2--6
T-334
2.1.7 Control Box Section
The control box (Figure 2--6) 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 and the communications interface
module.
2.1.8 Communications Interface Module
The communications interface module is a slave
module that allows 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.
19
20
13
15
18
1
2
3
4
5
6
8
10
7
9
14
11
12
16 17
Contactor Arrangement
Normal Fan Operation
Contactor Arrangement
Three-Phase Evaporator Motors
CH
PA
HR
CF
ES EF
PB
PA
HR
CF ES EF
PB
Contactor Arrangement Shown: Single Fan Capability
1. Compressor Phase A Contactor -- PA
2. Compressor Phase B Contactor -- PB
3. Heater Contactor -- HC
4. Display Module
5. Communications Interface Module
6. Controller/DataCORDER Module (Controller)
7. Key Pad
8. Remote Monitoring Receptacle
9. Controller Battery Pack (Standard Location)
10. Interrogator Connector (Box Location)
11. Fan Mode Switch
12. Emergency Bypass Switch
13. Control Transformer
14. Evaporator Fan Contactor - EF or S2
15. Evaporator Fan Contactor - ES or E2
16
Evaporator Fan Contactor - S1
17
Evaporator Fan Contactor - E1
18. Condenser Fan Contactor
19. Circuit Breaker - 460V
20. Current Sensor Module
Figure 2--6 Control Box Section
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