Schwank infraSchwank D Series

Questions and Answers

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Robyn WagnerAug 3, 2025
What to do if my Schwank infraSchwank D Heater shows error code 1 (ionization error during start)?
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  Timothy JohnsonAug 4, 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).
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Carrie KirbyAug 9, 2025
What causes Schwank Heater error code 10 (MODBUS signal missing error) and how to fix it?
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  Kelsey KnightAug 9, 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.
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Molly WilliamsAug 16, 2025
Why does my Schwank infraSchwank D show error code 2 (ionization error during operation)?
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  Nicholas CastilloAug 16, 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.
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Michael ChavezAug 22, 2025
What to do if my Schwank infraSchwank D Heater displays error code 5 (encoder signal missing error)?
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  Lynn GarciaAug 22, 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.
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Lisa TuckerAug 27, 2025
How to fix Schwank infraSchwank D error code 9 (wrong setting fan speed parameters)?
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  Anthony KennedyAug 28, 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

Introduction

Notes for Your Safety

Important safety notes and general guidelines for operating the radiant tube heater.

Electrical Safety Precautions

Safety measures for electrical installation and maintenance of the radiant tube heater.

Your Safety

General Safety Notes

Guidelines for proper use, handling, and maintenance of the radiant tube heater.

After-Sales Service Information

Information on seeking professional assistance for installation, start-up, and service.

Scope of Delivery

Product Kit Components

Details of the main kits included in the radiant tube heater package.

Available Accessories

List of optional accessories available for the radiant tube heater system.

Planning

Suspension Height and Positioning

Guidelines for determining the correct suspension height and positioning of the heater.

Safety Distances to Flammable Materials

Specifies minimum distances to flammable materials to prevent fire hazards.

Heater Positioning and Mounting

Instructions for mounting the radiant tube using chains and steel wire suspension systems.

Legal Requirements

German Regulations and Standards

Overview of German regulations, standards, and directives applicable to the appliance.

Operation

Switching the Heater On

Step-by-step guide for starting the radiant tube heater operation.

Fault Handling and Lockout

Procedure for handling faults, error codes, and lockout states.

Regular Maintenance

Schedule and procedures for routine maintenance of the heater.

Technical Specification

Appliance Description

General description of the appliance and its heating method.

Minimum Gas Connection Pressure

Required minimum gas pressure at the valve for different gas types and models.

Electrical Power Supply

Electrical connection details including voltage, frequency, and cable requirements.

Operating Description

Heater Start-up Sequence

Detailed steps for starting the radiant tube heater, including fan and ignition sequence.

Normal Heater Operation

Explanation of how the heater functions during normal operation, including flame and heat emission.

Combustion Air Supply Monitoring

How the combustion air supply is monitored and its impact on operation.

Assembly Instructions

Radiant and Burner Kit Assembly

Step-by-step guide for assembling the radiant tube and burner kit components.

Required Tools

List of tools required for the assembly process.

Pre-Mounting Notes

Important considerations and checks before starting the mounting process.

Installation Instructions

Gas Installation Safety Warnings

Critical safety warnings regarding gas pipe handling and potential leaks.

Gas Pipe System and Heater Mounting

Guidelines for connecting gas pipes and mounting the heater unit.

Flexible Hose Connection

Requirement to connect the heater using an approved flexible gas hose.

Commissioning Instructions

Pre-Commissioning Checks

Prerequisites and checks before initiating the commissioning process.

Parameter Settings (IC 4000;1)

Configuration and adjustment of parameters for the IC 4000/1 burner control unit.

System Commissioning and Adjustment

Procedures for adjusting negative pressure and commissioning the system.

Service Guide and Troubleshooting

Maintenance and Annual Checks

Guidelines for regular maintenance and annual checks of the appliance.

Error Codes and Descriptions

List and explanation of error codes generated by the heater.

Troubleshooting Error Causes

Identification of common error causes and potential solutions.

Gas Family Change Procedure

Gas Family Change Steps

Step-by-step instructions for changing the gas family of the heater.

Accessories and Options

Ball Guards

Description and scope of delivery for ball protection grids.

Reflector Elongation

Instructions for mounting reflector elongations for thermal protection.

Gas Filter Groups

Description and part numbers for gas filter groups to prevent valve issues.

Water Protection Cover for Burner Kit

Details and assembly instructions for the water protection cover.

Spare Parts List

Spare Parts (Burner Kit)

List of spare parts for the burner kit, including article numbers.

EC Type Examination Certificate

EU Type Examination Certificate Details

Details of the EU type examination certificate, including applicable regulations and standards.

EC Declaration of Conformity

Product Description for Conformity

Declaration of conformity for the Gas-fired Radiant Tube Heater.

Applied EC Directives

List of European Community directives applied to the product.

Harmonized Standards Basis

List of harmonized standards used as the basis for conformity.

Ecodesign Regulation Information

Ecodesign Data (infraSchwank D)

Characteristic values for energy performance as per Ecodesign regulation for infraSchwank D.

Ecodesign Data (calorSchwank D)

Characteristic values for energy performance as per Ecodesign regulation for calorSchwank D.

Schwank infraSchwank D Series Specifications

General

Model	infraSchwank D Series
Category	Heater
Fuel Type	Natural Gas or Propane
Ignition	Direct spark ignition
Reflector Material	Aluminum
Mounting	Ceiling or Wall
Coverage Area	Varies with model
Warranty	1 year limited warranty
Heat Output	Variable depending on model