Lennox Elite CBX32M-024, Elite CBX32M-030, Elite CBX32M-018, Elite CBX32M-036, Elite CBX32M-042 Installation Instructions Manual

INSTALLATION

,B,2008 Lennox industries Inc,

Dallas, Texas, USA

X_ WARNING

_ CAUTION

IMPORTANT

INSTRUCTIONS

Elite® Series CBX32M Units

MULTI-POSITION AIR HANDLER
505,342M

05108
Supersedes 04/08

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

_puTeCh ical

n

blications

Litho U.S.A.

_, IMPORTANT

RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE

BLOWER MOTOR

SHIPPING BOLT

TOP CAP SHIPPING BRACKET (REPLACE

SCREWS IN TOP CAP AFTER REMOVAL)

C

Making Electrical Connections .................. 9

Sealing the Unit ............................... 12

Inspecting and Replacing Filters ................. 9

Adjusting the Blower Speed .................... 12

Repairing or Replacing Cabinet Insulation ......... 14

CHECK FOR AND REMOVE THE FOLLOWING ITEMS BEFORE OPERATING UNIT.

BLOWER HOUSING SUPPORT PAD

B

BLOWER MOTOR SHIPPING

BRACKET

D

HORIZONTAL DRAIN PAN (SEE UP-FLOW

APPLICATIONS ON PAGE 4 AND

DOWN-FLOWAPPLICATIONS ON PAGE 6)

iiiiiiiiiiiii_i':i-_

REFRIGERANT LINE PLUGS [SEE

BRAZING CONNECTIONS ON PAGE 7]

F

05/08

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

Page 1

E

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

H 20-5/8 524 24-5/8 625 24-5/8 625 24-5/8 625 30-5/8 778

3/4

(19)

SUPPLY

AIR OPENING _

(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 iiiiiiiiiiiii 4_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

- 3/4
(19)

LINE VOLTAGE
INLETS (TOP
AND LEFT SIDE)

Top View 5/8

RETURN AIR RETURN AIR |

L oc ss

5/8 5/8 1 5/8

(15) Front View (15) (25) Side View (15)

F E "'"-_

LOW VOLTAG E
INLETS (TOP AND RIGHT

SIDE)

(15)

OPTIONAL

ELECTRIC

(FIELD-

INSTALLED)

HEAT

Up-flow Position

i ililil .CONDENSATEiii !i DRA,NS(2,

PIPING PLATE DETAIL

1-3/4 (44)

SUCTION

LINE

LINE

OPTIONAL

ELECTRIC

INSTALLED)

LOW VOLTAGE

(RIGHT SIDE)

LINE VOLTAGE

(LEFT SIDE)

/

5/8(15)

(HORIZONTAL)

DRAINS (2)
(UPFLOW AND

DOWNFLOW_

1 (25)

\

11-1/16

Side View (15) (15) Front View

_KIT NUMBER 83M57 (LB-909844A) REQUIRED TO CONVERT

5/8 5/8

Down-flow Position

UNIT TO DOWN-FLOW APPLICATIONS.)

t

FILTER

Top View ACCESS

A i,

H

A

V

505342M 05/08

Page 2

CONDENSATE

DRAINS (2)

(UPFLOW AND "_

DOWNFLOW)

CONDENSATE

DRAINS (2)

(HORIZONTAL)

PIPING PLATE

DETAIL

5-3/8 2 FILTER

5-3/4 -3/ 1-1/2

44 (38)

5/8

(16)I

(16) (25)

(5/8)j End View

Horizontal Position (Right-Hand Air Discharge)

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

S,DE,

'N SlTOT 1,19

B D

LOWVOLTAGE:

INLETSBOTTOM_._1

AND RIGHT I_

FILTERACCESS Front View End View

PIPING PLATE t

DETAIL 1-1/8

SIDE) --(19)

4-3/8 t

(111)

(29) _-

3/4 AND LEFT SIDE)

(19) 11H 16

o,

lll°°°

(19)-

LINE VOLTAGE INLETS

(BOTTOM AND LEFT SIDE)

End View

LOW VOLTAGE

INLETS (TOP

OPTIONAL ELECTRIC FILTER SUCTION LIQUID
HEAT (FIELD INSTALLED) LINE LINE

B

CONDENSATE DRAINS (2)

(HORIZONTAL) (44)-

Top View

Front View

.FILTER

ACCESS

lq/2

(38)

Horizontal Position (Left-Hand Air Discharge)

SUCTION i

LIQUID

LINE

1

(25)

End View

5/8

5/8

(16)

5/8

(18)

Page 3

CBX32M SERIES

,&,WARNING

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 d Residence
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.

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

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

DRAIN PAN

DOWN-FLOW _J

Table 1. Optional Unit Side Stand (Up-Flow Only)

Model Kit Number

-21,-26, and -31 45K31

-41 through -65. 45K32

i
i

Figure 1. Upflow Configuration

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 DRIP SHIELD

V

HORIZONTAL I I I I

DRAIN PAN "_I__

DRA,NPAN

NO ADJUSTMENT IS NECESSARY

Figure 2. Right-Hand Discharge Configuration

ANGLE IRON OR

SHEET METAL

SCREWS

MAX.

1/2 IN. q

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.

ELECTRICAL INLET

CLEARANCE 4 IN. (102 MM)

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.

A IMPORTANT

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

TOP CAP ROTATED TO
CORRECT POSITION

SUPPORT

TOP CAP
SCREWS

DETAIL B

(TOP CAP)

\

TOP _ _ _ ALIGN HOLES WITH

CAP HOLES IN COIL END

_'_o _ PLATE.

BEND BACK COIL END SEAL

90 _ / _

DRAIN PAN [

LOCATION

G

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

505342M 05/08

t

DETAIL C

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

\

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

HORIZONTAL DRIP SHIELD

_ HORIZONTALDRAIN PAN

COMBUSTIBLE FLOOR
ADDITIVE BASE

PROPERLY-SIZEDi

FLOOR OPENING,,_

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

1-5/8(41)

T:

oox32 !i

CB30M-21/26

20 (508)

CBX32M-41 to -65

CB3OM-3_ t_65

5/8 (16) 1OPENING3-3/8(340) _ 1_

_1- (289) --I_

_ i{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{;i;.............

_1-1-5/8 (41)

SUPPLY

AIR

OPENING

221/8 562 -,.i

(mm)

l inches

18-1/4(464)
CBX32M-21/26
and 31

CB30M-21/26

23-1/4 (591)
CBX32M-41 to -65

B30M-31 to 65

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.

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.

AIR HANDLER UNIT

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.

SUCTION LINE

LIQUID LINE

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..

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,

Step 5..

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,

Step 6_

After the procedure is completed then remove
the wet rag,

Step 7_

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,

Step 8..

Refer to instructions provided with outdoor unit
for leak testing, evacuating and charging

procedures,

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 indrain 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.

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,

VENT MUST EXTEND ABOVE THE HEIGHT OF THE COIL"
DRAIN PAN BY 2 INCHES (51 MM). VENT

TRAP MUST BE DEEP ENOUGH TO OFFSET
MAXIMUM STATIC DIFFERENCE (GENERAL

2 INCHES [51MM]).

DRAIN LINE SHOULD SLOPE A MINIMUM 1 INCH PER

10 FEET (25 MM PER 3 M) TO APPROVED DRAIN

DRAIN PAN

TRAP (49P66)

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

A IMPORTANT

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

Step 3.. Insert new filter.
Step 4.. Replace panel.

See table 3 for replacement filter sizes.

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

cabinet.

Table 3. Filter Dimension

K3 INDOOR
BLOWER RELAY

HEAT ELEMENT _I

1L

CIRCUIT 1

CIRCUIT BREAK-

ERS OR TERMI-

NAL BLOCK

GROUND FUSE

,ll

,/_ THERMOSTAT TB, L._ (D_ __

K32 CB1

HEAT_RELAY ,I CIRCUIT _}

TERMINALI0

. I j I I

rj I L_ I " I

L-- __1

I r -J

/kvv

TRANSFORMER

BREAKER

OR

WARNING

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.

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 is provided 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.

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

K5 INDOOR
BLOWER RELAY

%
%

@A

CIRCUIT BREAK-

ERS OR TERMI-

NAL BLOCK

CIRCUIT

BREAKER

GROUND ORFUSE

CB1 O

TERMINAL

BLOCK _

!

TRANSFORMER

HEAT PUMP CLASS 2

VOLTAGE TERMINALS

LINE VOLTAGE FIELD INSTALLED

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

CLASS 2 VOLTAGE FIELD INSTALLED NEC/CEC

THERMOSTAT ,/_

99J

_1 I I I

I I I II I

I

II ,

[

I

I-4=-IS I

DFaDD []

LI
L2,_I I

CIR-
CUIT 1

CIRCUIT

HEAT ELEMENT _I

BREAKERS

OR TERMI- AT K52

BLOC -IIEK RELAY '_I CB1

NAL

GROUND ORFUSE

v TERM INAL Z_

I LINE VOLTAGE FIELD

-- -- -- CLASS 2 VOLTAGE FIELD

L_ SETTING 0.4 AMP ELECTRIC HEAT

_ FACTORY INSTALLED JUMPERS

A

/_ EMERGENCY HEAT RELAY (USED

INSTALLED

INSTALLED NEC/CEC

NOTE -ALL REMAINING WIRES

ARE FACTORY INSTALLED

THERMOSTAT HEAT ANTICIPATION

WHEN OUTDOOR THERMOSTAT IS

USED, CONNECT LEADS TO
TERMINALS "R" AND "W2" AND

REMOVE JUMPER BETWEEN
TERMINALS "R' AND "W2."

ONLY IF OUTDOOR T'STAT IS
USED) FIELD PROVIDED AND

INSTALLED NEW INDOOR UNIT.
24VAC 5VA MAX NEC/CEC CLASS 2

Figure 12. Typical Field Wiring - Heat Pump Only Application

K3 INDOOR
BLOWER RELAY

EM

TRANSFORMER

TEl

BREAKER

CIRCUIT

OUTDOOR
THERMOSTAT

I(IF USED)

I
I

I

BLOCK

,r",hI ,rlL L:

,

I[
I

/_ 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.

I f___l

r

4 4
q +

I __1

J

S% D

8 _

HEAT PUMP CLASS 2

VOLTAGE TERMINALS

L

I I I

o 8

@

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

CIRCUIT

BREAKER

CB1 0

OR

FUSE

TRANSFORMER

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

j I L

r- L

Ir

wax

[ _I TERMINAL

I BLOCK I

TBI I

J

J

Figure 14. Typical Field Wiring - Cooling Only Application

2€v POWER R

T

F _ EC0N

BLL

__ 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

KEY 1 _OMP_)NgNT

I D_?qR{PTIQN

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_

/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

A

EQUIPMENT 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

Figure 15. Typical Wiring Diagram - Single Phase

Z_ _EOUIPMEN_

GROUND

Page 11

.....t EoU'P"E°T oo,P E.,

EOU]PMENT T GROUND

GROUND

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,

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,

Make sure the liquid line and suction line entry points are
sealed with either the provided flexible elastomeric thermal

HARNESS

CONNECTOR

insulation, or field provided material (e.g. Armaflex,
Permagum or equivalent). Any of the previously mention

F

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.

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.

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

PRESS THE TAB TO RELEASE WIRE CONNECTOR.

SELECT CONNECTOR LOCATION FOR NEW SPEED.

INSERT WIRE UNTIL IT CLICKS.

Figure 16. Blower Speed Tap Selection

505342M 05/08

Page 12

Table 6. CBX32M-036 Air Handler Performance (208/230V)

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

cfm
915

965
1005
1035
1055
1060

1050
1005

915

775

59O

485

NOTE - All air data is measured

Low

L/s

430
455

475
490
495
5OO

495
475
430
365

280
230

extemal to unit with air filter in place. Electric heaters have no appreciable air resistance.

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

Table 7. CBX32M-042 Air Handler Performance (208/230V)

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

- All air data is measu_d ex_mal _ unit with air filer in place. Ele_dc he_e_ have no app_ciable air _sistance.

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

Low Medium High

Air Volume and Motor Watts at Specific Blower Taps

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.

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

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 airwill 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