KNF N035 AN.18 - User Manual

Questions and Answers

M
Monica WilliamsAug 2, 2025
What to do if KNF Water Pump does not transfer?
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  Timothy BallardAug 2, 2025
  If your KNF Water Pump isn't transferring, there are several potential causes: * **No voltage:** Check the room fuse and switch it on if necessary. * **Overheating:** Disconnect the pump and allow it to cool down. Identify and resolve the cause of overheating. * **Blockages:** Inspect connections and lines for any blockages and remove them. * **External valve/filter issues:** Check external valves and filters. * **Condensate in pump head:** Detach the condensate source and flush the pump. * **Worn valves:** Replace the diaphragm and reed valves (valve plate).
M
Matthew SpenceAug 17, 2025
What to do if KNF N035 AN.18 is on but not running and the switch is not lit?
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  Jeffrey PriceAug 17, 2025
  If your KNF Water Pump is switched on but not running, and the on/off switch isn't lit, it could be due to these reasons: * **Not connected to power:** Connect the pump to the mains power. * **No voltage:** Check the room fuse and switch it on if necessary.
T
Terry RamirezAug 25, 2025
What to do if KNF Water Pump is on but not running and the switch is lit?
- K
  Kyle NguyenAug 25, 2025
  If your KNF Water Pump is switched on but not running, and the on/off switch is lit, it's likely due to the thermal switch opening because of overheating. To resolve this, remove the pump’s mains plug from the socket, allow the pump to cool down, and then identify and eliminate the cause of the overheating.
J
Janice DanielNov 8, 2025
Why is the flow rate, pressure, or vacuum too low on my KNF Water Pump?
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  Tracey CunninghamNov 9, 2025
  If the flow rate, pressure, or vacuum is too low on your KNF Water Pump, consider these possible causes: * **Condensate in pump head:** Detach the condensate source from the pump and flush the pump. * **Pressure Imbalance:** Change the pressure conditions if there's gauge pressure on the pressure side along with vacuum or excessive pressure on the suction side. * **Insufficient cross-section:** Disconnect the pump to check output values. If needed, eliminate throttling and use larger lines or connection parts. * **Leaks:** Ensure tubes are correctly placed on hose nozzles, replace leaky tubes, and eliminate any leaks. * **Jammed connections:** Inspect connections and lines, removing any obstructions. * **Soiled Head:** Clean the head components. * **Worn valves:** Replace th...

Summary

Safety

Personnel and Safe Operation

Emphasizes qualified personnel and safety-conscious operation, including warnings about body exposure to vacuum.

Handling Dangerous and Flammable Media

Guidelines for handling dangerous and flammable media, and awareness of ignition temperatures.

Environmental Protection and Disposal

Instructions for proper disposal of replacement parts and contaminated materials.

Technical Data

Pump Materials Specifications

Details the materials used for pump heads, diaphragms, valves, and gaskets for different pump models.

Pneumatic Performance Data

Lists delivery rate, maximal operating pressure, and ultimate vacuum for various pump types.

Electrical Data 100 V Versions

Electrical Data 115 V Versions

Electrical Data 230 V Versions

Other Operational Parameters

Pump Dimensions and Weight

Installation and connection

Installation Procedure

Connecting Components

Operation

Preparing for Start-up

Starting the Pump

Guidance on starting the pump, including operating parameters and crucial warnings about overpressure.

Switching Pump On and Off

Procedures for safely switching the pump on and off, including considerations for thermal switches and aggressive media.

Servicing

Servicing Schedule

Cleaning Procedures

Changing Diaphragm and Valves

Detailed steps, required spare parts, and tools for replacing diaphragms and reed valves.

Pump Parts Identification and Diaphragm Replacement

Reed Valve Replacement and Final Assembly

Troubleshooting

Pump Not Transferring Issues

Identifies common causes and remedies for the pump failing to transfer media, including electrical and blockage issues.

Low Flow Rate or Pressure Issues

Addresses causes and solutions for insufficient flow rate, pressure, or vacuum, including leaks and worn parts.

Pump Not Running or Thermal Switch Issues

Troubleshoots problems where the pump does not run, or the thermal switch trips, covering power and overheating causes.

Fault Rectification and Service

KNF N035 AN.18 Specifications

General

Type	Diaphragm Pump
Series	N035
Max Pressure	6 bar
Weight	0.27 kg
Liquid temperature range	5 to 40 °C
Voltage	230 V
Materials in contact with the fluid	PTFE, EPDM
Power Supply	230V, 50/60Hz
Operating Temperature	5 to 40 °C
Material	PP