Just Better DV-29 User Manual

DV-29

MICRON GAUGE BLANKOFF TEST UNIT INSTRUCTIONS

Valve position pictured for Pressure Rise Test. Valve "A" to micron gauge is open and valves from manifold to "B" and "C" are "closed".

When charging, close this valve. Most micron gauges will not withstand high pressure.

Suggested Application When Charging Using Superheat Method:

With Valve "A" closed, remove Micron Gauge and attach Superheat Gauge. Bleed at Quick Coupler before charging.

Before making connection as pictured, close all Ball Valves before hookup. NOTE: If micron gauge has 1/4" male flare, use D10244 O-ring Swivel Coupler included.

Leak-Proof Test Unit Deep vacuum has it own unique properties which requires

leak-proof design in all the components including couplers and hoses. DV-29 unit with flexible metal hose and O-ring seal couplers is absolutely vacuum tight.

Pulling a Vacuum Open all valves and pull a vacuum. When the sensor

reads between 300 and 400 microns and only if compressor is in the vacuum, close valves to the high and

Hoses to Manifold

low side of the system, leaving the valve closest to the micron gauge open. You now have the micron gauge within the system to check for pressure rise.

Pressure Rise Test Wait for at least 5 to a maximum of 20 minutes to allow

system pressure to equalize. The reading you see at the end of this test will be very close to what you actually have in the system. A rapid rise during this test to atmospheric pressure indicates a leak, while a slower rise to around 1500 microns indicates moisture is present.

Form No. 10729-308

JB INDUSTRIES

630.851.9444 Printed in USA