Make Electrical Connections; Electrical Shock Hazard - Carrier CH14NB Installation Instructions Manual

CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment damage
or improper operation.
Installation of filter drier in liquid line is required.
Evacuate Refrigerant Tubing and Indoor Coil
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Never use the system compressor as a vacuum pump.
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used (see triple evacuation
procedure in service manual). Always break a vacuum with dry
nitrogen.
Deep Vacuum Method
The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 microns and a vacuum gage capable of
accurately measuring this vacuum depth. The deep vacuum method
is the most positive way of assuring a system is free of air and
liquid water. A tight dry system will hold a vacuum of 1000
microns after approximately 7 minutes. (See Fig. 8.)
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1
Fig. 8 – Deep Vacuum Graph
Final Tubing Check
IMPORTANT: Check to be certain factory tubing on both indoor
and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, makings sure wire ties on feeder tubes are
secure and tight.
Be sure field wiring complies with local and national fire, safety,
and electrical codes, and voltage to system is within limits shown
on unit rating plate. Contact local power company for correction of
improper voltage. See unit rating plate for recommended circuit
protection device.
NOTE: Operation of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit rating plate. Do not
install unit in system where voltage may fluctuate above or below
permissible limits.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
LEAK IN
SYSTEM
VACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM
2 3 4 5 6 7 A95424
MINUTES

Make Electrical Connections

!

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
!
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. 9.
DISCONNECT
PER N.E.C. AND/OR
LOCAL CODES
FIELD POWER
WIRING
3 PHASE ONLY
FIELD GROUND
A95424
WIRING
Fig. 10 – 3–Phase Monitor Control
(Applies to 3–Phase Units Only)
5
WARNING
WARNING
CONTACTOR
BLUE
GROUND
LUG
Fig. 9 – Line Connections
Catalog No: CH14NB--- 01SI
Replaces: New
A94025
A00010