Product Overview

ManualsBrandsReznor ManualsHeating SuppliesPower Vented Gas Fired Unit Heater - 175,000 BTU

TECHNICAL

SPECIFICATIONS

• Sizes 30-400 MBTUH certiﬁed for commercial/industrial

heating application

• Sizes 30-125 MBTUH carry an additional approval for use

in residential garage/workshop heating applications

• 50-60°F Rise range

• Integrated circuit board with 7 segment display

• External status indicating LED

• Hinged door with ¼ turn latch

• Improved cabinet design with removeable front face and

two tone white and black powder paint.

• Tcore2 titanium stabilized aluminized steel heat exchanger

• Patented single burner combustion system including a

one-piece burner assembly

• 115V, 1 phase, 60 Hz supply voltage

• 115 Volt open fan motor with internal overload protection

• Transformer for 24-volt controls

• Multi-try direct spark ignition with timed lockout

• Fan relay (included on the circuit board)

• Single-stage natural gas valve (ﬁeld adjustable for

operation to 10,000 ft. elevation)

• Vibration/noise isolated fan and venter motors ~ designed

for low noise operation

• 2-pt and 4-pt Suspension ~ standard on all sizes

• External terminal strip for 24-volt wiring

• External gas pipe connection

• Full fan guard

• Single-stage propane gas valve (ﬁeld adjustable for

operation to 10,000 ft.)

• Two-stage gas valve (sizes 60-400)

• 409 or 316 stainless steel heat exchangers

• Totally enclosed fan motor (sizes 30-400)

• Vent cap

• Thermostat

• Integrated vertical louvers

• Integrated 30° & 60° downturn nozzles

• Gas conversion kits (natural and propane)

• Primary/secondary controls for zoning up to six units

• Ceiling suspension kit - Sizes 30-125

• Hanger kits for 1” pipe

• Stepdown transformer (for 208/115, 230/115 or 460/115

supply voltage)

• Manual shutoff valves

UDX Series

Reznor® Model UDX gas-ﬁred unit heaters are available in 14 sizes

ranging from 30,000 to 400,000 BTUH gas input. Model UDX heaters

are approved for installation in the United States and Canada by ETL.

Each size cabinet is easily suspended from either 2 or 4 suspension

points. Or, an optional hanger kit for Sizes 30-125 allows for ceiling

mounting. The low voltage terminal strip on the outside of the cabinet

makes connecting control wiring easy with no panels to remove. The

addition of a “G” terminal to the strip, along with the new design of the

circuit board, allows for fan only operation (without adding relays).

Reznor model UDX unit heaters feature a two-tone black and white powder

coated, scratch-resistant paint scheme. Each unit has clean rounded

corners and edges with no visible screws or fasteners. Model UDX unit

heaters provide the same superior performance customers have relied on

for more than 100 years along with added features that make servicing

the unit easier, installation safer and improve monitoring capabilities.

FEATURES and BENEFITS

OPTIONAL FEATURES

Power Vented, Low Static Axial Fan

Commercial/Industrial Unit Heaters

82 - 83% Thermal Efﬁciency

Summary of content (8 pages)

PAGE 1
TECHNICAL SPECIFICATIONS UDX Series Power Vented, Low Static Axial Fan Commercial/Industrial Unit Heaters 82 - 83% Thermal Efﬁciency FEATURES and BENEFITS • Sizes 30-400 MBTUH certiﬁed for commercial/industrial heating application • Sizes 30-125 MBTUH carry an additional approval for use in residential garage/workshop heating applications • 50-60°F Rise range • Integrated circuit board with 7 segment display • External status indicating LED • Hinged door with ¼ turn latch • Improved cabinet design with re
PAGE 2
MODEL IDENTIFICATION CODES U D X 150 Unit Heater D - 82-83% Axial Fan B - 82-83% Blower Fan E - 93% Axial X - Power Vented Z - Seperated Combustion 2 Input Heating Capacity 30 45 60 75 100 125 150 175 200 225 250 300 350 400
PAGE 3
TECHNICAL DATA Size 30 45 60 75 100 125 BTUH 30,000 45,000 60,000 75,000 105,000 120,000 kw/h 8.8 13.2 17.6 22.0 30.8 35.2 82 83 83 83 83 83 Output Heating Capacity C BTUH 24,600 37,350 49,800 62,250 87,150 99,600 kw/h 7.2 11.0 14.6 18.3 25.6 29.2 Gas Connection (inches) D Natural 1/2 1/2 1/2 1/2 1/2 1/2 Propane 1/2 1/2 1/2 1/2 1/2 1/2 4 4 4 4 4 4 Control Amps (24 volt) 1.0 1.0 1.0 1.0 1.0 1.0 Full Load Amps (115 volt) 1.9 2.4 2.4 3.
PAGE 4
TECHNICAL DATA (Continued) Size 150 175 200 225 250 300 350 400 BTUH 150,000 175,000 200,000 225,000 250,000 300,000 350,000 400,000 kw/h 43.9 51.2 58.6 65.9 73.2 87.8 102.5 117.1 83 83 83 83 83 83 83 83 Output Heating Capacity C BTUH 124,500 145,250 166,000 186,750 207,500 249,000 290,500 332,000 kw/h 36.4 42.5 48.6 54.7 60.8 72.9 85.1 97.
PAGE 5
DIMENSIONS Size (in) A 30, 45 13 3/4 60 75 100 125 B C 10 16 3/4 26 1/8 34 1/8 41 30 Size (mm) A B C 30,45 349 38 3/16 F 13 13/16 27 5/8 25 9/16 34 9/32 16 23 40 254 J E F M N P Q R 3 11/32 17 3/8 1 9/16 4 9/32 13 9 9/16 8 29/32 8 5/16 5 3/8 9 11 13/16 H J 152 S T 3 3/4 6 5 15/16 13 1/16 G K 3 1/2 17 1/16 8 1/2 756 60 8 11/16 9 5/8 48 29/32 D H 15 5/16 48 7/16 22 G 6 27 21 150, 175, 200 225, 250 300, 350, 400 E 29 3/4 13 27 24 3/4 20 1/8 D
PAGE 6
THROW/FLOOR COVERAGE H Height measured from the ﬂoor to the bottom of the unit heater. Point where heated air from the heater reaches the ﬂoor. Y Point where heated air tends to rise from the ﬂoor. Z Point where the air velocity drops below 50 feet per minute (254 mm/sec).
PAGE 7
GENERAL INFORMATION WARNING: Gas-ﬁred appliances are not designed for use in hazardous atmospheres containing ﬂammable vapors or combustible dust, or atmospheres containing chlorinated or halogenated hydrocarbons. Installations in public garages or airplane hangars are permitted when in accordance with ANSI Z223.1 and NFPA 54 codes or CAN1-B149 and enforcing authorities. FOR YOUR SAFETY What to do if you smell gas: • • • • Do not try to light any appliance.
PAGE 8
For complete catalog information including submittals, energy calculations, dimension drawings, and more go to www.ReznorHVAC.com or call 800-695-1901. Note: In keeping with our policy of continuous product improvement, we reserve the right to alter, at any time, the design, construction, dimensions, weights, etc., of equipment information shown here. © 2021 Nortek Global HVAC, LLC. Reznor is a registered trademark of Nortek Global HVAC, LLC.