Rig Machine Components - Carrier AquaEdge 19XRV Installation Instructions Manual

RIG MACHINE COMPONENTS — Refer to instructions
below to disassemble a chiller with an LF2 442A or 608A
VFD or Standard Tier VFD (230, 335, 445, 485, 550, 605,
680A). Special instructions for chillers with a 900A or 1200A
LF2 VFD or Standard Tier VFD (765, 855, 960, 1070, 1275,
1530A) are on pages 34-39.
Disassemble a Chiller with a 442A or 608A LF2 VFD or
Standard Tier VFD (230, 335, 445, 485, 550, 605, 680A)
IMPORTANT: Only a qualified service technician should
perform this operation.
WARNING
Do not attempt to disconnect flanges while the machine is
under pressure. Failure to relieve pressure can result in per-
sonal injury or damage to the unit.
CAUTION
Before rigging the compressor, disconnect all wires enter-
ing the power panel to avoid unit damage.
Remove the VFD Enclosure — Confirm that the power supply
disconnect is open and all safety procedures are observed
before removing the VFD. This procedure minimizes the num-
ber of sensors and cables that need to be disconnected.
WARNING
Do not attempt to remove the VFD without first closing the
refrigerant isolation valves. Failure to do so during VFD
removal will result in an uncontrolled refrigerant leak. A
refrigerant leak can damage the unit as well as displace
oxygen, causing asphyxiation.
1. Close the 2 filter drier isolation valves and the VFD
refrigerant drain isolation valve. Evacuate the VFD cold-
plate through the Schrader valve next to the filter/drier.
2. Remove any field wiring conduits that bring power to the
VFD.
3. Remove the terminal box transition piece.
4. Label and disconnect the motor leads from the motor ter-
minals. Note the position of the motor terminal cable lugs
so they can be reinstalled with sufficient clearance away
from the surrounding structure.
5. Remove the motor ground lead. Note the position of the
ground lead so it can be reinstalled with sufficient clear-
ance away from the surrounding structure.
6. Label and disconnect the power cables, interlock cable,
and communication cable between the VFD enclosure
and the power panel.
7. Remove the access panels on the back of the VFD enclo-
sure and disconnect the VFD cooling lines. Cover all
openings.
Lifting the VFD — Care should be used to prevent damage due
to dropping or jolting when moving the VFD. A fork truck or
similar means of lifting and transporting may be used. Sling
the VFD in a manner that will equalize the load at the pickup
joints. Use a spreader bar if the angle of the sling is less than
45 degrees relative to horizontal. Do not jolt while lifting.
Use the following procedure to lift the VFD:
1. Attach a sling to the four lifting holes in the lifting brack-
ets (lifting brackets are factory-installed on top of the
VFD enclosure). Make certain that the angle of the sling
is not less than 45 degrees relative to horizontal.
2. Using an overhead or portable hoist (minimum 2 ton rat-
ed capacity), attach a free-fall chain to the sling secured to
the drive. Take up any slack in the chain.
3. Rig the control center and remove the bolts that secure it
to the VFD mounting brackets on the condenser. See
Fig. 7.
NOTE: To reassemble, follow steps in reverse order. Connect
sensors and cables after major components have been secured
.
to reduce the risk of damaging them.
Fig. 7 — 442A and 608A LF2 VFD
To Separate Cooler and Condenser
NOTE: If the cooler and condenser vessels must be separated,
the heat exchangers should be kept level by placing a support
plate under the tube sheets. The support plate will also help to
keep the vessels level and aligned when the vessels are bolted
back together.
Remove all transducer and sensor wires at the sensor. Clip
all wire ties necessary to pull heat exchangers apart.
900A or 1200A LF2 VFD, Standard Tier VFD (765, 855,
960, 1070, 1275, 1530A) — Do not separate the cooler and
condenser until the VFD is removed. The VFD/condenser
assembly has a high center of gravity and may tip over
when the cooler and condenser are separated, which could
result in equipment damage and/or serious personal injury.
See pages 34-39 for special instructions on VFD removal
for these sizes.
1. Place a support plate under each tube sheet to keep each
vessel level (Fig. 8, Item 4).
2. Cut the refrigerant motor cooling line at the location
shown (Fig. 8, Item 2).
3. Disconnect the compressor discharge elbow at the com-
pressor (Fig. 9, Item 6).
4. Unbolt the cooler liquid feed line at the location shown
(Fig. 8, Item 8).
5. Cover all openings.
11
45°
MINIMUM
Enclosure Lifting Points
CAUTION
a19-1699