Step 8 -Make Electrical Connections - Carrier BASE 25HBR Installation Instructions Manual

STEP 8 —Make Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not supply power to unit with compressor terminal
box cover removed.
NOTE: Use copper wire only between disconnect switch and
unit.
NOTE: Install branch circuit disconnect of adequate size per
NEC to handle unit starting current. Locate disconnect within
sight from and readily accessible from unit, per Section 440- -14
of NEC.
Route Ground and Power Wires
Remove access panel to gain access to unit wiring. Extend wires
from disconnect through power wiring hole provided and into
unit control box.
Connect Ground and Power Wires
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 8.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
The unit cabinet must have an uninterrupted or unbroken
ground to minimize personal injury if an electrical fault
should occur. The ground may consist of electrical wire or
metal conduit when installed in accordance with existing
electrical codes.
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 8.
DISCONNECT
PER N.E.C. AND/OR
LOCAL CODES
FIELD POWER
WIRING
3 PHASE ONLY
FIELD GROUND
WIRING
Fig. 8 --- Line Connections
CONTACTOR
BLUE
GROUND
LUG
A94025
Fig. 9 --- 3- -Phase Monitor Control
(Applies to 3- -Phase Units Only)
Table 3—3 ---Phase Monitor LED Indicators
LED
OFF
FLASHING
ON
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Ensure compressor rotation is correct.
S 3- -phase scroll compresors are rotation
sensitive.
S A flash LED on phase monitor indicates
reverse rotation. (See Fig. 9 and Table 3)
This will not allow contractor to be energized.
S Disconnect power to unit and interchange 2
field- -wiring leads on unit contactor.
7
A00010
STATUS
No call for compressor opera-
tion
Reversed phase
Normal