Refco Apex Bedienungs- Und Wartungsanleitung Seite 5

Changeable piston type valves ensure perfect sealing. Glycerine-oil filled gauges are
equipped with a safety pressure relief in case of a pressure build up inside the gauge
due to a defect. The hoses can be hooked up to the hose anchors on the side and at the
front of the t-style for storage. This protects the hoses against contamination or damage.
Use of manifold:
Preparing
Before use ensure that the temperature scales on the manifold gauges match the refri-
gerants used in the system.
Adjust the gauge with the zero adjusting screw to zero. Position of the hand may vary and
might not point to zero depending on the atmospheric pressure. Readjusting the gauge
might therefore be necessary before each use of the manifold. The zero adjusting screw
is positioned either at the top or through the front lens depending on the type of manifold.
The different types of available manifolds are:
BM2, SM2, STAR, JUMBO-STAR ¨ lift plastic plug on lens ¨ screw on dial.
M2 , STAR, MK-2 ¨ screw on top of gauge (outside –"12-o-clock")
After adjusting replace the lens or the plastic plug.
Connecting the manifold to a system
• Connect blue hose (4) ¨ compound side of system
• Connect red hose (5) ¨ pressure side of system
• Connect yellow hose (8) ¨ vacuum pump
• Close both valves (6+7)
Evacuation of a system
• Turn on the vacuum pump
• Open both valves (6+7)
• Check pressure on compound gauge
• If vacuum reached close both valves (6+7)
Please note: The evacuation time may vary depending on the size of the sys-
tem. A minimal time span of 20 minutes must be reserved to evacuate a small
to middle sized system.
Filling of a system after evacuation
• Keep all valves closed. Disconnect the yellow hose from the vacuum pump and connect
this hose to a refrigerant container.
• Open blue valve (compound side)
• Open valve on refrigerant container. The system is now being filled with refrigerant.
Check the correct quantity of refrigerant with a charging scale like REFCO REF-METER-
OCTA and observe the pressure on the compound gauge. If the flow of refrigerant is too
slow or insufficient the compressor of the unit can be turned on to speed up the process.
Ensure that you fill vapour refrigerant only. Filling with full liquid may lead to damaged
components in the system.