Lennox International Inc TUA60S, TUA125S, TUA45S, TUA100S, TUA75S Unit Start-Up

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START-UP AND OPERATION

Unit Start-Up

FOR YOUR SAFETY READ BEFORE LIGHTING

!WARNING

Electric shock hazard. Can cause injury or death. Do not use this heater if any part has been under water. Immediately call a qualified service technician to in- spect the furnace and to replace any part of the control system and any gas con- trol which has been under water.

!WARNING

Danger of explosion. Can cause injury or product or property damage. If over- heating occurs or if gas supply fails to shut off, shut off the manual gas valve to the appliance before shutting off electri- cal supply.

!WARNING

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies.

!WARNING

Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly.

BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand, do not try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.

These unit heaters are equipped with an automatic spark ignition system. There is no pilot. In case of a safety shutdown, move thermostat switch to OFF, then return the thermostat switch to HEAT position.

Operation for Honeywell VR8205 Series Gas Valve (Figure 11)

1- STOP! Read the safety information at the beginning of this section.

2- Set thermostat to lowest setting.

1HONEYWELL VR8205 SERIES GAS VALVE

MANIFOLD PRESSURE ADJUSTMENT SCREW

MANI-

FOLD

PRESS-

URE

TAP

ON

OFF

INLET

PRESSURE

TAP

GAS VALVE SHOWN IN OFF POSITION

FIGURE 11

3-Turn off all electrical power to appliance.

4-This appliance is equipped with an ignition device which automatically lights burners. DO NOT attempt to light the burners manually.

5-Turn the manual knob on gas valve clockwise to OFF. Do not force.

6-Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions. If you do not smell gas, go to next step.

7-Turn manual knob on gas valve counterclockwise to ON.

8-Close the unit door.

9-Turn on all electric power to unit.

10- Set thermostat to desired setting.

11- The combustion air blower will start. The burners will light within 40 seconds.

12- If unit does not light first time (gas line not fully purged) it will attempt up to two more ignitions before locking out.

13- If lockout occurs, repeat steps 1 through 10.

14- If appliance still will not operate, follow the instructions “To Turn Off Gas to Unit" and call your service technician or gas supplier.

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Contents TUA*SN,LA,SF Table Of Contents45, 60, and 75 Unit Dimensions Unit Clearances 125 Unit DimensionsShipping Requirements CSA in the USARequirements CSA in Canada Combustion and Ventilation Air Unit Heater InstallationVenting and Combustion Air Inlet Vent and AIR Intake Termination on Single Wall Vent Horizontal Venting GeneralHorizontal Venting-Commercial Recommendations and Requirements. In areas Condensate Drain Through TEE Pipe and Drain LoopGeneral Recommendations RequirementsCondensate Drain Through Vent Termination Vertical Vent Requirements Horizontal Venting Residential InstallationHorizontal Vent Requirements Horizontal Venting-Residential Two PipesHorizontal Venting Concentric Vent Installation Horizontal Venting Concentric Kit ResidentialRemoval Of Unit From Common Vent Electrical Connections Line Voltage Field WiringGas Connection Leak CheckGAS Supply to Unit Heater GAS Supply Connection Operation for Honeywell VR8205 Series Gas Valve Figure Unit Start-UpAttempt to light the burners manually White Rodgers 36E GAS ValveRobertshaw 2000DER GAS Valve To light the burners manuallyOptional Gas Conversion Kit To Turn Off Gas To UnitHeating Sequence of Operation Ignition Control LEDLimit Control Louver Vane AdjustmentCombustion Air Inducer Proving Switch Flame Rollout SwitchGas Flow LP/PROPANE GAS Manifold Pressures in.wg. kPaGas Flow Rate Ft.3/Hr Combustion Air Blower Repair PartsBurners Flue Passageway and Flue BoxTUA45/60/75/100/125SN,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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