Operating Instructions

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Start-up Procedures

Start

up Procedure, Conventional Bypass (C

Bypass)

Siemens Industry, Inc. BT300 Bypass Operator's Manual DPD01391

Building Technologies 2017-09-28

Start-up Procedure, Conventional Bypass (C-Bypass)

NOTE:

Insert an X in the Check column when completed; enter N/A if not used.

Step Check Description

1 Verify that all three input phases are connected to the input fuse block (or circuit breaker depending upon model) and that

the motor leads are connected to the output terminals of the overload relay only.

NOTE: The M1 (Bypass) contactor and the M2 (Output) contactor outputs are connected together at the factory.

2 Verify that all factory connections within the bypass are tight, as factory connections can loosen during shipment.

3 Before applying power, verify the following:

- The DRIVE/OFF/BYPASS switch is in the OFF position.

- The DRIVE TEST switch (if installed) is in the OFF position.

4 Dial in the current limit on the overload, in accordance with the connected motor.

5 Apply power to the drive with C-Bypass option using the main disconnect. Verify that all three phases are present, and that

the input voltage is correct for the system.

6 Place the DRIVE TEST switch (if installed) in the ON position.

7 The keypad illuminates and the Startup Wizard of the drive is active. Complete the Startup Wizard. When prompted for

Bypass Wizard, answer YES.

NOTE: This should be activated when the unit is first powered up. If not, reset the drive to factory-default to return to a

good, known starting configuration. This can be completed by selecting the following:

User Settings (6)/Parameter Backup (6.6)/Restore Factory Defaults (6.5.1)/Activate.

See

Startup Wizard

for detailed information.

8 When executing the Bypass Wizard, select Conventional. See

Bypass Wizard

for detailed information.

9 Place the DRIVE/OFF/BYPASS switch in the DRIVE position.

10 Place the DRIVE TEST switch (if installed) in the OFF position.

11 “Bump” the unit into Drive mode by completing the following:

Press the HAND/AUTO button on the drive. Select Drive, and press OK. Select Hand, and press OK. When Activate

displays, press OK. Enter a setpoint of at least 5 hertz. Press the green I button to start the motor. Verify that the motor

rotation is correct for the application. Press the red O button to stop the motor.

NOTE: If the motor rotation is incorrect, do not correct now. Complete Steps 14 and 15 first, and then see Step 16 for

corrective actions.

12 Place the DRIVE/OFF/BYPASS switch in the OFF position. The drive’s keypad should turn off if a Drive Test switch is

installed (3-contactor versions).

13 Bump” the unit into Bypass mode by completing the following:

Place the DRIVE/OFF/BYPASS switch into the BYPASS position, and quickly back to the OFF position. Verify that the

motor rotation is correct for the application.

NOTE: If the motor rotation is incorrect, do not correct now. See Step 16 for corrective actions.

14 If the motor rotation was incorrect in either Step 13 or 15, remove power to the bypass assembly using the disconnect

switch. Wait 5 minutes to allow for the drive's DC Bus to discharge. See

Motor Rotation Correction Wiring

for required

changes. Apply power, and repeat Steps 13 through 15 to verify proper rotation again

15 Place the DRIVE/OFF/BYPASS switch in the DRIVE position.

16 Complete any other required wizards found in the Quick Setup (1) menu.