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9. Check for moisture inside control panel
enclosure. Moisture can cause damage to
electrical com ponents. Check door gasket
for prop er seal.
10. Check labels to verify they have not
been damaged.
11. Lubricate enclosure hinges.
12. Pull floats and check for proper operation and
ensure there is no foreign buildup on them.
Spare Parts List: The following is a list of
recommended spare parts. However, conditions of
ser vice vary significantly and a general list may not in
its entirety be applicable to a given installation. The
user should ex er cise judgment in defining specific
require ments based on this guide.
1. Fuses for control transformer primary and
secondary. (If required)
2. Contactor.
3. Bulbs for any light requiring a bulb.
4. Control transformer. (If required)
5. Alternator relay. (If required)
FLOAT CONTROLS:
Optional: The LOW WATER / REDUNDANT OFF
float should be installed just above where the pump
begins to ingest air normally; this is about the top of
the volute.
The OFF float should be installed about halfway down
the pump. If a LOW WATER / REDUNDANT OFF
float is used, then the off float should be installed
a minimum of 4 inches above the LOW WATER /
REDUNDANT OFF float.
Install the ON / LEAD floats a minimum of 4 inches
above the OFF float. If additional volume is to be
pumped on each cycle or if the pump running time for
each cycle needs to be increased, then increase the
K4563 11/08/12
distance from the ON / LEAD float to the OFF float
as needed.
Install the HIGH WATER float 4 inches above the
ON / LEAD float.
For duplex systems install the LAG / OVERRIDE float
4 inches above the HIGH WATER float.
On duplex systems where both pumps have to run
on a daily basis to keep up with the incoming flow,
then the HIGH WATER and the LAG / OVERRIDE float
position should be reversed.
SEAL FAILURE INPUTS:
Your pump may be equipped with a seal fail (moisture)
sensor. Refer to your pump owner's manual to
determine if your pump is so equipped.
The presence of water energizes the seal leak warning
output. This activates a warning light or alarm only,
and does not stop the motor. It indicates a leak
has occurred and the pump must be repaired. The
resistance across the moisture seal (seal failure)
probes should be checked after a seal leak warning
light has lit. This can be done by disconnecting the
control wires from the control panel and measuring
the resistance with an ohmmeter between the
wires. Refer to the control panel schematic for wire
identification. For a standard, non-hazardous location
pump the reading should be 100,000 ohms or greater,
and for a hazardous location pump the reading should
be above 30,000 ohms. If the measured values are
below those indicated above, then the pump may
have a lower seal failure and require service.
On control panels for hazardous location applications
the seal leak test switch tests the seal leak circuitry
continuity. When pushed the seal leak test bulb
should light. If the test bulb does not light, it means
either the wiring circuitry to the seal leak probes has
been broken or the bulb has burned out.
Note: Myers control panels supply the correct
circuitry for moisture and heat sensor connections.
Failure to install the correct circuitry with proper
connection would negate warranty and Factory
Mutual Approval.
TEMPERATURE FAILURE INPUTS:
Your pump may be equipped with a temperature
fail sensor. Refer to your pump owner's manual to
determine if your pump is so equipped.
If so equipped, your pump is provided with heat
sensor thermostats attached directly to the motor
windings. The thermostats open if the motor windings
see excessive heat and, in turn, open the motor
4
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