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VFD68 Variable Frequency Drive (575 VAC) Installation Instructions

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VFD68 Variable Frequency Drives (575 VAC)

Introduction

The VFD68 Variable Frequency Drives are designed to provide three-phase motor speed control in a variety of 
HVACR applications. The VFD68 Drives are factory-configured for condenser fan speed control on HVACR 
condensing units. You can quickly and easily reconfigure the VFD68 Drives to control variable speed pumps in 
cooling and heating applications, or to drive variable speed supply fans in VAV applications. 

This document provides information for VFD68Dxx (575 VAC) Drive models only. For information pertaining to 
VFD68Bxx (230 VAC) and VFD68Cxx (460 VAC) Drive models, refer to the 

VFD68 Variable Frequency Drive (230 

or 460 VAC) Installation Instructions (Part No. 24-7664-3108

).

Note:

The VFD68 Drive cannot drive motors in conveyor systems or robotic applications.

Note:

Do not attempt to install, operate, maintain, or inspect the VFD68 Drive until you have read through this 
document carefully and can use the equipment correctly. Do not use this product until you fully understand 
the equipment, safety information, and instructions.

To view the 

VFD68 Variable Frequency Drive Technical Bulletin (Part No. 24-7664-3051)

, which covers 230 VAC, 

460 VAC, and 575 VAC models, visit the following web address: 
http://cgproducts.johnsoncontrols.com/MET_PDF/2476643051.pdf

North American Emissions Compliance

United States

Canada

IMPORTANT:

 Use this VFD68 Variable Frequency Drive only as an operating control. Where failure or 

malfunction of the

 

VFD68 Drive could lead to personal injury or property damage to the controlled equipment 

or other property, additional precautions must be designed into the control system. Incorporate and maintain 
other devices, such as supervisory or alarm systems or safety or limit controls, intended to warn of or protect 
against failure or malfunction of the VFD68 Drive.

IMPORTANT:

 Utiliser ce VFD68 Variable Frequency Drive uniquement en tant que dispositif de 

régulation. Lorsqu'une défaillance ou un dysfonctionnement du VFD68 Drive risque de provoquer des 
blessures ou d'endommager l'équipement contrôlé ou un autre équipement, la conception du système de 
contrôle doit intégrer des dispositifs de protection supplémentaires. Veiller dans ce cas à intégrer de façon 
permanente d'autres dispositifs, tels que des systèmes de supervision ou d'alarme, ou des dispositifs de 
sécurité ou de limitation, ayant une fonction d'avertissement ou de protection en cas de défaillance ou de 
dysfonctionnement du

 

VFD68 Drive.

This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to 
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful 
interference when this equipment is operated in a commercial environment. This equipment generates, uses, 
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, 
may cause harmful interference to radio communications. Operation of this equipment in a residential area may 
cause harmful interference, in which case users will be required to correct the interference at their own expense.

This Class (A) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment 
Regulations.

Cet appareil numérique de la Classe (A) respecte toutes les exigences du Règlement sur le matériel brouilleur 
du Canada.

Summary of Contents for VFD68D Series

Page 1: ...5 Dimensions 7 Mounting 8 Wiring 10 Precautions 11 Terminal Screw Torque Specifications 12 Branch Circuit Protection 12 Short Circuit Ratings 12 High Voltage Wire Size and Maximum Wire Length 12 Selec...

Page 2: ...Adjusting the Default Parameters 25 Enter the Parameter Adjustment Mode 25 Select and Change Most Parameters 25 Select and Change P 90x Parameters 25 Exit the Parameter Adjustment Mode 26 Manual Moto...

Page 3: ...controlled equipment or other property additional precautions must be designed into the control system Incorporate and maintain other devices such as supervisory or alarm systems or safety or limit c...

Page 4: ...Information Voltage kW Horsepower Dimensions H x W x D mm in D 575 VAC 50 60 Hz F 0 75 1 G 1 5 2 H 2 2 3 J 3 7 5 K 5 5 7 1 2 L 7 5 10 M 150 x 140 x 136 5 15 16 x 5 1 2 x 5 5 16 N 150 x 220 x 148 5 15...

Page 5: ...re radio frequency or electromagnetic emissions may cause interference IMPORTANT When selecting the motor do not exceed the maximum output current rating of the VFD68 Drive IMPORTANT Do not control bo...

Page 6: ...position in an enclosure Ambient air temperature is a temperature outside an enclosure The VFD68 is designed to operate above 50 C by following the maximum output current derating limits show in Table...

Page 7: ...for VFD68Dxx Drives mm in VFD Model H H1 W W1 D VFD68DFM 150 5 15 16 138 5 7 16 140 5 1 2 128 5 1 16 136 5 3 8 VFD68DGM VFD68DHM VFD68DJN 220 8 11 16 208 8 3 16 148 5 13 16 VFD68DKN VFD68DLN Figure 2...

Page 8: ...gure 4 2 Remove the high voltage wiring cover at the bottom of the VFD68 Drive by pulling in the direction of Arrow A Figure 5 Mount the VFD vertically in an acceptable NEMA rated enclosure on a non f...

Page 9: ...ension 3 7 kW 5 HP or Less 5 5 to 7 5 kW 7 1 2 to 10 HP A 100 mm 4 in or more 100 mm 4 in or more B 10 mm 7 16 in or more 50 mm 2 in or more C Figure 6 Required Clearance for Mounting Inside an Enclos...

Page 10: ...charge lectrique Afin d viter tout risque de d charge lectrique attendre au moins 10 minutes apr s la d connexion de l alimentation CA du VFD68 Drive pour intervenir sur l appareil Le VFD68 Drive rest...

Page 11: ...ion and phase to phase insulation of the VFD output side before applying power Carefully check the motor insulation resistance especially when the VFD is used with an old motor or a motor located in u...

Page 12: ...age drive output U V W to the motor Selecting the Correct VFD68 Drive for a Fan Motor 1 Determine the maximum current consumption from the motor ratings label 2 Use Table 9 to find the maximum output...

Page 13: ...recommended cable wire size is that of the cable PVC cable with a continuous maximum permissible temperature of 70 C Assumes that the surrounding air temperature is 40 C or less Selection example for...

Page 14: ...ate Figure 1 on page 4 for that model indicates that the VFD68DGM Drive has a voltage rating of 575 VAC and a maximum output rating of 7 amperes c Table 9 on page 13 gives the recommended wire size as...

Page 15: ...10 Note Use UL Listed copper stranded wire with insulation rated at 75 C 167 F for wiring the high voltage supply to the drive R L1 S L2 T L3 and wiring the high voltage drive output U V W to the moto...

Page 16: ...relay and regenerative brake circuits SD Common Common for contact inputs using Sink logic default setting and 24 VDC supply AM Analog Output 0 10 VDC analog output corresponding to output frequency P...

Page 17: ...g STF Contact Input Forward rotation Must connect STF to SD terminal common using the factory supplied jumper to allow the VFD to rotate in a forward direction STR Contact Input Reverse rotation not u...

Page 18: ...the P 90x parameters For medium and low pressure refrigerants you must determine the proper P499R Transducer and then calculate and change the P 90x parameters For more information see Setup and Adju...

Page 19: ...ot the drive and motor operation using controlled input signal values EXT Mode In the External EXT mode the drive and motor respond to a signal or signals from one or two external analog input signal...

Page 20: ...d to change the parameter setting consecutively when in the setting mode Press the key to change the parameter setting Used to give a forward rotation command Used to give a reverse rotation command U...

Page 21: ...9 Motor Rated Current Set parameter to the rated FLA on motor rating plate 0 500 A Rated VFD68 Output P 19 VFD Output Voltage Defines the maximum output voltage relative to the drive supply voltage 2...

Page 22: ...t 1 Minimum speed defined as frequency 0 60 Hz 12 5 Hz P 902b screen b Analog Input 1 of input voltage to start minimum speed ramp 0 100 38 1 90 V P 903 screen a Analog Input 1 Maximum speed defined a...

Page 23: ...quency and Motor Speed Frequency Hz is an expression of motor speed RPM on the VFD Figure 14 and Figure 15 show how the drive operating frequency is related to the speed RPM of the motor Figure 14 Fre...

Page 24: ...y Audible Motor Noise and EMI Using the default setting P 72 1 frequency 1 kHz electromagnetic interference EMI radiation and leakage current from the wiring between the VFD68 Drive and the motor is l...

Page 25: ...SET P 000 appears The underline indicates a blinking character 14 Press the down arrow once to show P 900 15 Press SET twice until P 900 appears 16 Press the up arrow twice to display P 902 17 Press...

Page 26: ...motor EXT Mode Using Analog Inputs After the motor FLA and speed have proven to be acceptable follow the procedure in Restarting the Motor After It Has Stopped on page 29 The VFD68 Drive is now commis...

Page 27: ...1 of 2 Operation Panel Indication Name Error message E Faults history HOLD Operation panel lock Er1 to 4 Parameter write error LOCD Password locked Err VFD reset Warning OL Stall protection over curre...

Page 28: ...BE Brake transistor alarm detection E GF Output side earth ground fault over current at start not used E LF Output phase loss E OHT External thermal relay operation not used E PTC PTC thermistor opera...

Page 29: ...ect the jumper between the SD and STF terminals on the low voltage terminal blocks 2 Verify that the SINK SOURCE jumper to the left of the low voltage terminal blocks Figure 11 is set to SINK 3 Press...

Page 30: ...phase NEMA Design B motors required Inverter rated motors recommended Overload Capacity 150 of ampere rating for 1 minute Start Stop Use STF input to start or stop the motor Ambient Conditions Storage...

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