Pentair MYERS WHR-DS Owner's Manual page 12

POINTS TO CHECK IF PUMP DOES NOT
RUN OR DOES NOT RUN PROPERLY
1. Pump does not run or start when water is up in sump.
a. Check for blown fuse or tripped circuit breaker.
b. Check for defective level switch.
c. Where control panel is used be sure H-O-A switch is
in the Auto position. Turn switch to the HAND position
and if pump runs then trouble is in the automatic
electrical system. Have an ELECTRICIAN make
electrical checks.
d. Check for burned out motor. Occasionally lightning
can damage a motor even with lightning protection.
e. Where plug-in cords are used be sure contract blades
are clean. DO NOT USE PLUG-IN CORDS INSIDE A
SUMP OR WET WELL.
2. Pump runs but does not deliver flow.
a. Check for air lock. Start and stop pump several times
if this does not help it may be necessary to loosen a
union in the discharge line to relieve air lock.
b. Check valve may be installed backward. Check flow
arrow on valve body. Check shut-off valve it may be
closed.
c. Check vertical elevation, it may be higher than pump
can develop. (See pump curve.)
d. Pump inlet may be plugged with a rag or trash.
Remove pump to check.
e. If pump is three phase be sure pump rotation is
correct. (See instructions for checking rotation.)
f. Level control ball or weight may be stuck on side of
basin. Trash may be stuck on ball preventing it from
floating up.
ALWAYS UN-PLUG CORD OR TURN OFF
CIRCUIT BREAKER BEFORE DOING ANY WORK ON
THE PUMP. If control panel is remote from pump, disconnect
lead wires to motor so that someone cannot turn the circuit
breaker back on. If motor is three phase mark the leads so
they can be replaced in same order.
DISMANTLING PUMP FOR
REPLACEMENT OF PARTS
Clean pump thoroughly. Knock off all scale and deposits.
Use sandblast if possible. Submerge complete unit in bleach
solution for one hour before taking apart.
TO REPLACE CAPACITORS ONLY
The motors on all WHR, WHRH and WHRE series single
phase pumps are of the permanent split capacitor type, so
have no relays or starting switch, and have only a starting
capacitor that is in the circuit for both starting and running
conditions.
1. Remove oil fill plug in top of motor and pour out oil. Fig. 8
2. Remove bolts from capacitor housing and bump housing
with plastic hammer to loosen. Fig. 9
3. Lift housing and disconnect motor leads and capacitor
wires. Fig. 10
4. Remove capacitor clamp and slide out capacitor.
Replace with new capacitor and re-connect. Fig. 11
Wiring connections are given in these instructions.
5. Replace capacitor housing, be sure rubber seal ring is in
place. Fig. 12
6. Refill motor with Myers submersible motor oil, DON'T
OVER FILL WITH OIL. OIL LEVEL SHOULD BE ONE
INCH FROM TOP OF CASTING. Fig. 13
7. Be sure pump turns free before plugging into power.
Turn pump on side and turn impeller, using screwdriver
in slotted shaft.
Plug pump into receptacle to test operation. Pump must
run quiet and free of vibration.
12
FIG. 8
FIG. 9