Carrier HFC-134A installation instructions Compressor Fastener Identification, A23-1572

Table 10 — Compressor Fastener Identification

COMPRESSOR FASTENERS	SIZE
Discharge Pipe Assembly to	1 in.-8 Grade 5 Hex Head
Compressor Discharge Flange
Suction Elbow to Compressor Inlet	7/8 in.-9 Grade 5 Hex Head
Compressor Mount to Condenser	3/4 in.-10 Studs (A-449)
Economizer Line	5/8 in.-11 Grade 8 Hex Head
Motor Cooling, Motor Drain, Oil Drain	M 12x1.75 Grade 10.9 Socket Head
Compressor Lifting Points (2)	M30x3.5 Threaded Holes
Stator Housing Lifting Point	M30x3.5 Threaded Hole
Discharge Housing Lifting Point	M30x3.5 Threaded Hole

1.Disconnect the oil supply line in two places (Fig. 23). Cap the oil lines and fittings.

NOTE: Compressor oil lines and fittings between the oil filter and compressor must be kept extremely clean to prevent obstruction of the compressor inlet bearing oil orifice. Cap all orifice lines and fittings during disassembly. The compressor inlet bearing oil orifice is located at the lubrication block on top of the compressor.

2.Disconnect the motor cooling inlet flange, the motor cooling drain flange, optional economizer vapor line flange, and bearing oil drain flange (Fig. 23). Remove the economizer muffler bracket.

3.Brace the end of the discharge pipe assembly closest to the compressor if it has not already been removed. Place an oil pan under the compressor flange to collect oil that may have accumulated in the discharge pipe assembly. Unbolt

the discharge pipe assembly from the compressor. It may also be necessary to loosen the bolts that attach the dis- charge pipe assembly to the condenser.

4.If the cooler has been removed, rig the suction elbow and unbolt the suction elbow at the compressor and vaporizer vent line flanges (see Fig. 12). If the cooler is still in place, it may be necessary to loosen the bolts that secure the suction elbow to the cooler.

5.Carefully remove the perforated insulation cutouts that cover the compressor lifting points. See Fig. 23. Replace the lifting shackle thread protector after the compressor is re-installed to prevent insulation adhesive from fouling the threads.

6.Rig the compressor with lifting eyelets installed in the two M30 threaded holes provided in the top of the com- pressor housing (Fig. 23). Use only M30 forged eye bolts or M30 hoist rings with a sufficient working load limit to safely lift the compressor. The rubber vibration isolators may pull out of the compressor mounting bracket when the compressor is lifted off of the condenser. Applying leak detection soap solution to the outside of the vibration isolators will make it easier to press the isolators back into position.

7.Cover all openings.

NOTE: To reassemble, follow steps in reverse order. Connect sensors and cables after major components have been secure to reduce the risk damaging them.

	OIL SUPPLY LINE
	FITTINGS
DISCHARGE	M30 COMPRESSOR LIFTING
	SHACKLE HOLES
PIPE ASSEMBLY
BOLTING	MOTOR COOLING INLET FLANGE
FLANGE
ECONOMIZER	ECONOMIZER VAPOR
MUFFLER	LINE FLANGE
BRACKET

MOTOR COOLING

DRAIN FLANGE

SUCTION ELBOW

FLANGE

VAPORIZER VENT

LINE FLANGE

ECONOMIZER MUFFLER (OPTIONAL)

BEARING OIL

DRAIN FLANGE

a23-1572

Fig. 23 — Compressor Removal

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