Filter
Top Products
UH-PRC002-EN64
Mechanical
Specifications
Separated Combustion Duct
Furnaces
General
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 four-point suspension hangers
on centrifugal fan unit heaters. Units are
available for operation on either natural
or LP (propane) gas. Standard terms and
conditions apply.
Casing
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.
Heat Exchanger
Standard heat exchanger construction
consists of seam welded 20-gauge
aluminized steel tubes and 18-gauge
aluminized steel headers.
Burners
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.
Controls
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
the heat exchanger.
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 external DDC control.
Flue Vent Fan
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.
Factory Installed Options
Two-Stage Gas Valve
Provides two stages of heat. Ignition is at
low fire (50 percent of the furnace’s rated
input). Requires the use of a two-stage
thermostat.
Heat Exchanger Options
Type 409 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gauge Type 409
stainless steel.
Type 321 Stainless Steel
Heat exchanger tubes and headers are
seam welded 20-gauge Type 321
stainless steel.
Additional Options
Type 409 Stainless Steel Burners
Type 409 Stainless Steel Draft Diverter
Totally Enclosed Motor (Centrifugal fan
units only)
Orifices for elevations over 2000 feet
Summer/Winter Switch
Vertical Louvers
Duct Discharge Flange
(Centrifugal fan units only) Provided in
lieu of louvers on units for use with field
ductwork.
Field Installed Accessories
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 W.C. Pressure at the jobsite
must be specified. The regulator is
selected to accommodate that specific
pressure.
Thermostats
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.
Discharge Nozzles
Y Splitter
30° Downward
60° Downward
90° Downward
Concentric Vent Terminals
Vertical Concentric Vent Kit
Kit includes 5” cap with special attached
non-recirculation disc, special 8” cap
with 5” hole and concentric vent box.
Horizontal Concentric Vent Kit
Kit includes 5” cap with special attached
non-recirculation disc, inlet air screen
and concentric vent box.