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Trane industrial heater unit
Propeller Fan Gas Unit Heaters (model GA)
Units are completely factory assembled, piped, wired, and test fired. All units are AGA Certified,
80 percent efficient and conform with the latest ANSI Standards for safe and efficient performance.
Units are provided with two-point suspension hangers on propeller fan unit heaters and with fourpoint
suspension hangers on centrifugal fan unit heaters. Units are available for operation on either
Casings are die-formed, 20-gauge galvanized steel and finished in baked enamel. The bottom panel
is easily removed to provide service access to the burners, pilot and orifice. All units provided with
independently adjustable horizontal louvers with stops to prevent total closure.
Standard heat exchanger construction consists of seam welded 20-gauge aluminized steel tubes
and 18-gauge aluminized steel headers.
Burners are die-formed, corrosion resistant aluminized steel, with stainless steel port protectors.
Port protectors prevent scale or foreign matter from obstructing the burner ports. Burners
individually removable for ease of inspection and servicing. Each burner is provided with an
individually adjustable, manually rotated air shutter adjustment.
Propeller fan blades are constructed of aluminum with an aerodynamic contour.
All fans are dynamically balanced for quiet, efficient operation and supplied with a protective type
fan guard. Rubber-in-shear isolators provide isolation between the fan/motor combination and the
Centrifugal fan is belt driven with adjustable pitch motor sheave. Motor and fan are dynamically
Standard motors are 115V, 60 Hz, single phase, open drip-proof with built-in thermal overload
protection. Optional 230/60/1 motors are available on all units. Optional 208, 230, 460/60/3 motors
are available on 125 through 400 MBh units.
All motors are 115V, 60 Hz, single-phase open drip-proof with built-in thermal overload protection
and permanently lubricated bearings.
A factory installed junction box is provided for all power connections. Standard units are provided
with a 24V combination single-stage redundant gas valve, consisting of a combination pilot
solenoid valve, automatic electric gas valve, pilot filter, pressure regulator, pilot adjustment and
manual shutoff. A flue vent fan relay and combustion air proving switch is also provided as
standard. Standard equipment includes spark-ignited intermittent pilot system with electronic
flame supervision. A 24V control transformer, high limit and fan time delay relay are provided. The
fan time delay relay delays the fan start until the heat exchanger reaches a predetermined
temperature. It also allows the fan to operate after burner shutdown, removing residual heat from
Electronic Modulating, 4 20 mA/0 10Vdc Input
Provides modulated heat output. Ignition is at full fire (100 percent input), and modulates the gas
input from 100 percent to 40 percent rated input.
The modulating gas valve shall operate in response to a 4 20 mA or a 0 10 Vdc input from an
Flue vent fan provides power venting. Provided factory assembled to a sealed flue collection
chamber. The flue vent fan is activated in response to a low voltage (24V) single-stage thermostat.
Note: The thermostat is not included with the gas control option).
A combustion air pressure switch is provided as standard to verify proper powered vent flow prior
to allowing the gas valve to operate.
Provides two stages of heat. Ignition is at low fire (50 percent of the furnaces rated input). Requires
the use of a two-stage thermostat.
Heat exchanger tubes and headers are seam welded 20-gauge Type 409 stainless steel.
Heat exchanger tubes and headers are seam welded 20-gauge Type 321 stainless steel.
Type 409 Stainless Steel Burners
Type 409 Stainless Steel Draft Diverter
Orifices for elevations over 2000 feet
(Centrifugal fan units only) Provided in lieu of louvers on units for use with field ductwork.
OSHA fan guards are available as a factory installed or field installed option.
LP (Propane) to Natural Gas Conversion Package
High Gas Line Pressure Regulator (Natural gas units only)
Reduces main gas line pressure to a minimum of seven-inches wc (water column). Pressure at the
jobsite must be specified. The regulator is selected to accommodate that specific pressure.
Low voltage room thermostat, single-stage.
Low voltage room thermostat, single-stage with summer/winter switch.
Low voltage duct thermostat, single-stage.
Low voltage room thermostat, two-stage.
Low voltage duct thermostat, two-stage.
Universal tamperproof guard for all room thermostats.
Kit includes 5 cap with special attached non-recirculation disc, special 8 cap with 5 hole and
Horizontal Concentric Vent Kit
Kit includes 5 cap with special attached non-recirculation disc, inlet air screen and concentric vent
