Lennox T?CLASS TAA SERIES, TAA072, TAA090, TAA120, TAA150 Installation Instructions Manual

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

WARNING

Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.

Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.

CAUTION

Physical contact with metal edges and corners while
applying excessive force or rapid motion can result in
personal injury. Be aware of, and use caution when
working near these areas during installation or while
servicing this equipment.

IMPORTANT

The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.

INSTALLATION
INSTRUCTIONS

T−CLASSE TAA SERIES

AIR HANDLERS
6 TO 20 TONS

506149−01
04/11
Supersedes 8/09

Table of Contents

General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shipping and Packing List 1. . . . . . . . . . . . . . . . . . . . . .

TAA072 and TAA090 Unit Dimensions 2. . . . . . . . . . .

TAA120 and TAA150 Unit Dimensions 3. . . . . . . . . . .

TAA180 and TAA240 Unit Dimensions 4. . . . . . . . . . .

Unit Parts Arrangement 5. . . . . . . . . . . . . . . . . . . . . . . .

Unit Control Box Components Arrangement 6. . . . . . .

Typical Installation Support Method 6. . . . . . . . . . . . . .

Requirements 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Refrigerant Piping Connections 7. . . . . . . . . . . . . . . . . .

Installing Condensate Drain 8. . . . . . . . . . . . . . . . . . . . .

Duct Connections 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Sealing the Unit 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Wiring 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blower Motor Belt Tensioning Adjustment 12. . . . . . . . .

Pulley Alignment 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Volume Adjustment 13. . . . . . . . . . . . . . . . . . . . . . . . .

Blower Data 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blower Drive Components 15. . . . . . . . . . . . . . . . . . . . . .

Blower Performance 16. . . . . . . . . . . . . . . . . . . . . . . . . . .

Repairing or Replacing Cabinet Insulation 20. . . . . . . . .

Optional Accessories 20. . . . . . . . . . . . . . . . . . . . . . . . . .

General

The TAA Series 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 and are designed for upflow or
horizontal applications.

Litho U.S.A.

WARNING

Electric Shock Hazard.

Can cause injury or death.

Foil-faced insulation has conductive characteristics sim­ilar to metal. Be sure there are no electrical connections
within a ½" of the insulation. If the foil-faced insulation
comes in contact with electrical voltage, the foil could
provide a path for current to pass through to the outer
metal cabinet. While the current produced may not be
enough to trip existing electrical safety devices (e.g.
fuses or circuit breakers), the current can be enough to
cause an electric shock hazard that could cause person­al injury or death.

08/ 506149−01

*2P08* *P506149-01*

Shipping and Packing List

Package contains the following:
1  Assembled blower coil unit
8  Supply and return air flanges which are stored inside

unit and are listed in table 2, on page 9.
1  Bag assembly that consists of the following:

S One installation instruction
S Two wiring diagrams (unit wiring and thermostat

connections)

S Six plastic grommets (various sizes) for line set

knockouts.

Check package contents for shipping damage; if found,
immediately report damage to the last carrier.

Page 1

TAA072 and TAA090 Unit Dimensions − Inches (mm)

CORNER WEIGHTS CENTER OF GRAVITY

Model No.

TAA072 88 40 88 40 88 40 88 40 25−1/2 648 25−1/2 648
TAA090 88 40 88 40 88 40 88 40 25−1/2 648 25−1/2 648

P−FLOW POSITION SHOWN

29−1/2

(749)

AA BB CC DD EE FF

lbs. kg lbs. kg lbs. kg lbs. kg in. mm in. mm

51−1/4
(1302)

SUPPLY AIR

OPENING

CONTROL BOX

(Alternate Location)

18−5/8

(473)

POWER

ENTRY
HOLES

NOTE:

072 models only use one Suction and Liquid
Line. Cabinet has knockouts for two. Either
opening may be used.

BB

AA

SUPPLY END VIEW

51−1/4
(1302)

1 (25)

TYP.

25−3/4

(654)

EE

FF

(762)

SIDE RETURN

AIR OPENING

1 (25)

RETURN AIR FLANGES

TYP.

(Furnished with Unit,

Field Installed)

30 (762)

RETURN AIR OPENING

(Bottom or Horizontal Applications)

INLET VIEW DRIVE END VIEW

CENTER OF

GRAVITY

30

1−3/8

(35)

20−5/8

(524)

16−7/8

(429)

CONTROL

10−3/4

(267)

2

(51)

BOX

SUPPLY AIR FLANGES

(Furnished with Unit,

Field Installed)

CC

54−3/4
(1391)

26−1/4

(667)

DD

RETURN AIR FLANGES

(Furnished with Unit,

Field Installed)

1−3/8

(35)

CONTROL

BOX

2

(51)

CONDENSATE

DRAIN

(Horizontal)

20−5/8

(524)

1−5/8

(41)

29−1/2

(749)

18−5/8

(473)

AIR FLOW

BLOWER

INDOOR

COIL

AIR FLOW

AIR FILTERS

AIR FLOW

20−5/8 (524)

RETURN AIR

(Bottom or Horizontal Applications)

OPENING

3

(76)

CONTROL BOX
(Alternate Location)

3

(76)

SUCTION (VAPOR) LINE
INLETS / KNOCKOUTS (2)

LIQUID LINE
INLETS / KNOCKOUTS (2)

16−1/2

14

(419)

(356)

11−7/8

(302)

1−7/8

(48)

CONDENSATE

DRAIN (Up−flow)

18−5/8

(473)

506149−01 04/11

Page 2

TAA120 and TAA150 Dimensions − Inches (mm)

CENTER OF GRAVITY

Model No.

CORNER WEIGHTS

AA BB CC DD EE FF

lbs. kg lbs. kg lbs. kg lbs. kg in. mm in. mm

TAA120−150 126 57 101 46 101 46 126 57 33−1/2 851 24−1/2 622

UP−FLOW POSITION

SHOWN

67−1/4

29−1/2

(749)

(1708)

SUPPLY AIR

OPENING

CONTROL BOX

(Alternate Location)

18−5/8

(473)

1−3/8

(35)

POWER

ENTRY
HOLES

CONTROL

BOX

SUPPLY END VIEW

BB

AA

FF

1 (25)

TYP.

67−1/4

(1708)

1 (25)

TYP.

EE

RETURN AIR FLANGES

(Furnished with Unit, Field Installed)

(Bottom or Horizontal Applications)

25−3/4

(654)

CENTER OF

GRAVITY

45

(1143)

SIDE RETURN

AIR OPENING

45 (1143)

RETURN AIR OPENING

20−5/8

(524)

24−7/8

(429)

SUPPLY AIR FLANGES

(Furnished with Unit,

Field Installed)

CC

54−3/4
(1391)

11−1/8

(283)

DD

RETURN AIR FLANGES

2

(Furnished with Unit,

(51)

Field Installed)

CONTROL

CONDENSATE

DRAIN

(Horizontal)

20−5/8

(524)

26−1/4

(667)

1−3/8

(35)

BOX

2

(51)

AIR FLOW

1−5/8

(41)

(Bottom or Horizontal Applications)

29−1/2

(749)

18−5/8

(473)

AIR FLOW

BLOWER

INDOOR

COIL

AIR FILTERS

AIR FLOW

20−5/8 (524)

RETURN AIR

OPENING

(76)

3

(76)

CONTROL BOX
(Alternate Location)

3

SUCTION (VAPOR) LINE
INLETS/KNOCKOUTS (2)

LIQUID LINE
INLETS/KNOCKOUTS (2)

18−5/8

(473)

11−7/8

(302)

1−7/8

(48)

CONDENSATE

DRAIN (Up−Flow)

16−1/2

(419)

14

(356)

INLET VIEW DRIVE END VIEW

Page 3

TAA SERIES

TAA 180 and TAA 240 Unit Dimensions − Inches (mm)

CENTER OF GRAVITY

Model No.

CORNER WEIGHTS

AA BB CC DD EE FF

lbs. kg lbs. kg lbs. kg lbs. kg in. mm in. mm

TAA180−240 110 50 99 45 116 53 130 59 52 1321 25−3/4 654

UP−FLOW POSITION SHOWN

96−1/4

29−1/2

(749)

(2445)

SUPPLY AIR

OPENING

CONTROL BOX

(Alternate Location)

18−5/8

(473)

1−3/8

(35)

POWER

ENTRY

HOLES

CONTROL

BOX

SUPPLY END VIEW

AA

BB

1 (25)

TYP.

1 (25)

TYP.

FF

96−1/4
(2445)

51−5/8
(1311)

CENTER OF

EE

SIDE RETURN

AIR OPENING

RETURN AIR FLANGES

(Furnished with Unit, Field Installed)

59−1/4 (1505)

RETURN AIR OPENING

(Bottom or Horizontal Applications)

GRAVITY

59−1/4
(1505)

20−5/8

(524)

27−1/2

(699)

(Furnished with

CC

18−1/2

(470)

DD

2

RETURN AIR FLANGES

(51)

(Furnished with Unit,

Field Installed)

SUPPLY AIR

FLANGES

Unit, Field

Installed)

CONTROL

54−3/4
(1391)

CONDENSATE

(Horizontal)

26−1/4

(667)

1−3/8

(35)

BOX

2

(51)

DRAIN

20−5/8

(524)

AIR FLOW

1−5/8

(41)

(Bottom or Horizontal Applications)

29−1/2

(749)

18−5/8

(473)

AIR FLOW

BLOWER

INDOOR

COIL

AIR FILTERS

AIR FLOW

20−5/8 (524)

RETURN AIR

OPENING

CONTROL BOX
(Alternate Location)

3

(76)

SUCTION (VAPOR) LINE
INLETS/KNOCKOUTS (2)

LIQUID LINE INLETS/
KNOCKOUTS (2)

11−7/8

(302)

1−7/8

(48)

3

(76)

CONDENSATE

DRAIN (Up−Flow)

16−1/2

(419)

14

(356)

18−5/8

(473)

INLET VIEW DRIVE END VIEW

506149−01 04/11

Page 4

Unit Parts Arrangement

All TAA Series

HORIZONTAL POSITION
SHOWN

BLOWER

BLOWER BELT

CONTROL BOX

072−090−120−150 MODELS

HORIZONTAL POSITION
SHOWN

CONDENSATE DRAIN

COIL

BELT TENSIONER

COIL

BLOWER MOTOR

BLOWER MOTOR

ADJUSTABLE PULLEY

LIQUID LINES

VAPOR LINES

CONDENSATE

DRAIN POSITION

FOR UPFLOW))

ADJUSTABLE PULLEY

BLOWERS

BLOWER BELT

CONTROL BOX

180−240 MODELS

BELT TENSIONER

CONDENSATE DRAIN (HORIZONTAL)

LIQUID LINES

VAPOR LINES

CONDENSATE DRAIN

POSITION FOR

UPFLOW))

Page 5

TAA SERIES

Unit Control Box Components Arrangement

All TAA Series

RELAY (K43)

TERMINAL

STRIP (TB1)

BLOWER

CONTACTOR

(K3−1)

Y, G, AND J VOLTAGE WIRING

GROUND

LUG

Typical Installation Support Method

CONTROL PANEL

THREE−PHASE THERMAL

OVERLOAD RELAY (S42)

M VOLTAGE OVERLOAD WIRING

4 (102) TAA072, 090, 120, 150

10 (254) TAA180, 240

RECOMMENDED
SUPPORT RAILS

TAA AIR HANDLER

(HORIZONTAL POSITION)

4 (102) TAA072, 090, 120,150

10 (254) TAA180, 240

ELECTRIC or HOT

WATER SECTION

NOTES:

1. Ensure support rails do not interfere with ducting, plumbing or
electrical connections.

2. When hot water or electric heat section is installed, additional
support underneath these accessories will be required.

3. Support rods and rails are field supplied.

SUPPORT RODS (4)

506149−01 04/11

Page 6