NOTE:Operationofunitonimproperlinevoltageconstitutes
abuseandcouldaffectunitreliability.Seeunitratingplate.Donot
installunitinsystemwherevoltagemayfluctuateaboveorbelow
permissiblelimits.
NOTE:Usecopperwireonlybetweendisconnectswitchandunit.
NOTE:InstallbranchcircuitdisconnectofadequatesizeperNEC
tohandleunitstartingcurrent.Locatedisconnectwithinsightfrom
andreadilyaccessiblefromunit,perSection440-14ofNEC.
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.
ELECTRICALSHOCK 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. 5.
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
FIELD POWER ]
WIRING
CONTACTOR
FIELD GROUND
WIRING ] GROUND
LUG
Fig. 5 - Line Power Connections
Connect Control Wiring
A91056
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, YI, 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, WI, YI, Y2, and O.
General Information
Use No. 18 AWG color-coded, insulated (3. 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.
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.
Install Accessories
Refer to the individual instructions packaged with kits or
accessories when installing.
Make Airflow Selections
Airflow Selection for Variable Speed Furnaces for
25HNA6 models only Using Non-Communicating
(non-Infinity) Thermostats
The variable speed furnaces provide blower operation to match the
capacities of the compressor during high and low stage cooling
operation, The furnace control board allows the installing
technician to select the proper airflows for each stage of cooling.
Below is a summary of required adjustments. See furnace
installation instructions for more details:
1. Turn SWl-5 ON for 400 CFM/ton airflow or OFF for 350
CFM/ton airflow. Factory default is OFF.
2. The A/C DIP switch setting determines airflow during high
stage cooling operation. Select the A/C DIP switch setting
corresponding to the available airflow shown in the furnace
installation instructions that most closely matches the re-
quired airflow shown in the air conditioning Product Data
for HIGH speed.
3. The CF DIP switch setting determines airflow during low
stage cooling operation. Select the CF DIP switch setting
corresponding to the available airflow shown in the furnace
installation instructions that most closely matches the re-
quired airflow shown in the air conditioning Product Data
for LOW speed.
If a higher or lower Continuous Fan speed is desired, the
Continuous Fan speed can be changed using the fan switch on the
thermostat. Refer to the furnace installation instructions for details
of how to use this feature.
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 thatallows 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.
When using a communicating (Infinity) control, dipswitch
adjustments are not necessary. Airflows are determined by Infinity
Control setup. The fan coil is the FE4A or FE5A.
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