Vacon 100 Applications Manual

Also see for 100 INDUSTRIAL: Installation instruction Installation manual Installation manual Installation manual User manual

Contents

Vacon 100 Applications Manual Manual pdf 85 page image

Vacon HVAC Application vacon • 8224-hour support +358 (0)201 212 575 • Email: vacon@vacon.com33.6.16 Group 3.14: Multi-pumpThe Multi-pump functionality allows you to control up to 4 motors (pumps, fans) with PIDcontroller 1. The AC drive is connected to one motor which is the "regulating" motorconnecting and disconnecting the other motors to/from the mains, by means of contactorscontrolled with relays when needed in order to maintain the right setpoint. The Autochangefunction controls the order/priority in which the motors are started in order to guarantee theirequal wear. The controlling motor can be included in the autochange and interlocks logic, or,it may be selected to always functions as Motor 1. Motors can be taken out of use momentarily,e.g. for service, using the motor Interlock function. See page 106.Table 68: Multi-pump parametersIndex Parameter Min Max Unit Default ID DescriptionP3.14.1 Number of motors 1 5 1 1001Total number of motors(pumps/fans) used inmultipump system.P3.14.2 Interlock function 0 1 1 1032Enable/Disable use ofinterlocks. Interlocks areused to tell the system if amotor is connected or not.0 = Disabled1 = EnabledP3.14.3 Include FC 0 1 1 1028Include the frequencyconverter in the autochangeand interlocking system.0 = Disabled1 = EnabledP3.14.4 Autochange 0 1 0 1027Disable/enable rotation ofstarting order and priority ofmotors.0 = Disabled1 = EnabledP3.14.5 Autochange interval 0.0 3000.0 h 48.0 1029After the expiry of the timedefined with this parameter,the autochange functiontakes place if the capacityused lies below the leveldefined with parametersP3.14.6 and P3.14.7.P3.14.6 Autochange:Frequency limit 0.00 50.00 Hz 25.00 1031 These parameters define thelevel below which thecapacity used must remainso that the autochange cantake place.P3.14.7 Autochange: Motorlimit 0 4 1 1030P3.14.8 Bandwidth 0 100 % 10 1097Percentage of the setpoint.E.g.: Setpoint = 5 bar,Bandwidth = 10%: As long asthe feedback value stayswithin 4.5...5.5 bar motordisconnection or removal willnot take place.P3.14.9 Bandwidth delay 0 3600 s 10 1098With feedback outside thebandwidth, this time mustpass before pumps are addedor removed.