All Fuel Kit Install Instructions

ManualsBrandsGoodman Manualsair conditioning coolingOT18 60A Outdoor Heat Pump Stat

AFE18-60A

5151 San Felipe, Suite 500, Houston, TX 77056

www.goodmanmfg.com

P/N: IO-627A Date: October 2008

ATTENTION INSTALLING PERSONNEL

As a professional installer you have an obligation to know the product better than the customer. This

includes all safety precautions and related items.

Prior to actual installation, thoroughly familiarize yourself with this Instruction Manual. Pay special

attention to all safety warnings. Often during installation or repair it is possible to place yourself in a

position which is more hazardous than when the unit is in operation.

Remember, it is your responsibility to install the product safely and to know it well enough to be able to

instruct a customer in its safe use.

Safety is a matter of common sense...a matter of thinking before acting. Most dealers have a list of

specific good safety practices...follow them.

The precautions listed in this Installation Manual are intended as supplemental to existing practices.

However, if there is a direct conflict between existing practices and the content of this manual, the

precautions listed here take precedence.

DESCRIPTION

The AFE18 control is designed for use in heat pump

applications where the indoor coil is located above/down-

stream of a gas or fossil fuel furnace. It will operate with

single and two stage heat pumps and single and two stage

furnaces. The AFE18 control will turn the heat pump unit off

when the furnace is turned on. An anti-short cycle feature

is also incorporated which initiates a 3 minute timed off

delay when the compressor goes off. On initial power up or

loss and restoration of power, this 3 minute timed off delay

will be initiated. The compressor won’t be allowed to restart

until the 3 minute off delay has expired. Also included is a

5 second de-bounce feature on the “Y, E, W1 and O”

thermostat inputs. These thermostat inputs must be present

for 5 seconds before the AFE18 control will respond to it.

An optional outdoor thermostat, OT18-60A, can be used

with the AFE18 to switch from heat pump operation to

furnace operation below a specific ambient temperature

setting, i.e. break even temperature during heating. When

used in this manner, the “Y” heat demand is switched to the

“W1” input to the furnace by the outdoor thermostat and the

furnace is used to satisfy the first stage “Y” heat demand.

On some controls, if the outdoor thermostat fails closed in

this position during the heating season, it will turn on the

furnace during the cooling season on a “Y” cooling demand.

In this situation, the furnace produces heat and increases

the indoor temperature thereby never satisfying the cooling

demand. The furnace will continue to operate and can only

be stopped by switching the thermostat to the off position or

removing power to the unit and then replacing the outdoor

thermostat. When the AFE18 receives a “Y” and “O”

input from the indoor thermostat, it recognizes this as a

cooling demand in the cooling mode. If the outdoor thermo-

stat is stuck in the closed position switching the “Y” demand

to the “W1” furnace input during the cooling mode as

described above, the AFE18 won’t allow the furnace to

operate. The outdoor thermostat will have to be replaced

to restore the unit to normal operation.

AFE18-60A INSTALLATION

The AFE18-60A should be installed on the side of the

furnace close to the 24Vac controls wires for field connec-

tions. The system must be connected in accordance with

the wiring diagram supplied with the AFE18 control and

shown in these instructions. Standard thermostat cables

can be used for wiring connections between the thermostat

and heat pump unit. See Fig. 1.

ALL FUEL SYSTEM CONTROL BOARD

INSTALLATION INSTRUCTIONS

Summary of content (4 pages)

PAGE 1
AFE18-60A ALL FUEL SYSTEM CONTROL BOARD INSTALLATION INSTRUCTIONS Goodman Manufacturing Company, L.P. © 2004 - 2008 5151 San Felipe, Suite 500, Houston, TX 77056 www.goodmanmfg.com P/N: IO-627A Date: October 2008 DESCRIPTION The AFE18 control is designed for use in heat pump applications where the indoor coil is located above/downstream of a gas or fossil fuel furnace. It will operate with single and two stage heat pumps and single and two stage furnaces.
PAGE 2
An optional outdoor thermostat, OT18-60A, can be installed in the heat pump unit and used with the AFE18. When used, the tab on the AFE18 control board next to the terminal strip for the heat pump field wiring connections must be broken for the outdoor thermostat to function with the control. The thermostat can be field adjusted to a breakeven temperature set point appropriate for the installation.
PAGE 3
2.2 When the heat pump demand “Y” is satisfied, the room thermostat will remove the 24Vac from the “Y” terminal and the unit turns off. The defrost board will store the compressor’s accumulated run time in memory. 3.2 When a defrost cycle is initiated, the defrost board turns off the condenser fan, energizes the reversing valve and supplies 24Vac to terminals “O” and “W2” of the AFE18 to turn on the furnace during the defrost cycle.
PAGE 4
WIRING DIAGRAM WARNING ALL FUEL SYSTEM AFE18-60A CONTROL BOARD FIGURE 1. ALL FUEL CONTROL BOARD - AFE18-60A This wiring diagram is for reference only. Not all wiring is as shown above. Refer to the appropriate wiring diagram for the unit being serviced. (For use with Heat Pumps in conjunction with 80% or 90% Single-Stage or Two-Stage Furnaces) Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.