33MCP15-500.7
UNIT COMPONENT IDENTIFICATION / LOCATION
Figure 33.1 - Controls Cabinet - C-Cabinet Sized Units j
For units where unit serial number Digit 12=2 (Carel EVD Superheat Controller)
1 (S) High voltage power distribution block
2 (S) Condenser fan motor circuit breakers (qty. 2 on 15 ton,
3 on 20-30 ton)
3 (O) Hot gas reheat circuit shut-off valve
(not shown, located in coil compartment)
4 (O) Hot gas reheat modulating valves
5 Not applicable
6 (S) Tandem digital scroll compressor set
7 (S) Carel EVD superheat/electronic expansion valve controller
with Carel Ultracap
8 (S) Carel microprocessor controller (main)
9 (S) Carel microprocessor controller (expansion module)
10 (S) Low voltage wiring terminal strip with ground terminals
11 (S) Low voltage wiring channels
12 (S) Low voltage isolation transformer for Carel microprocessor
controller
13 Not Applicable
14 (S/O) Double pole, double throw relay(s)
(ex: smoke detector interlock, exhaust fan interlock, etc.)
15 (S) High voltage wiring channels
16 (O) Supply voltage/phase monitor
17 (S) Condenser fan variable frequency drive circuit breaker
18 (O) Supply fan variable frequency drive circuit breaker
1
3
11
11
12
14
30
29
28
32
33
31
27
25
26
15
15
15
78 9
10
4
4
6 6
2 2 217 20 21 25
16
34
18
19
22
23
24
19 (O) Power exhaust fan contactor/variable frequency drive
circuit breaker
20 (S) Main controls step-down transformer primary circuit
breaker
21 (O) Gas heating circuit step-down transformer primary and
secondary circuit breakers
22 (O) Convenience outlet step-down transformer primary
circuit breaker (if factory powered)
23 (O) Convenience outlet step-down transformer secondary
circuit breaker (if factory powered)
24 (S) Main controls step-down transformer secondary circuit
breaker
25 (S) High voltage wiring terminal strip with ground terminals
26 (S) Compressor crankcase heater circuit breaker
27 (S) Compressor contactors
28 (O) Condensing gas heating strip heater contactor
29 (S) Condenser fan variable frequency drive
30 (S) Supply fan motor starter
(O) Supply fan variable frequency drive
31 (S) Solid state relay for Carel controller
32 (O) Factory powered convenience outlet disconnect switch
33 (O) Main unit deadfront disconnect
34 (O) Auxiliary / Supplementary electric heat circuit breaker
(S) = standard (O) = optional
j Location of components is typical, but may change depending on the configuration of the unit. For units where unit serial number Digit 12=1 (Emerson EC3
Superheat Controller), refer to previous version Installation & Service Manual MCP15-500.6 for location of components.
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