© Trane 2018
18-AD35D1-2D-EN
Installer’s Guide
C. RECOMMENDATION
If a coil is part of the total system installation, use the In-
staller’s Guide packaged with the furnaces, outdoor sections,
and thermostat for physically installing those components.
CAUTION
!
Caution: This coil is pressurized with 8-12 psig of dry air.
Do not stand directly in front of the coil connections when
removing sealing plugs. If no pressure is released, check
for leaks.
D. FURNACE IN UPFLOW POSITION
1. UPFLOW COIL CONVERSION: While not required,
optional removal of some coil components will maximize
airflow efficiency.
a. Remove the coil by sliding the coil out of the coil
enclosure.
b. Optional but recommended: Remove the factory in-
stalled two-piece baffle assembly from the top of the coil
by removing the 5/16” hex head screws. See Figure 2.
Replace only the top baffle using the same screws previ-
ously provided.
c. Optional but recommended: On 4TXCC009DS and
4TXCD010DS only, remove the (2) outer water diverter
baffles by removing the 5/16” hex head screws. See Figure 5.
d. Optional for maximum efficiency: Remove the horizon-
tal drain pan from the coil and discard.
2. UPFLOW GAS FURNACE
a. Apply gasket material (duct seal field supplied) to ALL
mating surfaces between the furnace and the coil case.
b. Set the coil case on top of the furnace. Connect the duct-
work to the coil case using field supplied screws.
c. Secure the coil case to the furnace and seal for air leaks
as required.
FOR UPFLOW /
HORIZONTAL LEFT
INSTALLATIONS
E. FURNACE IN DOWNFLOW POSITION
1. DOWNFLOW COIL CONVERSION: While not required,
optional removal of some coil components will maximize
airflow efficiency.
a. Remove the coil by sliding the coil out of the coil enclo-
sure.
b. Optional but recommended: Remove the factory in-
stalled two-piece baffle assembly from the top of the coil
by removing the 5/16” hex head screws. See Figure 2.
Replace only the top baffle using the same screws previ-
ously provided.
c. Optional for maximum efficiency: Remove the
horizontal drain pan from the coil and discard.
2. DOWNFLOW GASKET INSTALLATION (OPTIONAL):
For unusually humid applications that expect prolonged
operation above 70% RH, it is recommended to use the
BAYGSKT001A0 gasket kit to prevent water from form-
ing on the bottom of the drain pan and dripping into the
supply ductwork.
a. Lay the coil on its back side.
b. Locate the 4" wide gasket material found in
BAYGSKT001A0.
c. Attach the 4" gasket material to three sides of the
bottom of the drain pan as shown. Make sure to start
by matching up the edge of the gasket material to the
inner edge of the drain pan by the coil fins and working
outwards.
d. The gasket material can be cut or ripped easily so
that it can be tailored to fit. The gasket material must
cover the three sides along the entire length of the coil as
shown in Figure 4.
Figure 3
Figure 2
Remove
and
Discard
Replace
UPFLO
W
FURNA
CE
CASED
COIL
SCREWS
(BOTH SIDES)
STANDOFFS
(BOTH SIDES)
STANDOFFS (4)
DRILL SCREWS (4)
Figure 4
Attach Downflow
Bottom Gasket
Start
here
3. DOWNFLOW GAS FURNACE
When a coil is used with a downflow furnace, a subbase is not
required between the coil case and combustible flooring.
a. Place the coil case on the furnace supply air plenum.
b. Secure the coil case to the plenum.
c. Set the furnace on top of the coil case, making sure that
the back side of the discharge opening is snug up against the
duct flange at the top rear of the coil case.
d. Secure the coil case to the furnace and seal for air leaks as
required.
