Carrier 69NT20-531-300 manual 14.1, Valve Replacement, Replacing The Evaporator Fan Assembly

TABLE OF CONTENTS (cont)

SERVICE . .		. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6-1
6.1	SECTION LAYOUT		6-1
6.2	SERVICE VALVES		6-1
6.3.	MANIFOLD GAUGE SET		6-1
6.4	PUMPING THE UNIT DOWN		6-2
6.5	REFRIGERANT LEAK CHECKING		6-3
6.6	EVACUATION AND DEHYDRATION		6-3
6.6.1		General	6-3
6.6.2		Preparation	6-3
6.6.3		Procedure - Complete system	6-3
6.6.4		Procedure - Partial System	6-4
6.7	REFRIGERANT CHARGE		6-5
6.7.1		Checking the Refrigerant Charge	6-5
6.7.2		Adding Refrigerant to System (Full Charge)	6-5
6.7.3		Adding Refrigerant to System (Partial Charge)	6-5
6.8	COMPRESSOR - Model RSH105		6-5
6.8.1		Removal and Replacement of Compressor	6-5
6.9	COMPRESSOR OIL LEVEL		6-7
6.10	HIGH PRESSURE SWITCH		6-7
6.10.1 Replacing High Pressure Switch			6-7
6.10.2 Checking High Pressure Switch			6-8
6.11	CONDENSER COIL		6-8
6.12	CONDENSER FAN AND MOTOR ASSEMBLY		6-8
6.13	FILTER-DRIER		6-8
6.14	EXPANSION VALVES		6-9
6.14.1		Checking Superheat	6-9
6.14.2 Valve Replacement			6-9
6.15	EVAPORATOR COIL AND HEATER
ASSEMBLY			6-10
6.15.1 Evaporator Coil Replacement			6-10
6.15.2 Evaporator Heater Replacement			6-10
6.16	ECONOMIZER, UNLOADER, LIQUID INJECTION AND OIL RETURN SOLENOID VALVE		6-11
6.17	EVAPORATOR FAN AND MOTOR ASSEMBLY		6-11
6.17.1 Replacing The Evaporator Fan Assembly			6-12
6.18	EVAPORATOR FAN MOTOR CAPACITORS		6-12
6.18.1 When To Check For A Defective Capacitor			6-12
6.18.2 Removing The Capacitor			6-12
6.18.3 Checking The Capacitor			6-12
6.19	VALVE OVERRIDE CONTROLS		6-13
6.20	SUCTION MODULATION VALVE		6-13
6.20.1 Precheck Procedure			6-14
6.20.2 Checking The Stepper valve			6-14
6.21	CONTROLLER AND EXPANSION MODULE		6-14

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