Trane Manhattan Gen II Installation, Operation And Maintenance Manual page 56

Maintenance Procedures
6. Tighten the suction and discharge unions using large
adjustable wrenches or pipe wrenches. To minimize
the torque on the piping, apply an equal and opposite
force to the pipe fitting with an additional adjustable
wrench or pipe wrench.
Note: Always use a second, counter, wrench, when
performing plumbing tasks to firmly hold the
fittings or joint while loosening the tightening
the opposite side.
7. Position the conduit into the knockout of the electrical
box cover.
8. Fasten the conduit to the box with the ring nut.
9. Reconnect pump electrical connections exactly as they
were notated at removal.
10. Replace the cover onto the electrical box on the side of
the pump motor. Ensure gasket is in place prior to
replacing cover.
11. Reconnect the nut 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 ensure 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
56
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.
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, and take to shop
bench.
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.
CAUTION
!
Wash hands thoroughly prior to installing the new seal.
Even a small piece of grit or dirt can damage the pump
seal. It is suggested to put on latex gloves after all parts
have been cleaned and prepped. Do not touch seal with
bare skin or allow any grease to come into contact with
new seal.
Note: It is highly recommended that you gather seal
replacement procedural information for your
particular pump make & 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.
ARTC-SVX002A-EN