LENNOX Air Handler (indoor Blower&evap) Manual L0805327

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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zav
,B,2007

Lennox
Da{las,

IndustrIes

Ins.

Texas,

USA

INSTALLATION
INSTRUCTIONS
Elite® Series CB30U Units

X_ WARNING

AIR HANDLER
505,340M
07/07
Supersedes 504,720M

F[_

Technical

J_LL Publications

Litho U.S.A.

_, CAUTION
CB30U Up-flow Unit Dimensions

................

CB30U Up-flow Side Return Air Filter Adapter

IMPORTANT

_, IMPORTANT

2
.....

General Information ............................

3

Shipping and Packing List ......................

3

Requirements .................................

3

Installing the Unit ..............................

3

Brazing Connections ...........................

4

Installing the Condensate Drain ..................

5

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

5

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

6

Adjusting the Blower Speed

....................

6

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

8

Repairing or Replacing Cabinet Insulation .........
RETAIN

THESE

CHECK

INSTRUCTIONS

FOR AND REMOVE

FOR FUTURE

THE FOLLOWING

2

ITEMS BEFORE

REFERENCE

OPERATING

BLOWER MOTOR
SHIPPING BOLT

BLOWER

HOUSING

12

SUPPORT

PAD

UNIT.

@..

B

BLOWER

MOTOR SHIPPING
BRACKET

D

REFRIGERANT
LINE CAPS [SEE BRAZING
CONNECTION
ON PAGE 4]

TOP CAP SHIPPING BRACKET (REPLACE
SCREWS IN TOP CAP AFTER REMOVAL)

E

C

07/07

IIIHIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

Page1

505,340M

IIIIIIIIIIIIIIIIIIIIIIIIIIIIII

t

5/8

DETAIL OF PIPING PLATE
3/4

t(19)
3/4

3/4

(19)_

_1_)
OPTIONAL
ELECTRIC
HEAT
(Field
InstaBed)

LINE
(Top

VOLTAGE
INLETS
and Left Side)

A

LOW

VOLTAGE
INLETS
(Top and
Right Side)

K

I
I

TOP VIEW

LIQUID
LINE

SUCTION
LINE

JL__J
5/8

(16)

F

5/8

Return Air

(16)

Bottom

JL_

FILTER
ACCESS

(215)

BottEom
Return

FRONT VIEW
Model

CB30U-21/26

CB30U-41/46

CB30U-31

CB30U-51 / CB30U-65

No.

inch

mm

inch

mm

inch

mm

inch

mm

A

45-1/4

1149

49-1/4

1251

52-1/2

1334

58-1/2

1486

B

16-1/4

413

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

24-5/8

625

D

14-3/4

375

19-3/4

502

19-3/4

502

19-3/4

502

E

19

483

19

483

21

533

23

584

F

15

351

20

508

2O

508

20

508

G

...............

27-7/8

708

H

...............

J

14-1/4

362

K

1-1/8

29

L

7-1/8

181

M

6-1/4

159

N

6-5/8

168

P

4-1/8

105

1-3/16
(30)

18-1/4

3/4

ii
i
i

3,,
(,9,
1

2-1/8

54

3-1/8

79

9-5/8

244

9-5/8

244

6-1/2

165

6-1/2

165

9-1/8

232

9-1/8

323

4-9/16

116

4-9/16

116

1-1/8

29
244

6-1/2

165

9-1/8

232

4-9/16

116

_iiiiiiiiiiiii'i;!ii_!;i;
i

- Air

VIEW

flow

CB30U-21/26
Model
Number

CB3OU-31 , CB30U-41/46
CB30U-51 and CB30U-65

B

may

14

356

ii_I:I:I:I:_!_!_!_!_!_!_!:_i_!i_i_i_i!i_i_:iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii:!_:_iii:iI_;!!_!I;_i_
i ii_iiiii!iiiiiiiiiii!!i_ii

AIR FILTERS
be either

direction.

I_ (25)

SIDE VIEW

Page 2
07/07

464

9-5/8

_:_NiN;i!N_;i!iiiili;iiii!ilililililill
|!:!:!:;!i!i!_!:!i!ili!iiii_i!!

(FURNISHED)

FRONT

778

18-1/4

18-1/4

i ii ii ii ii ii ii ii ii iiiiii!;!ii!;'ii]i
Inch
mm
Inch
mm
iiiiiiiiiiii i"':ii!i!i!!i!iiiiiiiiiiiiiiiii!i!iiiiiiiiiiii!!ii!i!ii'iiil
i ;! :!: i i i;!i !:A ! i i 16ii i : i ii406iiiii i i i20iiii iiii iiiiiiiiiiiiiiiiiii
508

(25) '_

*NOTE

30-5/8
464

464

20
(508)

(19)

505340M

Air

SIDE VIEW

18

457

WARNING

I

WARNING

CB30U units come from the factory ready for up-flow,
bottom return installation. This unit is not designed for
down-flow or horizontal discharge. Return air for the
CB30U may be either from the bottom or sides of the unit.
Side return air applications
require
some field
modifications.

IMPORTANT

DISASSEMBLE/REASSEMBLE
The CB30U series air handler units are designed for
installation with optional field-installed electric heat and a
matched remote outdoor unit. These units are for indoor
installation only. The CB30U units are designed for up-flow
operations with either bottom or side return air
applications.
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

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
up-flow operations:

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), MUST conform with the following National Fire
Protection Association (NFPA) standards:
•
•

AIR HANDLER UNITS

The air handler units consists of two factory-assembled
sections. It may be necessary to disassemble the sections
when positioning the unit for installation,
To disassemble:

NFPA No. 90A - Standard for Installation of Air
Conditioning and Ventilation Systems

to configure the unit for

Step 1,

Remove access panels and corrugated padding
between the blower and coil assembly before
operation,

Step 2.

Place unit in desired location. Set unit so that it
is level. Connect return and supply air plenums
as required using sheet metal screws.

Step 3,

Mount units that have no return air plenum on a
stand at least 14" from the floor for proper air
return, Lennox offers an optional up-flow unit
stand as listed in table 1.

NFPA No. 90B - Standard for Installation of Residence
Type Warm Air Heating and Air Conditioning Systems

This unit is approved for installation clearances to
combustible materials as listed on the unit rating plate which
is located on the unit. Accessibility and service clearances
must take precedence
over combustible
material
clearances.

Table 1. Optional
Model

Unit Side Stand (Up-Flow Only)
Kit Number

-21, -26, and -31

45K31

41 through-65

45K32

Page 3
CB30U/CBX27UH

SERIES

SIDE RETURN AIR APPLICATIONS
The CB30U unit is shipped from the factory ready for
bottom return air application. You can order an optional
side return air filter kit as listed in table 2.
Table 2. Optional

Side Return Air Filter Kit

Model

Kit Number

-21 and-26

65K23

All other models

65K24

All CB30U coils are equipped with a factory-installed,
internally mounted expansion valve. Use Lennox L15
(sweat) series line sets as shown in table 2 or use
field-fabricated refrigerant lines, L10 (flare) line sets may
be used by cutting off flare nut. Refer to the piping section
of the Lennox Unit Information Service Manual for proper
size, type, and application of field-fabricated lines.

_WARNING

Use the following procedures to configure the unit for side
return air operations:
Step 1,

Remove the coil access panel,

Step 2,

Remove the coil assembly from the cabinet,

Step 3.

Cut the side or sides of the cabinet used for
return air according to the dimensions given in
figure 1 and table 1. For -41, 46, -51 and -65
units, it is recommended that return air come into
the unit from both sides. Therefore, both sides of
the cabinet should be cut for these units,

Step 4.

Set the unit so that it is level. Seal the bottom
opening of the cabinet,

Step 5.

Connect the return and supply air plenums as
required.

I
SUCTION

AIR HANDLER

UNIT

LINE

LIQUID

LINE

Figure 2. Brazing Connections

Ak IMPORTANT

B

Table 4. Refrigerant Line Sets
CUT BOTH SIDES OF CABINET

FOR -41/46,

-51 AND -65 UNITS.

CB30MV
UNIT

LIQUID
LINE

VAPOR/
SUCTION
LINE

-21/26

3/8 in
(10 mm)

5/8 in.
(16 mm)

-31 -41/16

3/8 in
(10 mm)

3/4 in,
(19 mm)

3/8 in

7/8 in.

(10 mm)
3/8 in
(10 ram)

Figure 1. CB3OU Side Return Air Dimensions

Table 3. Side Return Air Dimensions
CB3OU

CB30U

CB30U

CB30U-51

-21/26

-31

-41/46

CB30U-65

inch (mm)

inch (mm)

inch (mm)

inch (mm)

A

14-1/4 (362)

18-1/4 (464)

18-1/4
(464)

18-1/4 (464)

B

1-1/8 (29)

1-1/8 (29)

2-1/8 (54)

3-1/8 (79)

Model #

-51

-65

Page 4
505340M

07/07

L10
LINE SETS

L15
LINE SETS

L10-26

L15-26

20 ft, - 50 ft,
(6m- 15m)

20 ft. - 50 ft.
(6m-15m)

L10-41

L15-41

20 ft, - 50 ft.
(6 m - 15 m)

20 ft. - 50 ft.
(6 m- 15 m)

(22 mm)

L10-65
30 if, - 50 ft,
(9 m - 15 m)

L15-65
30 ft. - 50 ft.
(9 m- 15 m)

1-1/8 in,
(29 ram)

FIELD
FABRICATED

FIELD
FABRICATED

NOTE - CB3OMV 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.
NOTE: See outdoor unit instructions on how to flow
nitrogen through line sets.
Step 1.

Remove access panel,

Step 2,

Remove the refrigerant
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 field provided
elbow fitting to 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,

line caps from the

Step 8,

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

Step 9.

Install access panel,

Connect the main condensate drain and route it downward
to an open drain or sump. Do not connect the drain to a
closed waste system. Refer to figure 3 for a typical
condensate trap configuration. If the auxiliary drain is not
connected, it must be plugged,
MINIMUM 1 INCH (25 MM)
PITCH PER 10 FEET (3048 MM)
OF LINE

_t

•

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 the drain line will sometimes be required
due to line length, friction, and static pressure,
Drains should be constructed in a manner to facilitate

•

future cleaning and should not interfere with filter
access as illustrated in figure 3,
•

Auxiliary drain should run to an area where the
homeowner will notice it draining, Refer to local codes,

A IMPORTANT

You can duct mount or install filters in the cabinet, The unit
is not equipped with a filter from the factory. Note that the
filter access door fits over the access panel. Air leaks will
occur if the access panel is placed over the filter door.
Filters should be inspected monthly and must be cleaned
or replaced when they dirty to assure proper furnace
operation,
Reusable filters can be washed with water and mild
detergent, When dry, they should be sprayed with filter
handicoater prior to reinstallation. Filter handicoater is RP
Products coating #418 and is available as Lennox part
number P-8-5069. Replace throw-away type filters when
they are dirty; they cannot be cleaned.
The filter section built into the unit may be used with bottom
return air applications,
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.

PIPE DIAMETER
_.

DIFFERENCE

....

CO,L

RAIN PAN

See table 5 for replacement filter sizes.
Table 5. Filter Dimensi, >ns

TRAP MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC
DIFFERENCE
(GENERALLY, 2 INCHES [51 MM] MINIMUM).

UNIT MODEL

Figure 3. Typical Condensate
The following practices
condensate removal:
•
•

Drain

are recommended

NO.

A trap must be installed in the main drain line,

RETURN

FILTER SIZE

SIDE RETURN
FILTER SIZE

Inches (mm)

Inches (mm)

CB30U-21/26

15 x 20 (381 x508)

16 x 20 (406 x 508)

CB30U-31

20 x 20 (508 x 508)

20 x 20 (508 x 508)

CB30U-41/46

20 x 22 (508 x 559)

20 x 20 (508 x 508)

CB30U-51,-65

20 x 24 (508 x 610)

20 x 20 (508 x 508)

to ensure

The drain piping should not be smaller than the drain
connections at drain pan,

BOTTOM

Page 5
CB30U/CBX27UH

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
Select the Blower speed by changing the taps at the
harness connector at the blower motor as illustrated in
figure 4. For selecting the blower speed and see figure 9 on
page 11 for the unit wiring diagram. Refer to the tables 6
through 10 for blower performance data.

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.

HARNESS
CONNECTOR

MINIMUM BLOWER SPEEDS (WITH ELECTRIC
HEATERS)

Press the tab to release
wire connector, select
connector location for

For the minimum allowable speed for the CB30U series
units with electric heat, refer to the ECB29/ECB31
installation instructions.

new speed. Insert wire
untilit clicks.
Figure 4. Blower Speed Tap Selection

Table 6. CB30U-21/26 Air Handler Performance (208/230v)
Air Volume and Motor Watts at Specific Blower Taps
Medium
Low
High

External Static
Pressure
in. w.g.

Pa

cfm

L/s

Watts

cfm

L/s

Watts

cfm

L/s

Watts

.00

o

1035

49O

390

85O

4OO

3o5

670

315

230

.05

lO

1020

48O

385

840

395

3oo

665

315

230

.10

25

1005

475

380

830

395

295

660

310

225

.15

35

985

465

375

820

385

29o

650

305

225

,20

50

965

455

370

8O5

380

285

640

300

220

.25

6o

940

445

365

790

37O

28o

625

295

220

.30

75

920

435

360

770

365

275

610

290

215

.40

lOO

865

410

345

725

340

265

575

270

210

.50

125

8O5

380

330

670

315

25o

535

250

200

.60

15o

735

345

320

610

285

24o

485

230

190

.70

175

655

310

3o5

535

255

225

430

200

180

.75

185

615

29O

295

5OO

235

215

395

190

175

NOTE - All air data is measured external to the unit with air filter in place with bottom return air or side return a_ (with both sides
open). Electric heaters have no appreciable air resistance.
Table 7. CB30U-31 Air Handler Performance (208/230v)
External Static
Pressure

Air Volume and Motor Watts at Specific Blower Taps
Medium
Low

in. w.g.

Pa

cfm

High
L/s

Watts

cfm

L/s

Watts

cfm

L/s

Watts

.00

o

1255

59O

35o

1190

560

315

1045

495

265

.05

lO

1245

59O

35o

1190

560

315

1050

495

265

.10

25

1230

58O

345

1175

555

31o

1040

490

255

.15

35

1205

57O

340

1155

545

300

1025

485

250

.20

5o

1170

55O

330

1120

530

290

1005

475

245

.25

6o

1125

53O

320

1080

510

285

970

460

235

.30

75

1065

5O5

315

1030

485

275

930

440

225

.40

lOO

925

435

295

895

425

255

820

385

205

.50

125

740

350

28o

725

340

240

670

315

185

.60

15o

520

245

26o

510

240

220

490

230

165

.70

175

255

120

240

260

120

2o0

275

130

145

.75

185

110

5O

23o

115

55

19o

150

70

135

NOTE - For side return air applications (with both sides open) add:. 10 in. wc. (25 Pa) static capacity to unit performance. Electric heaters
have no appreciable air resistance. Aft air data is measured external to the unit with the air filter in place with bottom return air.

Page 6
505340M

07/07

Table 8. CB3OU-41/46 Air Handler Performance (208/230v)
Air Volume and Motor Watts at Specific Blower Taps
Medium
Low
High

External Static
Pressure

in. w.g.

Pa

cfm

L/s

Watts

cfm

L/s

Watts

cfm

L/s

Watts

.00

o

1610

76o

510

1510

710

470

1360

645

430

.05

lO

1590

750

500

1490

705

460

1355

640

425

.10

25

1560

735

490

1465

690

450

1345

635

415

.15

35

1530

72o

480

1440

680

435

1330

625

405

.20

5o

1490

705

470

1405

665

425

1305

615

395

.25

6o

1450

685

455

1370

645

410

1280

605

380

.30

75

1405

665

445

1330

630

400

1245

585

370

.40

lOO

1305

615

415

1235

585

370

1160

545

340

.50

125

1185

560

390

1125

530

345

1050

495

310

.60

15o

1050

495

360

995

470

315

920

435

280

.70

175

895

420

330

845

400

285

765

360

245

.75

185

815

385

320

765

360

270

680

320

230

NOTE - For side return a_ applications (with both sides open) add:. 15 in. w._ (35 Pa) static capacity to un# performance. Electric heaters
have no appredable a_ resistance. Aft a_ data _ measured external to the un# with the a_ filter in place with boffom return a_
Table 9. CB3OU-51
External

Static

Air Handler

Air Volume

Pressure

Performance

and Motor

High

in.w.g.
.00
.05

(208/230v)

Watts

at Specific

Blower

Taps

Medium

Low

Pa
0
10

cfm
1805
1780

L/s
855
840

Watts
600
585

cfm
1615
1605

L/s
765
755

Watts
525
515

cfm
1355
1355

L/s
640
640

Watts
445
445

.10
.15
.20

25
35
50

1745
1710
1670

825
805
790

570
560
545

1585
1560
1535

750
735
725

505
490
480

1355
1350
1335

640
635
630

440
425
415

.25
.30
.40

60
75
100

1625
1575
1470

765
745
695

530
515
485

1500
1465
1375

710
690
650

465
450
420

1320
1295
1230

620
610
580

400
390
360

.50
.60

125
150

1350
1215

635
570

460
430

1265
1140

595
535

395
365

1145
1035

540
490

335
310

.70
.75

175
185

1060
980

500
460

400
385

990
910

470
430

335
320

905
830

425
390

285
270

NOTE - For side return a_ applications (with both sides open) add:. 15 in. w._ (35 Pa) static capacity to un# performance. Electric heaters
have no appredable a_ resistance. Aft a_ data _ measured external to the un# with the a_ filter in place with bosom return a_
Table 10. CB30U-65
External Static
Pressure
in.w.g.
.00

Air Handler

Air Volume

Performance

and Motor Watts

High

(208/230v)
at Specific

Blower

Medium

Taps
Low

Pa
0

cfm
2040

L/s
965

Watts
750

cfm
1900

L/s
895

Watts
665

cfm
1690

L/s
800

Watts
585

05
10

10
25

2005
1970

945
930

735
725

1875
1845

885
870

650
635

1680
1660

790
785

570
555

15
20
25

35
50
60

1935
1890
1845

910
890
870

710
695
680

1815
1780
1740

855
840
820

615
600
585

1640
1615
1585

775
760
745

545
530
515

30
40
50

75
100
125

1800
1690
1575

850
800
745

665
635
605

1700
1605
1495

800
755
705

570
540
510

1550
1470
1375

730
695
650

500
470
440

60
70
80

150
175
200

1445
1305
1150

680
615
545

575
540
510

1375
1240
1095

650
585
515

475
445
415

1265
1140
1000

600
540
470

410
380
350

85

210

1070

505

490

1015

480

400

920

435

330

NOTE - For side return a_ applications (with both sides open) add:. 15 in. w._ (35 Pa) static capacity to un# performance. Electric heaters
have no appredablea_resistance.
Aft a_data_measured
extemaltothe
un#withthe a_ filterinplacewithbo#omretum
a_

Page 7
CB30U/CBX27UH

SERIES

I

Select the proper supply circuit conductors according to
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 I, CSA Standard C22,1.

WARNING

This unit is provided with knockouts for conduit. Refer to
figure 9 on page 11 for unit schematic wiring diagram
and figures 5, 6, 7 and 8 for typical field wiring.
Separate openings have been provided for 24V low
voltage and line voltage. Refer to the dimension illustration
of specific location.

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
the following wiring diagrams. See the unit nameplate for
minimum circuit ampacity and maximum overcurrent
)rotection size.
L2 LI

BLOWER RELAY

_LI
_LZ
CIRCUIT

(Black)
K3 INDOOR

NOTE-USE COPPER
CONDUCTORSONLY,

I __

(Orange)
REFER TO UNIT RATINO PLATE
FOR MINIMUM CIRCUIT AMPACITY
AND MAXIMUM OVERCURRENT
PROTECTION SIZE

#m---L3
FIELD-SUPPLIED
WIRE NUTS

TRANSFORMER

BREAKER OR
CB1 FUSE
CIRCUIT

GROUND

_

,II-THERMOSTAT

_1 I
Ir
If

J

L

I

J

TBI
TERMINAL
BLOCK

--J

CLASS 2 VOLTAGE FIELD INSTALLED
NEC/CEC
NOTE-ALL REMAINING WIRES
FACTORY INSTALLED

I
Z_

--J

Page 8

Only

VOLTAGE FIELD

INSTALLED

TO EXTERNAL LOAD 24VAC
AT .50 AMP MAXIMUM

/_FACTORY

Figure 5. Cooling

07/07

LINE

....
I

z_

505340M

--

INSTALLED JUMPERS

L2

LI

LL

NOTE-USE COPPER
CONDUCTORS ONLY,

K 3 INDOOR
BLOWER RELAY
HEAT

BREAKERS

ELEMENT

REFER TO UNIT RATING PLATE
FOR MINIMUM CIRCUIT AMPACITY
AND MAXIMUM OVERCURRENT
PROTECTION SIZE

_1

f %_€'*_

_'_ERMINAL

CIRCUN

1

i_

NOTE-ALL REMAINING WIRES
FACTORY INSTALLED

O_}
BR ........
OR

TRANSFORMER

HEAT

RELAY

_I
FUSE

Z_

GROUND

TO EXTERNAL LOAD 24VAC
AT .50 AMP MAXIMUM

Z_THERMOSTAT
HEAT ANTICIPATION
SETTING .€ AMP (ELECTRIC HEAT)
Z_

I-.,

r.i

/-_

IL-

LINE VOLTAGE FIELD INSTALLED
CLASS 2 VOLTAGE FIELD INSTALLED
NEC/GEC

....

K32

_

TERMINALI

'L_,

I
__i__ __ .j

L

WHEN TWO STAGE THERMOSTAT
CONNECT SECOND STAGE HEAT
TERMINAL "W2," AND REMOVE
BETWEEN TERMINALS "R" AND

O

Ir

I
I

_FACTORY

INSTALLED

L3 CONNECTION
HEATERS ONLY.

J

IS USED,
BULB TO
JUMPER
"W2."

JUMPERS

USED ON (Y VOLTAGE)

THREE

PHASE

ELECTRIC

Figure 6. Cooling Only and with Electric Heating Applications
L2

LI

IL

K 3 INDOOR
BLOWER
RELAY

CIRCUIT BREAKERS
OR TERMINAL BLOCK

CIRCUI"

---D
[]

TRANSFORMER

BREAKER OR
CB1 FUSE
CIRCUIT
GROUND

,,I----

CLASS 2
NEC/CEC
NOTE-ALL

TBI
TERMINAL

VOLIADE FIELD
REMAINING

INSIALLEO

"h

WIRES FACTORY INSTALLE

IJ
TO EXTERNAL LOAD 24VAC AT
.50 AMP MAXIMUM
FACTORY
/_

INSTALLED

PRESSOR

COM-

IS USED (HP21).

USING

SERVICE

LIGHT OPTION

SOME

ELECTRONIC

QUIRE

MOVING

($54) WITH

THERMOSTATS

S54 COMMON

I

I
J

[__.11
I
II
I
II
I
II
I
II

JUMPERS

Y2 USED ONLY WHEN TWO SPEED

I

J

MAY RE-

s, Z_
THERMOSTAT

fILl

L_

II

F
_

WIRE TO Y1 IN

uJI

LI

HEAT PUMP UNIT
/_
Z_

COMMON

USED

ONLY ON SOME THERMOSTATS.

AMBIENT COMPENSATING
ON SOME THERMOSTATS.

THERMISTOR

CONNECTION

USED ONLY

HEAT PUMP CLASS
VOLTAGE
TERMINALS

2

Figure 7. Heat Pump Only

Page 9
CB30U/CBX27UH

SERIES

L2

LI

[L

HEAT PUMP APPLICATION
WITH ELECTRIC HEAT

K3 INDOOR
BLOWER RELAY
HEAT

ELEMENT

#I

CIRCUIT
CIRCUIT BREAKERS OR
TERMINAL BLOCK

fuse

c_

K32
HEAT

RELAY

TRANSFORMER

'I

CLASS 2 VOLTAGE FIELD
NEC/CEC

INSTALLED

NOTE-ALL REMAINING WIRES FACTORY INSTALLED

GROUND

FUSE

,,I

_TBI

//_
TERMINAL

/_

THERMOSTAT HEAT ANTICIPATION
AMP ELECTRIC HEAT

//_

BLOCK

FACTORY

INSTALLED

SETTING

0.4

JUMPERS

_=_

I
I

I
I

J

SI
THERMOSTAT

EM _I2E2AT RELAY_

Z_

,Z_(_

$23
OUTDOOR
THERMOSTAT

( IF USED)

[

I

J

I
I
I

I

I
]
/_

WHEN OUTDOOR THERMOSTAT
IS USED, CONNECT LEADS TO TERMINALS
AND REMOVE JUMPER BETWEEN TERMINALS "R' AND "W2."

//_

EMERGENCY
HEAT RELAY (USED ONLY IF OUTDOOR T'STAT IS USED) FIELD PROVIDED
INSTALLED NEW INDOOR UNIT. 24VAC 5VA MAX NEC/CEC CLASS 2

/_

USING

SERVICE

LIGHT

QUIRE

MOVING

$54 COMMON

OPTION

($54)WITH

SOME

ELECTRONIC

"R" AND "W2"

THERMOSTATS

MAY

(M If
U3
_2

AND

RE-

_I:_(J¢r
I_ _--

WIRE TO Y1 IN HEAT PUMP UNIT.

"5::1h

A
COMMON
//_

Y2 USED

//_

AMBIENT

USED
ONLY

ONLY
WHEN

ON SOME
TWO

COMPENSATING

SPEED

THERMOSTATS.
COMPRESSOR

THERMISTOR

I--_IS USED

CONNECTION

(HP21).

USED

ONLY

--

HIC
ON

SOME

THERMOSTATS.

Figure 8. Heat Pump Applications
Page 10
505340M

07/07

with Electric Heat

i,,I,
DD

5

rqE]D

o

z
o
o

oo

FIELD
WIRING
FOR ECB
SERIES
UNITS
WITHOUT
CIRCUIT
BREAKERS

FIELD
UNITS
CIRCUIT

A CIRCUIT
i_
LI

_

:

L2

_

r

=

: _

ALS

WIRING
FOR ECB SERIES
WITH
CIRCUIT
BREAKERS

3

CIRCUIT

A cBs Z_

Z2_

Z

LI "ll"'xT %

A

ALS--_--

EOGIPMENT

GROUND

GROUND LOCATED IN INDOOR
CONNECT POWER WIRES PROM
HEATER LABELED LI,LZ
ON
"P" VOLTAGE UNITS
AND
LI,L2,LB
ON "Y" VOLTAGE
UNITS TO TB2 TERMINAL
STRIP IN INDOOR UNIT,

A
Z_

J2
%-I
/

L2"II'" 2

ALB_

EQUIPMENT
EQOIPMENT
EQUIPMENT

GROUND

z_EQUIPMENT

Z_ CB_A
L p'mII'XT_

L2 ...le.....2LS_
--

--Z_

I

CIRCUIT

z_ CB2Z_

GROUND

UNIT

A
L_
Z_

LB IS NOT PRESENT
ON
(P) ELECTRIC
HEATERS

THE NUMBER TOOF HEATER
CIRCUITSMODEL.
VARY
ACCORDING
REFER TO FAN COIL NAMEPLATE
FOR ACTUAL NUMBER EMPLOYED
24V

BLUE

GROUND

POWER

R

f

A

ECON
-6

_)CB8
BLUE

BLOWER

G
Wl
W2

KEY
B5
C4
CB8
FI
J2
KB,-f,_
K4_,-!
T!
TBI

CB SERIES
DESCRIPTION
COMPONENT
MOTOR-BLOWER
CAPACITOR-BLOWER
MOTOR
CIRCUIT
BREAKER-TRANS
TI
FUSE-TRANSFORMER
JACK-ELECTRIC
HEAT
RELAY-CONTACTORrBLOWER
RELAY-ECONOMIZER
HEAT
TRANSFORMER-CONTROL
TERM. STRIP-CLASS
II
ECB

ICB3
ITB_
3 5PD

SERIES

CIRCUIT
BREAKER-ELECT,
DESCRIPTION
CIRCUIT
BREAKER-ELECT,
ICIRCUIT BREAKER_ELECT.
ITERMINAL
STRIP _UNIT

HT
HT
HTI

MOTOR SPEED TAP CHART
MOTOR
5 SPD MOTOR
MOTOR
SPEED
I
COMMON
2
HIGH
3
MEDIUM HIGH
5
4
MEDIUM
5
MEDIUM LOW
4
6
LOW
I
2

(

EQUIP
GROUND

--

[_H:I

24V

COMMON

C

A

REFER
CHART
_L

A

TO
ON

FACTORY
BLOWER SPEED TAP SELECTION
UNIT FOR BLOWER
SPEED
INFORMATION

NEC/CEC
CLASS 2 3VA
USE COPPER CONDUCTORS
ONLY,
REFER TO UNIT RATING
PLATE FOR MINIMUM
CIRCUIT
AMPACITY
AND MAXIMUM
OVERCURRENT
PROTECTION
SIZE
LS CONNECTION USED ON (Y) ELECTRIC
HEATERS

ONLY

SPEED
MOTOR SHOWN
THIS WIRE USED ON "T"
VOLTAGE UNITS ONLY
A

EBB

USED
LINE

--

--

CLASS

ON

51

VOLTAGE
II

AND

61

UNITS

FIELD

VOLTAGE

ONLY

WIRING
FIELD

WIRING

Figure 9. CB30U Air Handler Typical Wiring

Diagram

Page 11
CB3OU/CBX27UH

SERIES

,&IMPORTANT

I

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.

Page 12
505340M

07/07

Figure 1. Repairing Insulation

,&WARNING
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