HOMA CH_H Series - Manual (Page 5)

CH Series
INSTALLATION OF PUMPS WITH
RING STANDS:
The ring stand design allows for simple
economical installation or to be transportable
from one installation to another. It is intended to
operate completely or partially submerged in the
pumping liquid. Pump is designed to be installed
as a free standing unit.
Install the ring stand to the underside of the
volute with the supplied fasteners identified in
the accessory fastener selection table. Use
tightening torque’s indicated in the table.
Install suitable lifting chain of an adequate length
to ensure proper lowering and raising
capabilities. Lower the pump into the area where
it is required. Properly position power cable and
chain so they stay above pump and cannot enter
the pump suction.
START-UP
Prior To Applying Power
Prior to applying power to the pump; double
check all wiring and verify that the power
(Voltage, Phase) that will be supplied to the unit
matches the nameplate specified values.
Measure resistance of cable and pump motor
resistance of ground circuit between control
panel and outside of pump. Perform MEG ohm
check of motor insulation. Record all data on
start-up checklist which is included with this
manual.
Prior To Installation:
Before lowering the pump into position check the
direction of rotation. The impeller will rotate
clockwise as viewed from above, therefore the
pump will try to move in the counter clockwise
direction as the impeller rotates. "Bump the
Motor" by closing the pump circuit breaker and
push the pump start button and look for the
direction of movement specified above.
For three phase motors, if the starting jerk is in
the clockwise direction, open the circuit breaker
to isolate power and interchange two of the three
phase leads inside the control panel.
Wet Well Applications
If the above checks prove satisfactory the pump
is ready for operation. Lower the pump into
position . (Refer to Mechanical installation
section of this manual.)
Open discharge valve, and verify that all check
valves operate freely. It is very common for
discharge check valves to be jammed shut (or
open) after sitting for a period of time. Once all
valves are open and free, start the pump and
allow it to stabilize for several minutes prior to
recording any test data.
Listen for any unusual noise and be on the
lookout for unusual vibration This is generally
detectable on guide rails for AutoCoupling
installations and on discharge piping for ring
stand installations. Also for AutoCoupling
installations, look for any blow by from the
discharge connection.
Perform all remaining electrical , operational,
and performance tests specified on start-up
checklist. Record and provide details on the
checklist to validate warranty.
Pg. 5
Installation, Operation & Maintenance Manual