Install Accessories, Make Airflow Selections

286A / 288A

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

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

FIELD POWER

WIRING

FIELD GROUND

WIRING

CONTACTOR

GROUND

LUG

A91056

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

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.

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.