China Suppliers: FM Series & RFM Hot Air Curtain Machines from a Leading Factory for Energy-Efficient Solutions
Install
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1
The installation of the FM series and the RFM series is the same. Just loosen the positioning screws at the bottom of the front of the machine body, separate the machine body from the base plate, and then firmly fix the base plate on the door frame or the wall (if not fixed tightly, it will cause vibration and noise). Hang the machine directly on the base plate, and reinstall the loosened positioning screws on the base plate in the original position to fix the machine body.
NoteWhen hanging the machine, do not forget to install the rubber shock absorbers. For the RFMS type installation, in addition to being the same as the above models, two hanging and fixing devices should be used to level the machine, and it is strictly prohibited to not fix it with the base plate and only rely on hanging. Otherwise, it will cause mechanical vibration and noise, and also affect the service life of the machine. Check the power supply voltage and the cross-sectional area of the selected switch wires to see if they are compatible with the installed air curtain machine.
- 2 The RFMS series water and heating air curtain machine is installed on the indoor side of the door or window to prevent water from accumulating in the coil of the heat exchanger and freezing and cracking.
- 3 According to the different heat media selected, corresponding water supply and drainage pipelines should be equipped, and the pipelines should be insulated. If using hot water as the heat medium, the lower part should receive water and the upper part should return water. An automatic vent valve should be installed at the outlet of the return water or at the highest point of the main pipe.
- 4 Use softened water when using hot water as the medium.
- 5 Before each operation of the water and heating air curtain machine, the condensate water in the heat exchanger or the mixed gas should be discharged. Preheat for 10 minutes, then turn on the air curtain. When stopping the use of the air curtain, the water in the coil should be drained completely. When the ambient temperature is lower than 0℃, the water system should not stop heating.
- 6 When the water and heating air curtain machine works in winter, the heat source should be able to continuously supply heat to ensure the working state of the air curtain.
Operation and Maintenance
- 1 If any abnormal phenomena or noises occur during the operation of any type of air curtain machine, stop the machine immediately for inspection.
- 2 Keep the interior of the hot air curtain clean, especially for the RFM-II PTC type and RFMS water-heated air curtain machines, they should be cleaned regularly of dust on the heaters, heat exchangers and other components.
- 3 Generally, after 1500 hours of cumulative use of the air curtain machine, it should be inspected. At the same time, remove the dust on the body, oil stains, and use neutral detergent for cleaning. When cleaning the fan wheel, be careful to prevent the blades from deforming or being damaged. Before inspecting or cleaning this machine, the power supply must be cut off to ensure safety.
- 4 When the water-heated air curtain is not in use in winter or during installation and debugging, the water inside the heater should be drained or other anti-freezing measures should be taken to prevent the heater from cracking due to freezing.
Frequently Asked Questions
What is the correct way to mount the base plate for FM and RFM series air curtains?
Loosen the positioning screws at the bottom front of the machine body, separate the body from the base plate, and fix the base plate firmly to the door frame or wall. Hanging must be secure to prevent vibration and noise. Remember to install the rubber shock absorbers during installation.
How should the RFMS water and heating air curtain be positioned and secured?
It must be installed on the indoor side of the door or window to prevent freezing. Additionally, two hanging and fixing devices must be used to level the machine. Relying solely on hanging without fixing it to the base plate is strictly prohibited as it causes mechanical vibration, noise, and shortens the machine's life.
What are the piping and water requirements for hot water heating air curtains?
Pipelines must be insulated. For hot water, the lower inlet receives water and the upper outlet returns water. An automatic vent valve should be installed at the return water outlet or the highest point of the main pipe. Always use softened water when hot water is the heating medium.
What steps should be taken before and after operating water-heated air curtains?
Before starting, discharge any condensate water or mixed gas in the heat exchanger, and preheat the unit for 10 minutes. When stopping use, completely drain the water from the coil. If the ambient temperature drops below 0℃, the water system must not stop heating.
What is the recommended maintenance schedule and cleaning procedure?
Inspect the machine after every 1500 hours of cumulative use. Always cut off the power supply before cleaning. Clean dust and oil from the body using a neutral detergent. Clean the fan wheel carefully to prevent the blades from deforming. Regularly clean dust from heaters and heat exchangers, especially on RFM-II PTC and RFMS models.