Homa AM***-C, Instruction Manual

Page: 62 / 72

62 | EngliSH
External Seal Probe Connections
Single wire Option
Two wire Option
Seal Probe Cable
Seal Probe Cable
Supply
Supply
Circuit is completed though pump housing.
Use ground lead as return for 1 wire seal probe.
Return
Single wire Option
Two wire Option
Seal Probe Cable
Seal Probe Cable
Supply
Supply
Circuit is completed though pump housing.
Use ground lead as return for 1 wire seal probe.
Return
10.14. SINGLE PHASE PUMP START-UP PROCEDURE
Run Capacitor sizing can vary depending on the incoming
supply voltage provided. HOMA Single Phase pumps are
provided with Start and Run Capacitor(s) sized for 220-
230V under load. Frequently, the available line voltage is
considerable different than indicated, and the Run capac-
itor(s) may need to be resized to match the available field
voltage. The following procedure will allow you to verify
proper operation of your single phase pump, and/or make
necessary changes to you capacitors to correct for your
power supply.
After verifying wiring is in accordance with your pump re-
quirements, start pump and record the following readings
from each of the (3) pump cable leads.
Current under load:
U1________ Amp .,>U2________ Amp .,>Z2________ Amp .
U1: highest reading (Should be)
U2: middle reading
Z2: lowest reading
Lead U1 (common) should have the highest current read-
ing. Lead Z2 (start) should have the lowest reading.
If Z2 current draw is greater than the current draw of ei-
ther U1 or U2, a smaller size Run capacitor (lower micro-
farad rating) is required to correct the condition. Example:
If a 60 µf Run capacitor was supplied, change to a 50 µf
Run capacitor and check current readings. Typically, only
one step down in capacitor size is required, but in certain
instances 2 steps may be required.
( ) The standard capacitor kit provided includes:
____________ µf start capacitor
____________ µf run capacitor.
( ) Additional run capacitors have been included for use
in tuning the pump to match available line voltages for
optimum performance.
____________ µf run capacitor
____________ µf run capacitor
____________ µf run capacitor
This form is provided for your use in optimizing the perfor-
mance and service life of your single phase pumps, and is
applicable to most Capacitor Start/Capacitor Run motors.
Please contact our customer service with any questions
or if you require any additional information or assistance.