Reznor EUH Installation, Operation And Maintenance Manual

Reznor EUH Installation, Operation And Maintenance Manual

Electric unit heater

Advertisement

Quick Links

ELECTRIC UNIT HEATER INSTALLATION, OPERATION,
AND MAINTENANCE
• Read all instructions before using the heater.
• Failure to follow safety warnings exactly could result in serious injury, death, or property
damage.
• Improper installation, adjustment, alteration, service, or maintenance can cause serious injury,
death, or property damage.
• Installation and service must be performed by a qualified technician.
• Be sure to read and understand the installation, operation, and service instructions in this
manual.
• This heater has hot parts inside. Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
• This heater is hot when in use. To avoid burns, do not let bare skin touch hot surfaces.
• Do not operate any heater after it malfunctions. Disconnect power at the service panel and
have the heater inspected by a reputable electrician before reusing.
• Do not use outdoors.
• Do not insert or allow foreign objects to enter any heater opening as this may cause electrical
shock, fire, or damage to the heater.
• To prevent a possible fire, do not block air intakes or exhaust in any way whatsoever.
• Use this heater only as recommended by the manufacturer. Any other use may cause electrical
shock, fire, or damage to the heater.
IMPORTANT INSTRUCTIONS
MODEL EUH
 ⚠ DANGER ⚠ 
SAVE THESE INSTRUCTIONS
Revision: EUH-IOM (01-24) 1042454-A
Revision: EUH-IOM (09-23) 1042454-0

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the EUH and is the answer not in the manual?

Questions and answers

Summary of Contents for Reznor EUH

  • Page 1 Revision: EUH-IOM (01-24) 1042454-A Revision: EUH-IOM (09-23) 1042454-0 ELECTRIC UNIT HEATER INSTALLATION, OPERATION, AND MAINTENANCE MODEL EUH  ⚠ DANGER ⚠  • Read all instructions before using the heater. • Failure to follow safety warnings exactly could result in serious injury, death, or property damage.
  • Page 2: Table Of Contents

    INSTALLATION RECORD (TO BE COMPLETED BY INSTALLER) ........24 EUH-IOM (01-24) 1042454-A...
  • Page 3: General Information

    • To prevent damage to the unit or to its internal components, it is recommended that two wrenches be used when loosening or tightening nuts. Do not over tighten! EUH-IOM (01-24) 1042454-A...
  • Page 4: Warranty

    15–20 feet (4 .6–6 .1 meters) . EUH-IOM (01-24) 1042454-A...
  • Page 5: Heater Throw

    33 (10 .0) 27 (8 .2) 31 (9 .4) 34 (10 .4) Downward louver angle 36° 45° 36° 12 (3 .7) 18 (5 .5) 16 (4 .9) 14 (4 .3) — 25 (7 .6) Downward louver angle 45° Figure EUH-IOM (01-24) 1042454-A...
  • Page 6: Dimensions

    3, 5, 7, 10 (388) (593) (347) (365) (711) (531) (217) (411) 25/32 (20) 21-1/8 28-5/32 19-1/2 19-11/32 33-13/32 24-3/4 10-9/16 21-7/32 15, 20, 25, 30 (537) (716) (496) (492) (849) (629) (268) (539) Heater suspension points (3/8-16 FEM) . EUH-IOM (01-24) 1042454-A...
  • Page 7: Weights

    ‰ The wall-mounting bracket is shipped with the unit . If the unit is to be mounted on a wall, ensure that the Suspension of Heater Using Wall-Mounting Bracket required field-supplied hardware is available (refer to section) . EUH-IOM (01-24) 1042454-A...
  • Page 8: Heater Suspension

    Option CK8 allows the heater to be suspended using two swivel connectors connected to 1-inch pipe . Attach the swivel connectors at the 3/8-16 threaded nut retainers . Ensure that the swivel connectors are locked to the heater as shown in Figure Figure 3. Option CK8 Two-Point Suspension Kit EUH-IOM (01-24) 1042454-A...
  • Page 9: Suspension Of Heater Using Field-Supplied Threaded Rods

    Figure 5. Heater Suspension Using Wall-Mounting Bracket Suspension of Heater Using Option CK22 Ceiling Suspension Kit Option CK22 allows the heater to be installed 1 inch from the ceiling without hanger rods . Refer to the installation instructions provided with the kit . EUH-IOM (01-24) 1042454-A...
  • Page 10: Electrical Connections

    6) terminals . (1) Loosen terminal screws T1, T2, and T3 on 3-pole contactor (see (2) Disconnect black wires from T1 and T2 terminals and connect them to T3 terminal . (3) Tighten all terminal screws . EUH-IOM (01-24) 1042454-A...
  • Page 11 TERMINAL BLOCK TERMINAL STRIP TRANSFORMER CONTROL RELAY 10kW, 480V SHOWN PRESSURE TERMINAL SWITCH LIMIT SWITCH TERMINAL BLOCK CONTROL RELAY 3-POLE CONTACTOR 2-POLE CONTACTOR TERMINAL STRIP TIME DELAY TRANSFORMER RELAY 20kW, 240V SHOWN Figure 6. Typical Control Panels EUH-IOM (01-24) 1042454-A...
  • Page 12: Control Connections

    • If the installation features a heater and an H series Huracan destratification fan controlled by a single two-stage thermostat, ensure that the wiring is in accordance with the wiring diagram shown in Figure Figure 8. Heater and Destratification Fan Wiring Diagram EUH-IOM (01-24) 1042454-A...
  • Page 13: Controls

    . If control of additional heaters is desired (up to five total), option CL32, which is the relay assembly only, must be added to each additional heater . The option packages are shipped separately and include complete instructions on installation and wiring . EUH-IOM (01-24) 1042454-A...
  • Page 14: Operation

    • If any of the original wire supplied with the unit must be replaced, the wiring material must have a temperature rating of at least 105°C. • Ensure that all wiring is in accordance with the wiring diagram provided with the unit. • If replacement parts are required, use only factory-authorized parts. EUH-IOM (01-24) 1042454-A...
  • Page 15: Service Checklist

    30 inch-pounds . Repeat until assembly is positioned properly . 9 . Reconnect fan motor wires in accordance with wiring diagram . 10 . Install access panel . 11 . Turn ON electric power to unit and check for proper operation . EUH-IOM (01-24) 1042454-A...
  • Page 16: Troubleshooting

    1 . Low or high voltage supply Correct electric supply out on overload 2 . Defective capacitor Replace capacitor 3 . Defective fan motor Replace fan motor 4 . Poor airflow Clean motor, fan, and fan guard Adjust louvers EUH-IOM (01-24) 1042454-A...
  • Page 17: Appendix: Wiring Diagrams

    APPENDIX: WIRING DIAGRAMS Wiring Diagram—3kW, 5kW, 7kW, 10kW, AK7 EUH-IOM (01-24) 1042454-A...
  • Page 18 APPENDIX: WIRING DIAGRAMS—CONTINUED Wiring Diagram—3kW, 5kW, 7kW, 10kW, AK44 EUH-IOM (01-24) 1042454-A...
  • Page 19 Wiring Diagram—15kW, 20kW, 25kW, 30kW, AK7 EUH-IOM (01-24) 1042454-A...
  • Page 20 APPENDIX: WIRING DIAGRAMS—CONTINUED Wiring Diagram—15kW, AK20 EUH-IOM (01-24) 1042454-A...
  • Page 21 Wiring Diagram—20kW, AK6 EUH-IOM (01-24) 1042454-A...
  • Page 22 NOTES EUH-IOM (01-24) 1042454-A...
  • Page 23 NOTES EUH-IOM (01-24) 1042454-A...
  • Page 24: Installation Record (To Be Completed By Installer)

    Company Address Phone No. For more information on Reznor HVAC products: • Contact your local Reznor representative at 1-800-695-1901 • Refer to the technical specifications, manuals, and consumer materials found at www.reznorhvac.com Specifications and illustrations subject to change without notice or incurring obligations .

This manual is also suitable for:

Euh-iom 1042454-aEuh-iom 1042454-0

Table of Contents