Laienke LKB direct-drive double-inlet fans

Reading one row of the curve sheet

In the 0.18 kW four-pole 200I schedule, the 1,088 m³/h row gives 255 Pa total pressure, 232 Pa static pressure, 0.48 A and 61.2 dB(A). These five values describe one operating point of one configuration. Read the row as a set; the sheet's highest pressure, lowest current and lowest noise sit on other rows. The sheet prints current, so electrical input power needs a separate figure.

Total and static pressure are separate columns, so state the basis your project uses before Laienke marks a point. Voltage, air density, acoustic distance and the full test set-up are not fully stated on the sheet; ask for them with a current controlled sheet when this point is near your duty.

Duplicate labels and motor current

The first sheet labels a 0.18 kW schedule 200I and prints 200I again above a 0.25 kW schedule. The 200II schedule lists a 0.32 kW four-pole motor with 1.05 A nominal current, while its 1,958 and 2,032 m³/h rows show 1.06 and 1.10 A.

Ask Laienke for the motor, ordering code, voltage and frequency, rated current and continuous operating limit, and which part of the curve the motor supports. Give your variable-airflow range if you have one. A motor change needs a revised curve, and a nominal diameter alone settles none of these points.

Both inlets inside the air-handling unit

LKB is a component, and the coils, filters and cabinet resistance come from the air-handling unit it goes into. Send the chamber size, inlet clearances, outlet connection and nearby coil and filter arrangement, and ask for the outline and mounting points of the exact motor and fan version. Both inlets need free air once panels, motor and filters are in place. For a fan already housed in its own cabinet, Laienke offers the BKB/BKBS cabinet fans.

Plan access for removal and wiring before signing off the unit. Decide whether isolation, flexible connections, inlet guards, controller and wiring come from Laienke or from the unit builder. Weather protection, washdown and special atmospheres need separate confirmation.

Motor control for VAV duty

VAV equipment is a listed application, and the page names no control protocol or approved speed controller for the external-rotor motors. Ask for the control method, usable speed range, motor cooling at low speed, protection and wiring, and match them to the unit controls and any filter or damper interlocks.

Compare offers at the same installed flow, pressure, density and control cases. Where electrical input matters, ask for measured input power with its supply conditions, since a current reading alone gives no power figure.

Test report and laboratory procedure

Laienke says LKB was tested by a mechanical-industry general-machinery testing institute; the report, date and model coverage are not on the page. Ask for the original report and check that it covers the size and motor you are buying.

Laienke's laboratory procedure covers measured speed, stable points, instrument calibration and acoustic conditions, which you can cite when agreeing tests for your order. A complete order file holds the corrected ordering code, selected curve, motor and control data, dimensional drawing, agreed inspections and the report where required, along with price and lead time.

Confirm in writing before ordering LKB fans

Ask Laienke to confirm in writing: the exact ordering code and sheet revision, settling which 200I schedule applies; motor power, voltage, rated current and the curve section it may run on; flow at your static or total pressure; sound level with its measuring distance; the speed controller approved for the motor; the outline with inlet clearances; and whether the testing-institute report covers your size.