Carrier AquaEdge 23XRV, Installation Instructions Manual

Page: 28 / 68

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compressors, evacuate the VFD coldplate through the
Schrader valve (Fig. 22) on the VFD drain isolation valve.
2. Remove the shipping bracket between the VFD and the com-
pressor if it is still in place. See Fig. 23.
NOTE: For seismic units, do not remove the shipping
bracket.
3. Remove any conduits that bring power to the VFD.
4. Remove the nuts that secure the terminal box transition piece
to the motor housing.
5. Disconnect the motor leads from the motor terminals
(Fig. 24). Note the position of the motor terminal cable lugs
so they can be reinstalled with sufficient clearance away from
surrounding structure.
6. Remove the motor temperature sensor leads (Fig. 24), the
motor ground lead, and the bolts that secure the VFD enclo-
sure to the terminal box transition piece.
7. Disconnect the communication cables from the back of the
PIC6 (Fig. 25).
8. Disconnect the high pressure switch leads. Consult the wiring
diagrams in the section Make Electrical Connections
(page 47) for terminal block and terminals (they are depen-
dent on the drive type).
9. Unplug connectors CN1A, CN1B, CN2, CN3, and CN4
(Fig. 26).
10. Disconnect the control panel ground wire located next to con-
nectors CN1A and CN1B (see Fig. 26 for all compressors).
11. Disconnect the VFD cooling lines and cover all openings
(does not apply to units with P compressors).
12. Remove the 12 screws that secure the control panel to the
VFD enclosure. Tilt the control panel away from the back of
the control center.
13. Position the control panel on a safe surface and secure it in
place to prevent damage.
Lifting the Control Center
Care should be used to prevent damage due to dropping or jolting
when moving the control center. A fork truck or similar means of
lifting and transporting may be used. Sling in a manner that will
equalize the load at the pickup points. Use a spreader bar if the an-
gle of the sling is less than 45 degrees relative to horizontal. Do
not jolt while lifting.
Use the following procedure to lift the control center.
1. Remove the rubber hole plugs in the top of the control center
and fully thread in 4 eyebolts or swivel hoist rings (see
Fig. 27). Lifting hardware must have 3/4 in.-10 x 2 in. long
threads and must have a working load limit of at least 6000 lb
(2722 kg). Typical eyebolts are Chicago Hardware (size 28)
or Grainger (P/N 5ZA63).
2. Attach a sling to the 4 lifting eyebolts. Make certain that
the angle of the sling is not less than 45 degrees relative to
horizontal.
3. Using an overhead or portable hoist (minimum 2 ton rated
capacity), attach a free-fall chain to the sling secured to the
drive. Take up any slack in the chain.
4. Rig the control center and remove the bolts that secure it to
the VFD mounting brackets on the condenser (see Fig. 27).
5. Confirm that welding procedures comply with local Pres-
sure Vessel Codes before removing a portion of the VFD
support bracket from the condenser. Custom brackets
should be fabricated if part of the VFD supports must be cut
off of the condenser to reduce the width of the condenser
assembly. Clamp 1/4-in. plates over both sides of the VFD
bracket and drill 2 pairs of holes that straddle the line along
which the VFD brackets will be cut. This allows VFD brack-
ets to be reinstalled and welded in their original position.
NOTE: To reassemble, follow steps in reverse order. Connect sen-
sors and cables after major components have been secured to re-
duce the risk of damaging them.
Fig. 27 — Control Center Lifting Points
REMOVE THE DISCHARGE PIPE ASSEMBLY FROM
THE CONDENSER
NOTE: For steps 1 through 6 refer to Fig. 18 for units with Q, R
compressor, or Fig. 19 for units with P compressor.
The condenser relief valve and relief valve vent piping should
be removed if they will interfere with discharge pipe assembly
rigging.
1. Remove the discharge pipe assembly relief valve and relief
valve vent piping, if applicable.
2. Disconnect the compressor discharge temperature sensor.
3. Disconnect the compressor discharge pressure sensor and
remove the high discharge pressure switch.
4. Unbolt and rig the discharge pipe assembly off and remove
the bolts from the compressor discharge and condenser inlet
flange. Note the position and orientation of the discharge iso-
lation valve on the condenser inlet flange.
5. Remove the discharge pipe assembly.
6. Cover all openings.
NOTE: To reassemble, follow steps in reverse order. Connect sen-
sors and cables after major components have been secured to re-
duce the risk of damaging them.
3/4 IN. - 10 x 2 IN. LIFTING EYEBOLT WITH
SHOULDER OR SWIVEL HOIST RING
6000 LB (2722 KG) WORKING LOAD LIMIT
TYPICAL — CHICAGO HARDWARE P/N 28
GRAINGER P/N 5ZA63
45° M
IN
LIFTING
EYEBOLT