Teikoku USA | Chempump
Instruction Manual HE-12270 (1219)
13
3.2.4 Rotation Check (Teikoku Rotary Indicator TRC-1)
Centrifugal pump impellers must rotate in the proper direction to
deliver rated head and capacity. The impeller must rotate in the
same direction as the arrow cast on the pump casing.
Caution!
Pump and motor must be fully primed, vented, and liquid
full prior to checking direction of rotation.
The Type-L TRG Meter A45 C does not provide direction of rota-
tion. The Teikoku TRC-1 hand-held direction of rotation indicator
is available from Teikoku USA. This portable device can be used to
confirm the rotation of any motor. See
Figure 3-1.
1. Set VFD speed to 60 Hz.
2. Verify suction valve is 100% open.
3. Set discharge valve 10% to 20% open.
4. Set start valve at 100% closed.
5. Switch on the pump for 3 to 5 seconds.
6. Check indication of TRC-1 hand-held rotation indicator. See
Figure 3-1
.
7. If direction of rotation is not correct, swap any two of the
electrical supply leads and repeat rotation check.
8. Once direction of rotation has been verified, stop the pump
and leave it for several minutes.
9. Once you have determined correct rotation, tag correctly
connected main power leads, in accordance with motor lead
markings.
Attention!
It is recommended that the unit be run as little as possible
with a closed discharge valve in order to prevent excessive
overheating of the liquid circulating within the unit.
3.3 Starting Procedure
Caution!
Do not start or operate pump unless fully primed and
liquid full.
Caution!
Do not continuously cavitate the pump.
Attention!
The pump should not be allowed to run for more than one
minute with the discharge valve fully closed.
Attention!
Wait a minimum of 10 minutes between starts.
After priming, venting, and checking the direction of rotation, put
the pump in operation as follows:
1. Set VFD speed to required Hz for desired differential pressure.
For differential pressure vs speed see
Appx. G
and
Appx. H.
2. Set the valve in the suction line to 100% open.
3. Set the valve in the discharge line to 100% open.
4. Set the start vent valve to 100% closed. When a solenoid
valve is used for the start vent verify that the solenoid valve
is open when the pump is off line and closed when pump is
in operation.
5. Start the pump. Pump should operate with very low noise and
vibrations. Excessive or abnormal noise or vibrations should
be corrected immediately.
6. Adjust VFD speed as required to achieve specified flow rate.
7. Once pump is operational, check the reading of the TRG me-
ter. Record initial reading for comparison to future readings.
Check indication of TRG meter. See
Table 2-1
8. During any start up sequence, caution must be exercised not
to exceed full load ampere rating indicated on the nameplate.
9. If the unit has not been run for a period of two weeks or
more, the following inspections should precede its operation:
A. Check terminal box for moisture.
B. Upon starting, check for excessive noise, vibration, erratic
speeds or excessive amp draw.
Caution!
If the pump appears to be air bound as a result of the unit
not being properly primed, do not continue operation. Lo-
cate and correct the conditions that prevent proper prim-
ing before attempting to start the unit.
Figure 3-1. Teikoku Rotary Indicator TRC-1
