Carrier 50LJ008-014 - Manual (Page 7)

Install conduit through side panel openings. Install con­
duit between disconnect and control box. Install power lines
to terminal connections as shown in Fig. 7.
Voltage to compressor terminals during operation must
be within voltage range indicated on unit nameplate (see
Table 2). On 3-phase units, voltages between phases must
be balanced within 2% and the current within 10%. Use the
formula shown in Table 2, Note 2 to determine the % volt­
age imbalance. Operation on improper line voltage or ex­
cessive phase imbalance constitutes abuse and may cause
damage to electrical components. Such operation would in­
validate any applicable Carrier warranty.
FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to installation in­
structions included with the accessory. Locate thermostat
assembly on a solid wall in the conditioned space to sense
average temperature in accordance with thermostat instal­
lation instructions.
Route thermostat cable or equivalent single leads of col­
ored wire from subbase terminals to low-voltage connec­
tions on unit (shown in Fig. 8) as described in Steps 1-4
below.
NOTE; For wire runs up to 50 ft, use no. 18 AWG (Amer­
ican Wire Gage) insulated wire (35 C minimum). For 50 to
75 ft, use no. 16 AWG insulated wire (35 C minimum).
For over 75 ft, use no. 14 AWG insulated wire (35 C min­
imum). All wire larger than no. 18 AWG cannot be directly
connected to the thermostat and will require a junction box
and splice at the thermostat.
1. If unit is mounted on roof curb and accessory thru-the-
curb service plate connection is used, route wire through
connection plate.
2. Pass control wires through the hole provided on unit (see
connection D, Connection Sizes Table, Fig. 6).
3. Feed wire through the raceway built into the corner post
to the 24-v barrier located on the left side of the control
box. See Fig. 9. The raceway provides the UL-required
clearance between the high- and low-voltage wiring
4. Connect thermostat wires to screw terminals of low-
voltage connector.
HEAT ANTICIPATOR SETTINGS - Set heat anticipator
settings as shown in Table 3.
#
BLK
YEL I I BLU
TO COMPS
'v'
TB2 I-- 1
BLK
YEL I
I 1 ' ! 1
' !
<£>
' '
^
' 1
' '
<§)
' 1 1 1
<§>
ft
TO COMPS
BLU
50LJ008-014. 575-3-60
DISCONNECT
PER NEC
FIELD POWER SUPPLY
! DÌSCONNÌCT I
I______________I
50LJ008-012, 208/230-3-60; 50LJ008-014.460-3-60
LEGEND
50LJ014, 208/230-3-60
DISCONNECT
PER NEC
C
COMP(S)
IFC
NEC
TB
Contactor
Compressor(s)
Indoor (Evaporator) Fan Contactor
National Electrical Code
Terminal Block
Terminal Block Connection
Splice Connection
Field Wiring
Factory Wiring
Fig. 7 — Power Wiring Connections