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Maintenance Procedures
10. Replace the cover onto the electrical box on the side of
the pump motor. Confirm gasket is in place prior to
replacing cover.
11. Reconnect the fitting on the strain relief connector from
the motor housing using an adjustable wrench.
12. Open the ball valves on the suction and discharge
sides of the pump.
13. Restore power to the module by removing the lockout/
tagout equipment and turning the pump module
breaker back to the ON position.
14. Observe the newly installed pump to verify that all
connections have been seated and tightened correctly
and not leaking.
15. Turn pump on and record amp draws for your records.
Replace Pump Seal
Prior to servicing the pump, verify that the power to the
chiller is disconnected.
1. Confirm module power is OFF by testing with known
operational voltmeter. Once confirmed, install lockout/
tagout equipment to confirm power is not turned on
while service work is being performed.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
2. Remove electrical access cover on the pump motor.
3. Remove all electrical wiring and flex conduit from the
pump. Make sure to notate all connection points for the
re-installation.
Note: Be sure to document conductor/wire numbers
4. Close valves. There are isolation valves on the suction
and discharge sides of the pump as well as union
connections.
5. Using appropriate wrenches, slowly break loose the
union fittings at the suction and discharge piping.
Capture any escaping fluids encountered during the
pump change out process.
64
Notes:
•
Always use a second, counter, wrench, when
performing plumbing tasks to firmly hold the
fittings or joint while loosening the tightening
the opposite side.
•
A small quantity of water/glycol mixture will be
lost during this operation. Although propylene
glycol does not pose an environmental hazard,
it is the installers responsibility to adhere to
local codes and ordinances involving
hazardous fluids.
6. Loosen the four bolts that attach the pump base to the
frame with the appropriate size wrench or socket. Keep
up with rubber isolation boots for reuse on install.
7. Remove the pump from the chiller.
8. Remove insulation from the wet end of the pump to
allow volute cover access and removal.
9. Remove pump volute cover.
10. Remove retaining nut on shaft which secures seal.
11. Remove seal.
12. Remove back plate which will allow you to repair
/replace water slinger.
13. Install new water slinger rubber. Replace back cover.
NOTICE
Pump Seal Damage!
Do not touch seal with bare skin, or allow any grease
to come into contact with the new seal.
Even a small piece of grit of dirt can damage the pump
seal. Wash hands thoroughly prior to installing the
new seal. Latex gloves are suggested for handling of
parts after they have been cleaned and prepped.
Note: It is highly recommended that you gather seal
replacement procedural information for your
particular pump make and model.
14. Place the seal, sleeve, spring, and seal retainer onto
the shaft.
15. Position the pump impeller and secure into place with
the impeller retainer bolt.
16. Replace the volute cover with new o-ring and re-
insulate.
17. Re-install pump. Attach the mounting bolts to the frame
using a 1/2 inch wrench or socket.
18. Push the conduit and wires into the knockout on the
electrical box cover.
19. Attach the conduit to the box with the ring nut. Use a
standard screwdriver to secure the nut.
20. Secure the leads with crimp-type bell caps.
21. Reconnect pump electrical connections exactly as they
were notated at removal.
ARTC-SVX008A-EN
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