Install Machine Supports; Install Standard Isolation; Motor Terminal Insulation (P Compressor) - Carrier 23XRV Installation Instructions Manual

5. Check all terminal connections for proper installation.
IMPORTANT: Do not insulate terminals until wiring
arrangement has been checked and approved by
Carrier start-up personnel. Motor terminals must be
insulated in acceptance with national and local electri-
cal codes.
Insulate Motor Terminals and Lead Wire Ends — Locate
heat shrink tubing (RCD P/N LF33MM114) over power
connections so that they are completely covered and
tubing is against motor housing. Shrink into position.
Slide foam tubing (3 in. inner diameter closed cell vinyl,
neoprene, or nitrile foam) part way over the heat shrink
tubing. Apply adhesive for closed cell foam insulation to
motor side end of the foam tubing and push tubing the
rest of the way over the terminal and against the sheet
insulation on the motor side. Secure the opposite end of
the foam tubing with a wire tie as shown in Fig. 39 and
40.
Alternate Insulation for Motor Terminals and Lead Wire
Ends — Insulate compressor motor terminals, lead wire
ends, and electrical wires to prevent moisture condensa-
tion and electrical arcing. Obtain Carrier approved insula-
tion material from RCD (Replacement Components
Division) consisting of 3 rolls of insulation putty and one
roll of vinyl tape.
a. Insulate each terminal by wrapping with one layer
of insulation putty (RCD P/N 19EA411-1102).
b. Overwrap putty with 4 layers of vinyl tape.
6. Orient PE/ground lug as shown in Fig. 41. Assemble in-
ternal/external tooth lock washer between the terminal
box frame and the PE/ground cable. Torque PE/
Fig. 40 — Motor Terminal Insulation (P Compressor)
WIRE
TIES
FOAM
INSULATOR
SECTION D-D
ground lug nut to 55 to 65 ft-lb (75 to 89 N-m). See sec-
tion H-H in Fig. 41 for PE/ground cable routing.
7. Center terminal enclosure frame over terminal box frame
assembly so the space between the frames is equal within
3 / -in. (5 mm) at the top and bottom. Use the slots in the
16
terminal enclosure frame. Adjust spacing between the
sides of the terminal enclosure frame and terminal box
frame assemblies by moving the control center to the left
or right.
8. Install O-rings on VFD refrigerant connections using
silicone grease. Tighten connector using two wrenches to
27 to 33 ft-lb (37 to 45 N-m). (See Detail A in Fig. 42.)
(Does not apply to units with P compressor.)
9. Evacuate all piping between the VFD and the VFD isola-
tion valves after assembly and tightening of VFD fittings.
Dehydration/evacuation is complete to equalize VFD
piping pressure with machine pressure if machine is
charged with refrigerant (see Fig. 42). (Does not apply to
units with P compressor.)
Step 5 — Install Machine Supports
IMPORTANT: Chiller housekeeping pad, anchor bolts
and attachment points to be designed by others in
accordance with all applicable national and local codes.
INSTALL STANDARD ISOLATION — Figures 43-47 and
show the position of support plates and shear flex pads, which
together form the standard machine support system.
Service clearance under the chiller can be enhanced if the
grout is not extended along the entire length of the heat
exchangers.
38
MOTOR TERMINAL
STUD NUTS
LOCK WASHER
a23-1711