Labconco SteamScrubbe & FlaskScrubbe Glassware Washers 44204 Series User Manual
Page 51
Labconco Glassware Washer Service/Technical Manual
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7. Use diagnostics to check fill times and function of the new valve.
8. Re-install the panels.
DI/Pure Water Pump Replacement
Use the following procedures to replace/install the DI/Pure Water
Pump. This pump allows the user to supply the washer with non-
pressurized, gravity-fed purified water. The pump works in
conjunction with the DI/Pure Water solenoid valve to fill the washer
when set to use Purified water (during rinses). If the pump fails,
the washer will experience a Low Water Alarm during DI Rinse cycles.
**Completely drain and disconnect electrical power to the unit before
proceeding with any of these instructions.
1. Remove the Left Panel or Left Service Access Panel.
2. Locate the DI/Pure Water Pump.
3. Remove the four nuts holding the pump to the Base Weldment.
4. Loosen the clamps on the pump inlet and outlet hoses.
5. Remove the hoses and place them in their appropriate fittings onto the
new pump.
6. Tighten the clamps on the pump inlet and outlet.
7. When the Hoses are secured to the pump, place it over the four mounting
screws.
8. Tighten down the four lock-nuts.
9. Test the pump in diagnostics.
Water Level Pressure Switch/Hose Replacement
Use the following procedures to replace/install the DI/Pure Water
Pump. This pressure switch has replaced the domed float switch in
older units. As the water fills the sump/tank the pressure in the
tube rises actuating the first contact (initial fill). If the second
Figure 18
Left: DI/Pure Water Pump. The
Pure water pump is located in the
Front Left of the machines base.
The Yellow Circles indicate the four
nuts that mount the DI Pump to the
base of the unit.
The Blue and the Green Circles
highlight the DI Pump’s inlet and
outlet hose fittings and clamps,
respectively. The pump’s inlet hose
leaves the inlet solenoid and loops
over the pump. The pump’s outlet
hose leaves the pump and goes to the
tank’s Water Inlet Port. The location
of this port depends on the age of the
unit; it is either on the back or the
right side of the unit.
The Magenta Circle points out the
electrical connections where the DI
Water Pump’s wiring hooks into the
units Base Wiring Harness.