MRO 3 & 4 MANUAL
46
98-0140
Rev. F
9.3
PUMP REPAIR
The following procedures are instructions for removing the pump from the unit.
Before replacing the pump, be sure the pump’s thermal overload has not tripped. Allow the
pump to sit at least 5 minutes to allow it to reset, then try to re-start the pump.
1. Turn off the water supply and the MRO. Unplug the power cord from the electrical
outlet and turn off the wall disconnect for the high voltage. If the high voltage cannot
be disconnected by a twist-lock plug, make sure there is a “lockout” placed on the
handle of the wall disconnect.
2. Remove the access panel, outer tier of membranes, and the Unistrut cross-brace
mount to gain access.
3. Disconnect the pump from the motor starter.
4. Disconnect the feed hose on the pump inlet by loosening the hose clamp on the inlet
elbow.
5. Disconnect the pump discharge hose from the brown connection on the 1
st
membrane
housing by loosening the fitting ferrule nut. Plug the feed connector on the membrane
housing.
6. Remove the clamp or tie-wrap securing the pump assembly and remove the assembly
from the cabinet. A new tie-wrap is supplied with the replacement pump.
7. Allow the pump assembly to fully drain before shipping (warranty replacement only).
9.4
INSTALLING A REPLACEMENT PUMP ASSEMBLY
The following procedures are instructions to install the replacement pump assembly:
1.
Place a new piece of foam rubber vibration isolator provided in the pump kit on each
support frame, and secure with the two small “zip” ties.
2.
Position the pump housing against the foam, and wrap the large plastic “zip” tie around
the pump assembly, through the 2 holes in the upper unistrut support frame, and draw
it tight to secure the pump assembly in proper position. Repeat for the lower “zip” tie.
Cut off excessive length of the “zip” ties.
3.
Connect the membrane feed tubing and pump pressure gauge tubing to the pump
housing outlet port (at the top), and tighten the ferrule nut.
4.
Connect the pump feed hose to the inlet of the pump by tightening the hose clamp.
5.
Connect the pump wires to the motor starter box by inserting the wires through the
Sealcon fitting on the bottom of the enclosure. Connect the green (ground) wire to the
threaded lug in the control box.
Summary of Contents for MRO3
Page 8: ...MRO 3 4 MANUAL 5 98 0140 Rev F SECTION 3 COMPONENTS AND SCHEMATICS 3 1 EXTERNAL FRONT VIEW...
Page 10: ...MRO 3 4 MANUAL 7 98 0140 Rev F 3 2 INTERNAL REAR VIEW...
Page 12: ...MRO 3 4 MANUAL 9 98 0140 Rev F 3 3 ELECTRICAL DIAGRAM MRO3 MRO4...
Page 13: ...MRO 3 4 MANUAL 10 98 0140 Rev F 3 4 FLUID DIAGRAM MRO3 MRO4...
Page 34: ...MRO 3 4 MANUAL 31 98 0140 Rev F FIGURE 6 2...
Page 35: ...MRO 3 4 MANUAL 32 98 0140 Rev F FIGURE 6 3...
Page 52: ...MRO 3 4 MANUAL 49 98 0140 Rev F SECTION 11 MRO3 4 SPARE PARTS LISTING...
