6
18-GF84D1-1B-EN
Product Background
These air handlers are versatile upflow only models
that can be recess mounted or flush mounted onto
walls. These air handlers have the following standard
features:
• AApppplliiccaattiioonn VVeerrssaattiilliittyy:: This unit is designed for
use in front or bottom return air position. Offset
hanging brackets attach to unit and wall to allow
hanging inside closet. Product design for use with
A2L refrigerant are equipped with an A2L
refrigerant detection system (RDS), which includes
A2L Sensor, Mitigation Control Board, and Wiring
Harnesses. Refer to the wiring and operation
instructions of this manual. Product design for use
with A2L refrigerant are marked with R454B
refrigerant specified on the nameplate, and the
product will be marked with the following symbols:
• MMoottoorr: Constant torque ECM speeds and torques
are controlled by software embedded in the motor
to maintain constant torque. Motors are pre-
programmed at the factory.
• CCaabbiinneett: Sturdy, short, galvanized steel cabinet
with painted front panels. Cabinet fully insulated
with 1/2” faced insulation to prevent sweating and
mold growth, to encapsulate glass fibers, and to
provide excellent R-value. Stick pins ensure
insulation remains in place. Units ship with
disposable filter in filter rack.
• MMoodduullaarr EElleeccttrriicc HHeeaatt KKiittss: Heat kits available
with either circuit breakers or terminal blocks.
Available in 5, 8, & 10 KW. Models with electric heat
include sequencers and temperature limit switches
for safe, efficient operation. Modules are easily
installed in the field using Molex plugs or can be
ordered factory installed. Controls are accessible
from the front for easy service. Electrical
connections can be made from the top or left.
Disconnect does not protrude through the wall
panel. Fan time delay relay standard for increased
efficiency.
• BBlloowweerr: Direct drive multi-speed blowers circulate
air quietly and efficiently. Motor speeds can be
easily selected via motor terminals. Swing mounted
blowers can be easily removed for service.
• EElleeccttrroonniicc CCiirrccuuiitt BBooaarrdd: Electronic circuit board
provides 30 sec. ON/OFF blower time delay
extracting more heat/cool from the coil
• DDXX CCooiill: High efficiency rifled aluminum tubes and
enhanced aluminum fins provide maximum heat
transfer. All coils factory leak tested with two stage
pressure decay and mass spectrometer process
then nitrogen pressurized, and factory sealed for
maximum reliability. Coil mounted Schrader allows
pre-installation pressure testing. Available with
either check style flowrater or TXV metering device.
Galvanized metal drain pan with bottom primary
and secondary drain connections or alternate right
side primary. All connections 3/4” FPT. Access door
allows for coil cleaning.
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