Carrier Streamline Scroll 69NT20-531-300 User Manual
Page 19
T-309
2-5
2.1.6 Control Box Section
The control box (Figure 2-5) includes the manual
operation switches; circuit breaker (CB-1); compressor,
fan and heater contactors; control power transformer;
fuses; key pad; display module; current sensor module;
controller module expansion module and the
communications interface module.
2.1.7 Communications Interface Module
The communications interface module is a slave
module which allow communication with a master
central monitoring station. The module will respond to
communication and return information over the main
power line. Refer to the master system technical manual
for further information.
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1. Compressor Phase A Contactor
2. Compressor Phase B Contactor
3. Heater Contactor
4. Display Module
5. Communications Interface Module
6. Controller/DataCORDER Module (Controller)
7. Expansion Module
8. Key Pad
9. Start-Stop Switch
10. Remote Monitoring Receptacle
11. Manual Defrost Switch
12. Condenser Fan Switch
13. Controller Battery Pack
14. Interrogator Connector (Box Location)
15. Control Transformer
16. Evaporator Fan Contactor - High
17. Evaporator Fan Contactor - Low
18. Condenser Fan Contactor
19. Circuit Breaker -- 460V
20. Current Sensor Module
Figure 2-5 Control Box Section