York P*UR Installation Instructions Manual page 10

FILTER RACK
(FACTORY SUPPLIED)
A
A
NOTE: FILTER ACCESS THRU DUCT-
WORK MUST BE PROVIDED FOR
REMOVAL AND CLEANING
FILTERS
FILTER
DUCTWORK
RACK
CROSS SECTION A-A
(WITH PLENUM AND FILTERS)
downflow filters
FIGURE 6 :
Combustible Floor Base Accessory
FIGURE 7 :
10
RACK AND FILTERS SECURED
INSIDE BLOWER SECTION
FOR SHIPMENT
CASING SIZE DIMENSION FH
16-1/4 12-3/4
22-1/4 11
26-1/4 8-1/4
BRANCH
DUCTS
FH
DOWNFLOW/HORIZONTAL MODELS
HORIZONTAL APPLICATION
Downflow furnaces may be installed horizontally with the sup-
ply airflow toward the left or right by laying the unit on the left
or right side panel.
Do not install the unit on the rear panel.
After determining the best orientation, lay the unit on top of
the shipping carton to protect the finish. The appropriate elec-
trical knock-outs for power wiring, control wiring and gas pip-
ing should be removed at this time.
For horizontal application, return air must enter through the
end only. Return air may not be connected into the rear or
side panels of the unit.
HORIZONTAL FILTERS
All filters and mounting provision must be field supplied. Fil-
ters(s) may be located in the duct system external to the fur-
nace or in a return filter grille(s). Refer to furnace accessories
on Page 31 for external filter kit options.
ATTIC INSTALLATION
LINE CONTACT ONLY PERMISSIBLE
BETWEEN LINES FORMED BY THE
INTERSECTION OF FURNACE TOP
AND TWO SIDES AND BUILDING
JOISTS, STUDS OR FRAMING
GAS PIPING
RETURN AIR
SEDIMENT
TRAP
typical attic installation
FIGURE 8 :
035-17477-001 Rev. A (801)
SUPPLY AIR
VENT (Maintain
required clearances
to combustibles)
SHEET METAL
IN FRONT OF
FURNACE
COMBUSTION AIR
OPENINGS IS
RECOMMENDED
30" MIN.
WORK AREA
12"
Unitary Products Group