Electrical Legend - McQuay SWP Series Installation And Maintenance Manual

Electrical Data
Figure 23: A-A Section Detail, Typical 460 Volt, 6
Compressor Control Center Layout
18

Electrical Legend

ID Description
ACT3 Actuator motor, economizer
AFD10 Adjustable frequency drive,
supply fan
CB10 Circuit breaker, supply fan
CCB1, 2 Compressor control boards,
refrig. circuits
DAT Discharge air temperature
sensor
DHL Duct hi-limit
DS1 Disconnect, total unit or cond/
heat
DS2 Disconnect, SAF/RAF/controls
F1A, B Fuse, control circuit transformer
(T1), primary
F1C Fuse, control circuit transformer
(T1), secondary
FB11, 12 Fuseblock, electric heat (top
bank)
FB13, 14 Fuseblock, electric heat (bot.
bank)
HL11A, HL11B Hi-limits, pwr, elec heaters (top
bank)
HL12A, HL12B Hi-limits, pwr, elec heaters (bot.
bank)
HP1–6 Hi-pressure controls, refrig
LP1–6 Low-pressure controls,
refrigeration
M1–6, M21–26 Contactor, compressor
M9 M10 Contactor, supply fan
M30 Contactor, reversing, VFD
bypass, supply fan
MCB Microprocessor circuit board
MJ Mechanical jumper
MMP1–6, Manual motor protector,
MMP21–26 compressors
MMP9–10 Manual motor protector, supply
fan
MP1–6 Motor protector, compr.#1–6
OAT Outside air temperature sensor Shipped loose
PB1, 2 Power block, power distribution Main control box
PB10 Power block, supply fan
Standard
location
Comp/cond section
Front assembly
Main control box
Main control box
Discharge section
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Main control box
Heat section,
electric
Heat section,
electric
On compressors
On compressors
Main control box
Main control box
IVFD bypass box
Main control box
All control boxes
Main control box
Main control box
On compressors
Main control box
McQuay IM 937