REZNOR UDXC Unit Heaters Installation Guide

: August 26, 2024
: Reznor

Table of Contents

REZNOR UDXC Unit Heaters
Product Specifications
ALLIES IN COMFORT
INSTALLATION & SERVICE FEATURES
Model LDAP High Bay Large Capacity Heater
Electric Unit Heaters
Hydronic Unit Heaters
Model Comparison
Frequently Asked Questions
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

REZNOR UDXC Unit Heaters

Product Specifications

Product Type : Unit Heaters
Available Types: Gas, Electric, Hydronic
Applications: Commercial, Industrial, Residential
Features: High efficiency, Separated combustion, Destratification for improved comfort
Models: UDXC & UBXC Universal Gas Unit Heaters, Model UEZ High Efficiency Condensing Unit Heater, Model LDAP High Bay Large Capacity Heate

Gas, Electric & Hydronic Solutions for Commercial, Industrial & Residential Comfort

ALLIES IN COMFORT

More than just unit heaters with Reznor.
You get the industry’s ﬁ nest equipment backed by an outstanding warranty and 130+ years of heating expertise and innovation. Reznor continues to solve future needs now as industry and customer needs change.
Recent oﬀ erings include gas, electric, and hydronic unit heaters that support sustainability and greenhouse gas reduction. Yet more examples of Reznor’s tradition of developing cutting-edge, high-performing heating products.

Enhancing comfort, well-being, and productivity in buildings and homes with innovative heating solutions

Building occupants, business owners and residential customers get comfort and peace of mind with our cost-effective heating solutions.
Contractors get products that are faster, easier, and safer to install and service leading to more sales and satisfied customers.
Look for Reznor unit heaters in factories, warehouses, greenhouses, water treatment plants, retail shops, automotive facilities, home garages and workspaces, and many more places.

Services: We handle product service requirements through contractors and/or distributors with feedback from local representatives and the factory. Replacement parts are maintained at service centers throughout the country and at manufacturing facilities.

SIGNATURE DESIGN FEATURES

Compact construction to save space in any given application
Distinctive design with removable front face and beveled edge
Three-tone glossy, scratch-resistant paint
Clean metal panels without any visible screws or fasteners
Tooled, rounded, vertical corners (30 to 125) and edges

INSTALLATION & SERVICE FEATURES

Patented single burner combustion system
Hinged service door with 1/4 turn latch
Door safety strap to prevent door drops
External terminal strip for easy 24V wiring of the thermostat
Quick-glance external status LED blinks when service is required
Built-in on/off switch for quick and easy diagnoses
Integrated circuit board with error code display for quick and easy troubleshooting
Vibration/noise isolated fan and venter motors for low noise operation
Full fan guards for added safety

Reznor achieved several ﬁ rsts in the industry starting with the ﬁ rst gas-ﬁ red unit heater in 1920. We were also ﬁ rst to mount our units, oﬀ er high-e ﬃ ciency models, and separated combustion units. Reznor fulﬁ lls all sizes of projects with the ideal blend of value and performance resulting in minimal up-front and operating costs while providing optimum comfort.

Models UDXC & UBXC Universal Gas Unit Heaters

Power-vented low-static axial fan (model UDXC)
High-static blower fan (model UBXC)
14 sizes from 30,000 to 400,000 BTUh optimize cost and capacity
82 to 83% thermal efficiency
Natural gas standard (propane conversion kit available)
External gas connection for easier installation
SThe sealedcontrol compartment houses all electrical components
Field convertible to separated combustion using added kit
TCORE2® titanium-stabilized aluminized-steel heat exchanger
Certiﬁ ed for commercial/industrial heating applications (all UBXC sizes and only UDXC sizes 30 to 400)
Approved use in residential garages and workshops (only UDXC sizes 30 to 125)

FACTORY-INSTALLED OPTIONS

Stainless-steel heat exchanger
Single- or 2-stage gas control

UDXC only

Open drip-proof or totally-enclosed motor
115/1/60 (volts, phase, Hz)

UBXC only

115/1/60, 208/1/60, 230/1/60, 208/3/60, 230/3/60, 460/3/60, or 575/3/60 (volts, phase, Hz)
Various motor, starter, and drive options
Duct ﬂ range*
Inlet blower guard and belt guard*

FIELD-INSTALLED OPTIONS

Vertical louvers and various downturn nozzle options
Manual gas shutoﬀ valve
Various stepdown transformer options
Thermostat options
Multiple unit control (up to ﬁ ve units)
High-elevation pressure switch
Propane conversion and separated-combustion conversion kits
Vent cap (stainless steel available on UDXC only)
Various hanger kits (UDXC only)
Hanger kit for suspension from 1-inch threaded pipe (UBXC only)

Model UEZ High E ﬃ ciency Condensing Unit Heater

Ultimate efficiency, aesthetics, durability, and cleanliness
Lowest electrical usage and clearances on the market
91 to 93% thermal efficiency
Power-vented low-static axial fan
7 sizes from 55,000 to 310,000 BTUh
Natural gas standard (propane conversion kit included)
50 to 60 °F temperature rise range
TCORE3™ 409 stainless steel primary heat exchanger (sizes 130 to 310)
Flow-optimized secondary heat exchanger with MacroChannel® design (sizes 130 to 310)
115/1/60 (volts, phase, Hz)
All sizes certiﬁ ed for commercial/industrial applications
Sizes 55, 85, 110 certiﬁ ed for use in residential garages and workshops

FACTORY-INSTALLED OPTIONS

High-elevation modiﬁ cation
Open drip-proof or totally-enclosed motor

FIELD-INSTALLED OPTIONS

Vertical and horizontal vent assemblies
Vertical louvers and various downturn nozzle options
Manual gas shutoﬀ valve
Hanger kits
Single-stage thermostat
Multiple unit control (up to ﬁ ve units)

Reznor® separated combustion systems enhance space safety.

Separated combustion unit heaters use outside air for combustion to enhance space safety by preventing dirt, lint, dust, or other contaminants within the indoor atmosphere from being burned. This results in optimum and eﬃ cient combustion unaﬀ d by negative building pressure or wind that ected by negative building pressure or wind that can cause nuisance shutdowns. After combustion, can cause nuisance shutdowns. After the air is exhausted b outdoors outdoors..

Model LDAP High Bay Large Capacity Heater

Power-vented high-velocity downﬂ ow heater
3 sizes from 400,000 to 1,200,000 BTUh
83% thermal efficiency
Destratiﬁ cation fan recycles heat back down to the ﬂ or; can be run in summer without heat to create a cooling eﬀ ect
55 °F temperature rise range
TCORE2® heat exchanger
208 or 230 single-phase supply voltage
High-temperature limit switches

FACTORY-INSTALLED OPTIONS

208/1/60 or 230/1/60 (volts, phase, Hz)
Natural gas standard (propane conversion kit available)
Aluminized-steel or 409 stainless-steel heat exchanger
Single- or 2-stage gas control (not available on 800 & 1200)

FIELD-INSTALLED OPTIONS

Vent cap
Vertical louvers and various downturn nozzle options
Manual gas shutoﬀ valve
Thermostats
Vertical and horizontal vent assemblies
Single-stage thermostat
Multiple unit control (up to ﬁ ve units)
Hanger kit for suspension from 1-inch threaded pipe
High-elevation pressure switch

Advantages of destratiﬁ cation – “Free” heat & “Free” cool

In forced air heating applications, warm heated air is thrown to the ﬂ our heating where needed, but over time, the air tends to collect at the ceiling. Destratiﬁ cation means less run time on unit heaters, lower building operating costs, and improved space comfort.
Instead of heat remaining at the ceiling or escaping through the roof, a monitor (separate from wall wall-mounted thermostat) on Model LDAP senses the buildup of heat at the ceiling. This monitor triggers fans at a slower speed to destratify air and send “free” heat back to the ﬂ our.

Using fan(s) in the summer can improve working conditions by alleviating stagnant air conditions and creating a cooling eﬀ ect for occupants.

Electric Unit Heaters

Reznor EUH series electric unit heaters support sustainability and greenhouse gas reduction when paired with zero-emission, naturally generated electricity. Model EUH offers a wide variety of capacities including multi-stage units to enable cost-saving operations and lower up-front costs. EUH heaters allow building owners to achieve their decarbonization goals with an industry-best lead time.

Electric resistive, low-static axial fan unit heater
Enables sustainability when supplied with naturally generated electricity
Solution to meet building decarbonization goals
8 sizes from 3 to 30 kW
Multi-voltage/phase-capable models reduce inventory and simplify product selection
Multiple control options including 2a 4V thermostat, BMS, or even a simple wall switch
Multiple mounting options including wall hangers, 2 downrod ceiling hangers, or low clearance
Automatic resetting hof igh-temperature limit
Enhanced safety with air-proving switch protection
Standard two-point suspension and wall hanger on all unit sizes
Simple fan on control without added relays
Readily available repair parts since common parts with Reznor gas-fired unit heaters
For indoor spaces like entryways, stairwells, hallways; also for heat/freeze protection
ETL certifi ed to UL Standard 2021, Fixed and Location-Dedicated Electric Room Heaters

FACTORY-INSTALLED OPTIONS

208/1, 208/3, 240/1, 240/3, 277/1, 480/3, or 600/3* (volts, phase, Hz)
Lockable, non-fused disconnect switch
- Some voltages are not available on all unit sizes.

FIELD-INSTALLED OPTIONS

Multiple unit control
Single-stage, 2-stage, or BACnet®-capable thermostats
Locking covers for thermostats
Remote ON/OFF switch
Hanger kit for 1-inch threaded pipe
Angle brackets for low-ceiling mounting

Hydronic Unit Heaters

Model UWS Hot Water Heaters
Model UWS hot water unit heaters oﬀ er ground-breaking performance, reliability, and ﬂ exibility packaged in an industry-leading commercial design. An eﬀ ective alternative to gas heating, UWS hydronic heaters improve building sustainability and reducethe carbon footprint when paired with ahigh-efficiencyy boiler or a hot water heat pump.

Low-static axial fan hot water unit heater
9 sizes from 10,000 to 191,000 BTUh
Requires hot water for supplied heating energy source
Industry’s best heat exchanger with copper tube/aluminum ﬁ n coil for medium temperature water applications
Unique ﬁ n spacing optimizes coil efficiency, reduces maintenance, maximizes ﬂ ow area, and minimizes contaminants
Exclusive, front-facing design with water connections on back of the unit hiding unsightly connections
Designed for 140 °F entering water temperature to support high-efficiency hot water heating systems
Leading airﬂ ow directional control options from horizontal to vertical and all angles in between
Multi-speed fan for tailored air delivery and quiet operation
115/1/60 (voltage/phase/Hz)
Two-point (horizontal discharge) or four-point (vertical discharge) suspension standard on all unit sizes

FIELD-INSTALLED OPTIONS

Vertical louvers and various downturn nozzle options
Single-stage thermostat
Remote ON/OFF switch

MORE THAN UNIT HEATERS
Look to Reznor for heating all your spaces, whether industrial, commercial, or residential. Choose from our comprehensive selection of gas-ﬁ red, electric, or hydronic options.
Our unit heaters are second to none, but that’s not all we focused on. Reznor offers a complete line of HVAC solutions to meet all your heating, cooling, and makeup air needs. Please explore our full product line on ReznorHVAC.com.

Reznor also oﬀ ers

Destratiﬁ cation fans
Radiant heaters
Duct furnaces
Air curtains
Air handlers
Wall-mounted heaters
Ceiling-mounted heaters
Electric baseboard heaters

Model Comparison

MODEL	UDXC	UBXC	UEZ	LDAP	EUH	UWS
Type	Gas-Fired (Natural Gas/Propane)	Electric	Hydronic
Heating Range (MBTUh)	30-400	55-310	400-1200	10-103 (3-30 kW)	10-191
Thermal Eﬃciency (%)	82-83	91-93	83	100	N/A
Axial Propeller Fan	Yes	No	Yes	Destratification Fan	Yes	Yes
Ductable Blower	No	Yes	No	No	No	No
Separated Combustion	Yes-Field Convertible	Yes	No	No	No

Call your Reznor® Rep to ﬁ and a product that works for you at 800.695.1901. Visit reznorhvac.com for more information on the Reznor® product line.
© Nortek Global HVAC LLC 2024. All Rights Reserved.

Frequently Asked Questions

Q: Can I install the unit heaters myself?
- A: It is recommended to have a professional contractor handle the installation to ensure the safety and proper functioning of the unit heaters.
Q: How often should I service the unit heaters?
- A: Regular servicing is essential to maintain efficiency and prolong the lifespan of the unit heaters. Follow the manufacturer’s guidelines for service intervals.
Q: Are these unit heaters suitable for residential use?
- A: Yes, Reznor unit heaters are designed to provide comfort in residential settings along with commercial and industrial spaces.