Pulsafeeder Pulsar DLC XP RC User Manual download pdf (Page 63)

13. System Repairs

13.1 Emergency Manual Pulsar Operation.

If your DLC-XP/RC is not functioning, you can operate your PULSAR manually without removing the

DLC-XP. Follow this procedure:

THE ATMOSPHERE MUST BE MADE SAFE (I.E., NON-HAZARDOUS) PRIOR TO ATTEMPTING THIS

PROCEDURE

1. Disconnect the power to the DLC-XP and DLC-RC at the main.

2. Remove wires to J1 LINE POWER and J3 PUMP MOTOR. Use wire nuts or other code approved

connectors to attach the LINE HOT to the MOTOR HOT, the LINE EARTH to the MOTOR

EARTH, and the LINE NEUTRAL to the MOTOR NEUTRAL.

3. Re-connect the PULSAR power at the main. Note! The PULSAR motor will start immediately!

Take all necessary precautions.

4. Identify the stroke adjustment shaft as a vertical rod with hex end that protrudes above the lower half

of the DLC-XP when the top half is removed. Rotate the stroke adjustment shaft manually clockwise

to zero the pump. It will be difficult to rotate as you are back-driving the DLC-XP motor. Be

careful! Do not force the knob. Try turning it in both directions to get a feel for the back-drive

torque. As you approach zero the knocking will diminish.

5. Once you have found zero, mark the knob and cover with a piece of tape to use as a reference.

6. You can set the stroke adjustment to a specific value by calculating the number of knob turns. To do

this, divide the desired setting (%) by a factor of 4 (%/rotation). For example, say your desired

setting was 67%. You would divide 67 by 4, which equals 16.75. So you would turn the knob 16 and

3/4 revolutions from the zero position.

13.2 DLC-XP Replacement

The following procedure assumes that you have received your replacement DLC-XP and are ready to

perform the replacement.

1. If possible, activate the PULSAR motor and adjust the stroke setting in the range of 10 to 90%.

Avoid 0 and 100% stroke settings on the PULSAR when replacing a DLC-XP. Do not adjust the

stroke setting beyond the 100% (25 turns from 0%) setting.

2. Disconnect the power to the DLC-XP and DLC-RC at the main. Power down all attached equipment

(e.g., PLC's).

3. Remove the four bolts that hold the DLC-XP to the PULSAR eccentric box (see Figure 22).

4. Remove the DLC-XP from the Eccentric Box by lifting vertically. Store it in the returnable

packaging.

5. Bring the replacement DLC-XP to the installation site.

6. Note the position of the PULSAR adjustment shaft 'flats.' They mate with a slot in the DLC-XP

output shaft -- the only external moving part on the DLC-XP. Familiarize yourself with these mating

components prior to installation (see Figure 21).

7. Locate the face on the bottom of the DLC-XP that mates with the face of the lip of the eccentric box.

The DLC-XP is oriented such that the conduit connections and access panel (with Serial Tag) reside

at the rear of the pump (as viewed standing in front of the reagent head looking at the motor) near the

gear box.

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Pulsafeeder Pulsar DLC XP RC User Manual Page 63