11
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
The conversion of the fan coil to downflow requires special
procedures for the condensate drains on both A--coil and
slope units. The vertical drains have an overflow hole
between the primary and secondary drain holes. This hole is
plugged for all applications except downflow, but must be
used for downflow. During the conversion process, remove
the plastic cap covering the vertical drains only and discard.
Remove the plug from the overflow hole and discard. At
completion of the downflow installation, caulk around the
vertical pan fitting to door joint to retain the low air leak
performance of the unit.
CAUTION
!
Units are equipped with primary and secondary 3/4--in. FPT drain
connections. For proper condensate line installations see Fig. 1, 2,
3, 5 and 6. To prevent property damage and achieve optimum
drainage performance, BOTH primary and secondary drain lines
should be installed and include properly--sized condensate traps.
(See Fig. 18 and 20.)
Factory--approved condensate traps are
available. It is recommended that PVC fittings be used on the
plastic condensate pan. Finger--tighten plus 1--1/2 turns. Do not
over--tighten. Use pipe dope.
2” MIN
(51 mm)
UNIT
2” MIN
(51 mm)
A03002
Fig. 18 -- Recommended Condensate Trap
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or
property damage.
Shallow running traps are inadequate and DO NOT allow
proper condensate drainage. (See Fig. 19.)
CAUTION
!
DO NOT USE SHALLOW RUNNING TRAPS!
A03013
Fig. 19 -- Insufficient Condensate Trap
NOTE
: When connecting condensate drain lines, avoid blocking
filter access panel, thus preventing filter removal. After
connection, prime both primary and secondary condensate traps.
NOTE
: If unit is located in or above a living space where
damage may result from condensate overflow, a field--supplied,
external condensate pan should be installed underneath the entire
unit, and a secondary condensate line (with appropriate trap)
should be run from the unit into the pan. Any condensate in this
external condensate pan should be drained to a noticeable place.
As an alternative to using an external condensate pan, some
localities may allow the use of a separate 3/4--in. condensate line
(with appropriate trap) to a place where the condensate will be
noticeable. The owner of the structure must be informed that
when condensate flows from the secondary drain or external
condensate pan, the unit requires servicing or water damage will
occur.
Install traps in the condensate lines as close to the coil as possible.
(See Fig. 20.) Make sure that the outlet of each trap is below its
connection to the condensate pan to prevent condensate from
overflowing the drain pan. Prime all traps, test for leaks, and
insulate traps if located above a living area. Condensate drain
lines should be pitched downward at a minimum slop of 1 in. for
every 10 ft of length.
Consult local codes for additional
restrictions or precautions.
Step 8—Accessories
A. Electronic Air Cleaner
The Electronic Air Cleaner may be connected to fan coil as
shown in Fig. 21. This method requires a field supplied
transformer. See Electronic Air Cleaner literature for kit
requirements.
B. Humidifier
Connect humidifier and humidistat to fan coil unit as shown in
Fig. 22 and Fig. 23. The cooling lockout relay is optional.
FX4
C
/F
Y4
A
