6
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. 5.
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
CONTACTOR
GROUND
LUG
FIELD GROUND
WIRING
FIELD POWER
WIRING
A91056
Fig. 5 -- Line Power Connections
Connect Control Wiring
Route low voltage control wires through control wiring grommet
and connect leads to control board.
For Evolution, connect to ABCD only.
For standard
non--communicating thermostats, connect to standard thermostat
connections R, C, W, 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.
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 286A 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 Setup for Evolution Control Furnace of FE
Fan coil (communicating)
When using an Evolution User Interface, airflow is
automatically selected based on equipment size. See User
Interface
Installation
Instructions
for
available
adjustments.
Airflow Selection for Variable Speed Furnaces for
Non--Communicating (non--Evolution) 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 SW1--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 Non--Commu-
nicating (Non--Evolution) Thermostats
The FV4B provides high-- and low--stage blower operation to
match the capacities of 286A compressor at high-- and low--stage.
The FV4C provides high-- and low--stage blower operation to
match the capacities of 288A compressor at high-- and low--stage
(units containing circuit board HK38EA015 or newer). 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.
286A
/288A
