Lennox Elite CB30U Series, Elite CB30U-21, Elite CB30U-26, Elite CB30U-31, Elite CB30U-41 Installation Instructions Manual

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,B,2007 Lennox IndustrIes Ins.

Da{las, Texas, USA

INSTALLATION
INSTRUCTIONS

X_ WARNING

_, CAUTION

IMPORTANT

_, IMPORTANT

Elite® Series CB30U Units

AIR HANDLER F[_ Technical
505,340M J_LL Publications

07/07 Litho U.S.A.
Supersedes 504,720M

CB30U Up-flow Unit Dimensions ................ 2

CB30U Up-flow Side Return Air Filter Adapter ..... 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 ......... 12

RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE

BLOWER MOTOR

SHIPPING BOLT

TOP CAP SHIPPING BRACKET (REPLACE

SCREWS IN TOP CAP AFTER REMOVAL)

C

CHECK FOR AND REMOVE THE FOLLOWING ITEMS BEFORE OPERATING UNIT.

BLOWER HOUSING SUPPORT PAD

B

BLOWER MOTOR SHIPPING

BRACKET

D

REFRIGERANT LINE CAPS [SEE BRAZING

CONNECTION ON PAGE 4]

E

@..

07/07

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Page1

505,340M

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3/4

t(19)

3/4 3/4

(19)_ _1_)

DETAIL OF PIPING PLATE

t 5/8

OPTIONAL

ELECTRIC

HEAT
(Field

InstaBed)

FILTER

ACCESS

A

LIQUID

LINE

SUCTION

LINE

K

SIDE VIEW

LINE VOLTAGE LOW VOLTAGE

INLETS INLETS

(Top and Left Side) (Top and

TOP VIEW

Right Side)

I
I

JL__J JL_

5/8 F (215) BottEom

Bottom 5/8

Return Air (16)

(16) Return Air

FRONTVIEW

Model CB30U-21/26 CB30U-31 CB30U-51 / CB30U-65

No. inch mm inch mm mm inch mm

A 45-1/4 1149 49-1/4 1251 1334 58-1/2 1486

B 16-1/4 413 21-1/4 540 540 21-1/4 540
C 20-5/8 524 20-5/8 524 575 24-5/8 625
D 14-3/4 375 19-3/4 502 502 19-3/4 502

E 19 483 19 483 533 23 584

F 15 351 20 508 508 20 508

CB30U-41/46

inch
52-1/2
21-1/4
22-5/8

19-3/4

21

2O

G ............... 27-7/8 708

H ............... 30-5/8 778

J 14-1/4 362 18-1/4 464 464 18-1/4 464
K 1-1/8 29 1-1/8 29 54 3-1/8 79

L 7-1/8 181 9-5/8 244 244 9-5/8 244
M 6-1/4 159 6-1/2 165 165 6-1/2 165
N 6-5/8 168 9-1/8 232 232 9-1/8 323

P 4-1/8 105 4-9/16 116 116 4-9/16 116

18-1/4

2-1/8
9-5/8
6-1/2
9-1/8

4-9/16

(19)

3/4

1-3/16

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AIR FILTERS

(FURNISHED)

505340M 07/07

*NOTE - Air flow may be either direction.

FRONT VIEW SIDE VIEW

I_ (25)

Page 2

Model CB30U-51 and CB30U-65

CB30U-21/26 CB3OU-31 , CB30U-41/46

Number

Inch mm Inch mm

A 16 406 20 508
B 14 356 18 457

WARNING

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 handlerunit

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:

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

• 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.

I

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.

WARNING

IMPORTANT

DISASSEMBLE/REASSEMBLE 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:

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

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 and corrugated padding

Step 2. Place unit in desired location. Set unit so that it

Step 3, Mount units that have no return air plenum on a

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

Model Kit Number

-21, -26, and -31 45K31
41 through-65 45K32

inside the unit, Remove one screw from each
side on the back of the unit, Unit sections will now

separate,

between the blower and coil assembly before
operation,

is level. Connect return and supply air plenums
as required using sheet metal screws.

stand at least 14" from the floor for proper air
return, Lennox offers an optional up-flow unit

stand as listed in table 1.

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

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

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

Step 1,
Step 2,
Step 3.

Step 4.

Step 5.

Remove the coil access panel,
Remove the coil assembly from the cabinet,

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

opening of the cabinet,
Connect the return and supply air plenums as

required.

B

I AIR HANDLER UNIT

SUCTION LINE

LIQUID LINE

Figure 2. Brazing Connections

Ak IMPORTANT

CUT BOTH SIDES OF CABINET FOR -41/46, -51 AND -65 UNITS.

Figure 1. CB3OU Side Return Air Dimensions

Table 3. Side Return Air Dimensions

CB3OU CB30U CB30U CB30U-51

Model # -21/26 -31 -41/46 CB30U-65

inch (mm) inch (mm) inch (mm) inch (mm)

18-1/4

A 14-1/4 (362) 18-1/4 (464) (464) 18-1/4 (464)
B 1-1/8 (29) 1-1/8 (29) 2-1/8 (54) 3-1/8 (79)

505340M 07/07

Page 4

Table 4. Refrigerant Line Sets

CB30MV LIQUID SUCTION L10 L15

UNIT LINE LINE SETS LINE SETS

-21/26 (10 mm) (16 mm) 20 ft, - 50 ft, 20 ft. - 50 ft.

-31 -41/16 (10 mm) (19 mm) 20 ft, - 50 ft. 20 ft. - 50 ft.

-51 30 if, - 50 ft, 30 ft. - 50 ft.

-65 (10 ram) (29 ram) FABRICATED FABRICATED

3/8 in 5/8 in.

3/8 in 3/4 in,

3/8 in 7/8 in.

(10 mm) (22 mm) (9 m - 15 m) (9 m- 15 m)

3/8 in 1-1/8 in, FIELD FIELD

VAPOR/

LINE

L10-26 L15-26

(6m- 15m) (6m-15m)

L10-41 L15-41

(6 m - 15 m) (6 m- 15 m)

L10-65 L15-65