NAVAC N2A4A User manual

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MANIFOLD GAUGE
User ManualFailure to follow warnings could result in death or serious injury.
N2A4A

Parts and specificationsTechnical parameterOperation instructionMaintenanceSafety guide0101Safety Guide02030304CONTENTWARNINGDear User,Thank you for choosing NAVAC Product. For best result and right way to use it, please read this operating manual carefully before using. We suggest that you’d better keep this manual with the product or a place where you can easily find for later reference.1.11.21.31.41.51.61.71.81.91.101.111.121.13

Parts and Specifications0302NO.12345NO.678910NameNameHookHigh pressure gaugeCapZero adjusting screwSight glassHigh pressure valveLow pressure valveHose connectorLow pressure gaugeSheathTechnical parameterOperation Instruciton1. Pressure testingClose both valves.Connect blue hose to the low side of system, connect red hose to the high side of system.Run the system, read the testing pressure indicated on manifold gauges.After testing, turn off the system. Then disconnect the hoses from the system and open all valves, make sure not vent refrigerant into the atmosphere.In order to prevent venting the refrigerant into the atmosphere, you can use a NAVAC recovery machine to recover any refrigerant remained in the hoses or mainfold gauges.1.11.21.31.41.52. Evacuation of a systemConnect blue hose to the low side of system, connect red hose to the high side of system and connect yellow hose to vacuum pump.Open both valves.Turn on the vacuum pump.Check pressure on low pressure gauge for 3 to 5 minutes, if the desired vacuum is reached, close the valves and turn off the vacuum pump.Observe the pressure on the low-pressure gauge, if the pointer sticks to-30 inHg for 3 to 5 minutes, the system evacuation is completed. If not, repeat the steps from 2.2 to 2.4.2.12.22.32.42.5ModelRefrigerant TypeGauge DiameterPressure RangeHoseN2A4AΦ3-1/8"-30 inHg to 800 psi-30 inHg to 500 psiNo109R-134aR-22R-410AR-32

05043. Charging a system after evacuationKeep valve closed, disconnect the yellow hose from the vacuum pump and connect this hose to a refrigerant container.Open valve on the refrigerant container.Open the manifold valves. The system is now being charged with refrigerant. Check the correct quantity of refrigerant with a charging scale (such as a NAVAC NRS2i01 wireless scale), and observe the pressure on the gauge. If the refrigerant flow is too slow or insufficient, the system compressor can be turned on to speed up the process.If the correct charging amount has been reached, close valves.After testing, turn off the system. Then disconnect the hoses from the system and open all valves while making sure not to vent refrigerant into the atmosphere.3.13.23.33.43.5MaintenanceDo not apply excessive force when turning valves.Manifolds are high precision measuring instruments. After use, always store the manifold gauges in the carry case.For maintenance and repair of the manifold, contact authorized NAVAC distributors. Product warranty would be voided if it is disassembled by unauthorized individuals.1.11.21.3