Publicidad
Idiomas disponibles
Idiomas disponibles
EN
PVR SET
PVR is a pressure and vacuum test manifold built to the highest of standards for use in the HVAC/R industry.
The PVR is designed for use with oxygen free nitrogen (OFN) only.
• DO NOT USE FOR REGRIGERANT CHARGING
SAFETY
The JAVAC PVR should only be used by HVAC/R personnel qualified to the equivalent of NVQ level 2 City and
Guilds. It is essential that the correct Personnel Protective Equipment (PPE) should be worn at all times by the
engineer and any people present around the pressurised pipework and system.
This should include:
• Safety goggles
• Gloves
• Hard hat
• Safety shoes and appropriate work clothing i.e. overalls where possible
Failure to comply with health and safety guidelines could result in accidents, injury or death.
• Use only stainless steel braided hose for pressure testing (supplied)
• The nitrogen pressure applied to the PVR should NEVER exceed 50 bar
• Under NO circumstances should caps be fitted to the vacuum 1/4 flare fitting on the PVR
RISK ASSESSMENT
Before work commences a full risk assessment should be carried out in accordance with your countries/
regions Refrigeration Association Guidelines.
NITROGEN CYLINDER SAFETY
• When the cylinder is in use it should be stood up in an upright position and secured to a nitrogen trolley
(available from JAVAC - part no NIT02).
• A suitable nitrogen regulator should be connected to the Nitrogen Cylinder before connecting to the PVR
(available from JAVAC - part no RS-750)
ONCE THE NITROGEN REGULATOR IS CONNECTED:
01. Ensure the nitrogen cylinder is secured upright on a cylinder trolley. Wind the regulator valve fully out - anti
clockwise. Connect nitrogen regulator to the cylinder.
02. Ensure that the system to be tested is empty of all refrigerant.
03. Connect the 1st supplied steel braided hose from the PVR 1/4" flare inlet fitting (centre) to the 1/4" flare
fitting on the nitrogen regulator and tighten.
04. Connect the 2nd supplied steel braided hose from the 1/4" flare pressure fitting (right) on the PVR to the
system to be pressurised. If the system is an R410A system with a 5/16" flare, please use the 1/4" x 5/16"
adaptor (supplied).
05. Ensure the vacuum side of the PVR is fully wound in (closed) and the pressure side of the PVR is fully
wound out (open).
06. Open the nitrogen cylinder valve.
2
07. Slowly wind the nitrogen regulator valve clockwise to pressurise the system. Pressurise the system in
stages of no more than 3 bar (45 psi) at a time.
08. If for any reason nitrogen passes into the vacuum gauge a 0.5 bar safety relief valve is fitted so to avoid
avoid any damage to the vacuum gauge.
09. Once the nitrogen pressure is set to the manufacturers system and pipe work pressure testing guidelines,
align the red set point indication pointer to the pressure reading. This will improve accuracy when
monitoring for a pressure drop from any small leaks.
10. Listen to the system and pipe work for audible pressure leak and monitor gauge for pressure loss.
11. Once pressure is set, close the nitrogen cylinder valve and close the pressure valve on the PVR. This will
isolate the pressure between the PVR and the system.
12. Wind out the regulator valve on the nitrogen regulator and disconnect the hose between the regulator and
pressure.
13. The nitrogen cylinder and regulator can now be removed from the testing area.
14. Maintain the system at the desired testing pressure for the duration of the leak and strength test.
15. Test each joint with leak detection spray or a JAVAC Ultrasound Whisper Leak Detector.
16. If leaks are found, do not repair the leak while the system is under pressure. Release and vent the nitrogen
pressure first.
17. If a leak is discovered and repaired, repeat the pressure testing process.
DO NOT EXCEED THE MAXIMUM WORKING PRESSURE OF THE PVR SET AT 50 BAR, DOING THIS
CAN CAUSE SERIOUS DAMAGE TO THE PVR AND POSSIBLE INJURY TO THE PERSONS INVOLVED.
VENTING THE NITROGEN
01. Once pressure testing is complete, to vent the system, ensure the vacuum side of the PVR is closed and
1/4" flare inlet fitting (centre) is free from any caps and obstructions.
02. Ensure the 1/4" flare inlet fitting (centre) is pointing away from any body parts and directed at the floor.
03. Ensure when venting, it is in a well-ventilated area and not a confined space to avoid asphyxiation.
04. Slowly open the pressure valve of the PVR and monitor the release of the pressure through the vent.
05. Once vented, close all valves and disconnect all hoses.
PRESSURE TEST IS NOW COMPLETE
VACUUM PROCESS
01. Ensure the pressure valve side of the PVR is closed and the vacuum valve is closed.
02. Ensure the system to be evacuated is free from refrigerant and nitrogen.
03. Connect the stainless-steel hose from the 1/4" inlet fitting to your vacuum pump.
04. Connect the yellow 72" vacuum hose from the 1/4" flare vacuum fitting to the system to be evacuated. If
the system is R410A with a 5/16" flare fitting, use 1/4" x 5/16" adaptor supplied.
05. Ensure all connections are tight to avoid a leak.
06. Switch the vacuum pump on and slowly open the vacuum valve on the PVR and monitor the indicator pull
down.
07. Once your desired vacuum is achieved, shut the vacuum valve. Align the set point indicator to the vacuum
reading. This will help to check the vacuum has held on a pressure rise test.
3
Publicidad
