SWEEP CHARGE
PROCEDURE
Page 1 - 5
SWEEP CHARGE
EQUIPMENT & SAFETY
TANK OF LIQUID
REFRIGERANT
DO NOT:
• Drop or handle tank roughly
• Tamper with the safety valve
• Store the tank in direct sunlight
or in a damp location
• Heat the tank above 125 degrees
• Heat the tank with a torch
• Refill the tank
CHARGING SCALE
• Used to measure refrigerant
charge
CHARGING HOSE
• With ball type hand valve
• Should have low-lose adaptor
SWEEP CHARGE
EQUIPMENT & SAFETY
PURGING HOSE
• Used to purge sealed systems
• Should have low-loss adaptors
• For purging non-operating systems
CLAMP ON ACCESS VALVE
• Used to access the sealed system
for purging of the system
PROCESS TUBE ADAPTOR KIT
• Used to attach hand valves to
various sizes of tubing
LEAK DETECTION METHODS
• Bubble Solution
• Electronic Leak Detector
SWEEP CHARGE
EQUIPMENT & SAFETY
SWAGING KIT
• Used to flare tubing of the system
HEAT GUN
• Used to heat a non-operating
compressor
• Used to heat evaporator
• Used to heat refrigerant tank
BRAZING EQUIPMENT
• Oxy-Acetylene
• Double tip torch
BRAZING ALLOYS/SUPPLIES
• 15% Silfos
• 45% Silver Solder
• Flux
SWEEP CHARGE
EQUIPMENT & SAFETY
RECOVERY BAG
• Mark bag with type of refrigerant
• Never mix refrigerants
• Leave purge hose hooked to bag
• Fill & empty no more than 4 times
• Treat the recovery bag with care
• Holds 24 oz. of R12 or R500
• Holds 20 oz. Of R22 or R134a
DO NOT OVER FILL
THE BAG
SWEEP CHARGE
EQUIPMENT & SAFETY
STRIKER, TUBING CUTTER
INSPECTION MIRROR,
STEEL BRUSH, TRIANGULAR
FILE
HEAT TRAP PASTE
• Protects components or areas
that should not be heated
REFRIGERATION SANDING
CLOTH
TEFLON TAPE
TUBING BENDER
SWEEP CHARGE IN ACTION
R-12, R-22 or R134a
SWEEP CHARGE
PROCEDURE
Preparing the work area
ATTACHING A TEMPORARY ACCESS VALVE
(R12 & R134a SYSTEMS)
PURGING THE SEALED SYSTEM
WITH AN OPERATING COMPRESSOR
CONNECT BAG
& HOSE TO DRIER
WITH TEMPORARY
ACCESS VALVE
WARM
EVAPORATOR
START
COMPRESSOR
RUN FOR 8
MINS.
After 8 mins. remove hose &
shut down compressor
MAKE THE REPAIRS
PURGING THE SEALED SYSTEM
WITH A NON-OPERATING COMPRESSOR
CONNECT BAG
& HOSE TO HIGH
SIDE & LOW SIDE
WITH TEMPORARY
ACCESS VALVE
WARM
EVAPORATOR
CHECK BAG
FOR
CONTAMINATION
PURGE FOR 15
MINS. WHILE
HEATING THE
COMPRESSOR
After 15 mins. remove hoses &
MAKE THE REPAIRS
AFTER 12
MINS. BANG
COMPRESSOR
3 OR 4 TIMES
REPLACING THE DRIER
AND RELATED COMPONENTS
CUT INLET
BACK FLUSHING THE SYSTEM
Un-braze and isolate high-side components that will be back flushed. Remove
filter-drier from system.
Page 38-39
SWEEP CHARGE
PROCEDURE
Special Procedure
Note: Remove Valve Core When Heating Filter Drier
CHARGING THE SEALED SYSTEM
(Refrigerators, Freezers & Under-Counter Ice Makers)
Sweeping & Leak Check
HEAT
TANK
Never over 125
degrees
ZERO
SCALE
CONNECT TANK
& HAND VALVE
SLOWLY ADD
4 OZ OF
REFRIGERANT
CHECK FOR
LEAKS
START THE
COMPRESSOR
SWEEP FOR
3 MINS
CONNECT RECOVERY BAG PURGE FOR 5MINS.
CHARGING THE SEALED SYSTEM
(Refrigerators, Freezers & Under-Counter Ice Makers)
Final Charging
HEAT
TANK
Never over 125
degrees
CONNECT TANK
& HAND VALVE
SLOWLY ADD
SPECIFIED
CHARGE
REMOVE HAND VALVE
CLOSE REFRIGERANT TANK
WRAP TEFLON TAPE TO ACCESS VALVE
EPA Type 1 Certification Information
• Good for all products containing Five
pounds of refrigerant or less
• Covers all of Whirlpool’s refrigeration
products
• Open book NON proctored test with a
passing score of 84%
• Can be done online or by mail from
– Qwik Products online or by mail
$24.95
• Http://www.epatest.com/icor_e_home608.html
– Narda by mail only
– $35.00
800-394-8378
•www.epatest.com/icor_e_home608.html