LENNOX Air Handler (indoor Blower&evap) Manual L0805326

User Manual: LENNOX LENNOX Air Handler (indoor blower&evap) Manual LENNOX Air Handler (indoor blower&evap) Owner's Manual, LENNOX Air Handler (indoor blower&evap) installation guides

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_2006 Lennox Industries Inc.
Dallas, Texas, USA
BLOWER COIL
KITS AND ACCESSORIES
Tech n[cal
bHcations
Litho U.S.A.
504,947M
10/06
Supersedes 04/05
DOWNFLOW INSTALLATION
KIT
INSTALLATION INSTRUCTIONS FOR DOWNFLOW KIT (83M57)
USED WITH CB27UH, CBX27UH, CB29M, CB30M, & CBX32M UNITS
Package 1 of 1contains the following:
3-Pairs of coil support rails (left and right)
2 - Filter support racks
5 - Pairs of downflow drip shields
1 - Bag assembly which contains:
8 - 4-3/4" X 2" lengths of foam tape
2 - 20" X 1" lengths of foam tape
AkWARNING
Downflow installation kit (83M57) is used when CB27UH,
CBX27UH, CB29M, CB30M, or CBX32M blower coil is
installed in a downflow application. See figure 1 for kit com-
ponents.
RACKS
Figure 1. Kit Components
ACAUTION
1. Remove the access panels. Remove the corrugated
padding between the blower and coil assemblies,
2. Remove the coil assembly from the unit,
3. Remove the horizontal drain pan from the blower coil
unit (see figure 2),
4. Rotate cabinet 180° from the upright position (see fig-
ure 2). It may be necessary to remove the blower as-
sembly to lighten the cabinet for lifting,
r q
II
mJ
II
Upflow/
Downflow _,_
Drain Pan
i_ Horizontal Drain Pan
(Remove and discard)
Figure 2. Downflow Discharge Position
10/06
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IIIIIIIIIIIIIIIHIIIIIIIIIIIIIIIIIIHIIIIIHIIIIII
5. Remove the door support from the unit and set aside
for re-installation (see figure 3).
6. Three pairs (left and right) of coil support rails are pro-
vided. Use the information given in table 1 to select the
proper rails for the application. Position and install a
coil support rail on each side of the cabinet. The rail
should be installed level with the door support which
was removed (see figure 3).
Table 1. Coil Support Rail Usage
Unit Model Number
CB27UH-018, -024
CBX27U H-018, -024
CB29M-21/26, -31, -41, -46
CB30M-21126, -31
CBX32M-018/024, -030
CB27UH-030, -036
CBX27UH-030, -036
CB29M-51, -65
CB30M-41, -46
CBX32M-036, -042
CB27UH-042, -048, -060
CBX27UH-042, -048, -060
CB30M-51, -65
CBX32M-048, -060
Rail Length
20-7/16"
22- 7/16"
24- 7/16"
7. Loosen the existing screw on each side of the back of
the cabinet. Slide the rear coil support rail slot over the
screw and tighten the screw securely (see figure 4).
8. Use the existing screws to secure the front of the coil
support rails and the existing door support (see figure
5).
9. Use tables 2 and 3 to select the properly sized drip
shields for the unit. Drip shields divert condensate to
drain pan when blower coil is installed in the downflow
position.
NOTE -Downflow drip shields are not required for use
with CB29M-21/26, CB30M-21/26, and
CBX32M-Of 8/024 units.
Table 2. Downflow Drip Shields: No Tape Req'd
Unit Part No. Length Width
CB29M-31, -41 LB-88658 15.75 2.9187
CB27UH-018, -024
CBX27UH-018, -024 LB-88658 15.75 2.9187
CB30M-31
CBX32M-030
CB27UH-030, -036
CBX27UH-030, -036 LB-88663 17.75 3.9187
CB30M-41, -46
CBX32M-036, -042
CB27UH-042, -048, -060
CBX27UH-042,-048, -060 LB-88664 19.75 3.9187
CB30M-51, -65
CBX32M-048, -060
Table 3. Downflow Drip Shields: Tape Required
Unit Part No. Length Width
CB29M-46 LB-74274 15.875 4.6718
CB29M-51, -65 LB-74272 17.875 4.6718
POSITION AND INSTALL COIL SUPPORT
RAILS ALONG THE SIDE OF THE CABINET
LEVEL WITH DOOR SUPPORT
Remove and set aside
Figure 3. Coil Support Rail Location
LOOSEN EXISTII G SCREW AT BACK OF
CABINET SLIDE SLOTTED EDGE OF RAIL
OVER SCREW AND TIGHTEN SECURELY.
Figure 4. Secure Back of Coil Support Rail
USE EXISTING SCREWS TO INSTALL
COIL SUPPORT RAIL AND EXISTING
DOOR SUPPORT
Figure 5. Secure Front of Coil Support Rail
Page 2
NOTE -WHEN REQUIRED, apply pre-cut foam tape as
described in steps 10 and11. The foam tape creates a seal
between the drip shield and both the coil and the drain pan
so that water will not be allowed into the air stream.
10. Apply two pieces of foam tape (provided) down both
ends of each shield. The tape should measure 4-3/4"
X 2" (120 X 25 mm), Ensure that the tape covers both
sides of the shield equally (see figure 6).
11. Apply the longer piece of foam tape on one side be-
tween the pieces on each end. This piece of tape is 1"
wide and should be trimmed to fit (see figure 7).
SIDE
VIEW
Figure 6
12. From the underside of the coil, install the downfiow drip
shield. Make sure that the shield is firmly in place, It
may be necessary to apply light force to position the
shields into the bottom of the drain pan (see figure 8).
NOTE -Drip shields should fit snugly against both the
coil and drain pan. Insulating tape may be required
along the full length of the bottom of shields used with
CB27UH, CBX27UH, CB3OM, CBX32M and smaller
CB29M units to ensure a good seal (see figure 8).
13. Slide the coil assembly and the blower back into the
cabinet, if they were removed. Replace the coil access
panel.
14. Install the appropriate rear filter support rack between
the filter rails (see figure 9). Use 14-1/2" support rack
for 16-1/4" cabinet and 19-1/2" rack for 21-1/4" cabi-
net, Slide the filter between the filter rails as shown.
15. Make sure that the unit is level. Use sheet metal
screws to connect the return and supply air plenums,
as required,
Figure 7
CB27UH,CBX27UH, Units without Foam
CB29M, CB30M or CBX32M Tape (See Table 2)
Shield
Coil
Drain Pan
CB29M-46, -51, -65
• NOTE - Drip shield must fit
snugly against both the coil and
drain pan. It may be necessary
to apply insulating tape along
__ the full length of the bottom
edge of each shield in order to
ensure a seal against the coil.
Units with Foam
Tape (See Table 3)
Coil Drip Shield
Drain Pan
XkWARNING Figure 8. Downflow Drip Shields
NOTE -In downflow applications, use only metal or
class I supply and return air plenums.
16. Replace blower access panel.
17. Install the unit according to the unit installation instruc-
tions.
Page 3
Figure 9. Filter Support Rack Installation

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