Pentair Hydromatic SP50, Owner'S Manual

Page: 4 / 12

Pump
Servicing
read the following instructions
carefully before replacing
any parts. reasonable care
and safe methods should be
practiced. check local codes and
requirements before installation.
only com pe tent electrician
should make the installations.
Servicing should be performed
only by knowledgeable pump
service contractor or authorized
service station.
Remove from power source.
WArning: Shock hazard.
1. Checking power cord. To be
sure wires are not burned off or
broken in cord, use ohmmeter
to check. Set ohmmeter scale
pointer to r X 1 scale and
attach one meter lead to white
cord wire and one meter lead
to black cord lead, then place
screwdriver blade across blade
terminals of plug. if cord is
oK, meter needle will go to
zero and stay there. if meter
needle does not move, this will
indicate an open wire and cord
must be replaced.
2. Checking motor operation.
When switch cap is off and
switch is removed, connect
two terminals that were
connected to switch together
and tape. Plug power cord
in power receptacle to check
motor operation. motor should
start and run smoothly. if
motor does not start, pump
must be dismantled and
motor checked.
CAuTiOn: Be sure to
unplug cord before continuing
or reassembly if pump
is functional.
3. Checking motor stator.
if motor does not run when
tested as described above, the
stator must be removed from
the housing and checked.
remove plug (12) from top
of housing, and pour oil in
container, preferably glass,
so that oil can be observed.
if oil is clear it will indicate
motor is not burned and there
has been no water leaking into
the motor. if oil is cloudy or
black, it will indicate water in
the motor or a burned stator.
after draining oil, remove
bolts (10) and remove cord
nut (25) from motor cord (21).
remove rubber seal ring from
around cord. Turn cord and
lift up until seal ring (26) is
removed. Pry between ears of
housing (24) to remove from
base. disconnect motor cord
from stator and remove bolts
(2) and plate. Lift stator from
base. if stator is visibly burned,
it must be replaced. if stator is
not burned but the oil shows
signs of water, stator can
be checked with the ohmmeter
to see if it can be reused.
4. ground che ck. Set ohmmeter
scale pointer to r X 100K
scale and check meter by
putting both meter leads
together and adjusting the
needle knob until meter reads
zero. if meter cannot be
adjusted to zero it will indicate
that batteries in meter must be
replaced.
check meter to zero and adjust
if necessary before making
any checks on motor.
Now connect one meter lead
to one blade terminal of stator
and touch other meter lead to
motor stator shell. if needle
reads below 5 (500,000 ohms)
stator must be dried out before
rechecking. To dry out, place
motor in 220 degree oven
for four hours. recheck after
motor cools. if motor is new
or thoroughly dry, needle
of ohmmeter will not move
on the ground check: This
indicates a reading of 50
megohms or higher. one
megohm is one million ohms.
When making the ground
check, if the needle goes
to zero the motor in all
4
Performance Curve