Washtech XP Service Manual download pdf (Page 22)

Detergent Pump

Part Number

600 30094

Function

When fitted the pump automatically injects detergent into wash tank during filling

of the machine and at the start of each wash cycle.

Description

Fixed Flow Peristaltic Pump PG1.5

Voltage: 230 V 50Hz

Pressure: 0.1 Bar

Flow rate: 1.5 L/h (0.42 ml/sec)

Max suction height: 1.5 M

Diagram

Replacement

Peristaltic pumps provide reliable and accurate detergent dosing. However over

time the squeeze tube in the pump will flatten and become ineffective, and/or split

and leak. We therefore recommend quarterly inspection of the squeeze tube and

replacement every six months in high use situations, particularly when chlorinated

detergents are used.

Adjustment

Standard machine controls operate the detergent pump continuously during filling

of the wash tank. At specified water supply pressures the fill flow is about 12l/min.

The detergent pump dispenses at a rate of 25 ml/min, i.e. the pump is dispensing

2 ml. of detergent per litre of wash water during filling.

The detergent pump is also set to operate during the wash cycle. Factory timer

settings in seconds of pump operation per wash are: XG – 10 sec,

GLV/UD/XP/XU – 15 sec, AL/AL8/PW1/TW – 20 sec, PW2/PW3 – 30 sec.

These settings will deliver about 2 ml of detergent per litre of rinse water

consumed. If the recommended concentration of your detergent is different from

2 ml/litre then the dosing time should be adjusted – refer Timer page in the

Service Manual for instructions. The dosing time T = 2.4 V x C, where V is the

volume of water consumed by the machine per cycle – refer Installation

instructions, and C is the required concentration of your detergent. For example, if

water consumption per cycle is 3 litres and recommended concentration is

3 ml/litre then the dosing time should be adjusted to 22 seconds.

On glasswashers where cold final rinse is used longer injection times are required

to compensate for the dilution of wash water by the cold rinse.

Service Manual XP-2

Revision 1C

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Washtech XP Service Manual Page 22