035-14520-001 Rev. B (0803)
4
Unitary Products Group
HORIZONTAL DRAIN PAN INSTALLATION /
CONVERSION
These air handler units are supplied ready to be installed in a
right hand horizontal position when a horizontal pan is factory
installed. If unit requires field installation of a horizontal pan or
requires left hand positioning, the unit must have the pan
installed in the correct position.
NOTE:
Models bearing a “H” indicates the unit has horizontal
drain pan factory installed in position “A”. (See Figure 4).
1.
Remove blower access, coil access, and center access
panels.
NOTE:
Conversion must be made before brazing the refriger-
ant connections to the coil.
2.
See Figure 4, remove two screws from horizontal drain
pan, to remove pan from position “A” if factory installed.
3.
Position horizontal pan, as required in either “A” or “B”
position, locking it into the vertical drain pan as shown.
4.
Horizontal drain pans have 4 plugged drains. Remove
plugs from connections being used.
NOTE:
If this step is overlooked, it can lead to a water prob-
lem later.
5.
Use removed plug to plug primary of upflow drain pan.
6.
Attach horizontal pan with 2 screws removed in step no.
2 or supplied with the unit. Ensure that the drain pan is
lying flat against the insulation of the cabinet.
7.
Horizontal drain cutout in the center access panel should
be removed by using a utility knife (if not previously cut
out).
8.
Re-position and replace access panels.
DO NOT TRY TO KNOCK OUT.
Models F(2,3)FP045,048,060 have a coil baffle and
support bracket factory installed for right hand hori-
zontal application (refer to Figure 4C). For left hand
applications the coil support bracket must be moved
to the right side of the coil, and the coil baffle must
be rotated to avoid water blow-off.
To rotate baffle, remove the coil assembly from the
unit (remove front two screws holding the coil sup-
port bracket and the two screws holding the drain
pan). Remove four screws in coil baffle and remove
the coil baffle and rotate ends.
Resecure the baffle and reinstall the coil assembly
ensuring that the rear of the drain pan is secured
under the back flange of the unit. Reinstall the coil
support bracket on the right side of the coil.
FIGURE 4 :
Filter Access & Drain Pan Conversion / Coil Baffle
FILTER
4B - SIDE VIEW
"S" BRACKET MUST BE USED TO
FASTEN DUCT WORK TO FRONT OF UNIT
RETURN AIR DUCT
3/4" PVC SOCKETS
FOR HORIZONTAL
DRAIN APPLICATION
HORIZONTAL
DRAIN PAN
POSITION "A”
HORIZONTAL
DRAIN PAN
POSITION "B”
PRIMARY DRAIN UPFLOW
3/4” THREADED
SECONDARY
DRAIN UPFLOW
3/4" THREADED
BLOWER
HOUSING
COIL COMPARTMENT
(ACCESS PANEL REMOVED)
FILTER
BLOWER
COMPARTMENT
(ACCESS PANEL
REMOVED)
CENTER ACCESS PANEL
PRIMARY
DRAIN
SECONDARY
DRAIN
VERTICAL
DRAIN PAN
SECONDARY
DRAIN
PRIMARY
DRAIN
4C - FRONT VIEW
4A - FRONT VIEW
DUCT WORK MAY BE FASTENED
CAUTIOUSLY WITH SCREWS TO
THE SIDES AND REAR OF UNIT
SUPPORT
BRACKET
060 COIL BAFFLE
(SHOWN IN
RIGHT-HORIZONTAL
POSITION)
