Trane A4MXA1824AC6HA, Руководство по установке

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18-AD37D1-1-EN 3
Installer’s Guide
F. 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.
d. On A4MXC4260 and A4MXD4260, installing the water
diverter baffles is required for downflow conversion.
Install the two outer water baffles closest to the drain pan
using the provided 5/16" hex head screws. See Figure 5.
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.
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.
Figure 4
Attach Downflow
Bottom Gasket
Start
here
Figure 5