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Schwank calorSchwank D 40 U - User Manual

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infraSchwank D / calorSchwank D
Radiant Tube Heater
15 U / 20 U / 30 U / 40 U / 50 U / 60 U
1-stage / modulating lambdaPlus
single heater and flue gas collection system [herringbone] type F
Technical Manual
Technical Instructions
Operating Instructions
Legal Requirements
Assembly Instructions
Installation Instructions
Commissioning
Service Guide
0085BO0037
Version 021 infra D U-Form 16/19
Technische Änderungen vorbehalten

Table of Contents

Questions and Answers

  • E
    escottAug 9, 2025
    What to do if my Schwank Heater shows error code 1 (ionization error during start)?
    • J
      Jesse WoodsAug 9, 2025
      If your Schwank Heater displays error code 1, indicating an ionization error during start, it could be due to several reasons. First, check the gas line to ensure it is properly vented and that the gas cock is open. Other potential causes include a faulty gas valve (which would need replacement), damaged or dirty ignition and ionization electrodes (inspect, clean, or replace them), an incorrect gas throttling screw setting (adjust it accordingly), or poor grounding (ensure proper grounding of the system).
  • C
    Cynthia SullivanAug 15, 2025
    What causes Schwank calorSchwank D 40 U Heater error code 10 (MODBUS signal missing error) and how to fix it?
    • D
      Donna CannonAug 15, 2025
      Error code 10 on your Schwank Heater indicates a missing MODBUS signal. This can occur due to an interruption in the MODBUS connection lasting longer than 3 minutes, in which case you should restore the MODBUS connection. Alternatively, it may be caused by incorrect wiring between the IC4000/1 and the SchwankControl Touch; ensure that the wiring is correctly configured.
  • L
    leeamyAug 21, 2025
    Why does my Schwank calorSchwank D 40 U Heater show error code 2 (ionization error during operation)?
    • V
      Vicki CarterAug 21, 2025
      Schwank Heater error code 2, which indicates an ionization error during operation, can be attributed to a poor low ionization current (less than 0.7?A DC). In this case, increase the ionization current. Another possible cause is too low connection pressure, so check and adjust the connection pressure accordingly.
  • B
    Brittany VargasAug 27, 2025
    What to do if my Schwank calorSchwank D 40 U Heater displays error code 5 (encoder signal missing error)?
    • R
      rodriguezmalloryAug 27, 2025
      If your Schwank Heater is showing error code 5, which means the encoder signal is missing, it could be because the PWM fan isn’t running due to issues like a broken impeller or motor. Try to repair or replace the PWM fan. Another possible reason is a broken PWM cable, which would need to be replaced.
  • M
    Mark TateSep 2, 2025
    How to fix Schwank calorSchwank D 40 U Heater error code 9 (wrong setting fan speed parameters)?
    • C
      Christopher LewisSep 2, 2025
      Schwank Heater error code 9 signals that the fan speed parameters are set incorrectly. This could be due to wrong settings for the fan speed parameters [PP04, PP05, PP06], so adjust the fan speed parameters accordingly. It may also indicate a damaged fan, such as bearing failure, in which case you should replace the damaged fan.

Summary

2 Your Safety

Safety for the electrical equipment

Guidelines and warnings related to electrical safety during installation and maintenance.

4 Planning

Suspension and Positioning

Guidelines for proper suspension, height, and positioning of the heater.

Safe Distances and Radiation Direction

Specifies safe distances and optimal direction for heat radiation.

Air supply; Exhaust Requirements

Air supply; exhaust systems

Exhaust flue with flue collecting system and central flue fan

5 Legal Requirements

German Regulations for Heating Installations

6 Operation

Heater Operation and Maintenance

Procedures for switching on/off, fault handling, and regular maintenance.

7 Technical specification

Electrical and Control Systems

8 Operating description

Heater Start-up and Operation

Step-by-step start-up, operational principles, and fault monitoring.

Combustion Air Monitoring

9 Assembly instructions

Radiant and Burner Kit Assembly

Instructions for assembling the radiant tube and burner kit components.

Model-Specific Assembly

Assembly burner kit exhaust gas collection system

Conversion kit burner kit single heater to exhaust gas collection system

10 Installation instructions

Gas Pipe System and Heater Mounting

Guidance on connecting gas pipes and mounting the heater unit.

Electrical Installation and Wiring

Electrical installation [wiring diagram]

General instructions and warnings for electrical installation and wiring.

Modulating operation lambda Plus

Electrical connection Operation with MODBUS control

SchwankControl Touch Anschluss-Schema Dunkelstrahler; max. 4 Zonen über Modbus

Wiring diagram for connecting multiple heaters via MODBUS to SchwankControl Touch.

Wiring scheme burner kit infraSchwank D; calorSchwank D 1-stage via relay control SchwankControl Touch - without MODBUS control

Wiring scheme burner kit infraSchwank D; calorSchwank D modulating via relay control SchwankControl Touch - without MODBUS control

Wiring scheme burner kit infraSchwank D; calorSchwank D exhaust gas collecting system with SchwankControl Touch; extension kit Fan Control SAV1

11 Commissioning instructions

Before commissioning

Prerequisites and checks before performing the commissioning of the heater.

Assignment MODBUS address

Operational Adjustments

Single-Stage Nozzle Pressure Adjustment

Procedure for setting and checking nozzle pressure for single-stage operation.

Modulating Operation Thermal Load Settings

Adjusting thermal loads, regulator output, and fan voltage for modulating operation.

Commissioning Exhaust Gas Systems

System Start-up and Negative Pressure Checks

Procedures for system start-up and required negative pressure levels.

Determination of Nozzle Pressure

Nozzle Pressure Determination Example

Guidance on determining correct nozzle pressure using Wobbe-Index.

12 Service guide; Trouble shooting

Maintenance and Annual Check

Routine maintenance procedures and annual checks for the heater.

Error Codes and Troubleshooting

List of error codes and their causes/solutions.

13 Change of Gas Family

Gas Family Change Instructions

EC Certificates and Product Information

EC Type Examination Certificate

EC Declaration of Conformity

Declaration stating the heater's compliance with EC directives.

Ecodesign Product Information

Schwank calorSchwank D 40 U Specifications

General IconGeneral
ModelcalorSchwank D 40 U
CategoryHeater
TypeInfrared Tube Heater
FuelNatural Gas or Propane
BTU Input40, 000 BTU/h
Heating Length20 ft
ControlThermostat or Manual

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