3
INTRODUCTION
This manual is intended as an aid to qualified HVAC installers
during the installation of Fedders Cased Coils on upflow or
downflow furnaces. Do not install coil in horizontal position
(see illustration below).
Return
Return
Supply
Supply
Downflow
Furnace
Evaporator
Coil
Evaporator
Coil
Upflow
Furnace
Codes
The installer SHALL comply with all local, state, and federal
codes and/or regulations pertaining to this type of
equipment and its installation. Such codes and/or regulations
should take precedence over any recommendations
contained herein. Installations SHALL be made in accordance
with the National Electrical Code, local codes and
recommendations made by the National Board of Fire
Underwriters. Consult local building codes and National
Electrical Code (NEC) for special requirements.
INSTALLATION
CAUTION
EXTERIOR SURFACE COIL HOUSING MAY SWEAT WHEN
UNIT IS INSTALLED IN NON-CONDITIONED SPACE SUCH
AS AN ATTIC OR GARAGE. THE INSTALLER MUST
INSULATE THE CABINET WITH 1” FIBERGLASS
INSULATION.
INSPECTION AND UNPACKING
A thorough inspection of the shipping container should be
made immediately upon receiving your unit. Look for any
punctures or openings, and if it appears damage has
occurred, it should be noted on the freight bill before signing.
The delivering carrier should be contacted immediately to
inspect damage, and no installation work should begin until
this inspection is completed.
Installation of Evaporator Coils
The cased coil is designed to fit Fedders furnaces the same
width.
1. Set coil on upflow furnace discharge air opening.
2. Ensure coil is level for proper condensate drainage.
Do not tip coil toward condensate drain.
3. When installing wider coil on narrow furnace, use a
field supplied adapter.
4. When installing narrow coil on wide furnace, create
field fabricated adapter. Consult your dealer for
alternate installation instructions.
NOTE: In downflow position installation with Fedders
furnace, break off perforated duct flange on coil/furnace.
CAUTION
THE TXV SENSING BULB CAN BE DAMAGED BY
EXTREME HEAT FROM BRAZING. THE BULB SHOULD
BE REMOVED BEFORE PERFORMING ANY BRAZING
PROCEDURE AND NOT INSTALLED UNTIL AFTER THE
VAPOR AND LIQUID LINES ARE BRAZED AND LEAK
CHECKED.
Connect Refrigerant Piping
Use field supplied tubing of refrigerant grade. Suction tube
must be insulated. Do not use damaged, dirty, or
contaminated tubing because it may plug refrigerant flow
control device. ALWAYS evacuate the coil and field supplied
tubing before opening outdoor unit service valves.
Factory and Field-Installed Expansion Valves
1. The bulb and capillary tubing should be routed outside
of the case. Make sure the capillary tube will not
contact any sharp edges of the case. On factory
installed expansion valves, the adjustable sensing bulb
is not permanently installed onto the coils’ vapor line in
order to allow easy removal during installation.
8 o’cl
Sensing bulb
attached with
clamps
Vapor line
4 o’clock
8 o’clock
Attach bulb to
vapor line at four
or eight o’clock
position
CAUTION
THE TXV VALVE CAN BE DAMAGED BY EXTREME
HEAT. PROPER PRECAUTIONS SHOULD BE TAKEN TO
AVOID OVERHEATING THE TXV VALVE AND CAUSING
DAMAGE TO THE INTERNAL COMPONENTS.
