HOMA A Series - Manual (Page 8)

A Series
Installation, Operation & Maintenance Manual
MAINTENANCE
Regular maintenance will help ensure longer
pump life and more reliable operation. It is
recommended that pumps in intermittent
operation be inspected twice a year and pumps
in continuous operation be inspected every 1,000
hours. The following is a listing of required
inspection and maintenance items.
If any of the problems described in the
following list exists stop operating the pump
to avoid damage or personal injury.
1. CABLE ENTRY
Make sure that the cable entry flange and strain
relief clamp are tight. If the cable entry is
showing signs of leakage remove cable from
entry, remove grommet, cut a piece of cable off
so that the grommet seats on a new portion of
the cable, replace grommet, and reinstall cable
assembly, into the top of the motor.
Note: Explosion Proof cables are sealed with a
Factory Mutual Approved potting compound.
Please consult factory for instruction.
2. CABLES
Inspect the cable for cuts, scrapes or sharp
bends. If the outer jacket is damaged, replace
the cable. Splices of the power or control cable
within the wet well area are not acceptable.
3. MOTOR INSULATION RESISTANCE
Megger the insulation between the phases; and
between any phase and ground. Resistance
values should be greater than 1 M ohm. If
abnormal readings are obtained, contact
authorized service center immediately.
4. EXTERNAL PARTS ON PUMP
Make sure that all screws, bolts and nuts are
tight. Check the condition of pump lifting eyes
and replace if damaged or worn, Replace any
external part that appears worn or damaged.
5. SEAL CHAMBER OIL
Note: Use extreme care when removing the seal
chamber plug, as the chamber may become
pressurized if seal failure has occurred. Seal
chamber oil should be checked for signs of water
intrusion, or other impurities any time the pump is
removed from wet well. To check the condition
of the oil, remove the oil fill plug. Drain the
chamber volume into a transparent container.
Visually check sample for impurities or
emulsification (oil may appear cream-like if a
small amount of water is present). If significant
water intrusion has occurred, remove and
replace lower mechanical seal. Unless obvious
mechanical damage has occurred to the lower
seal, it is good practice to replace the upper and
lower mechanical seals as a set. Refill seal
chamber with fresh oil to the bottom of fill plug
port (when pump is in vertical position) and
replace oil fill plug.
6. IMPELLER
Periodically inspect impeller by turning pump on
its side, remove suction strainer nuts and strainer
to expose impeller and relocate position of
adjusting plate (suction cover) as needed.
Replace the impeller if it is damaged or worn.
SPARE PARTS
In order to obtain spare parts identify the
required parts by looking at the enclosed cross
sectional drawing and listing, and contact
authorized HOMA PUMP TECHNOLOGY
representative with your order. Authentic Homa
Pump Technology parts shall be used to
maintain warranty.
Note: Explosion Proof pumps must be identified
as such, and the pump serial number must be
referenced for proper parts identification.
RECOMMENDED TOOLS AND
SUPPLIES
In addition to ordinary maintenance and lifting
devices, ensure that complete set of metric Allen
wrenches, impeller puller, Loctite 242 (Blue), and
Anti-seize compound are on hand.
Pg. 8