HYDROMATIC SPD50H/100H PUMP
Pump Servicing
Read the following instructions carefully before replacing any parts. Reasonable care and safe methods should be
practiced.
Tools Required
General tools include socket wrenches and a bearing puller. An ohmmeter is required to thoroughly check motor
and wiring.
For proper automatic operation, make sure the pump power cord is plugged into the piggyback receptacle on the
float switch cord.
Before removing the pump from its installation for repairs, check first to see if the trouble is caused by:
1.
Miswiring of the pump into the terminal block.
2.
Miswiring of the bloat level controls into the panel.
3.
Miswiring inside the control panel.
4.
Trip circuit breaker. If the breaker is manually reset and then trips off again, the problem could be:
a. short circuit in motor of control panel
b. water in the motor housing
c. insufficient amp capacity of wiring or breakers
d. improper panel wiring
5.
Tripped overload. If the overload is manually reset and then trips off again, the problem could be:
a. pump or piping is clogged
b. pump motor or bearings may be defective
c. start capacitor in motor may have failed
d. pump may be misfired to terminal block
e. head is lower than rating, pumping too much liquid
6.
Air locked pump. Disconnect piping at union and run until all air bubbles are expelled.
7.
Wrong impeller rotation. Rotation should be counter-clockwise when looking at the impeller. Correct
improper rotation on three phase pumps by reversing any two line leads. No rotation check is necessary on
single phase pumps.
8.
Closed discharge gate valve.
9.
Plugged impeller or pipeline.
10.
Discharge head may be too high. Check elevation against design point of pump.
11.
Floats not hanging free in the sump.
12.
Malfunctioning floats.
Disconnect power supply.
Checking Power Chord
To be sure wires are not burned off or broken in cord, use ohmmeter for 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 wire, then place a screwdriver
blade across 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.
