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Fig. 1
Valve
(min. 3/4")
MAINTENANCE
a)
LUBRICATION:
- The pump requires no lubrication.
- For electric motor, refer to instructions provided by the motor
manufacturer.
b)
REPLACING MECHANICAL SEAL (Figure 2):
Disassembly:
- Disconnect electric power.
- Drain pump.
- Disconnect piping.
- Remove the 4 bolts (1) and take off the casing (2).
- Remove motor cap (8) and insert a screwdriver. Unscrew the
impeller (4) in a counter-clockwise direction.
- Slip the rotating seal (5) from shaft (7) of seal plate/motor
assembly.
- Remove seal plate (9) from the motor, being careful not to
damage the ceramic seat (6).
- Inspect the ceramic seat (6). If it needs replacing, press it out
of the adapter from the motor end.
Reassembly:
- Clean all parts thoroughly before reassembly. Use liquid soap
on the rubber cup on the ceramic seat (6) and push it into the
seal plate (9). Make sure that the smooth surface of the ceramic
seat faces outward.
- Assemble the seal plate (9) to the electric motor, being careful
not to damage the ceramic seat (6).
- Use liquid soap on the rotating seal (5) and slip it on to the
shaft (7) with the seal ring towards the ceramic seat (6). Make
sure that the seal ring face on the rotating seal contacts the
ceramic seat.
- Screw on the impeller (4). Assemble the casing (2) and use a
new gasket (3). Check to ensure that the impeller can rotate
freely in the casing.
- Reconnect pump to suction and discharge hoses.
- Do not remove the fl inger (12) from the shaft.
PRECAUTIONS
a)
Whenever the pump is dismantled and then reassembled, always
check to see that the impeller rotates freely within the casing.
b)
Do not remove the fl inger (12) from the shaft.
Discharge
Valve
Check
Valve
Pump
Air Bleed Line
Suction Line
Strainer
Fig. 2
TYPICAL INSTALLATION
1)
EFFLUENT PUMP APPLICATION
-
1 only wall mounted electrode type liquid level control #LH890-
895.
-
3 only 155-3W electrodes, each with 50 ft. (15.2m) #16 fl exible
wire attached, for 115 volts.
NOTE: For 230 volts, use a fl oatless liquid level control
#2LH-892-895.
IMPORTANT
a)
We recommend, as required by CSA, a three electrode or a
three brass rod system, comprising of a high level start, a low
level stop and a ground (actuator).
b)
As alternates, pressure diaphragm switches or a mercury
fl oat switch may be used. Ensure that the current and voltage
specifi cations match those of the pump.
c)
Many plumbers prefer not to use a strainer at the suction inlet as
the strainer could clog. The pump is designed to handle the effl uent
and though it is advisable to use a strainer, it is not absolutely
necessary.
2)
SUMP PUMP APPLICATION
Clamp the switch to the suction pipe as shown in Fig. 4. Attach the
fl oat and wire assembly and adjust the position of the fl oats. As the
water reaches the top fl oat, the pump will turn on; when it drops to
the bottom fl oat, the pump will turn off. Wire the pump and switch as
shown in Fig. 5. Employ a licensed electrician to do the wiring.
TROUBLESHOOTING
a)
Pump fails to prime or primes slowly:
•
Leaks in the suction line.
•
Loose gasket connection due to shrinkage of the gasket.
•
Collapsed or clogged suction line.
•
Not enough water in the casing for priming.
•
Suction lift is too great.
b)
Reduced pressure or capacity:
•
Partially collapsed or clogged suction hose.
•
Clogged impeller.
•
Leaks in the suction line.
•
Strainer or end suction hose is not properly submerged.
•
Suction line is improperly installed, resulting in air pockets
in the suction line.
•
Suction lift is too great. (The greater the suction lift, the lower
the capacity and pressure.)
•
Worn parts, such as the impeller or the pump casing.
c)
Poor or little capacity:
•
Improper impeller rotation. Impeller must rotate in a counter-
clockwise direction as seen facing the pump from the front
of the casing.
2
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