HAVACO ERH Electric Duct Heaters User Manual

June 4, 2024
HAVACO

HAVACO ERH Electric Duct Heaters LOGO

HAVACO ERH Electric Duct Heaters

HAVACO ERH Electric Duct Heaters PRODUCT

DESCRIPTION

  • Electric heaters are designed to heat clean air in ventilation systems.
  • Casing is made from aluzinc coated steel which is high temperature proof.
  • Heating elements tube is made from stainless steel AISI 304.
Marking NI/NV/NIS aaabb/cc/xF
  • aaa:Duct width mm
  • bb:uct height mm
  • cc: Power ratio 03 x 100 = 300
  • Wx:  Phases 1~230V, 2~400V, 3~400V
In heaters are installed 2 protection thermostats, screw terminals for

easy connection.

  • Casing is with rubber seals for duct connection.
  • Heaters can be installed vertically or horizontally.
  • Maximum output air temperature 50 °C.
NI/NV/NIS

With integrated control

NI

Internal temperature setpoint

NV

External temperature setpoint

NIS

External signal (0-10V)

TECHNICAL DATA

  • All heaters are with 2 protection thermostats.
  • Automatic reset switch off temperature 50 °C.
  • Manual reset  cut off temperature 100 °C.
  • For controlling heaters without integrated control, external electric heating controller is needed.
  • Protection class IP 44.

TRANSPORTING

All products are packed by producer for normal transporting conditions.

  • For unloading and storing use proper lifter to prevent product damage.
  • Do not lift product by power supply cable, connection box.
  • Avoid impacts and impact loads.
  • Until installation store products in dry place: Humidity 70% (20°C), temperature 5-40°C.
  • Avoid long term storing. It is not recommended to store products more than 1 year.

INSTALLATION

  • Heater can be installed in any position (see picture) except electrical connection box downward.
  • If heater is installed in such way that can be accidental contact with heating elements, protective grill must be installed.
  • Air flow through heater must be not less than 1,5 m/s.
  • Heaters can’t be installed in explosive and aggressive atmosphere.
  • Heaters can be used only for clean air heating.
  • Heaters intended for inside installation.

ELECTRICAL CONNECTION

  • Electrical connection can be made only by qualified electrician, according to international and national installation standards.
  • Power supply source must be conform with data on heater label.
  • Power supply cable must be selected corresponding to heater electrical data.
  • Automatic circuit breaker must be selected corresponding to technical data table.
  • Heater must be grounded.

SERVICE
No special service is required for electrical heaters, only to check electrical connection not less than 1 time per year

TROUBLESHOOTING

  • No heat from the heater
  • Eliminate overheating cause, press RESET” button on the heaters cover.
  • No power supply the heater  check all external electrical connection components.
Automatic circuit breaker switching off
  • Check circuit breakers data, it must correspond to heaters electrical data.
  • Check isolation of connection cables.
  • Check is heater grounded.
  • Check power supply source data, it must correspond to heaters electrical data.
Protection thermostat cut off
  • Low air flow speed through heater.
  • Check filters, fans and ducts

WIRING DIAGRAM

Electrical connection without built in regulator

HAVACO ERH Electric Duct Heaters 2

ELECTRICAL WIRING DIAGRAM MARKING

HAVACO ERH Electric Duct Heaters 3

  • IV: Heating steps
  • B : Automatic reset overheating thermostat
  • C:Manual reset overheating thermostat
  • J : Switch
  • K1…K5 :Relays
  • S…S5: Automatic circuit breakers
  • T: thermostat
  • V1, V2 ;Triacs
  • HR5K: External temperature setpoint
  • TJK10K ; Duct temperature sensor
Electrical connection  NI/NV/NIS

DIMENSIONS mm

Heater dimensions without built in regulator

HAVACO ERH Electric Duct Heaters 4

Heater dimensions NI/NV/NIS

HAVACO ERH Electric Duct Heaters 5

Producer reserves the right to change technical data.

References

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