Carrier AquaEdge 19MV, Start-Up, Operation And Maintenance Instructions Manual

Page: 16 / 68

16
Fig. 14 — 19MV Leak Test Procedures
MACHINES WITH REFRIGERANT CHARGE MACHINES WITH NITROGEN HOLDING CHARGE
LEAK TEST OF 19MV
1. ATTACH COMPOUND GAGE TO EACH VESSEL
2. NOTE AMBIENT TEMPERATURE GAGE READINGS
PRESSURE ON CONDENSER VESSEL IS
AT REFRIGERANT SATURATED
CONDITIONS (SEE REFRIGERANT
PRESSURE-TEMPERATURE TABLES)
COOLER PRESSURE READING IS
15 PSIG (103 KpA) OR HIGHER
PRESSURE ON CONDENSER VESSEL IS
AT REFRIGERANT SATURATED
CONDITIONS (SEE REFRIGERANT
PRESSURE-TEMPERATURE TABLES)
COOLER PRESSURE READING
BELOW 15 PSIG (103 kPa)
LEAK SUSPECTED
RECORD PRESSURES
RECORD PRESSURES
PERFORM LEAK TEST
NO LEAKS
FOUND
LEAKS
FOUND
IS EITHER
VESSEL AT 0
PSIG (0 kPa)
ADD REFRIGERANT UNTIL
PRESSURE IS ABOVE 35 PSIG
(241 kPa)
PERFORM LEAK TEST
LEAKS
FOUND
NO LEAKS
FOUND
LOCATE
AND MARK
ALL LEAK
SOURCES
RECOVER
REFRIGERANT
FROM VESSEL
PERFORM
STANDING
VACUUM TEST
RECOVER
REFRIGERANT
FROM VESSEL
PASS FAIL
REPAIR ALL
LEAKS
DEHYDRATE VESSEL IF VESSEL WAS AT
ATMOSPHERIC PRESSURE OR LOWER
CONTINUE WITH MACHINE STARTUP
PRESSURE READING IS LESS THAN 15
PSIG (103 kPa) BUT GREATER THAN 0
PSIG (0 kPa)
LEAK SUSPECTED
PRESSURE IS AT 15 PSIG (103 kPa)
RELEASE NITROGEN AND
EVACUATE HOLDING
CHARGE FROM VESSELS
ADD REFRIGERANT UNTIL
PRESSURE IS ABOVE 35
PSIG (241 kPa)
PERFORM LEAK TEST
LEAKS
FOUND
NO LEAKS
FOUND
RAISE PRESSURE TO 70 PSIG
(483 kPa) WITH NITROGEN
(IF USING ELECTRONIC
DETECTOR ADD GAS NOW)
PERFORM LEAK TEST WITH
SOAP BUBBLE SOLUTION,
ULTRASONIC, OR
ELECTRONIC DETECTOR
NO LEAKS
FOUND
LEAKS
FOUND
EVACTUATE
VESSEL
LOCATE
AND MARK
ALL LEAK
SOURCES
COMPLETE CHARGING MACHINE
RELEASE PRESSURE IN
THE VESSEL
REPAIR ALL LEAKS
RETEST ONLY THOSE
JOINTS THAT WERE
REPAIRED
NO
YES