1. Nhanganyaya
The Reznor UDXC-45 is a 45,000 BTU natural gas unit heater designed for indoor use in various spaces, including commercial, industrial, and residential garages, workshops, and warehouses. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your heater. Please read all instructions thoroughly before proceeding with installation or operation.
2. Safety Information
YAMBIRO: Kuisa, kugadzirisa, kusandura, sevhisi, kana kugadzirisa zvisina kunaka kunogona kukonzera kukuvara, kukuvara kana kufa. Verenga mirairo yekuisa, kushanda, uye kugadzirisa zvakakwana usati waisa kana kusevhisa mudziyo uyu.
- Kugovera Gasi: Ensure the gas supply is turned off before any installation or maintenance. All gas connections must be leak-tested.
- Kufefetedza Proper venting is critical to prevent carbon monoxide poisoning. Ensure the vertical Category 1 B-vent kit is installed correctly and maintained.
- Mabatirwo emagetsi: All electrical wiring must comply with local codes and be performed by a qualified electrician. Disconnect power before servicing.
- Clearances: Maintain adequate clearances from combustible materials as specified in the installation instructions.
- Professional Installation: Installation and service should be performed by a qualified installer, service agency, or gas supplier.
3. Chigadzirwa Pamusoroview
The Reznor UDXC-45 unit heater is engineered for durability and efficient heating. It features a robust design suitable for demanding environments.

Mufananidzo: Mberi view of the Reznor UDXC-45 unit heater highlighting standard features such as 83% AFUE efficiency and TCORE2 heat exchanger.
Zvinokosha:
- Kuita Kwepamusoro: Rated for 45,000 BTU with an 83% thermal efficiency rating.
- Durable Construction: Features a TCORE2 titanium-stabilized aluminized steel heat exchanger.
- Advanced Ignition: Patented single-burner combustion with multi-try direct spark ignition and time lockout.
- User Interface: Integrated circuit board with a 7-segment display for troubleshooting and status-indicating LED.
- Quiet Operation: Low noise operation with vibration-isolated fan and venter motors.
- Installation Flexibility: Threaded-nut retainers at four suspension points for ceiling or wall mounting (mounting hardware sold separately).
- Maintenance Access: Hinged access door panel with a quarter-turn latch and external gas connection for ease of maintenance.

Image: Visual representation of the heater's attributes including scratch resistance, durable build, modern design, and quiet operation.
4. Zvinotsanangurwa
Detailed technical specifications for the Reznor UDXC-45 unit heater.

Image: Diagram illustrating the physical dimensions of the 45,000 BTU Reznor UDXC-45 heater.
| Tsanangudzo | Value |
|---|---|
| Model Number | UDXC-45 |
| Heat Output | 45,000 British Thermal Units (BTU) |
| Thermal Efficiency | 83% |
| Fuel Type | Natural Gas |
| Heating Method | Kumanikidza Mhepo |
| Indoor / Outdoor Kushandiswa | Indoor |
| Fomu Factor | Ceiling-Mounted |
| Zviyero zveChigadzirwa (D x W x H) | 29.75" x 27" x 13.75" |
| Nhamba Yekumhanya | 2 |
5. Kuiswa
The Reznor UDXC-45 is designed for ceiling or wall mounting. A vertical Category 1 double wall B-vent kit is included for roof venting. Consult a qualified professional for installation to ensure compliance with all local codes and safety standards.
Kukwidza:
- The unit features threaded-nut retainers at four suspension points for secure mounting.
- Mounting hardware is sold separately and should be selected based on the specific installation environment and structural requirements.
- Ensure the mounting location can support the weight of the unit and provides adequate clearance from combustible surfaces.

Image: A Reznor UDXC-45 heater mounted on a ceiling, demonstrating a typical installation in a garage or workshop setting.
Venting:
The included vertical Category 1 double wall B-vent kit is essential for safely expelling combustion byproducts. Follow the kit's instructions and local codes for proper installation.
- The kit typically includes components such as a Reznor CCI Vent Cap, Draft Hood Connector, Straight Pipes (12" and 24" lengths), Adjustable Elbows (60° and 90°), Roof Flashing, and a Storm Collar.
- Ensure all vent connections are sealed properly to prevent leaks.

Image: Various components of a 4-inch diameter double wall B-vent kit, used for vertical venting applications.
6. Kushanda
Once properly installed and connected to the natural gas and electrical supplies, the Reznor UDXC-45 heater is ready for operation. This unit utilizes forced air for efficient heat distribution.
Starting the Heater:
- Ensure the gas supply valve to the heater is open.
- Vhura simba remagetsi kune chikwata.
- Set the thermostat to the desired temperature. The heater will initiate its ignition sequence.
- Observe the status-indicating LED and 7-segment display for operational status.
Kutenderera Kwemhepo:
The low static pressure axial fan and power venting system are designed to reduce heat loss and ensure effective air circulation throughout the heated space.

Image: A diagram showing the air circulation patterns generated by a unit heater, indicating effective heat distribution.
7. Kuchengeta
Regular maintenance ensures the longevity and efficient operation of your Reznor UDXC-45 heater. Always disconnect electrical power and turn off the gas supply before performing any maintenance.
- Kuongorora Kwegore: Have a qualified service technician inspect the heater annually, including the heat exchanger, burner, ignition system, and venting.
- Kuchenesa: Keep the area around the heater clean and free of obstructions. Periodically clean the fan blades and motor to prevent dust buildup.
- Kuongorora Sisitimu Yekubuda Kwemhepo: Inspect the vent system for any signs of corrosion, blockages, or leaks. Ensure the vent cap is clear.
- Heat Exchanger: The TCORE2 titanium-stabilized aluminized steel heat exchanger is designed for durability, but should be inspected for any signs of damage or wear during annual service.
8. Kugadzirisa matambudziko
The Reznor UDXC-45 is equipped with an integrated circuit board and a 7-segment display for diagnostics, along with a status-indicating LED to assist in troubleshooting. Refer to the specific error codes displayed on the 7-segment display for detailed guidance.
Matambudziko Anowanikwa:
- Hapana Kupisa: Check if the thermostat is set correctly, the gas supply is open, and the electrical power is on. Look for error codes on the display.
- Pilot Light/Ignition Failure: The multi-try direct spark ignition system will attempt to light the burner multiple times. If it fails, an error code will be displayed. This may indicate a gas supply issue or a problem with the ignition components.
- Ruzha rusina kujairika: While designed for quiet operation, any new or unusual noises should be investigated. This could indicate a fan issue or other mechanical problem.
- Heater Cycles On/Off Frequently: This could be due to an improperly sized unit, thermostat placement, or airflow restrictions.
Kana paine matambudziko anoramba aripo kana matambudziko akaomarara, taurai nenyanzvi yekubatsira ine hunyanzvi.
9. Warranty uye Tsigiro
For warranty information, please refer to the documentation provided with your Reznor UDXC-45 unit heater or contact the manufacturer directly. Support for this product may also be available through the seller, 1HVAC. Keep your purchase receipt and model number (UDXC-45) handy when contacting support.





