VENCO VHR 51 EC User Manual

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INSTALLATION – OPERATION &

MAINTENANCE INSTRUCTION

HEAT RECOVERY UNITS VHR AND VHR EC MODELS

VENCO Havalandırma ve Makina San.ve Tic. A.Ş.

2004. Cad. No:5 45400 OSB Turgutlu – MANISA / TURKİYE

Tel: +90 (236) 332 5070 Fax: +90 (236) 332 5030

www.venco.com.tr venco@venco.com.tr

2019.10

Table of Contents

Questions and Answers:

K
Kelly JonesJul 25, 2025
What to do if my VENCO VHR 51 EC Heating System has low airflow?
- D
  daniellemeadowsJul 25, 2025
  If the VENCO Heating System experiences low airflow, several factors could be at play. First, pressure loss in the ducts might be higher than initially calculated, suggesting a need to review the duct design. Second, clogged or dirty filters can significantly impede airflow; cleaning or replacing the filter is advised. Lastly, excessive leakage on the pressure side of the system can diminish airflow, so inspect doors and duct connections for leaks.
H
hgeorgeAug 4, 2025
Why is there high airflow in my VENCO VHR 51 EC Heating System?
- G
  Gina HendersonAug 4, 2025
  If your VENCO Heating System exhibits high airflow, it could be due to a few reasons. Check the duct connections for excessive leakage on the suction side of the system. Also, the fan motors might be experiencing overcurrent, indicating the engine is overloaded, so measure the current drawn by the engine. Another potential cause is a low supply voltage; in this case, consider installing grills.
C
Cheryl MooreAug 14, 2025
How to troubleshoot no air flow in VENCO VHR 51 EC when the motor isn't working?
- O
  ochoabradleyAug 14, 2025
  If there is no air flow and the motor isn't working in your VENCO Heating System, start by checking the power supply to ensure it's functioning correctly. If the power supply is okay, inspect the fan motor cables at the main controller board to ensure they are tightly connected, as thermal protection might be open. Also, verify the connection of the control panel by checking the socket behind the controller.

VENCO VHR 51 EC Specifications

General

Brand	VENCO
Model	VHR 51 EC
Category	Heating System
Language	English

Summary

INTRODUCTION

HEAT RECOVERY UNITS and VHR MODELS

TECHNICAL SPECIFICATION for HEAT RECOVERY UNITS

WORKING CONDITIONS

TRANSPORTATION – STORAGE – INSTALLATION

CONNECTIONS

DUCT CONNECTIONS

Connects air ducts to the unit ensuring proper airflow and leak-proofing.

DRAIN CONNECTIONS

Connects the drain pipe to the drain pan, preventing air suction.

ELECTRICAL CONNECTIONS

Details electrical connection procedures according to EN 60204-1 for safety.

SAFETY REQUIREMENTS

SAFETY LABELS

CONTROLS BEFORE START-UP

TRAINING OF TECHNICIANS

RECOMMENDATIONS FOR SAFETY

START-UP

MAINTENANCE

CONTROL FUNCTIONS

Standard Electronic Controller (SEC)

Details functions and operation of the standard electronic controller for unit management.

Functional Electronic Controller (FEC)

Outlines the functions and operation of the optional functional electronic controller.

TROUBLESHOOTING

SPARE PART LIST

APPENDIX

APPENDIX-1 Standard Controller (SEC) Electrical Wiring Diagram

Provides the electrical wiring diagram for the Standard Electronic Controller (SEC).

APPENDIX-2 Functional Controller (FEC) AC FAN Electrical Wiring Diagram

Shows the electrical wiring diagram for the FEC with AC fans.

APPENDIX-3 Functional Controller (FEC) EC FAN Electrical Wiring Diagram

Details the electrical wiring diagram for the FEC with EC fans.

APPENDIX-4 Functional Controller (FX 3.1 PRO) AC FAN Electrical Wiring Diagram

Presents the electrical wiring diagram for the FX 3.1 PRO controller with AC fans.

APPENDIX-3 Functional Controller (FX 3.1 PRO) EC FAN Electrical Wiring Diagram

Illustrates the electrical wiring for the FX 3.1 PRO controller with EC fans.

APPENDIX-3 230V / 50Hz / 1 Phase Electrical Heater Wiring Diagram

Wiring diagram for the 230V/50Hz/1-Phase electrical heater.

APPENDIX-4 400V / 50Hz / 3 Phase Electrical Heater Wiring Diagram

Wiring diagram for the 400V/50Hz/3-Phase electrical heater.

APPENDIX-5 Electrical Cable And Fuse Selection Tables

Tables for selecting appropriate electrical cables and fuses based on unit specifications.

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