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Installer's Guide
C. RECOMMENDATION
If a coil is part of the total system installation, use the Installer's
Guide packaged with the furnaces, outdoor sections, and
thermostat for physically installing those components.
IMPORTANT:
If installing the coil in the horizontal position, you MUST
use the horizontal kit listed below for this coil model
number and follow the instructions in the installation
guide provided with the conversion kit.
Model Number
4PXCBU36BS3HAC
4PXCBD36BS3HDC
4PXCDU60BS3HAC
4PXCDD60BS3HDC
D. FURNACE IN UPFLOW POSITION
APPLICATION USES UPFLOW COIL MODEL ONLY
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.
1.
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
ductwork to the coil case using field supplied screws.
See Figure 2.
c. Secure the coil case to the furnace and seal for air
leaks as required.
E. FURNACE IN DOWNFLOW POSITION
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.
2
Horizontal Kit No.
BAYCONV23B
BAYCONV30C
SELF TAPPING SCREWS (4)
1-1/2" MAXIMUM
FIELD SUPPLIED
FOR UPFLOW /
HORIZONTAL LEFT
INSTALLATIONS
SCREWS
(BOTH SIDES)
Figure 2
1.
DOWNFLOW COIL CONVERSION
On 4PXCDD60BS and 4PXCDU60BS, installing the water
diverter baffles is required for water management in downflow
installations. Install the two outer water baffles closest to the
drain pan using the provided 5/16" hex screws. See Figure 3.
2.
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.
3.
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 forming 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
Attach Downflow
Bottom Gasket
Figure 4
WATER DIVERTER (X2)
Start
here
18-AD43D1-1C-EN
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