GE PDE9900 manual Positive Displacement Pump, Approximate Detergent Use, To remove the pump

Positive Displacement Pump

The SmartDispenseTM positive displacement pump consists of a continuous flexible tube running from the detergent reservoir to the inner door detergent outlet. The tube runs around the inside edge of the pump housing. A 3-roller impeller fits tightly into the center of the pump housing with each of the

3 rollers squeezing the sidewall of the tube. As the impeller is driven counterclockwise by the motor, it squeezes out a predetermined amount of detergent for each 1/3 revolution of the impeller.

Approximate Detergent Use

Smart Dispense Dosage Amount

Dosage (ml)			Soil Level
		1	2	3	4
Hardness	1	33	41	49	57
	2	35.4	43.4	51.4	59.4
	3	37.8	45.8	53.8	61.8
	4	40.2	48.2	56.2	64.2
	5	42.6	50.6	58.6	66.6

Smart Dispense Bottle Duration

Bottle Duration (wks)			Soil Level
	1	2	3	4
1	10.3	8.3	6.9	5.9

From

Detergent

Reservoir

Pump

Housing

Impeller

To Detergent Outlet

Hardness	2	9.6	7.8	6.6	5.7
	3	9.0	7.4	6.3	5.5
	4	8.4	7.0	6.0	5.3
	5	8.0	6.7	5.8	5.1

To remove the pump

1.Remove the door panel. (See Door Panel.)

2.Remove 2 Phillips head screws from the lower right side of the door edge to release the pump bracket.

3.Remove the grommet from the inner door panel and unplug the tube from the reservoir outlet.

4.Disconnect the wires and remove the pump.

The dispenser pump operates on 120 VDC. During each pre-wash cycle, the pump is energized for 5 seconds, dispensing 4ml of detergent.

The electronic control uses two inputs to determine the total amount of detergent dispensed during the main wash cycle:

•Soil Level determined by the turbidity sensor

•Water Hardness as calibrated for the location

A water hardness selection mode permits the calibration of the water hardness for the location at installation. (See Water Hardness Test and Calibration.)

To determine the amount of detergent to dispense during the main wash, the control uses the following formula:

4ml x Number of Pre-washes

+ 25ml + Additional Quantity for Hardness

The additional quantity is a predefined quantity of detergent based on the water hardness level programmed into the control.

Positive Displacement Pump Strip Circuit

BULK DETERGENT

PUMP

ORANGE	WHITE
J2-1	M

875 Ω

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