Lennox Elite CBX32M-024 User manual

,B,2008 Lennox industries Inc,
Dallas, Texas, USA
X_ WARNING
_CAUTION
INSTALLATION
INSTRUCTIONS
Elite®Series CBX32M Units
MULTI-POSITION AIR HANDLER
505,342M
05108
Supersedes 04/08
_puTeCh ical
n
blications
Litho U.S.A.
IMPORTANT
_, IMPORTANT
CBX32M Up-flow/Down-flow Unit Dimensions .... 2
CBX32M Horizontal LH/RH Unit Dimensions ...... 3
General Information ........................... 4
Shipping and Packing List ...................... 4
Requirements ................................. 4
Installing the Unit .............................. 4
Brazing Connections ........................... 4
Installing the Condensate Drain ................. 8
Making Electrical Connections .................. 9
Sealing the Unit ............................... 12
Inspecting and Replacing Filters ................. 9
Adjusting the Blower Speed .................... 12
Repairing or Replacing Cabinet Insulation ......... 14
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
CHECK FOR AND REMOVE THE FOLLOWING ITEMS BEFORE OPERATING UNIT.
BLOWER MOTOR
SHIPPING BOLT
TOP CAP SHIPPING BRACKET (REPLACE
SCREWS IN TOP CAP AFTER REMOVAL)
CBLOWER MOTOR SHIPPING
BRACKET
D
REFRIGERANT LINE PLUGS [SEE
BRAZING CONNECTIONS ON PAGE 7]
F
BLOWER HOUSING SUPPORT PAD
B
HORIZONTAL DRAIN PAN (SEE UP-FLOW
APPLICATIONS ON PAGE 4 AND
DOWN-FLOWAPPLICATIONS ON PAGE 6)
E
iiiiiiiiiiiii_i':i-_
05/08
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
Page 1 505,342M
IIIIIIIIIIIIIIIIIIIIIIHIIIIIIIIIIIIIIIIIIIIIIII

CBX32M Model Dimensions (for Up-flow, Down-flow, LH and RH Horizontal Applications)
-018/-024 -030 -036 -042 -048/-060
Dimension inches mm inches mm inches mm inches mm inches mm
A 45-1/4 1149 49-1/4 1251 51 1295 52-1/2 1333 58-1/2 1486
B 16-1/4 413 21-1/4 540 21-1/4 540 21-1/4 540 21-1/4 540
C 20-5/8 524 20-5/8 524 22-5/8 575 22-5/8 575 24-5/8 625
D 14-3/4 375 19-3/4 502 19-3/4 502 19-3/4 502 19-3/4 502
E 19 483 19 483 21 533 21 533 23 584
F 15 381 20 508 20 508 20 508 20 508
G 24-5/8 625 24-5/8 625 26-3/8 670 27-7/8 708 27-7/8 708
H20-5/8 524 24-5/8 625 24-5/8 625 24-5/8 625 30-5/8 778
3/4
(19)
SUPPLY
AIR OPENING _
- 3/4
(19)
LINE VOLTAGE
INLETS (TOP
AND LEFT SIDE)
LOW VOLTAG E
INLETS (TOP AND RIGHT
SIDE)
Top View 5/8
(15)
OPTIONAL
ELECTRIC
HEAT
(FIELD-
INSTALLED)
/
RETURN AIR RETURN AIR |
L oc ss
F E "'"-_
5/8 5/8 1 5/8
(15) Front View (15) (25) Side View (15)
Up-flow Position
PIPING PLATE DETAIL
(FOR UP-FLOW AND DOWN-FLOW POSITIONS)
ilU i iiiii!i¸! ! i!i ii i i i i i iii i ii iiiiiiii ii!iiii i !i!i ! ! !!i! i i iiiiiiiii iiiiiiiiiiiii4_8/8(111,
iiiiiiiii_i_iiiiiiiii_ii_i!_iiiii_!i_!ii_!_!!i!i!!!_!!_i!iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii_!_i_I_i!_ii!i_i_i_!_i!i_i!_!iiii_!_!i_i_!_i_i!_i_i_ii_ii_!_!_i_i_ii_i_i_i_i_!_!i_!i_!i_i_i!!i!i_i_i!_i_ii_i_!_ii_ii_i!i_!iii_i__SUCT'°NL'NE
i ililil .CONDENSATEiii !i DRA,NS(2,
(HORIZONTAL)
DRAINS (2)
(UPFLOW AND
DOWNFLOW_
1-3/4 (44)
SUCTION
LINE
\
LINE
OPTIONAL
ELECTRIC
INSTALLED)
LOW VOLTAGE
(RIGHT SIDE)
LINE VOLTAGE
(LEFT SIDE)
5/8(15)
t
1 (25) FILTER
Top View ACCESS
A i,
H
11-1/16
A
V
5/8 5/8
Side View (15) (15) Front View
Down-flow Position
_KIT NUMBER 83M57 (LB-909844A) REQUIRED TO CONVERT
UNIT TO DOWN-FLOW APPLICATIONS.)
505342M 05/08
Page 2

5-3/8 2 FILTER
CONDENSATE
DRAINS (2)
(UPFLOW AND "_
DOWNFLOW)
CONDENSATE
DRAINS (2)
(HORIZONTAL)
PIPING PLATE
DETAIL 5-3/4 -3/ 1-1/2
44 (38)
5/8
(16)I
(16) (25)
(5/8)j End View
LOW VOLTAGE
INLETS (TOP
3/4 AND LEFT SIDE)
(19) 11H 16
o,
lll°°°
(19)- LINE VOLTAGE INLETS
(BOTTOM AND LEFT SIDE)
End View
C
LIQU{D _SUCTION OPTIONAL ELECTRIC
LINE LINE HEAT (FIELDqNSTALLED)
FOR DIMENSIONS "A" THROUGH
"H", SEE CHART ON PAGE 2.
Top View
(_68) 3/4
'N SlTOT 1,19
S,DE,
B D
LOWVOLTAGE:
INLETSBOTTOM_._1
AND RIGHT I_
SIDE) --(19)
FILTERACCESS Front View End View
Horizontal Position (Right-Hand Air Discharge)
OPTIONAL ELECTRIC FILTER SUCTION LIQUID
HEAT (FIELD INSTALLED) LINE LINE
Top View
4-3/8 t
(111)
PIPING PLATE t
DETAIL 1-1/8
(29) _-
SUCTION i
LIQUID
LINE
.FILTER
ACCESS
Blq/2
(38)
CONDENSATE DRAINS (2)
(HORIZONTAL) (44)-
Front View
Horizontal Position (Left-Hand Air Discharge)
1
(25)
5/8
End View
5/8
(16)
5/8
(18)
Page 3
CBX32M SERIES

,&,WARNING CBX32M units are factory-configured for up-flow or
horizontal right-hand discharge installation. For down-flow
or horizontal left-hand discharge, some field modification
is required. WARNING
IMPORTANT
The Lennox Elite* Series CBX32M air handler units are
designed for installation with a matched remote outdoor
unit that is charged with HFC-410A refrigerant and optional
field-installed electric heat, The air handler units are for
indoor installation only.
These instructions are intended as a general guide and do
not supersede local or national codes in any way. Consult
authorities having jurisdiction before installation. Check
equipment for shipping damage; if found, immediately
report damage to the last carrier.
Package 1 of 1 contains the following:
1--Assembled air handler unit
In addition to conforming to manufacturer's installation
instructions and local municipal building codes, installation
of Lennox air handler units (with or without optional electric
heat), shall conform with the following National Fire
Protection Association (NFPA) standards:
•NFPA No. 90A - Standard for Installation of Air
Conditioning and Ventilation Systems
• NFPA No. 90B - Standard for Installation dResidence
Type Warm Air Heating and Air Conditioning Systems
This unit is approved for installation clearance to
combustible material as stated on the unit rating plate,
Accessibility and service clearances must take
precedence over combustible material clearances.
DISASSEMBLE AND REASSEMBLE AIR HANDLER
UNIT
The CBX32M air handler unit consists of two sections
which are shipped assembled from the factory, If
necessary, the unit may be disassembled to facilitate
setting the unit, Follow the steps below:
To disassemble:
Step 1_ Remove access panels.
Step 2.. Remove both blower and coil assemblies. This
will lighten the cabinet for lifting,
Step 3.. Remove one screw from the left and right posts
inside the unit. Remove one screw from each
side on the back of the unit, Unit sections will
now separate,
To reassemble:
Step 1.. Align cabinet sections together,
Step 2,, Reinstall screws,
Step 3.. Replace blower and coil assemblies.
Step 4,, Replace access panel.
UP-FLOW APPLICATION
Use the following procedures to configure the unit for
up-flow operations:
Step 1.. Remove access panels. Remove corrugated
padding from the space between the blower and
coil assemblies.
Step 2.. The horizontal drain pan must be removed when
the coil blower is installed in the up-flow position,
Removing horizontal drain pain will allow proper
airflow and increase efficiency.
Step 3.. Place unit in desired location. Make sure that
unit is level, Connect return and supply air
plenums as required using sheet metal screws
as illustrated in figure 1,
Step 4.. Install units which have no return air plenum on
a mounting stand that is at least 14" from the
505342M 05/08
Page 4

floorfor properair return.Lennoxoffersan Step2_
optionalup-flowunitstandaslistedintable1.
HORIZONTAL DRAIN PAN
r q I(MUST BE REMOVED)
I;
II
UP-FLOW/ II
DOWN-FLOW _J
DRAIN PAN i
i
Figure 1. Upflow Configuration
Table 1. Optional Unit Side Stand (Up-Flow Only)
Model Kit Number
-21,-26, and -31 45K31
-41 through -65. 45K32
HORIZONTAL DRIP SHIELD
V
DRA,NPAN
HORIZONTAL I I I I
DRAIN PAN "_I__
NO ADJUSTMENT IS NECESSARY
Figure 2. Right-Hand Discharge Configuration
ANGLE IRON OR
SHEET METAL ELECTRICAL INLET
CLEARANCE 4 IN. (102 MM)
1/2 IN. q
SCREWS
MAX.
FRONT VIEW END VIEW
Figure 3. Suspending Horizontal Unit
HORIZONTAL RIGHT-HAND DISCHARGE
APPLICATION
Use the following procedures to configure the unit for
horizontal right-hand discharge operations:
NOTE -For horizontal applications, an secondary drain
pan is recommended, Refer to local codes,
Step 1.. Remove access panels. Remove corrugated
padding from the space between the blower and
coil assembly.
Step 3..
No further adjustment is necessary. Set unit so
that it is sloped 1/4 inch toward the drain pan end
of the unit as illustrate in figure 2 on page 5.
If the unit is to be suspended, it must be
supported along the entire length of the cabinet
as illustrated in figure 3. Ifa strap is used, attach
a piece of angle iron or sheet metal to the unit
(either above or below) so that the full length of
the cabinet is supported. Use securing screws
which are no longer than 1/2 inch to avoid
damaging the coil or filter, Connect the return
and supply air plenums as required using sheet
metal screws.
CAUTION
HORIZONTAL LEFT-HAND DISCHARGE
APPLICATION
Use the following procedures to configure the unit for
horizontal left-hand discharge operations:
NOTE -For horizontal applications, an secondary drain
pan is recommended. Refer to local codes.
Remove access panels. Remove corrugated padding from
the space between the blower and coil assembly before
operation.
Step 1.. Remove coil assembly from unit and remove the
horizontal drain pan as illustrated in figure 4,
detail A on page 6.
Step 2.. Remove drain plugs from back drain holes on
horizontal drain pan and reinstall them on front
holes.
AIMPORTANT
Step 3..
Step 4..
Step 5..
Rotate the drain pan 180° front to back and
install it on the opposite side of coil,
Remove screws from top cap. Remove
horizontal drip shield screw located in the center
of the back coil end seal as illustrated in figure 4,
details B and C on page 6.
Rotate horizontal drip shield 180° front to back.
Page 5
CBX32M SERIES

PLUGGED
END
OPENENDFOR
CONDENSATION
DRAIN COIL
\
COIL SHOWN IN UP-FLOW
POSITION FOR EASY
CONVERSION
DETAIL A
(DRAIN PAN)
ORIGINAL
PLUG
LOCATION
G
LOCATION
TOP CAP ROTATED TO
CORRECT POSITION
SUPPORT
t
TOP CAP
SCREWS DETAIL B
(TOP CAP)
DETAIL C
TOP _ _ _ ALIGN HOLES WITH
CAP HOLES IN COIL END
_'_o _ PLATE.
90 _ / _
BEND BACK COIL END SEAL
DRAIN PAN [
Figure 4. Left-Hand
Step 6_ Remove plastic plug from left hole on coil front
end seal and reinstall plug in back hole. Reinstall
horizontal drip shield screw in front coil end seal,
Drip shield should drain downward into
horizontal drain pan inside coil,
Step 7,. Rotate top cap 180° front to back and align with
unused screw holes. Holes must align with front
and back coil end plates. Note that top cap has
a 45° bend on one side and 90 ° bend on the
other. The 90 ° bend must be on the same side
as the horizontal drain pan as illustrated in figure
4 on page 6,
NOTE -Be very careful when you reinstall the screws into
coil end plate engaging holes. Misaligned screws may
damage the coil,
Step 8,, From the up-flow position, flip cabinet 90° to the
left and set into place, Replace blower assembly.
Secure coil in place by bending down tab on
cabinet support rail as illustrated in figure 5 on
page 6.
NOTE -For horizontal applications in high humidity
areas, seal around the exiting drain pipe, liquid line and
suction line to prevent infiltration of humid air,
Step 9,. Knock out drain seal plate from access door,
Secure plate to cabinet front flange with screw
provided,
Step 10,, Flip access door and replace it on the unit.
Step 11,. Set unit so that it is sloped 1/4 inch toward the
drain pan end of the unit, Connect return and
supply air plenums as required using sheet
metal screws,
Step 12,. If the unit is to be suspended, it must be
supported along the entire length of the cabinet
Discharge Modifications
as illustrated in figure 3 on page 5. If using a
chain or strap, attach a piece of angle iron or
sheet metal to the unit (either above or below the
unit), so that the full length of the cabinet is
supported. Use securing screws which are no
longer than 1/2 inch to avoid damaging the coil
or filter, Use sheet metal screws to connect the
return and supply air plenums,
SECURING TAB ON
CABINET SUPPORT RAIL
\HORIZONTAL DRIP SHIELD
_ HORIZONTALDRAIN PAN
Figure 5. Left-Hand Discharge Configuration
DOWN-FLOW APPLICATION
Use the following procedures to configure the unit for
down-flow operations:
WARNING
NOTE -If down-flow application is required, separately
order kit number 83M57 and install per kit's instructions,
Also, use metal or class I supply and return air plenums,
Page 6
505342M 05/08

PROPERLY-SIZEDi
FLOOR OPENING,,_
COMBUSTIBLE FLOOR
ADDITIVE BASE
Figure 6. Combustible Flooring Additive Base
On combustible flooring, use an additive base as
illustrated in figure 6. and use the following procedures:
WARNING
IMPORTANT
Jh 11-3/8
_1- (289) --I_
1-5/8(41)
T:
oox32 !i
CB30M-21/26
20 (508)
CBX32M-41 to -65
CB3OM-3_ t_65
_ i{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{;i;.............
_1-1-5/8 (41)
SUPPLY
AIR
OPENING
l inches
(mm)
18-1/4(464)
CBX32M-21/26
and 31
CB30M-21/26
23-1/4 (591)
CBX32M-41 to -65
B30M-31 to 65
221/8 562-,.i
5/8 (16) 1OPENING3-3/8(340) _ 1_
iI JI 2(51)
SIDE VIEW _i,
Figure 7. Downflow Combustible Base Dimensions
Step 1.. Cut an appropriately sized opening for
combustible base as illustrated figure 7.
Step 2.. Set the additive base into opening.
Step 3.. Connect supply air plenum to the additive base.
Step 4.. Set the unit on the additive base so flanges of the
unit drop into the base opening and seal against
the insulation strips. The unit is now locked in
place.
Step 5_ Install retum air plenum and secure with sheet
metal screws.
If the homeowner reports water dripping from supply air
diffusers, check the shields and tape. Make sure the tape is
completely attached to the edges of the drip shield, and
that the drip shield is wedged firmly in place.
All coils are equipped with a factory-installed, internally
mounted check/expansion valve, which is suitable for use
in applications as follows:
• valve suitable for HCFC-22 use (CBX32M unit)
• valve suitable for HFC-410A use (CB30M unit)
The CBX32M/CB30M air handler's coil line sizes are listed
in table 2. Use Lennox L15 (sweat) series line sets (refer to
the outdoor unit Engineering Handbook for proper size,
type and application). For field-fabricated refrigerant lines,
see the piping section of the Lennox Unit Information
Service Manual.
SUCTION LINE
LIQUID LINE
AIR HANDLER UNIT
Figure 8. Brazing Connections
NOTE -CBX32M series evaporators use nitrogen or dry
air as a holding charge. If there is no pressure when the
rubber plugs are removed, check the coil or line set for
leaks before installing. After installation, pull a vacuum
on the line set and coil before releasing the unit charge
into the system.
Page 7
CBX32M SERIES

NOTE -See outdoor unit instructions on how to flow
nitrogen through line sets.
Step 1_ Remove access panel,
Step 2,, Remove the refrigerant line caps from the
refrigerant lines,
Step 3,, Use a wet rag to protect TXV sensing bulb (or
remove it) when brazing suction line
connections,
Step 4..
Step 5..
Step 6_
Step 7_
Step 8..
Place a wet rag against piping plate and around
the suction line connection, The wet rag must be
in place to guard against damage to the paint,
With the wet rag in place, position a field
provided elbow fitting to the air handler's suction
line and line set, Start nitrogen flow before
brazing,
After the procedure is completed then remove
the wet rag,
Place wet rag against piping plate and around
the liquid line connection. Position liquid line
elbow to air handler's suction line and to line set.
Start nitrogen flow and begin brazing both
connections and after procedure is completed
then remove both wet rags,
Refer to instructions provided with outdoor unit
for leak testing, evacuating and charging
procedures,
Step 9_ Install access panel,
Table 2. Refrigerant Line Sets
CBX32M Liquid Vapor/ L10 L15
Units Line No. Suction Line Line Sets Line Sets
-018/024 3/8 in 5/8 in L10-26 L15-26
(Smm) (16 mm) 20 ft. - 50 ft. 20 ft. -50 fb
(6 m- 15 m) (6 m- 15 m)
-030,-036 3/8 in 3/4 in. L10-41 L15-41
(10 mm) (19mm 20 ft. - 50 ft. 20 ft. -50 ft.
(6m-15m) (6m-15m)
-042, -048 3/8 in 7/8 in. L10-65 L15-65
(10 mm) (22 mm) 30 ft. - 50 ft. 30 ft. -50 ft.
(9 m- 15 m) (9 m- 15 m)
-060 3/8 in 1-1/8 in. Field Field
(10 ram) (29 ram) Fabricated Fabricated
Before connecting drain line(s), check drain hole(s) to
verify that drain opening is fully open and free of any
debris. Also check to make sure that no debris has fallen
into the drain pan during installation that may plug up the
drain opening,
Connect main condensate drain and route downward to an
open drain or sump. Do not connect drain to a closed waste
system. Refer to figure 9 on page 8 for typical condensate
trap configuration.
It is recommended that the auxiliary drain be connected to
a drain line for all units. Ifauxiliary drain is not connected, it
must be plugged with provided cap. For down-flow units,
the auxiliary drain shall be connected and routed to a drain.
See figure 10 for auxiliary and main drain locations,
The following practices are recommended to ensure
condensate removal as illustrated in figures 9 and 10:
• Drain piping should not be smaller than the drain
connections at drain pan.
• A trap must be installed in the main drain line,
• The trap must be deep enough to offset the difference
in static pressure between drain pan and atmosphere.
Generally, two inches is satisfactory for medium static
applications.
• Horizontal runs must be sloped 1 inch per 10 feet of
drain line to offset friction,
• An open vent in drain line will sometimes be required due
to line length, friction and static pressure,
• Drain construction and routing should facilitate future
cleaning and must not interfere with filter access,
• Auxiliary drain should run to an area where
homeowner will notice any drainage. The auxiliary
drain line does not required venting or a trap. Refer to
local codes.
VENT MUST EXTEND ABOVE THE HEIGHT OF THE COIL"
DRAIN PAN BY 2 INCHES (51 MM). VENT
DRAIN PAN
TRAP MUST BE DEEP ENOUGH TO OFFSET
MAXIMUM STATIC DIFFERENCE (GENERAL
2 INCHES [51MM]).
TRAP (49P66)
DRAIN LINE SHOULD SLOPE A MINIMUM 1 INCH PER
10 FEET (25 MM PER 3 M) TO APPROVED DRAIN
Figure 9. Typical Condensate Drain Connection
LEF%HAND UP-FLOW OR RIGHT-HAND
DISCHARGE DOWN-FLOW DISCHARGE
w
AUXILIARY DRAIN ON LEFT
oo ]
MAIN DRAIN ON RIGHT
Figure 10. Drain Locations
505342M 05/08
Page 8

AIMPORTANT WARNING
Each unit includes a factory-installed filter. Note that filter
access door fits over access panel. Air leakage will occur if
access panel is placed over filter door.
Filters should be inspected monthly and must be cleaned
or replaced when dirty to assure proper furnace operation.
Reusable filters supplied with some units can be washed
with water and mild detergent. Some units are equipped
with standard throw-away type filters which should be
replaced when dirty.
To replace filter:
Step 1.. Loosen the thumbscrews holding the filter panel
in place.
Step 2.. Slide the filter out of the guides on either side of
cabinet.
Step 3.. Insert new filter.
Step 4.. Replace panel.
See table 3 for replacement filter sizes.
Table 3. Filter Dimension
UnitModel No. Filter Size Inches (mm)
CBX32M018/024 15 x20 (381 x 508)
CBX32M-030 20 x 20 (508 x 508)
CBX32M-036,042 20 x 22 (508 x 559)
CBX32M-048,060 20 x 24 (508 x 610)
L2 LI
1L
CIRCUIT 1
,ll
Wiring must conform to the current National Electric Code
ANSI/NFPA No. 70, or Canadian Electric Code Part I, CSA
Standard C22.1, and local building codes. Refer to
following wiring diagrams. See unit nameplate for
minimum circuit ampacity and maximum overcurrent
protection size.
HEAT ELEMENT _I
CIRCUIT BREAK-
ERS OR TERMI-
NAL BLOCK
Select the proper supply circuit conductors in
accordance with tables 310-16 and 310-17 in the
National Electric Code, ANSI/NFPA No. 70 or tables 1
through 4 in the Canadian Electric Code, Part l, CSA
Standard C22.1.
This unit isprovided with knockouts for conduit. Refer to
figure 15 for unit schematic wiring diagram. Refer to
figures 14 through 13 for typical field wiring.
Separate openings have been provided for 24V low
voltage and line voltage. Refer to the dimension illustration
for specific location.
K3 INDOOR
BLOWER RELAY
TRANSFORMER
K32 CB1
HEAT_RELAY ,I CIRCUIT _}
BREAKER
OR
GROUND FUSE ±
,/_ THERMOSTAT TB, L._ (D_ __
TERMINALI0
. I j I I
rj IL_ I " I
L-- __1
I r -J
/kvv
NOTE - USE COPPER CONDUCTORS ONLY.
REFER TO UNIT RATING PLATE FOR MINIMUM
CIRCUIT AMPAClTY AND MAXIMUM OVERCUR-
RENT PROTECTION SIZE
LINE VOLTAGE FIELD INSTALLED
CLASS 2 VOLTAGE FIELD INSTALLED
NEC/CEC
NOTE - ALL REMAINING WIRES ARE FACTORY
INSTALLED
z_TO EXTERNAL LOAD 24VAC AT .50 AMP MAXI-
MUM.
Z_ THERMOSTAT HEAT ANTICIPATION SETTING 0.4
AMP ELECTRIC HEAT
Z_ WHEN TWO-STAGE THERMOSTAT IS USED,
CONNECT SECOND STAGE HEAT BULB TO TER-
MINAL "W2" AND REMOVE JUMPER BETWEEN
TERMINALS "R" AND 'W2."
/2X FACTORY INSTALLED JUMPERS
Z_ L3 CONNECTION USED ON (Y-VOLTAGE)
3-PHASE ELECTRIC HEATERS ONLY,
Figure 11. Typical Field Wiring - Cooling Application with Electric Heat
Page 9
CBX32M SERIES

LI
L2
CIRCUIT 1
%
%
@A
CIRCUIT BREAK-
ERS OR TERMI-
NAL BLOCK
LINE VOLTAGE FIELD INSTALLED
CLASS 2 VOLTAGE FIELD INSTALLED NEC/CEC
NOTE - ALL REMAINING WIRES ARE FACTORY INSTALLED
L_ TO EXTERNAL LOAD 24VAC AT .50 AMP MAXIMUM
/_ FACTORY INSTALLED JUMPERS
/_ Y2 USED ONLY WHEN TWO SPEED COMPRESSOR IS USED (HP21).
L_ USING SERVICE LIGHT OPTION (S54)WITH SOME ELECTRONIC
THERMOSTATS MAY REQUIRE MOVING $54 COMMON WIRE TO Y1
IN HEAT PUMP UNIT.
/_ COMMON USED ONLY ON SOME THERMOSTATS.
L_ AMBIENT COMPENSATING THERMISTOR CONNECTION USED ONLY
ON SOME THERMOSTATS. S I
THERMOSTAT ,/_
99J
_1 I I I
I I I II I
I
I-4=-IS I
II ,
DFaDD []
K5 INDOOR
BLOWER RELAY
TRANSFORMER
CB1 O
CIRCUIT
BREAKER
GROUND ORFUSE
TERMINAL
BLOCK _
!
I
[
HEAT PUMP CLASS 2
VOLTAGE TERMINALS
Figure 12. Typical Field Wiring -Heat Pump Only Application
LI
L2,_I I
CIR-
CUIT 1
HEAT ELEMENT _I
CIRCUIT
BREAKERS
ILINE VOLTAGE FIELD
INSTALLED
-- -- -- CLASS 2 VOLTAGE FIELD
INSTALLED NEC/CEC
NOTE - ALL REMAINING WIRES
ARE FACTORY INSTALLED
THERMOSTAT HEAT ANTICIPATION
L_ SETTING 0.4 AMP ELECTRIC HEAT
_ FACTORY INSTALLED JUMPERS
AWHEN OUTDOOR THERMOSTAT IS
USED, CONNECT LEADS TO
TERMINALS "R" AND "W2" AND
REMOVE JUMPER BETWEEN
TERMINALS "R' AND "W2."
/_ EMERGENCY HEAT RELAY (USED
ONLY IF OUTDOOR T'STAT IS
USED) FIELD PROVIDED AND
INSTALLED NEW INDOOR UNIT.
24VAC 5VA MAX NEC/CEC CLASS 2
K3 INDOOR
BLOWER RELAY
TRANSFORMER
OR TERMI- AT K52
BLOC -IIEK RELAY '_I CB1
NAL
CIRCUIT
BREAKER
GROUND ORFUSE
TEl
vTERM INAL Z_
BLOCK
,r",hI ,rlL L:
,I[
I
EM
r
4 4
q +
I __1
J
OUTDOOR
THERMOSTAT
I(IF USED)
I
I
I
If___l
L
I I I
S% D
8 _
o 8
@
/_ USING SERVICE LIGHT OPTION ($54) WITH SOME ELECTRONIC
THERMOSTATS MAY REQUIRE MOVING $54 COMMON WIRE TO Y1 IN
HEAT PUMP UNIT.
/_ COMMON USED ONLY ON SOME THERMOSTATS.
L_Y2 USED ONLY WHEN TWO-SPEED COMPRESSOR IS USED (HP21)
/_ AMBIENT COMPENSATING THERMISTOR CONNECTION USED ONLY ON
SOME THERMOSTATS. HEAT PUMP CLASS 2
VOLTAGE TERMINALS
G
0d
w
O
,&
m
Figure 13. Typical Field Wiring - Heat Pump Application with Electric Heat
505342M 05/08
Page 10

L2 LI
CIRCUIT 1
,ll
K3 INDOOR
BLOWER RELAY
_LI (Black)
L2 (Orange)
FIELD-SUP-
PLIED
WIRE NUTS
GROUND
THERMOSTAT
j I L
r- L
Ir
wax
TRANSFORMER
CB1 0
CIRCUIT
BREAKER
OR
FUSE
TBI I
[ _I TERMINAL
IBLOCK I
J
J
NOTE - USE COPPER CONDUCTORS ONLY.
REFER TO UNIT RATING PLATE FOR MINIMUM
CIRCUIT AMPAClTY AND MAXIMUM OVERCUR-
RENT PROTECTION SIZE
LINE VOLTAGE FIELD INSTALLED
CLASS 2 VOLTAGE FIELD INSTALLED
NEC/CEC
NOTE - ALL REMAINING WIRES ARE FACTORY
INSTALLED
A'X TO EXTERNAL LOAD 24VAC AT .50 AMP MAXIMUM.
Z_ FACTORY INSTALLED JUMPERS
Figure 14. Typical Field Wiring - Cooling Only Application
BLL
2€v POWER R
T
F _ EC0N
__ j BLUER 6
CBSERIgS
I DESCRIPTION
JKEY 1 COMPONEN_
18_ IMOTOR -I_10_R
_ _IHIJIJII I_N_A_,H-INANb H
F FUSff2TIRANSFORMER
J2 ACK=ELECTRIC HEAT
_0_R
-RELAY-ECONOM I ZER HEAT
ITBI ITERI_, STRIP-CLAD5 II
EC8 S[RIEg
I D_?qR{PTIQN
KEY 1_OMP_)NgNT
CBE IClRCOlr BREAkER-ELECT, HT
_CB2 IClRCUIT BREAKER-ELECT. HT
_Cg5 leIRCUIT BREA_(ER-£LEeT. HT
IT_ ITERM[NAL STRIP-UNIT
MOTOR SPEED TAP CHART
2¢V COMMON C
FIELD WIRING FOR ECB
SERIES UNITS WITHOUT
CIRCUIT BREAKERS
CIRCUIT i Z_
Z_ _EOUIPMEN_
GROUND
/3 CBB USED ON 0¢8 AN_ O6,0 UNIT5 ONLY
--LINE VOLTAGE FIELD WIRING
-- --CLASS IT VOLTAGE FIELD WIRING
ZZ_ REFER TO FACTORY BLOV#ER SPEED TAP SELECTION
CHART ON UNIT FOR BLOVAER SPEED INFORMATION,
L_NEC/OEC CLASS 2 3VA
/_ USE COPPER CONDUCTORS ONLY.
REFER TO UNIT RATING PLATE FORMINIMt_
CIRCUIT AMPACITY AND _AXIMUM OVERCURRENT
PROTECTION SIZE
z_ L3 CONNECT{ON USED ON (Y) ELECTRIC R[ATER_ ONLy
AEQUIPMENT OROUND LOCATED IN INDOOR UNIT
Z_ CONNECT PO_VER WIRES FROM HEATER LABELED LI,L2,0N
"p* VOLTAGE UNITS AND LI,LZ,L3 ON "y" VOLTAGE
UNITS TO TO2 TERMINAL STRIP IN INDOOR UNIT.
z_ L_ IS NOT PRESENT ON (P) ELECTRIC HEATERS
Z_ THE NU_RO_CIRCUITS VARY ACCORDING
TO HEATER WOOEL REFER TO FAN COIL
NAMEPLATE FOR ACTUAL NU_ER EMPLOYED
FIELD WIRING FOR ECB SERIES
UNITS WITH CIRCUIT BREAKERS
CIRCUIT 3 CIRCUIT 2 CIRCUIT A
EOU]PMENT T GROUND
.....t EoU'P"E°Too,P E.,
GROUND
Figure 15. Typical Wiring Diagram - Single Phase
Page 11
CBX32M SERIES

Seal the unit so that warm air is not allowed into the
cabinet. Warm air introduces moisture, which results in
water blow-off problems. This is especially important when
the unit is installed in an unconditioned area,
Make sure the liquid line and suction line entry points are
sealed with either the provided flexible elastomeric thermal
insulation, or field provided material (e.g. Armaflex,
Permagum or equivalent). Any of the previously mention
materials may be used to seal around the main and
auxiliary drains, and around open areas of electrical inlets.
MINIMUM BLOWER SPEEDS (WITH ELECTRIC
HEATERS)
For the minimum allowable speed for the CBX32M series
units with electric heat, refer to the ECB29 installation
instructions. Table 4.
AIR VOLUME ADJUSTMENT
Blower speed selection is accomplished by changing the
taps at the harness connector at the Blower motor as
illustrated in figure 16. Refer to unit wiring diagram in figure
15 on page 11. Refer to tables 4 through 9 for air handler
)erformance data,
HARNESS
CONNECTOR
F
PRESS THE TAB TO RELEASE WIRE CONNECTOR.
SELECT CONNECTOR LOCATION FOR NEW SPEED.
INSERT WIRE UNTIL IT CLICKS.
Figure 16. Blower Speed Tap Selection
CBX32M-018/024 Air Handler Pe_ormance (208/230V)
Air Volume and Motor Watts at Specific Blower Taps
Low Medium
L/s Wat_ cfm L/s Wat_ cfm
330 245 895 425 300 1030
330 245 890 420 295 1015
325 240 875 415 290 1000
320 235 860 405 285 980
315 230 845 400 280 960
310 220 825 390 275 935
300 215 800 380 265 910
280 205 745 355 250 850
255 190 685 320 235 780
220 175 605 285 220 705
185 165 520 245 200 615
165 155 475 225 195 565
unit with air fil_r in place. Ele_ric hea_ have no app_ciable air
Table 5. CBX32M-030 Air Handler Performance (208/230V)
Air Volume and Motor Wat_ at Specific Blower Taps
Low Medium
L/s Wat_ cfm L/s Wat_ cfm
490 315 1175 555 335 1290
505 310 1190 560 330 1295
515 300 1190 560 325 1290
510 295 1175 555 320 1265
505 285 1145 540 310 1230
485 270 1105 520 295 1180
460 255 1045 495 280 1115
390 220 890 420 250 945
290 190 675 320 215 720
155 160 405 190 185 440
unit with airfil_rin place. Electric hea_ have no app_ciable air
External Static
Pressure High
in. w.g. Pa cfm L/s Wat_
.00 0 700 485 365
.05 10 695 480 360
.10 25 690 470 355
.15 35 680 465 345
.20 50 665 455 340
.25 60 650 440 335
.30 75 635 430 325
.40 100 590 400 310
.50 125 535 370 295
.60 150 470 330 280
.70 175 395 290 265
.75 185 350 265 255
NOTE - All air dab is measu_d external _sis_nce.
External Static
Pressure High
in. w.g. Pa cfm L/s Wat_
.00 0 1045 610 385
.05 10 1075 610 380
.10 25 1085 610 375
.15 35 1085 600 370
.20 50 1065 580 360
.25 60 1030 555 350
.30 75 980 525 335
.40 100 830 445 305
.50 125 615 340 275
.60 150 335 205 240
NOTE- Allairda_ is measu_d external _sis_nce.
505342M 05/08
Page 12

External Static
Pressure
in. w.g. Pa
.00 0
.05 10
.10 25
.15 35
.20 50
.25 60
.30 75
.40 100
.50 125
.60 150
.70 175
.75 185
Table 6. CBX32M-036 Air Handler Performance (208/230V)
cfm
915
965
1005
1035
1055
1060
1050
1005
915
775
59O
485
Low
L/s
430
455
475
490
495
5OO
495
475
430
365
280
230
Air Volume and Motor Watts at Specific Blower
Medium
Watts cfm L/s Watts
335 1120 530 390
330 1150 540 385
315 1170 550 380
235 1180 560 285
230 1190 560 280
220 1185 560 275
215 1175 555 375
290 1135 535 325
255 1060 500 300
230 960 455 280
205 830 390 255
195 750 355 245
Taps
cfm
1525
1520
1510
1495
1475
1450
1415
1335
1230
1100
95O
870
High
L/s
72O
72O
715
7O5
895
685
67O
83O
58O
52O
450
410
Watts
5O5
495
480
470
455
440
430
400
375
345
320
305
NOTE - All air data is measured extemal to unit with air filter in place. Electric heaters have no appreciable air resistance.
External Static
Pressure
in.w.g. Pa
100 0
105 10
.10 25
.15 35
.20 50
.25 60
.30 75
.40 100
.50 125
.60 150
.70 175
.75 185
NOTE
Table 7. CBX32M-042 Air Handler Performance (208/230V)
Air Volume and Motor Watts at Specific Blower Taps
Low Medium High
cfm L/s Watts cfm L/s Watts cfm L/s Watts
1325 625 370 1600 755 455 1825 860 565
1335 630 370 1585 750 455 1790 845 555
1335 630 370 1565 740 450 1750 825 540
1330 630 365 1540 725 440 1710 805 530
1320 620 360 1505 710 435 1660 785 520
1300 615 355 1470 695 425 1610 760 505
1270 600 350 1425 675 415 1555 735 495
1195 565 330 1320 625 390 1430 675 465
1090 515 310 1195 565 365 1290 610 440
955 450 285 1050 495 335 1135 535 415
795 375 260 875 415 310 965 455 385
700 330 250 780 370 295 875 415 370
- All air data is measu_d ex_mal _ unit with air filer in place. Ele_dc he_e_ have no app_ciable air _sistance.
Table 8. CBX32M-048 Air Handler Performance (208/230V)
External Static Air Volume and Motor Watts at Specific Blower Taps
Pressure Low Medium High
in. w.g. Pa cfm L/s Watts cfm L/s Watts cfm L/s Watts
.00 0 1475 695 430 1785 845 520 1910 900 590
.05 10 1480 700 430 1770 835 515 1895 895 585
.10 25 1475 695 425 1750 825 510 1870 880 580
.15 35 1465 690 420 1720 810 500 1840 865 570
.20 50 1445 680 410 1685 795 490 1800 850 565
.25 60 1415 670 405 1645 775 480 1755 830 550
.30 75 1380 650 395 1600 755 465 1700 805 540
.40 100 1290 610 370 1485 700 440 1580 745 515
.50 125 1170 550 345 1350 635 410 1425 675 485
.60 150 1020 480 320 1190 560 380 1250 590 450
.70 175 840 395 295 1000 470 350 1045 495 415
.75 185 740 350 280 900 425 335 930 440 400
NOTE- Allairdata is measu_d ex_mal _ unit with airfil_rin place. Electnc heate_ have no app_ciable air _sistance.
Page 13
CBX32M SERIES

Table 9 CBX32M-060 Air Handler Performance (208/230V)
External Static Air Volume and Motor Wat_ at Specific Blower Taps
Pressure Low Medium High
in w g Pa cfm L/s Wat_ cfm L/s Wat_ cfm L/s Wat_
.00 0 1775 835 585 2025 955 670 2115 995 780
.05 10 1775 835 590 2010 950 665 2100 990 770
.10 25 1770 835 580 1995 940 655 2085 985 765
.15 35 1760 830 570 1975 930 645 2060 970 750
.20 50 1745 825 560 1950 920 635 2030 960 740
.25 60 1725 815 550 1915 905 625 2000 945 730
.30 75 1695 800 535 1880 885 610 1960 925 715
.40 100 1630 770 505 1795 845 580 1870 880 685
.50 125 1540 725 475 1690 795 545 1755 830 655
.60 150 1425 675 440 1560 735 515 1620 765 625
.70 175 1295 610 410 1415 670 480 1465 690 590
.80 200 1140 535 375 1250 590 445 1290 610 560
.85 210 1050 495 360 1160 550 425 1195 565 545
NOTE- Allairda_ is measu_d external _ unit with airfil_rin place. EleGric hea_ have no app_ciable air _sis_nce.
_IMPORTANT
Matt- or foil-faced insulation is installed in indoor
equipment to provide a barrier between outside air
conditions (surrounding ambient temperature and
humidity) and the varying conditions inside the unit. If the
insulation barrier is damaged (wet, ripped, torn or
separated from the cabinet walls), the surrounding
ambient air will affect the inside surface temperature of the
cabinet. The temperature/humidity difference between the
inside and outside of the cabinet can cause condensation
on the inside or outside of the cabinet which leads to sheet
metal corrosion and subsequently, component failure.
REPAIRING DAMAGED INSULATION
Areas of condensation on the cabinet surface are an
indication that the insulation is in need of repair.
If the insulation in need of repair is otherwise in good
condition, the insulation should be cut in an X pattern,
peeled open, glued with an appropriate all-purpose glue
and placed back against the cabinet surface, being careful
to not overly compress the insulation so the insulation can
retain its original thickness. If such repair is not possible,
replace the insulation. If using foil-faced insulation, any
cut, tear, or separations in the insulation surface must be
taped with a similar foil-faced tape.
Figure 17 Repairing Insulation
ILWARNING
505342M 05/08
Page 14