Pump Tasks - Trane Manhattan Gen II Installation, Operation And Maintenance Manual

7. Reconnect compressor electrical connections exactly
as they were removed, crankcase heater, and high
pressure switch.
8. Replace the electrical and control panel cover securely.
WARNING
Hazardous Voltage!
During the compressor replacement procedure, it is
urgent to inspect the lockout/tagout throughout the
process to ensure that power is still OFF.
9. Restore power to the module containing the
compressor by removing the lockout/tagout in the
power distribution panel.
10. Energize the new compressor allowing it to run as long
as possible.
11. Observe and document the operating pressures of the
newly installed compressor. It is advised that the
expansion valve superheat adjustment be checked.

Pump Tasks

The following section applies to those chillers equipped
with a tank and pump module.
Remove Pump
Prior to servicing the pump or pump motor, verify that the
power to the chiller is disconnected.
1. The pump module breaker is found in the power
distribution panel. 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
new 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.
ARTC-SVX002A-EN
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.
7. Remove the pump.
8. Disconnect the piping stubs from the suction and
discharge connections on the old pump to be reused
on the new pump.
Install Pump
Verify that power is disconnected from the chiller.
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.
1. When installing the stubs from the old pump, apply a
minimal amount of thread sealant, such as Rectorseal
Tru-Blu with Teflon or equivalent, to the threads of the
suction and discharge pipe adapters and install the
adapters onto the new pump.
2. Position the pump over the mounting holes. Apply
anti-seize compound to the four mounting bolts,
washers, and nuts before installation. Tighten nuts
securely with 1/2 inch socket and wrench.
Note: Do not over-tighten compressor mounting
bolts as the threaded inserts could strip out in
the frame.
3. Loosely install the four mounting bolts onto the
mounting nuts on the chiller frame.
4. Align the pump suction and discharge unions onto the
piping connections and hand tighten.
Note: The pump suction pipe stub must be positioned
90 degrees to the right of the pump to mate up
to the union on the pump suction piping.
5. Fasten the mounting bolts to the frame using a 1/2²
wrench or socket. Be sure to reuse the rubber isolation
pads from the old pump.
Maintenance Procedures
55