Operation – Using the Pump (continued)
17
4. Pressure
Switch
Operation
The pressure switch reacts to outlet pressure, and interrupts power at the
preset shut-off pressure indicated on the pump label. When outlet pressure
drops below a predetermined limit the switch will close and the pump
operates until the shut-off pressure is achieved. The shut-off pressure is set to
factory calibrated standards.
Note: If the plumbing is restrictive or the flow rate is very low, the
pump may re-pressurize the outlet faster than the fluid is being
released, causing rapid cycling (*ON/OFF within 2 seconds). If the
pump is subjected to rapid cycling during normal operation, or for
infrequent periods, damage may occur. Applications which exhibit
rapid cycling should have restrictions in the outlet minimized.
5. Leaving
unattended
If the pump must be left unattended at any time
:
a)
Disconnect power to the pump.
b)
Relieve system pressure.
6. Discontinue
use if
clogged or
inoperative
If the pump becomes clogged or inoperative during use, discontinue use
immediately.
- DO NOT attempt to service while chemicals are in the pump and power is
connected.
- Return to service area to review instructions for troubleshooting before
attempting to service.
CAUTION
DO NOT
operate the pump at pressures which cause the motor to exceed the amperes rating
indicated on the name plate.
Improper adjustment of the pressure switch setting may cause severe overload or premature
failure. Failures due to improper adjustment for the pressure switch setting will not be
covered under the warranty.
“Intermittent Duty” is defined as: operated and/or frequently started within a period of time
that would cause the motor to reach its maximum thermal limits. Once the maximum
thermal limit is obtained, the motor must be allowed to return to ambient temperature before
resuming operation.
Note: A reserve, clean container capable of holding at least the volume of the entire pump system
should be kept for use when the pump system needs to be emptied temporarily for repairs. The
container should be properly labeled as to its contents if it is used.
