A-C Fire Pump 8200 Series - Manual (Page 23)

23
CHANGING ROTATION
WARNING: Rotating Components
Hazard
Do not operate pump without all guards in place. Failure
to follow these instructions could result in serious
personal injury or death and property damage.
8200 Series centrifugal pumps can be
operated clockwise or counterclockwise when
viewed from the coupling end of the pump. If
you wish to reverse the suction and discharge
nozzles; i.e., change rotation, this can be
accomplished with the same pump as follows:
1. Remove the impeller from the shaft, and
relocate the two impellers per Figure 10 for the
desired rotation. (Follow the disassembly
procedures given in this manual.)
2. With the rotating element out of the
casing, remove the casing from the base
and turn 180°. (Factory bases are drilled
for both rotations.)
3. Set the rotating element back in the
casing and reassemble the pump.
NOTE: The impeller and casing are in the
same relationship to each other as they were
originally. The shaft and motor are also in the
same relationship to each other as they were
originally. The suction and discharge are
offset, so the piping will need to be changed
to accommodate the new flange locations.
4. Reassemble the pump and realign the
coupling as called for in the alignment
instructions.
5. The rotation of the motor must be
changed by switching the motor leads.
NOTE: Unless the motor rotation is reversed
the impeller will run backward.
FIGURE 10 – CORRECT RELATIONSHIP OF THE IMPELLERS AND CASING
SUCTION
2ND STAGE
IMPELLER
DISCHARGE
1ST STAGE
IMPELLER
DISCHARGE
“A”
“A”
CW ROTATION
IMPELLER VANE
ORIENTATION “A-A”
SUCTION
CLOCKWISE ROTATION
VIEWED FROM THE COUPLING END
SUCTION
2ND STAGE
IMPELLER
DISCHARGE
1ST STAGE
IMPELLER
DISCHARGE
“A”
“A”
CCW ROTATION
IMPELLER VANE
ORIENTATION “A-A”
SUCTION
COUNTERCLOCKWISE ROTATION
VIEWED FROM THE COUPLING END