Step 3 - Separate Machine Components; Separate Cooler And Condenser; Remove The Controls/Drive Enclosure - Carrier AquaEdge 23XRV Installation Instructions Manual

ADDITIONAL PLUG CN3
(NOT SHOWN)
CONNECTS VFD RS485
COMMUNICATION
TO PIC6 J10 (MODBUS).
ADDITIONAL CN4
(RUN PERMISSIVE)
HARNESS NOT SHOWN.
Fig. 26 — Control Panel Connectors
Step 3 — Separate Machine Components
The design of the 23XRV chiller allows for disassembly at the job-
site so that the individual chiller components may be moved
through existing doorways. Use the following procedures to sepa-
rate the machine components.
Unit disassembly should not be performed in a condensing envi-
ronment or corrosive environment that could result in internal cor-
rosion or damage to the equipment.
If the sections of the unit are going to be disassembled for more
than 8 hours or exposed to humidity levels that will result in inter-
nal corrosion, the sections should be sealed and pressurized with
nitrogen.
The disassembled sections should be stored in a location with four
walls and a roof that is protected from the outdoor conditions.
Suggested locations to cut piping will minimize the width of the
condenser/economizer assembly.

SEPARATE COOLER AND CONDENSER

IMPORTANT: If the cooler and condenser vessels must be sep-
arated, 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.
NOTE: For steps 1 through 13 refer to Fig. 18 for units with Q or
R compressors, or Fig. 19 for units with P compressors. The cool-
er in Fig. 18 has been removed from the picture to show the pipes
and lines that must be cut.
Check that the holding charge has been removed from the chiller.
1. Place a support plate under each tube sheet to keep each ves-
sel level (does not apply to units with P compressor).
2. Remove cooler relief valve and relief valve vent piping
(cooler not shown in Fig. 18 or 19, see Fig. 3, 4, or 5).
3. Cut the motor cooling refrigerant drain line (see Fig. 18, item
4) (does not apply to units with P compressor).
4. Unbolt and rig the suction elbow off (does not apply to units
with P compressor) and disconnect the compressor suction
line at the cooler and compressor. Remove bolts from the
vaporizer vent line flange.
5. Cut the VFD cooling drain line (see Fig. 18, item 11) (does
not apply to units with P compressor).
6. Cut the oil reclaim line(s) (see Fig. 18, item 12, or Fig. 19,
item 10).
7. Cut the hot gas bypass line between the HGBP (hot gas
bypass) solenoid valve and cooler feed line (see Fig. 18, item
10, or Fig. 19, item 11).
8. Cut or unbolt the cooler liquid feed line (see Fig. 18, item 9,
or Fig. 19, item 3), near the economizer or condenser float
chamber at the flanged connection. For economized units
with Q or R compressors, temporarily secure the in-line econ-
omizer orifice plate to the economizer flange.
9. Cut the vaporizer refrigerant return line as shown (see
Fig. 18, item 13, or Fig. 19, item 8).
10. Disconnect all sensors with cables that cross from the con-
denser side of the machine to the cooler side including:
a. Evaporator refrigerant liquid temperature sensor. See
Fig. 20.
b. Entering and leaving chiller liquid temperature sensors.
See Fig. 21.
c. Evaporator pressure sensor (not shown).
11. Disconnect the tubesheet mounting brackets from the vessel
connectors on the tube cooler tubesheet.
12. Cover all openings.
13. Rig the cooler away from the condenser/compressor.
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.
Do not rig the condenser before the control center and com-
pressor are removed. The condenser/compressor assembly has
a high center of gravity and may tip over when lifted at the
tubesheet rigging points, which could result in equipment
damage and/or serious personal injury.

REMOVE THE CONTROLS/DRIVE ENCLOSURE

Confirm that the power supply disconnect is open and all safety
procedures are observed before removing the VFD. This proce-
dure minimizes the number of sensors and cables that need to be
disconnected.
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 oxy-
gen, causing asphyxiation.
1. For Q and R compressors, close the 2 filter drier isolation
valves (Fig. 22) and the 2 VFD isolation valves. Isolate the
refrigerant charge into the condenser to prevent a refriger-
ant leak if one of the motor terminals is accidentally dam-
aged during VFD removal or installation. For Q and R
27
CAUTION
WARNING