Step 6 - Adjust Evaporator-Fan Speed - Carrier 50LJ008 Installation, Start-Up And Service Instructions Manual

Single-package rooftop cooling units
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Table 3 ~ Heat Anticipator Settings
UNIT VOLTAGE
208/230
I 1
460
1
I
575
UNIT
Configuration
|
1
Configuration
|
Configuration
Heater kW
1 Stage
2 Stage
] Heater kW
1 Stage
2 Stage
| Heater kW
1 Stage
2 Stage
Stage 1
Stage 1
Stage 2
Stage 1
Stage 1
Stage 2
Stage 1
Stage 1
1
Stage 2
104, 160
03
NA
NA
139, 165
03
NA
NA
18 0, 36 0
0.3
NA
NA
50LJ
32 0, 24 8
06
0.3
03
27 8, 33 0
42 4, 50 0
0 9
06
03
41 7, 50 0
06
03
03
54.0
0.6
03
1
03
THERMOSTAT CONNECTIONS
THERMOSTAT
THREE-PHASE
POWER SUPPLY
LEGEND
BAT
C
DAT
EWIC/EMFC
EMO/EMFO
EQUIP
GND
IFC
Battery
Contactor
Discharge-Air Thermistor
Energy Management Closed
Energy Management Open
Equipment
Ground
Indoor-Fan Contactor
IFR
OFC
-
P
-
TB
TRAN -
Indoor-Fan Relay
Outdoor (Condenser) Fan Contactor
Plug
Terminal Block
Transformer
Field Wiring
Factory Wiring
Fig. 8 — Control Wiring Connections
Step 6 — Adjust Evaporator-Fan Speed
— Adjust
evaporator-fan speed to meet jobsite conditions.
For units with electric heating, required minimum cfm is
2250 for 50U008; 2550 for 50LJ009; and 3000 for 50LJ012
and 014 with the following exceptions.
UNIT
UNIT
VOLTAGE
HEATER
kW
UNIT
CONFIG-
ATION
REQUIRED
MINIMUM
CFM
208/230
42 4
Horizontal
3200
50LJ012
and 014
208/230
50.0
Horizontal
3200
460
50.0
Horizontal
or
Vertical
3200
50LJ008-
575
180
Horizontal
or
Vertical
2800
014
36 0
2350
Table 4 shows fan rpm motor pulley settings, Table 5
shows motor efficiencies and Table 6 gives accessory static
pressure drops. Refer to Tables 7-12 to determine fan speed
settings. Fan motor pulleys are factory set for speed shown
in Table 1.
9

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