Teikoku USA | Chempump
Instruction Manual HE-10677-P (1018)
9
3.2.3 Rotation Check
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.
3.2.3.a Rotation Check using Type-M TRG Meter AM-45
The Type-M TRG Meter AM-45 is designed to provide a verifica-
tion of direction of rotation. If the TRG Meter immediately pegs
full scale the direction of rotation is not correct.
1. Verify suction valve is 100% open.
2. Set discharge valve 10% to 20% open.
3. Check that valves in reverse circulation piping are open. Verify
that the correct restriction orifice is installed in the reverse
circulation line.
4. Switch on the pump for 3 to 5 seconds.
5. Check indication of TRG meter. If TRG meter is pegged full
scale red, the pump is rotating in the reverse direction. See
and
.
6. If direction of rotation is not correct, swap any two of the
electrical supply leads and repeat rotation check.
7. Once direction of rotation has been verified, stop the pump
and leave it for several minutes.
8. Once you have determined correct rotation, tag correctly
connected main power leads, in accordance with motor
lead markings.
3.2.3.b Rotation Check using Hand-held TRC-1 Indicator
The Type-L TRG Meter A45 C does not provide direction of
rotation. The Teikoku TRC-1 hand-held direction of rotation in-
dicator is available from Teikoku USA. This portable device can
be used to confirm the rotation of any motor. See
1. Verify suction valve is 100% open.
2. Set discharge valve 10% to 20% open.
3. Check that valves in reverse circulation piping are open. Verify
that the correct restriction orifice is installed in the reverse
circulation line.
4. Switch on the pump for 3 to 5 seconds.
5. Check indication of TRC-1 hand-held rotation indicator. See
6. If direction of rotation is not correct, swap any two of the
electrical supply leads and repeat rotation check.
7. Once direction of rotation has been verified, stop the pump
and leave it for several minutes.
8. Once you have determined correct rotation, tag correctly
connected main power leads, in accordance with motor
lead markings.
3.2.3.c Rotation Check using Pressure & Amps
1. Open suction valve 100%.
2. Set discharge valve 10% to 20% open.
3. Check that valves in reverse circulation piping are open. Verify
that the correct restriction orifice is installed in the reverse
circulation line.
4. Switch on the pump for 3 to 5 seconds.
5. Note the motor amps and the discharge pressure at a pressure
gauge, which should be installed between the pump casing
and discharge valve.
6. Reverse any two of the three power leads and read the amps
and the pressure gauge again. The higher amps and pressure
is the correct direction of rotation.
7. Once direction of rotation has been verified, stop the pump
and leave it for several minutes.
8. 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.
Figure 3-1. Teikoku TRC Rotation Indicator
