CAUTION Consequently, the instructions in this manual, as well as national and local rules and safety regulations, must be At altitudes above 6,600 ft [2 km], contact Danfoss complied with. regarding PELV. Safety Regulations...
Machinery Directive. However, if an adjustable frequency drive is not powered. To avoid electrical frequency drive is supplied for use in a machine, Danfoss hazards, disconnect AC line power, any permanent provides information on safety aspects relating to the magnet type motors, and any remote DC link power adjustable frequency drive.
CE-labeled in accordance with the EMC directive. The manufacturer can ensure CE- rests with the installer. As an aid to the installer, Danfoss labeling under the EMC directive either by using has prepared EMC installation guidelines for the Power CE-labeled components or by testing the EMC of Drive system.
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Discharge dampers reduce power consumption somewhat. achieved in typical applications. Inlet guide vans offer a 40% reduction but are expensive to install. The Danfoss adjustable frequency drive solution reduces energy consumption with more than 50% and is easy to install.
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The next pages provide typical examples of applications within HVAC. For further information about a given application, ask the Danfoss supplier for an information sheet that gives a full description of the application. The following application notes can be downloaded from the Danfoss web page, www.danfoss.com/BusinessAreas/DrivesSolutions/Documentations/Technical+Documentation.htm.
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Several features of the Danfoss dedicated adjustable frequency drive can be utilized to improve the performance of the CAV system. One concern of controlling a ventilation system is poor air quality. The programmable minimum frequency can be set to maintain a minimum amount of supply air, regardless of the feedback or reference signal.
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The adjustable frequency drives can also be used to turn the fan on and off as needed. Several features of the Danfoss dedicated adjustable frequency drive, the HVAC adjustable frequency drive can be utilized to improve the performance of cooling tower fans applications. As the cooling tower fans drop below a certain speed, the effect the fan has on cooling the water becomes insignificant.
The output from the motor control is then limited by the maximum frequency limit. 2.7.3 PM/EC+ Motor Control The Danfoss EC+ concept provides the possibility for using high efficient PM motors (permanent magnet motors) in IEC standard frame size operated by Danfoss adjustable frequency drives.
(Alarm 16 Trip Lock). Installation at high altitude: To protect the adjustable frequency drive against a short At altitudes above 6,600 ft [2 km], contact Danfoss circuit at the load sharing and brake outputs see the regarding PELV.
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(ETR). coast. 2.11.1 Motor Thermal Protection This is the way Danfoss protects the motor from being overheated. It is an electronic feature that simulates a bimetal relay based on internal measurements. The charac- teristic is shown in Figure 2.27.
Once the set-up of an adjustable frequency drive is If the parameter's value is changed back to the factory complete, Danfoss recommends to store the data in the settings from another different value, the parameter will LCP or on a PC via MCT 10 Set-up Software tool.
RS-485 communication cable must be kept Stop of the adjustable frequency drive in various away from motor and brake resistor cables. Normally, a ways: distance of 8 inches [200 mm] is sufficient, but Danfoss • Coast stop recommends keeping the greatest possible distance •...
7.6 Modbus RTU Overview 7.6.1 Assumptions E19E 0000 H 0000 H 03E8 Danfoss assumes that the installed controller supports the high interfaces in this document, and strictly observes all Figure 7.9 Message requirements and limitations stipulated in the controller and adjustable frequency drive.
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Danfoss shall not be responsible for any errors in catalogs, brochures or other printed material. Danfoss reserves the right to alter its products at any time without notice, provided that alterations to products already on order shall not require material changes in specifications previously agreed upon by Danfoss and the Purchaser. All trademarks in this material are property of the respective companies.
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