TIR

TIR

Rooftop-Mounted Indirect Fired Product

The Temprite outdoor TIR unit offers complete flexibility to the engineer and owner to meet any rooftop-mounted design need. Controls can be set up for space heating, make-up air or a combination of both. DX or chilled water cooling coils are optional. The standard indirect fired space heater is a horizontal curb-mounted unit. CFM range is 4,000 to 46,000.
Optional cooling capacities range from 5 to 180 tons and heating output capacities range from 250,000 to 2,500,000 BTUH

Learn More about Indirect Fired Products

Indirect Fired

Features

  • Basic unit configuration is for heating and cabinet is designed for either horizontal or down discharge supply air.
  • TIR units are "modular" in concept. Units can be configured for heating and ventilation, heating and cooling, 100 percent outside air, or mixed air.
  • Optional DX or CW cooling section includes pitched double outlet drain pan of stainless steel.
  • Mixing box module includes integral filter racks for up to 2 inch thick filers.
  • Filter-only section includes racks for up to 2 inch thick pleated filters.
  • Gas burner, induced draft fan, and controls are enclosed in weather resistant enclosures with hinged access doors.
  • Factory designed and manufactured inlet hood option with bird screen.
  • Factory designed and manufactured roof curb is designed with unit overhang to minimize and protect roof penetration.
  • Indirect fired heater is a two section, four pass, configuration. Both inlet sections are manufactured with series 400 stainless steel.
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Outside Air Intake Hood

Limit Entrainment of Rain or Critters

The optional TIR intake hood is designed for air intake velocities of under 450 FPM in order to limit the possibility of rain entering the space. In addition, the intake hood comes with a built-in bird screen to help keep unwanted visitors out of the building. The hood can even include a filter rack for washable filters to preclean the air before even entering the unit.

Inlet Hood2 Cropped
Drum and Tube Heat Exchanger

4-Pass Drum and Tube Heat Exchanger

Maximum Heat Transfer Surface Area

The Temprite TIR system 4-pass heat exchanger consists of a large primary section and a secondary section of multiple tubes depending on the capacity you require. The sections are connected via collector boxes at the ends of each pass. The primary section of the heat exchanger is manufactured of 400 series stainless steel and secondary section is manufactured of mild steel standard or 400 series stainless steel optional. The primary section is rolled, and seam welded in the Mestex factory in Dallas. All seams are continuous welded in the factory and tested for leaks. The primary section has a pressure relief and visual inspection port. The secondary section includes a condensation drain port.

V-Bank Filters Optional

Clean Filtered Air

The Temprite TIR has the option of a V-bank filter bank for clean tempered air entering the space. The filter bank has racks that will accommodate 2" filters with up to MERV13 ratings.

partial vbank
induced draft fan

Induced Draft Fan

Venting Combustion Products to the Atmosphere

A direct drive motor spins the fan in the induced draft assembly and vents the combustion products to the atmosphere. The entire assembly (less the moror itself) is manufactured in the Dallas factory. The fan is of a non-clogging, radial blade design. The assembly also includes a manual damper with locking quadrant so that it can be adjusted during the startup process to assure proper induction.

Powered Combustion Burner

Efficient Air/Fuel Mixing and Combustion

The combustion burner has an integral blower and motor, air proving switch, and pilot assembly. There is also a combustion air damper that is interlocked with the gas control valve in order to produce the proper air/fuel mixture throughout the operating range.

power burner
HeatExchanger_0134

Factory Assembled Gas Train

Tested and Ready to Fire

The factory wired and assembled gas train consists of low pressure gas regulator, motorized gas control valve, main gas shutoff valve, pilot pressure regulator, and pilot gas shutoff valve.The burner controls can be On/Off, Hi/Low/Off, or Fully Modulating.

DX or Chilled Water Coil Option

Cooling Plus Efficient Heat

Temprite TIR units offer great versatility in terms of application. In cases where you need to provide cooling in addition to heating in a large make-up air unit (up to 50,000 cfm) the TIR can be ordered with a coil module. The 36" deep coil module is located downstream of the filter section and upstream of the fan. This configuration provides sufficient space for a 304 stainless steel drain pan and for more fully developed flow over the coil. The coil section is insulated to minimize temperature loss.

Coil Compartment