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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. 8.
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
FIELD POWER
WIRING
FIELD GROUND
WIRING
Fig. 8 − Line Power Connections
Connect Control Wiring
Route low voltage control wires through control wiring grommet
and connect leads to control board.
For 25HNA9 models, connect to Infinity connections ABCD
only. Standard non−communicating thermostats are not allowed
unless it is an emergency that User Interface is not working
properly and new User Interface is not available. For emergency
use, connect to standard thermostat connections R, C, W, Y1, Y2,
and O.
NOTE: When unit is operating in emergency mode, STATUS
light will flash rapidly. Unit will operate in high stage ONLY.
For 25HNA6 models, connect to ABCD for Infinity Control or
standard thermostat connections R, C, W1, Y1, Y2, and O.
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.
CONTACTOR
GROUND
LUG
A91056
Step 10
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.
NOTE: On 25HNA6 models, starting the compressor without a
minimum of 12 hours of crankcase heat prior to initial start−up
may result in a compressor chattering noise and possible damage
to the compressor.
Step 11
Install Accessories
Refer to the individual instructions packaged with kits or
accessories when installing.
Step 12
Make Airflow Selections for 25HNA6 Series Only
Using Non−Communicating (Non−Infinity) Thermostats
Airflow Selection for 58CVA/58MVB Furnaces
The 58CVA/58MVB variable−speed furnaces provide high−and
low−stage blower operation to match the capacities of the
compressor at high and low stages. To select the recommended
airflow and for adjustments to the manual switches labeled
SW1−5, AC, and CF on the control board, refer to the furnace
Installation Instructions. The 58CVA/58MVB utilizes a control
center that allows the installing technician to select the proper
airflows. The HP switch determines the airflow during high−stage
compressor operation. Airflow for high− and low−stage can be
calculated at either 350 CFM per ton or 400 CFM per ton, based
on the positions of SW1−5.
When using communicating (Infinity) control, dipswitch
adjustments are not necessary on furnaces.
determined by Infinity Control setup.
Airflow Selection for FV4 Fan Coils for 25HNA6 Series Only
Using Non−Communicating (Non−Infinity) Thermostats
The FV4 provides high− and low−stage blower operation to
match the capacities of compressor at high− and low−stage. To
select recommended airflow, refer to FV4 Installation
Instructions. The FV4 utilizes an Easy Select control board that
allows the installing technician to select proper airflows. For
adjustments to control board, select appropriate HP SIZE and
CFM ADJUST setting. This fan coil has an adjustable blower off
delay factory set at 90 sec for high− and low−stage blower
operation.
For other combinations of equipment consult Product Data
Digest.
8
Airflows are
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