Manual

5
HVAC/R
Service Products
REFCO Manufacturing Ltd. Telefon [phone]
Industriestrasse 11 Telefax [phone]
CH-6285 Hitzkirch (Switzerland) [e-mail] www.refco.ch
6. Press and release the ENTER button once. The manifold is now reset.
Do not attempt to reset/zero the manifold while under pressure or in a
vacuum as incorrect pressure readings will be displayed.
Connecting the manifold to a system
• Connectbluehose(1)→ compound side of system
• Connectredhose(2)→ pressure side of system
• Connectyellowhose(5)→ vacuum pump
• Closebothvalves(3+4)
Evacuation
• Turnmanifoldpoweron.
• PresstheVACbutton.
• Connecthoses.
• Switchonthevacuumpump.
• Openbothvalves(3+4).
• Checkvacuumdisplay.
• Whenthedesiredvacuumisreachedclosebothvalves(3+4).
• PresstheVACbuttonagaintoquitthisfunction.
Charging a system after evacuation
• Keepallvalvesclosed(3+4).
• Disconnect the yellow hose from the vacuum pump and connect this
hose to the refrigerant gas cylinder.
• Openvalvefromrefrigerantgascylinder.
• Openbluevalve(compoundside).Thesystemisnowbeingchargedwith
refrigerant. Check the correct quantity of refrigerant with a charging
scale (REF-METER from REFCO) and observe the pressure on the
compound side.
• Whenthecorrectllingquantityhasbeenreachedcloseallvalves.
• Afterthechargingprocesscheckthepressureonthehighpressureand
compound side of the unit.
• Disconnectallhosesfromthesystem.
• Openvalves(3+4).
Measuring by using the Superheat-Subcool function
• See“connectingthemanifoldtoasystem.”
• PlugintheexternalK-typethermocouple(6)ortheclampthermocouple
K- type (7) into the DIGIMON. (Jack on the right hand side of the shell.)
• InstalltheexternalK-typethermocouple(6)withanadhesivetapeoruse
the clamp thermocouple K-type (7) on the liquid or suction line.
• Choosetheapplicablerefrigerant.(See“Settingofrefrigerant.”)
• Activatingdisplayoftemperaturedifference:
Press SUPERHEAT/SUBCOO .
• To switch between superheat and subcool (liquid/suction line): Hold
ENTER and press SUPERHEAT/SUBCOOL.
VAC
VAC
ENTER
ENTER
SUPERHEAT/SUBCOOL
SUPERHEAT/SUBCOOL