Lennox International Inc T-CLASS TM SEPARATED COMBUSTION UNIT HEATERS Unit Heater Installation

Page 5

.

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

 

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.

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

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.

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Model

No. of Elbows

1

2

3

4

5

45, 60, 75

Ft (M)

25(7.6)

20(6.1)

15(4.6)

10(3.0)

5 (1.5)

100, 125

Ft (M)

25(7.6)

20(6.1)

15(4.6)

10(3.0)

5 (1.5)

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Contents TUA*SN,LA,SF Table Of Contents45, 60, and 75 Unit Dimensions Unit Clearances 125 Unit DimensionsRequirements CSA in Canada ShippingRequirements CSA in the USA Combustion and Ventilation Air Unit Heater InstallationVenting and Combustion Air Inlet Horizontal Venting-Commercial Vent and AIR Intake Termination on Single Wall VentHorizontal Venting General General Condensate Drain Through TEE Pipe and Drain LoopRecommendations Requirements Recommendations and Requirements. In areasCondensate Drain Through Vent Termination Vertical Vent Requirements Horizontal Venting Residential InstallationHorizontal Vent Requirements Horizontal Venting-Residential Two PipesRemoval Of Unit From Common Vent Horizontal Venting Concentric Vent InstallationHorizontal Venting Concentric Kit Residential Electrical Connections Line Voltage Field WiringGAS Supply to Unit Heater GAS Supply Connection Gas ConnectionLeak Check Operation for Honeywell VR8205 Series Gas Valve Figure Unit Start-UpRobertshaw 2000DER GAS Valve White Rodgers 36E GAS ValveTo light the burners manually Attempt to light the burners manuallyHeating Sequence of Operation To Turn Off Gas To UnitIgnition Control LED Optional Gas Conversion KitCombustion Air Inducer Proving Switch Louver Vane AdjustmentFlame Rollout Switch Limit ControlGas Flow Rate Ft.3/Hr Gas FlowLP/PROPANE GAS Manifold Pressures in.wg. kPa Burners Repair PartsFlue Passageway and Flue Box Combustion Air BlowerTUA45/60/75/100/125SN,LA,SF

TUA45S, T-CLASS TM SEPARATED COMBUSTION UNIT HEATERS, TUA75S, TUA100S, TUA60S specifications

Lennox International Inc. stands out as a leader in the heating and cooling industry, and its T-Class™ Separated Combustion Unit Heaters, including models such as TUA60S, TUA100S, TUA125S, and TUA45S, epitomize innovation and efficiency. These unit heaters are engineered to provide reliable warmth in commercial and industrial environments, ensuring comfort and productivity even in the coldest conditions.

One of the most significant features of the T-Class™ heaters is their separated combustion design. This technology allows the heater to draw air for combustion from outside the building, which means that interior air remains untouched and is not used for heating. This design not only improves indoor air quality but also enhances energy efficiency by minimizing heat loss.

The TUA60S, with a heating capacity of 60,000 BTUs, is ideal for smaller spaces, while the TUA100S provides a robust 100,000 BTUs, making it suitable for medium-sized areas. For larger installations, the TUA125S delivers a powerful 125,000 BTUs, ensuring even the most expansive environments remain comfortably warm. Lastly, the TUA45S is perfect for smaller facilities or specific zones requiring efficient heating solutions.

These heaters are equipped with advanced technology such as modulating burners that adjust the heat output based on the current temperature needs, leading to energy savings and reduced operational costs. The T-Class™ units are designed with reliable components, ensuring longevity and reducing maintenance requirements. Additionally, the exterior reflects a modern and durable finish, ensuring they withstand the rigors of industrial settings.

Installation is straightforward thanks to their flexible configurations, allowing for both vertical and horizontal venting options. This adaptability makes them suitable for various applications, from warehouses to manufacturing plants.

In terms of safety, Lennox emphasizes top-tier mechanisms, including built-in safety limits and high-temperature shutoff features to prevent overheating. Furthermore, their models are compliant with industry regulations, reflecting Lennox International's commitment to safety and environmental stewardship.

In conclusion, Lennox International Inc.’s T-Class™ Separated Combustion Unit Heaters, including the TUA60S, TUA100S, TUA125S, and TUA45S, offer a blend of efficiency, reliability, and advanced technology. These heaters are suitable for a variety of commercial and industrial applications, ensuring optimal comfort while prioritizing safety and energy savings.
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