Sterlco 140 to 6,285 Gallon Pump Tanks - Manual (Page 18)

Pump Tanks Chapter 5: Maintenance 18 of 36
Chapter 5: Maintenance
5-1 Preventative Maintenance
Water Treatment
Control of slime, algae, and bacteria growth is extremely important. Cooling towers and
reservoir pump tanks are superb environments for microorganism growth. Warm water,
organic debris, and air encourage bacterial growth. Treat your system with chemicals
(microbiocides) to control microorganism growth.
Caution! Uncontrolled microorganism growth causes system problems such as fouling
and corrosion, and can spread bacterially-transmitted diseases.
You must reduce slime growth and bacterial contamination to eliminate disease-causing
bacteria.
Properly used, environmentally approved microbiocide controls system bacteria. Chemical
treatments must be regularly monitored by qualified personnel.
The manufacturer strongly recommends use of EPA-registered microbiocides on a regular
basis. We do NOT recommend use of chlorine or backyard swimming pool chemicals.
Permitting the discharge of such chemicals into a city sewer may violate local, state, and/or
federal laws.
We offer a full-service water treatment program including chemicals, dispensing equipment,
automatic bleed-off, and monthly water analysis. Contact the Parts and Service department
for more information.
Lubricating Pump Motors and Seals
Some pump motors require greasing; use a high grade ball and roller bearing grease such as
Shell Dolium R or Chevron SR1. Motors with regreasable bearings are shipped with a high
quality, wide temperature range grease.
Caution! Pump seals require water for lubrication, so the pumps must never be run dry
or be dead headed.
Always fill the tank before attempting to operate the pumps. Seal failures usually result from
running the pump dry.
Maintaining Makeup Valve Assemblies
Periodically inspect the water makeup valve assembly for proper operation. If the valve no
longer shuts off completely or reliably, replace it. Make sure that the plastic ball float is
buoyant for proper operation.