Pump Motor; Cleaning; Maintaining Clear Bath Water; Condenser, Air Vents, And Reusable Filter (Refrigerating/Heating Circulators Only) - PolyScience 300-048 Manual De Operación

6.3

Pump Motor

The pump bearings are permanently lubricated with high-temperature silicone grease and do not
require additional lubrication. Should the bearings become noisy, replacement of the entire pump
motor is recommended. This will reduce repair labor costs and retain fluid pumping reliability.
A replacement pump and motor mounting kit is available (see Section 10 - Replacement Parts).
6.4

Cleaning

Only mild detergents and water or an approved cleaner should be used on the painted and stainless
steel surfaces of the Circulator. Do not allow cleaning liquids or sprays to enter the Controller vents.
A concentrated bath cleaner is available that can be used to remove mineral deposits from the
reservoir. See Section 10 - Replacement Parts.
6.5

Maintaining Clear Bath Water

When water is used as the bath fluid, optimal conditions are present for algae growth. To prevent
algae contamination and minimize the need for draining the reservoir, an algicide should be used.
See Section 10 - Replacement Parts.
Do NOT use chlorine bleach in the reservoir or on any pump parts.
6.6 Condenser, Air Vents, and Reusable Filter
(Refrigerating/Heating Circulators Only)
To keep the refrigeration system operating at optimum cooling capacity, the
condenser, the front and back air vents, and reusable filter should be kept free of
dust and dirt. They should be checked on a scheduled basis and cleaned as
required.
The reusable filter is easily accessed from the bottom/front of the unit. Turn the
filter-retaining clip away from the filter cutout and remove the filter as shown by
photo 6.6. Use a mild detergent and water solution to wash off any accumulated
dust and dirt and then rinse thoroughly and dry before reinstalling.

Section 7 - Troubleshooting

7.1

Unit Will Not Operate (no heat, cooling, or pumping)

• Check that the power cord is plugged in to an operating electrical outlet.
• Check that the Circuit Breaker/Power Switch is ON.
• Check that the Controller Power Switch is ON.
• Check that the Safety Set temperature is higher than the control temperature set point.
• Turn power off, press the Safety Set Reset button, and restore power.
7.2

No Pumping

• Check the fluid level of the bath to be sure the pump head is covered with fluid.
• If the pump motor does not spin, verify that the Pump Speed Switch is either in the HIGH or LOW
position. If it is in the middle, the pump will not receive power.
• Check the pump impeller for obstructions (it should turn freely).
7.3

Slow or Insufficient Pumping

• Check for low line voltage, particularly when the heater is on.
• Check for too small of a hose diameter (closed loop applications).
• Check for too high of a fluid viscosity.
Photo 6.6