Carrier WeatherExpert 48N2 Installation Instructions Manual page 32
Packaged rooftop cooling units with gas heat and comfortlink controls
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LEGEND
ACC FSS — Accessory Fan Status Switch
APS
— Air Pressure Switch
CB
— Circuit Breaker
CEM
— Controls Expansion Module
CMR
— Compressor Modulation Relay
CO
— Convenience Outlet
CXB
— Compressor Expansion Board
EXB
— Economizer Control Board
EXV
— Expansion Valve Control Board
FS/FP
— Filter Switch/Filter Pressure
GND
— Ground
LVT
— Low Volume Terminal
MBB
— Main Base Board
PPSS
— Plenum Pressure Safety Switch
RACFM
— Return Air cfm
RXB
— Rooftop Control Board
SACFM
— Supply Air cfm
SCB
— Staged Gas Control Board
TB
— Terminal Block
UPC
— Unitary Protocol Converter
Fig. 24 — Control Box Component Arrangement
32
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