Washtech XP Series, Service Manual

Page: 19 / 44

Detergent Pump
Part Number
600 30526
Function
The pump automatically injects detergent into wash tank during filling of the
machine and at the start of each wash cycle.
Description
Peristaltic Dosing Pump with Timer
Power: 8 W
Voltage: 230 V
Frequency: 50 Hz Pressure: 3 Bar
Flow rate: 1.5 L/h
Dosing time:
0-30 sec
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.
To replace squeeze tube – wear safety glasses and gloves, switch machine off, remove the
transparent lid, ease the squeeze tube off rollers and replace the new one.
CAUTION – caustic based detergents are hazardous.
To replace complete pump – disassemble the pump after unscrewing two screws from the
support bracket; assemble the new pump in reverse order. To prime pump drain and refill the
machine - detergent will come up to full strength after several cycles.
Adjustment
The detergent pump operates continuously during filling of the wash tank. The concentration
during fill is equal to the detergent dosed (ml/min) / the water filling rate (L/min).
The detergent pump is also set to operate during the wash cycle. The factory setting is 15 seconds.
If the recommended concentration of your detergent differs from 2ml/L then the dosing time
should be adjusted by turning the adjusting screw of the pump. Turning the adjusting screw clockwise
increases the dosing time.
Dosing Time Equation:
T = 2.4V x C
, where
T
= Dosing time (sec),
V
= Water used per cycle (L),
C
= Detergent concentration (ml/L).
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 XP3 19 Revision 1F