Carrier 48LC Series - Economizer Systems; Comfortlink (Factory Option); Rtu Open Control System; Vfd Operation with Remote Keypad

34
ECONOMIZER SYSTEMS
The 48LC 04--06 units may be equipped with a
factory--installed or accessory (field--installed) economizer
system. Two types are available: with a logic control
system (EconoMi$er X) and without a control system
(EconoMi$er2, for use with external control systems such
as RTU Open). See Fig. 42 for component locations on
EconoMi$er2. See Fig. 43 for EconoMi$er2 wiring
diagrams.
For details on operating 48LC units equipped with the
factory--installed EconoMi$er X option, refer to
EconoMi$er X Factory--Installed Option Low Leak
Economizer for 2 Speed SAV
t (Staged Air Volume)
Systems (Catalog No. LLECON--02SI, or later).
ECONOMI$ER2
PLUG
BAROMETRIC
RELIEF
DAMPER
OUTDOOR
AIR HOOD
HOOD
SHIPPING
BRACKET
GEAR DRIVEN
DAMPER
C06022
Fig. 42 -- EconoMi$er2 Component Locations
NOTES:
1. Switch on actuator must be in run position for economizer to operate.
2. 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor
50HJ540573
ACTUATOR
ASSEMBLY
DIRECT DRIVE
ACTUATOR
NOTE 2
NOTE 1
RUN
500 OHM
RESISTOR
OAT SENSOR
VIOLET
PINK
BLACK
TRANSFORMER
GROUND
BLUE
RED
WHITE
24 VAC
4-20mA SIGNAL
YELLOW
ECONOMI$ER2 PLUG
4
3
5
2
8
7
1
10
11
9
12
6
C14042
Fig. 43 -- EconoMi$er2 with 4 to 20 mA Control Wiring
ComfortLINK (Factory Option)
For details on operating 48LC 04--06 units equipped with the
factory installed ComfortLINK option, refer to Controls,
Start--Up, Operation and Troubleshooting for 48/50LC
04--06 Single Package Rooftop Unit with ComfortLINK
Controls (Catalog No. 48--50LC--C01T, or later).
RTU Open (Factory Option)
For details on operating 48LC 04--06 units equipped with the
factory installed RTU Open option, refer to Controls,
Start--Up, Operation and Troubleshooting for 48/50TC04--30,
50TCQ04--24, 48/50HC04--28, 50HCQ04--12, 48/50LC
04--06 Factory Installed Option RTU Open (Catalog No.
48--50HCTQ--02T, or later).
VFD Operation with Remote Keypad
All 48LC size 04--06 units are equipped with a VFD
(Variable Frequency Drive) to automatically adjust the
indoor fan motor speed in sequence with the unit’s
ventilation, cooling and heating operation. The VFD
keypad is included as standard on electro mechanical and
RTU Open models.
For details on using the VFD keypad, see the APPENDIX
at the end of the unit’s Installation Instructions (refer to
48LC Single Package Rooftop Gas Heating/Electric
Cooling Unit with Puron (R--410A) Refrigerant, Sizes: 04,
05, 06).
48LC