnected before beginning installation.
1. CB1 is connected to the power system, see wiring schematic. Ensure that the unit power is off AND that the
unit power plug is disconnected.
2. Open control box, (see Figure 7.31 ) and remove low voltage shield. Open high voltage shield.
3. If using factory provisioned wiring, remove the circuit breaker panel, with circuit breaker, from the control
box. Locate, wires CB21/CIA3, CB22/CIA5 and CB23/CIA7 that have been tied back in the wire harness.
Remove the protective heat shrink from the ends of the wires.
4. Refit the circuit breaker panel.
5. Fit the new CIM into the unit.
6. Attach three wires CB21/CIA3, CB22/CIA5 and CB23/CIA7 to the CIM at connection CIA.
7. Locate connectors CIA and CIB, remove plugs if required, and attach to the module.
8. Replace the low voltage shield.
CB1 Communications