Electrical Shock Hazard - Carrier Infinity 25HNB6 Installation Instructions Manual

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. (See Fig. 5)
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1 2
MINUTES
Fig. 5 - - 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, making sure wire ties on feeder tubes are
secure and tight.
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.
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.
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.
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 and Power Wires
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 6.
LEAK IN
SYSTEM
VACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM
3 4 5 6 7
A95424
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
FIELD POWER
WIRING
FIELD GROUND
WIRING
Fig. 6 - - Line Power Connections
Connect Control Wiring
Route low voltage control wires through control wiring grommet
and connect leads to control board.
Connect to Infinity connections AB only when Infinity User
Interface is available. If additional grounded is needed, use C
terminal.
Standard non- -communicating thermostat connections are possible
when you connect to standard thermostat connections W, Y1, Y2,
and O. If additional grounding is needed, use C terminal. Refer to
wiring label for further clarification.
General Information
Use No. 18 AWG color- -coded, insulated (35°C minimum) wire for
all installations.
All wiring must be NEC Class 1 and must be separated from
incoming power leads.
Use furnace transformer, fan coil transformer, or accessory
transformer for control power, 24v/40va minimum. The outdoor
unit requires a minimum of 27va/24vac control power.
Final Wiring Check
IMPORTANT: Check factory wiring and field wire connections
to ensure terminations are secured properly. Check wire routing to
ensure wires are not in contact with tubing, sheet metal, etc.
Compressor Crankcase Heater
Furnish power to crankcase heater a minimum of 24 hr before
starting unit. To furnish power to heater only, set thermostat to
OFF and close electrical disconnect to outdoor unit.
Airflow Setup for Infinity Control Furnace or FE
Fan Coil (communicating)
When using an Infinity User Interface, airflow is automatically
selected based on equipment size. See User Interface Installation
Instructions and heat pump Product Data for available adjustments.
Airflow Selections (ECM Furnaces- - non commu-
nicating)
The ECM Furnaces provide blower operation to match the
capacities of the compressor during high and low stage cooling
operation. Tap selections on the furnace control board enable the
installing technician to select the proper airflows for each stage of
cooling. Below is a brief summary of the furnace airflow
configurations
1. The Y2 call for high stage cooling energizes the "Cool" tap
on the control board. The grey wire from cool tap is connec-
ted to tap 5 on the motor. Refer to the furnace Product Data
to find the corresponding airflow. If the airflow setting for
high cooling needs to be switched from tap 5 to a different
tap, jumper a connection from the cool tap to the desired tap
so that the Y2 signal is communicated via the cool tap to the
desired speed tap.
NOTE: Both Y1 and Y2 may be energized for high stage.
5
CONTACTOR
GROUND
LUG
A91056