Lennox TUA60S, TUA100S, TUA45S, TUA125S, TUA75S User Manual

0 (0)

Litho U.S.A.

2003

Lennox Industries Inc.

INSTALLATION INSTRUCTIONS

TUA*S(N,L)(A,S)F

*045, 060, 075, 100, and 125

Dallas, Texas, USA

 

 

 

T-CLASSTM SEPARATED COMBUSTION

 

 

 

 

UNIT HEATERS

 

Table Of Contents

 

 

 

 

 

Unit Dimensions………………………………

1, 2

Leak Check………………………………………..

13

Shipping………………………………………

3

Start-up Operation………………………………...

14

Requirements…………………………………

3

Heating Sequence of Operation…………………

16

Unit Heater Installation………………………

4

Ignition Control LED………………………………

16

Combustion

&

Ventilation

4

Adjustments…………………….………………….

17

Air…………………

 

 

 

 

 

Venting…………………………………………

5

Service……………………………………………..

19

Electrical Connections………………………

12

Wiring Diagram………………….………………..

20

Gas Connection………………………………

13

 

 

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

WARNING

If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

WHAT TO DO IF YOU SMELL GAS:

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

Installation and service must be performed by a qualified installer, service agency or the gas supplier.

Do not try to light any appliance.

Extinguish any open flame.

Do not touch any electrical switch; do not use any phone in your building.

Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.

If you cannot reach your gas supplier; call the fire department.

P/N: 065354800

ORGINATED: 5/04

REVISED: 11/04

SUPERSEDES: NEW

Technical literature form number 504,955M

Lennox TUA60S, TUA100S, TUA45S, TUA125S, TUA75S User Manual

START-UP AND PERFORMANCE CHECK LIST

Job Name:___________________

Job No.:_______________________

Date:_________________________

Job Location:_________________

City:__________________________

State/Province:_________________

Installer:_____________________

City:__________________________

State/Province:_________________

Unit Model No.:_______________

Serial No.:_____________________

Service Technician:______________

Electrical Connections Tight?______________________

Flue Connections Tight?__________________________

Supply Voltage_________________________________

Unit Operation Checked?__________________________

Gas Piping Connections Tight & Leak Tested?________

THERMOSTAT

 

Motor Amps___________________________________

Calibrated?___________________________________

Unit BTU Input________________________________

Heat Anticipator Properly Set?___________________

Line Pressure__________________________________

Level?_______________________________________

Manifold Pressure___________________in. w. c.

 

 

45, 60, and 75 UNIT DIMENSIONS

 

 

 

 

13

13

 

 

 

 

 

(330)

(330)

 

 

 

 

7-1/4

HANGING

7

 

 

 

 

(184)

(178)

 

 

 

 

BRACKETS

 

 

 

3-1/4

 

3

1

 

 

 

(2)

 

 

(83)

 

 

(76)

(25)

 

MOUNTING SLOTS (Typical)

 

 

 

 

 

 

5/16 x 3 Inches (8 x 76 mm)

 

 

 

 

 

 

 

 

 

 

1/2

 

 

 

 

 

 

(13)

 

 

 

 

 

AIR

 

DIMENSION

45

60/75

 

 

FLOW

 

A

12 (305)

17 (432)

 

 

 

 

B

5-1/2 (140)

6-1/2 (165)

 

 

 

18-1/2

C

7-3/4 (197)

10-1/4 (260

 

 

 

(470)

 

 

 

 

D

1-3/4 (44)

3-1/4 (83)

 

 

HEAT

 

E

5-1/4 (133)

5-3/4 (146)

 

 

 

 

 

EXCHANGER

 

 

 

B

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

(25)

 

18-1/2

 

 

(470)

 

 

HANGING

 

BRACKETS (2)

 

 

SITE

 

 

GLASS

THUMB

ADJUSTABLE

SCREW

LOUVERS

SIDE VIEW

 

 

 

 

 

TOP VIEW

 

 

 

26

 

1

 

 

 

(25)

 

5-3/4

(660)

 

 

 

 

GAS

(146)

 

 

 

INLET

 

 

 

 

ELECTRICAL

 

 

 

 

BOX (60, 75)

 

 

 

 

FLUE

 

 

 

A

OUTLET

 

 

 

 

 

C

 

 

E

 

 

 

 

 

D

COMBUSTION AIR

 

 

 

ELECTRICAL

INLET

DIRECT

 

 

 

 

 

 

DRIVE FAN

 

 

BOX (45)

BACK VIEW

 

 

 

 

Page 1

100 and 125 UNIT DIMENSIONS

 

THREADED STUDS

 

5-1/2

 

24-7/16

(140)

 

 

 

 

(621)

 

 

 

AIR

21-5/16

 

 

FLOW

(541)

32-3/8

 

 

 

 

 

(822)

 

 

 

 

 

HEAT

 

7-1/4

 

EXCHANGER

 

 

(ALUMINIZED STEEL)

 

(184)

 

 

 

 

 

 

 

 

1/2

 

 

 

(13)

TOP VIEW

 

32-3/8

 

 

(822)

 

 

THUMB

 

 

SCREW

 

ADJUSTABLE

SITE

SERVICE

GLASS

ACCESS

LOUVERS

 

DOOR

SIDE VIEW

 

 

36-1/2

 

 

 

(927)

 

8-1/2

 

 

DIRECT

(216)

7-3/8

FLUE

 

DRIVE FAN

 

(187)

OUTLET

 

 

ELECTRIC

 

 

 

BOX

 

 

 

 

 

 

21

 

 

 

(533)

7 (178)

 

 

 

 

7-3/4

COMBUSTION AIR INLET

GAS

(197)

 

 

 

 

 

INLET

 

 

 

BACK VIEW

TABLE 1

UNIT CLEARANCES

 

 

Top

 

Sides

 

Access Panel

Bottom

 

Rear

Single Wall Vent*

Model

in

 

mm

in

 

mm

 

in

mm

in

mm

in

 

mm

in

mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TUA45S, TUA60S, TUA75S,

1

 

25

1

 

25

18

457

0

0

18

 

457

6

152

TUA100S, TUA125S

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Except for listed clearance thimbles

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 2

Shipping

The heater is completely assembled. Two mounting brackets are included with the 45, 60, and 75 size units. Check the unit for shipping damage. The receiving party should contact the last carrier immediately if any shipping damage is found.

Requirements – CSA in the USA

Installation of gas unit heaters must conform with local building codes or, in the absence of local codes, with the current National Fuel Gas Code ANSI Z223.1.

Installation in aircraft hangers must be in accordance with the current Standard for Aircraft Hangers ANSI/NFPA No. 409.

Installation in parking structures must be in accordance with the current Standard for Parking Structures ANSI/NFPA No. 88A.

Installation in repair garages must be in accordance with the current Standard for Repair Garages ANSI/NFPA No. 88B.

These units are approved for residential applications. Residential applications are defined as installations for heating non-living spaces that are attached to, adjacent to or part of a structure that contains space for family living quarters. For installation in a residential garage these units must be installed so that burners and ignition source are located no less than 18" (457mm) above floor. Heater must be located or protected to avoid physical damage by vehicles. Refer to the National Fuel Gas Code, ANSI Z223.1, current edition.

Authorities having jurisdiction should be consulted before installation.

The National Fuel Gas Code is available from: American National Standard Institute Inc. 11 West 42nd Street

New York, NY 10036

These units are CSA International design certified. These unit heaters are certified for installation clearances to combustible material as listed in table 1 and on unit rating plate. Accessibility and service clearances must be observed in addition to fire protection clearances.

All electrical wiring and ground for unit must be in accordance with the regulations of the current National Electric Code ANSI/NFPA No. 70.

The National Electric Code is available from: National Fire Protection Association 1 Batterymarch Park

PO Box 9101

Quincy, MA 02269-9101

Page 3

Requirements – CSA in Canada

The instructions are intended only as a general guide and do not supersede local codes in any way. Authorities having jurisdiction should be consulted before installation. The installation must conform with local building codes or in the absence of local codes, with the current code CSAB149.1 “Installation Code for Natural Gas Burning Appliances and Equipment." All electrical wiring and grounding for the unit must also comply with the Canadian Electrical Code CSA C22.1, current edition.

These unit heaters are CSA International certified for the clearances to combustible material listed on the rating plate and table 1. Adequate clearance shall be provided around the appliance and around air inlet terminals. Provision shall be made for service accessibility to the heater. Note that fire protection clearances may be exceeded to provide additional space for service and accessibility.

GARAGE INSTALLATIONS:

1- In a storage area, clearance from heaters to combustible materials must be such that the material shall not attain a temperature above 160°F by continuous operation of the unit.

2- Eight foot minimum clearance from the floor to the bottom of the heater must be maintained. Refer to the CSA-B149 Codes.

AIRCRAFT HANGER:

1- In an area where aircraft are housed or serviced, 10' minimum clearance from highest surface of aircraft to bottom of the heater must be maintained.

2- In other areas, 8' minimum clearance from the floor to bottom of heater must be maintained.

3- Heaters should be located so as to be protected from damage from aircraft or other appliances needed for servicing of aircraft. Refer to requirements of the enforcing authorities.

RESIDENTIAL INSTALLATIONS:

These units are approved for residential applications. Residential applications are defined as installations for heating non-living spaces that are attached to, adjacent to or part of a structure that contains space for family living quarters. For installation in a residential garage, these units must be installed so that burners and ignition source are located no less than 18" (457mm) above floor. Heater must be located or protected to avoid physical damage by vehicles. Refer to CSA-B149.1, current edition.

Be sure to check with local codes and ordinances for additional requirements.

.

Unit Heater Installation

INSTALL UNIT HEATER

 

MOUNTING BRACKETS

SUPPORT

(45, 60, & 75 MODELS

RODS

ONLY)

 

NORMAL POSITION (ABOVE) ALL MODELS

MOUNTING

SUPPORT

BRACKETS (45, 60,

&75 MODELS ONLY)

RODS

 

OPTIONAL INVERTED POSITION (ABOVE)

45, 60, AND 75 MODELS ONLY

 

FIGURE 1

45, 60, and 75 size units may be installed in the normal position or inverted 180° as shown in figure 1 depending on desired location as governed by clearances, vent connection, air direction, gas supply, electrical supply and service accessibility.

1- Rotate louvers directing airflow as desired.

2- Choose location for mounting brackets.

3- Remove the mounting brackets from their shipping location (attached to the top of the unit) and replace the screws that held the brackets in their shipping location.

4- Remove and retain screws along top edge (bottom edge when inverted) of front of unit.

5- Align screw holes on mounting bracket with holes along top edge (either upright or inverted) of unit.

Page 4

Secure mounting brackets to unit with retained screws.

6- To support unit, secure mounting bracket to ceiling joist or truss. Unit may also hang on rods as shown in figure 1.

100 and 125 size units may not be inverted, 3/8” X 16 threaded inserts are provided in the top the cabinet. Two threaded inserts are along one edge of the cabinet, two inserts are in the panel that divides the heat exchanger section from the control compartment.

1- Cut threaded rods to desired length and thread a 3/8” nut onto the rod.

2- Slide a flat washer onto the threaded rod AFTER the nut (7/16” I.D. X 1” O.D. X 1/16” THK washer).

3- Screw the rods (four) into the threaded inserts on the unit.

4- Tighten nuts to secure unit to rods.

Combustion and Ventilation Air

Adequate facilities for supplying air for combustion and ventilation must be provided. All gas fired appliances require air to be used for the combustion process. If sufficient quantities of combustion air are not available, the heater or another appliance will operate in an inefficient manner, resulting in incomplete combustion which can result in the production of excessive carbon monoxide.

CAUTION - Insufficient combustion air can cause headaches, nausea, dizziness, asphyxiation or death.

This unit must be provided with a combustion air pipe that is connected to the outside atmosphere. Outdoor air used for combustion must be free of the following substances or the life of the heat exchanger will be adversely affected: chlorine, carbon tetrachloride, cleaning solvent, halogen refrigerants, acids, cements and glues, printing inks, fluorides, paint removers, varnishes, or any other corrosives.

TABLE 2

MAXIMUM HORIZONTAL VENT LENGTHS

Model

45, 60, 75

100, 125

 

 

 

No. of Elbows

Ft (M)

Ft (M)

 

 

 

 

 

 

1

25 (7.6)

25 (7.6)

 

 

 

2

20 (6.1)

20 (6.1)

 

 

 

3

15 (4.6)

15 (4.6)

 

 

 

4

10 (3.0)

10 (3.0)

 

 

 

5

5 (1.5)

5 (1.5)

Venting and Combustion Air Inlet

A-General Recommendations and Requirements

NOTE - The vent is a passageway, vertical or nearly so, used to convey flue gases from an appliance, or its vent connector, to the outside atmosphere. The vent connector is the pipe or duct that connects a fuel-gas burning appliance to a vent or chimney. The combustion air inlet is a pipe that connects the appliance to the outside atmosphere to convey oxygen from the air to the appliance burner.

Unit heaters must be vented in compliance with all local codes or requirements of the local utility, the current standards of the (American) National Fuel Gas Code, ANSI Z223.1 or (Canada) CSA-B149 Installation Codes, and the following instructions.

A vent connection flange and a combustion air pipe connection flange are attached to the back of the unit. Single wall vent material shall have all seams and joints sealed with pressure sensitive aluminum tape or silicone rubber sealant. Aluminum tape must meet the provisions of SMACNA AFTS-100-73 Standards. The aluminum tape has a temperature rating of 400°F (204°C). Silicone rubber sealant must have a temperature rating of 482°F (250°C), i.e., Dow Corning RTV-736 or equivalent. All joints shall be secured with at least two corrosion resistant screws. All joints must be checked for gas tightness after installation.

Single wall vent shall not pass through any attic, interior wall, concealed space, or floor.

B-Vertical Vents Using Metal Vent PipeCommercial and Residential Installations

These separated combustion unit heaters are listed as Category I appliances for vertical vent installations.

1-These unit heaters are to be vented with NFPAor ANSIapproved chimneys, U.L. listed type B-1 gas vents, single wall metal pipe, or listed chimney lining system for gas venting where applicable, as well as the modifications and limitations listed in figure 2. Seal single wall vent material according to the section A-General Recommendations and Requirements. Air inlet pipe may be single wall metal pipe or U.L. listed single wall metal flex connector. A concentric vent/adapter/cap kit as specified in these instructions may be used for vertical termination. Refer to table 3.

2- The vent connector shall be 3" (76mm) diameter on 45 units, 4" (100mm) diameter on 60/75 units, and 5” (127mm) on 100/125 units. The air inlet pipe shall

be 3” (76mm) diameter on 45 units and 4” (100mm) diameter on 60/75/100/125 units.

3- Keep the vent and air inlet runs as short as possible with a minimum number of elbows. Refer to the (American) National Fuel Gas Code ANSI Z223.1 or (Canada) CSA-B149 Installation Code for maximum vent and vent connector lengths. Horizontal run of the vent connector from the induced draft blower to the chimney/vent cannot exceed the values in table 2. Single wall vent connector shall not be insulated.

4- If a single wall vent is used in an unheated area it shall be insulated with a minimum of 1/2" thick foil faced fiberglass 1-1/2# density insulation. Failure to do so will result in condensation of flue gases.

5- The unit may be vented vertically as a single appliance or as a common vent with other gas-fired appliances. In common venting situations, vent connectors for other appliances must maintain a 4" (100mm) vertical separation between the vent connectors. Refer to common venting tables in the (American) National Fuel Gas Code ANSI Z223.1 or (Canada) CSA-B149 Installation Code for proper vent size.

6- Clearance to combustible material is 6" (152mm) for single wall vent material except where a listed clearance thimble is used. Clearance to combustible material for type B-1 vent or factory-built chimney is per manufacturer’s instructions. Clearance to combustible material is 1” on vertical sections of the concentric vent/adapter/cap kit.

7- The vent connector shall be supported without any dips or sags. Vertical vents shall be supported in accordance with their listing and manufacturers’ instructions. All horizontal vent connector runs shall have a slope up to the vertical vent of at least 1/4" per foot (1mm per 50mm).

8- All vertical type B-1 vents, single wall vents, or listed chimney lining system must be terminated with a listed vent cap or listed roof assembly.

9- The vent must extend at least 3' (1m) above the highest point where it passes through a roof of a building and at least 2’ (0.6m) higher than any part of a building within a horizontal distance of 10' (3.05m) unless otherwise specified by the (American) National Fuel Gas Code, ANSI Z223.1 or (Canada) CSA-B149 Installation Codes. The vent must extend at least 5' (1.6m) above the highest connected equipment flue collar.

Page 5

VENT AND AIR INTAKE TERMINATION ON SINGLE WALL VENT

SINGLE WALL TERMINATION

ROOF FLASHING

ROOF PITCHED

FROM 0" TO 45"

SHALL NOT BE A CONCEALED SPACE

2" CLEARANCE

THIMBLE

DOUBLE WALL (TYPE B-1) TERMINATION

ROOF FLASHING

 

ROOF PITCHED

 

FROM 0" TO 45"

 

12" MAX

CLEARANCE TO BE

 

 

AS SPECIFIED ON

 

TYPE “B" VENT PIPE.

SEAL JOINT BETWEEN SINGLE WALL VENT AND “B" VENT AND THE ANNULAR SPACE OF THE “B" VENT.

FIGURE 2

C-Horizontal Venting - General

Common venting is not allowed with horizontal vent.

The minimum horizontal vent length is three feet (914mm). 1- If possible, do not terminate the horizontal vent through a wall that is exposed to prevailing wind. Exposure to excessive winds can affect unit performance. If such a termination is necessary, use a wind block to protect the vent termination from direct

winds.

2- Vent termination must be free from obstructions and at least 12" (306mm) above grade level and maximum snow height.

3- Do not terminate vent directly below roof eaves or above a walkway, or any other area where condensate dripping may be troublesome and may cause some staining. Avoid windows where steam may cause fogging or ice buildup.

4- When horizontally vented, minimum clearance for termination from any door, window, gravity air inlet, gas or electric meter, regulators, and relief equipment is 4 ft. (1.2m) for U.S. installations. Refer to NFPA 54/ANSI Z223.1 in the U.S.A. and CSA B149.1 and .2 in Canada or with authorities having local jurisdiction. In Canada, vent termination must have a minimum 6 ft. (1.8mm) horizontal clearance from gas and electric meters and relief devices as specified in the Canadian B149.1, Natural Gas Installation Code.

5- Vent termination must be a minimum of 4' (1.2m) below or 4’ (1.2m) horizontally from any soffit vent or under-eave vent.

6- Vent must be a minimum of 6' from an inside corner formed by two exterior walls. If possible, leave a 10' clearance.

7- Vent termination must be a minimum of 10' (3m) from any forced air inlet (includes fresh air inlet for other appliances, such as a dryer).

8- When termination is routed through an exterior combustible wall the vent must be supported using a listed clearance thimble. Where local authorities permit, a single section of type B-1 vent pipe may be

used as an alternative to the thimble. When using a type B-1 vent termination use the clearances specified by the vent manufacturer. Seal the connection between the single wall and double wall pipes and the annular space of the double wall pipe as shown in figure 2. Inside edge of vent termination tee or Belmont cap must be at least 12 inches from outside wall as shown in figure 3.

9- All horizontal vents must terminate with a tee or with a cap as specified in table 4. Opening end of tee used for termination must face downward. Addition of ¼” (6mm) mesh corrosion resistant material as a bird screen in the tee or cap openings may be used.

9- For horizontal venting, the vent pipe shall be supported with hangers no more than 3ft. (1m) apart to prevent movement after installation.

10-Clearance to combustible material is 6" (152mm) for single wall vent material except where a listed clearance thimble is used. Clearance to combustible material for type B-1 vent or factory-built chimney is per manufacturer’s instructions. Clearance to combustible material is 1” at the sides, 1” below, and 3” above on horizontal installations of the concentric vent/adapter/cap kit

D-Horizontal Venting-Commercial

1- Horizontal commercial installations are for buildings that are not attached to living spaces. The vent may be single wall vent material installed according to the sections Venting A-General Recommendations and Requirements and C- Horizontal Venting - General and D-Horizontal Venting - Commercial. Refer to figures 3, 4, and 5. The air inlet may be single wall vent material or U.L. listed single wall flex connector.

2- Refer to table 2 for maximum vent lengths. The vent pipe diameter for horizontal commercial installations shall be 3” (76mm) on 45 units, 4” (100mm) on 60/75 units, 5” (127mm)on 100/125 units.

Page 6

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