6
18-AD28D1-2
Installer’s Guide
G. FURNACE IN HORIZONTAL RIGHT POSITION
▲
CAUTION
!
Both the coil and furnace must be fully supported. Do not
attempt to suspend the coil using the brackets.
1. HORIZONTAL RIGHT COIL CONVERSION (For
4NXCD063 Coil Only).
a. For the horizontal right configurations the two-piece
factory baffle must be removed and the top baffle re-
placed for maximum efficiency.
b. Remove the factory installed two-piece baffle assem-
bly from the apex of the coil by removing the 5/16” hex
head screws. See Figure 14.
c. Replace only the top baffle using the same screws
previously removed.
d. The (2) outer water diverter baffles must be removed
for maximum efficiency.
e. Remove the coil by sliding the coil out of the coil
enclosure.
f. Remove the (2) outer water diverter baffles by remov-
ing the 5/16” hex head screws. See Figure 15.
IMPORTANT:
The 4NXC cased coil must be placed downstream of the
furnace, with the apex of the coil always pointing opposite
the direction of the airflow for horizontal right installation.
This placement supersedes previous furnace Installer's
Guide stating install "with the apex of the coil pointing in
the direction of airflow for horizontal application." See
Figure 16.
2. When the noncondensing Upflow/Horizontal furnace is
placed on its right side for right airflow, the furnace top
flange meets the cased coil top flange. The coil flange fits
inside of the furnace flange. See Figure 17.
3. There are three holes in the furnace top flange which
can be used for pilot holes to connect and align the furnace
and coil. There are self drilling screws included which
can be used for this connection. Seal all gaps between the
furnace and coil.
UPFLOW MODEL IN
HORIZONTAL RIGHT AIRFLOW POSITION
Airflo
w
Co
mf
or
t
TM
co
il
CASED COIL
Co
mf
or
t
TM
co
il
Figure 16
CASED
COIL
UPFLOW
FURNACE
TOP COIL FLANGE
FITS INSIDE OF
FURNACE
TOP FLANGE FOR
HORIZONTAL RIGHT
APPLICATION
UPFLOW
Figure 17
Figure 14
Figure 15
Remove
and
Discard
Replace
CAUTION
!
Coil is pressurized with 10 to 20 psi nitrogen. Remove
the valve core on the pressure tap to release the pres-
sure before un-sweating the tubing caps. If no pressure
is released, check for leaks.
