Manifold Gauge Set Instructions
Contents
1. FIC Air Conditioning Products Automotive Air Conditioning Manifold Gauge Sets Low Side Blue i R134a Manifold x an Gauge Set High Side Red Calibration j Low Side i Blue Hand Valve A we i Low Side Connected High Side Red Hand Valve v High Side Connected S To High Side To Low side ee Service Port Service Port ae Se n Auxiliary Port R12 Manifold Low Side Blue Gauge Set High Side Red Calibration Screw yo High Side Red Hand Valve ose Hanger f Auxiliary Low Side Conection Port High Side Connection To Low Side Service Port To High Side Service Port Caution These instructions are not for use with Hybrid Vehicles For instructions for servicing Hybrid Vehicles use Hybrid Vehicle manufacturer s service manual only Confirm system refrigerant type before servicing vehicle Cross contamination of refrigerants can cause damage to A C system service tools and equipment Do not blend refrigerants in a system or in the same container Do not breathe in A C refrigerants lubricant vapor or mist Exposure may irritate eyes nose and throat If accidental system discharge occurs ventilate area before continuing service Obtain health and safety information from refrigerant and lubricant manufacturers if required GENERAL MANIFOLD INFORMATION The right side of the manifold with the red hand valve is the high side the red gauge is the high pressure gauge2. The left side of the manifold with the blue hand valve is the low side the blue gauge is the vacuum pressure gauge Separate passages from the low and high side fittings to their respective gauges allow the technician to check pressure and vacuum reading whether the hand wheels are in the closed or open position The manifold body connects all three lower 2 ACME R134a or 4 SAE R12 22 fittings to each other by internal passages The red HIGH SIDE opens or closes the flow through the 1 2 Acme R134a or 1 4 SAE R12 22 fitting on the right side to the other two fittings provided the blue LOW SIDE is in the open position Note If gauges do not read 0 psi remove gauge face and adjust calibration screw to 0 psi Note Do not over tighten hoses on to manifold gauge set Caution Never open the high side valve on manifold gauge set when the A C System is operating x R12 A C Systems do not use R134a couplers to connect to the A C system On R12 systems disregard the references to R134a couplers below R134A SYSTEM OPERATION Connect the R134a service couplers to the proper color charging hoses Note You must use R134a quick couplers to connect to the manifold gauge set to the vehicle s R134a A C service ports For manual service couplers the coupler must be in the closed position before connecting to the appropriate vehicle s service port To close turn the knob on the top of the coupler counterclockwise until it stop
3. O THE ATMOSPHERE USE APPROPRIATE RECOVERY EQUIPMENT SYSTEM EVACUATION Connect the BLUE LOW side service hose to the A C system s LOW side service port Connect the RED HIGH side service hose to the A C system s HIGH side service port Connect the CENTER YELLOW charging hose to a vacuum pump If using manual R134a couplers after connecting the couplers to the A C system open the manual couplers by turning the knob on the top of the coupler clockwise until it stops 1 Open the HIGH and LOW manifold valves using the Red and Blue hand valves and start the vacuum pump 2 After evacuating the system according to the manufacturer s specifications close both the HIGH and LOW side hand valves and turn off the vacuum pump 3 Disconnect the YELLOW charging hose from the vacuum pump and connect it to the appropriate refrigerant container 4 You can now charge the A C system according to the manufacturer s specifications CAUTION Always connect hoses to the manifold gauge set and R134a couplers before connecting R134a couplers to the R134a service ports on the A C system to prevent refrigerant from escaping from open fittings and to prevent any from entering an evacuated system Never open the RED high pressure hand valve when the A C System is operating Charge with gas only never with liquid refrigerant After all connections have been made the refrigerant can be added through the low side on most systems Consult OEM capacity spec
4. he manifold 10 To disconnect the manual R134a coupler turn the knob on the R134a coupler counterclockwise until finger tight Slide the coupler sleeve up releasing the coupler from the vehicle s service port Remove the R134a couplers carefully from the system CAUTION HIGH SIDE QUICK COUPLER MAY BE EXTREMELY HOT 11 Replace protective caps on vehicle s service fittings Caution FJC manifold gauge sets should only be used by technicians trained or experienced in servicing A C systems FJC offers an Automotive Heating and Air Conditioning Manual part 2819 for information about servicing an Air Conditioning System Part 6002 Low Side Manual R134a Coupler Low Side Manual Coupler Control Knob Blue To open and e close Manual Service Coupler h e Y Fitting to Low Side refrigerant hose t LN 4 X gy VAT Outer Collar gt gt To R134a service port on vehicle Low Side Quick Coupler FJC Part 6006 To Low Side Refrigerant Hose Blue Part 6001 High Side Manual R134a Coupler High Side Manual Coupler 2 Control Knob Red To open and close Manual Service Coupler Fitting to High Side refrigerant hose Outer Collar To R134a service port on vehicle High Side Quick Coupler FJC part 6005 To High Side Refrigerant Hose Red Outer Collar
5. ifications Charging an Empty System 1 Vehicle engine must be not running and the A C system must be turned off 2 Make certain that the dispensing valve on the refrigerant source is in the closed position 3 Make certain that both the high pressure and the low pressure valves are in their closed position 4 Connect both high and low R134a couplers to the A C system s service ports If using manual R134a couplers open the couplers by turning the knob on the top of the coupler clockwise until it stops 5 Open valve on the refrigerant source 6 Open the low side valve on the manifold gauge set 7 Charge system until gauges read over 50 pounds of pressure 8 Close low side valve on the manifold gauge set 9 Both High Side and Low Side valves on the manifold gauge set must be turned off 10 Go to step 4 in Charging an A C System that is low on Refrigerant below 3 Charging an A C System that is low on Refrigerant 1 Make certain that the dispensing valve on the refrigerant source is in the closed position 2 Make certain that both the high pressure and the low pressure valves are in their closed position 3 Connect both high and low R134a couplers to the A C system s service ports If using manual R134a couplers open the couplers by turning the knob on the top of the coupler clockwise until it stops 4 Start the vehicle Insure adequate air flow enters through the front of the vehicle to avoid overheating 5 Turn on
6. s retract the coupler sleeve then push it on the appropriate service fitting then release the sleeve If gauge set 1s supplied with automatic quick couplers there is no knob present just retract the coupler sleeve and push on the appropriate service fitting Caution All R134a service couplers must be connected to a refrigerant hose and the refrigerant hose must be connected to a manifold gauge set with both low and high side valves in the closed position before connecting the R134a service couplers to an A C System Connect to A C System to Diagnose the A C System 1 Close all valves on the manual service couplers and manifold gauge set Connect the high side coupler which is connected to the red hose to the vehicle s high side service port and connect the low side coupler which is connected to the blue hose to the vehicle s low side service port 2 Start the vehicle then turn on the A C system and let it run until the gauge readings stabilize 3 If the gauge readings are within the manufacturer s specification and the A C system appears to be operating properly stop the A C system turn off the vehicle and disconnect the hoses from the system 2 4 If the pressure shown on the gauges differ from the manufacturer s specifications determine the problem and make the necessary repairs EVACUATING AND CHARGING AN A C SYSTEM Recover all refrigerant from the system using A C recovery service equipment DO NOT VENT REFRIGERANT T
7. the air conditioner Set controls for maximum cooling and high fan speed 6 Open the dispensing valve on the refrigerant source Keep the refrigerant source upright at all times so that refrigerant can only enter the hoses as a gas Allow the gas to flow into the system until the desired amount has been added or until the source container is empty USE OF AN ELECTRONIC SCALE FJC part 2845 and 2850 IS RECCOMMENDED FOR THIS OPERATION IF CHARGING WITH A 30 POUND CYLINDER Refrigerant will continue to flow as a gas as long as the pressure in the can is greater than the pressure in the system Getting the required refrigerant amount into the system may take several minutes Note If 12 ounce refrigerant cans are being used When changing refrigerant cans the BLUE SIDE low pressure valve on the manifold gauge must be tightened to its closed position before changing cans 7 To begin adding refrigerant with system running open the BLUE LOW side hand valve on the low pressure side of the manifold gauge set 8 When you have charged the system to manufacturer s specifications close the manifold s BLUE LOW side hand valve Let the compressor run and check the gauge readings to be sure the system is operating properly If not repair the system as required by vehicle manufacturer service manual 9 To disconnect the manifold when the system filled and operating properly close the BLUE LOW side hand valve and close the RED HIGH side hand valve on t
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