Carrier HFC-134A installation instructions A23-1578, A23-1579COUPLINGS

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. 28.

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. 28. Assemble internal/external tooth lock washer between the terminal box frame and the PE/ground cable. Torque PE/ground lug nut to 55 to 65 ft-lb (75 to 89 N-m). See section H-H in Fig. 29 for PE/ground cable routing.

7.Center terminal enclosure frame over terminal box frame assembly so the space between the frames is equal within

3/16-in. (5 mm) at the top and bottom. Use the slots in the 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. 30.)

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. 30).

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 31 and 32 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.

a23-1578

Fig. 29 — Motor Ground Cable

SEE

DETAIL A

DETAIL A

FILTER DRIER

ISOLATION VALVE

VFD ISOLATION

VALVES (2)

FILTER DRIER

ISOLATION VALVE

VFD COOLING

LINE O-RING

FACE SEAL

a23-1579COUPLINGS

Fig. 30 — VFD Refrigerant Connectors

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