Technical data

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DESCRIPTION
The INFRA-REZ
®
heater Model TR tubular radiant heaters
are available in BTUH inputs of 50,000 to 200,000 and in
tube lengths from 20 to 70 feet (see the Technical Data Table
for BTUH/length combinations). All sizes are available for use
with natural gas; optional propane gas operation is available on
units with BTUH input from 50,0000 through 150,000. Model
TR heaters provide full input rate heating capacity to 2,000 feet
elevation. High altitude, full input rate is available on all sizes
for elevations to 6,000 ft. and to 8,000 ft. for all units with BTUH
input from 50,000 through 175,000. INFRA-REZ
®
tubular radi-
ant heaters are engineered to provide quiet, reliable, energy-
efficient, comfort level heating for both spot and space applica-
tions.
The INFRA-REZ
®
heater is designed with a burner/control
box housing a power burner that fires into a 4” diameter tube,
20 to 70 feet in length. The burner is equipped with a blower
for supplying combustion air and a spark-to-pilot-to-main
burner ignition system. Controls include a redundant single-
stage combination gas valve, a post purge relay, and a pres-
sure switch to verify combustion air flow. A safety interlock
switch prevents operation of the heater when the burner/con-
trol box service door is open.
The highly emissive tubes are in 10-foot sections with each
section having a polished reflector. The tube attached to the
burner is the combustion chamber, center sections are heat
exchanger tubes, and the exhaust end tube is the tail pipe.
The standard configuration is straight, but optional “L” shaped,
“U” shaped and 5-foot straight heat exchanger tubes are avail-
able to change the configuration to adapt to various applica-
tions. A tubular system including an optional “U” tube pro-
vides the best balance of radiant emission over the length of
any system. For maximum efficiency, the exhaust end of all
systems is equipped with an aluminized steel turbulator strip.
Combustion air can either come from the heated space or be
piped from the outside. Outside combustion air should be
supplied (1) if the building atmosphere has negative pres-
sure; (2) if the building atmosphere is dirty or dusty; (3) if the
building atmosphere contains substances that will cause toxic
gas when combined with flame or flue products; or (4) if the
heater is being installed in a tightly closed room that does not
provide required air for combustion.
Venting may be either vertical or horizontal. Dual venting of
two units is permissible when using a Reznor Optional Dual
Vent Kit.
The INFRA-REZ
®
tubular heater systems are shipped in modu-
lar packages requiring field assembly and installation. Stan-
dard features, such as built-in hangers for chain suspension,
slip-fit tube connections (U.S. Patent No. 5,460,415), and ter-
minal board thermostat connection, are designed to facilitate
installation.
These heaters are approved for use in The United States and
Canada by the Canadian Standards Association (CSA). Reznor
provides a five-year limited warranty on the burner and an ten-
year limited warranty on all tubes.
STANDARD FEATURES
• Natural gas operation
• Full input rate for elevations to 2,000 ft. - Model TR
• 115/1 supply voltage
• 24-volt controls
• Spark-ignited, intermittent safety pilot with electronic flame
supervision
• Redundant single-stage combination gas valve
• Post purge
• Differential air pressure switch to verify combustion air flow
• Burner-on indicator light
• Sight glass for burner and pilot flame observation
• Terminal board connection for thermostat
• Grounded, plug-in cord for 115 VAC
• Service door with safety interlock switch
• 14-gauge aluminized steel combustion chamber (10 ft.
length)
• High emissivity radiant tubes, 116-gauge HRS (10 ft. lengths)
• Slip-fit tube connections (U.S. Patent No. 5,460,415)
• Built-in suspension hangers
• Polished reflectors (10 ft. lengths)
• Aluminized steel flue gas turbulators for maximum efficiency
• Indoor or outdoor combustion air capability
• Horizontal or vertical venting
• Vent Cap (standard on Canadian units only)
TR Gas-Fired Tubular Radiant, Low Intensity
Heater for Indoor Commercial-Industrial Use
NOTE: Not approved for residential use.
Model TR illustrating many
standard features.
Polished reflector
Indoor and outdoor
combustion air
capability
Terminal board
connection for
thermostat
Service door with
safety interlock
switch
Grounded, plug
in cord for 115
volt VAC
Burner-on
indicator
light
24 volt controls
Spark-ignited
intermittent safety pilot
with electronic flame
supervision
Differential air
pressure switch to
verify combustion
air flow
C E R T I F I E D