ROTHENBERGER Digitales Monteurhilfe Set - Manual (Page 13)

ENGLISH 11
Setting vacuum optional
 Connect the vacuum sensor cable to the manifold and turn the unit
on.
Note: To disconnect the vacuum sensor cable be sure to press the
release latch under the connector cable. Pulling on the cable without
disengaging the latch will cause damage and is not replaceable
under warranty (see fig1).
 Press the VACUUM button. This will phase out the temperature display and only show the vacuum
units.
 Press the SELECT button until the desired vacuum unit is displayed .
 Press ENTER to confirm.
The vacuum display will go off after 15 minutes automatically.
 Press the ON/OFF button and VACUUM button to turn the unit on . Allow 30-45 seconds for the
sensor to warm up and the correct vacuum reading to appear . (If pressure, temperature or deep
vacuum is being used for extended periods of time turns the unit off and turns back on
again when reading is required.)
Important notes for servicing AC/R system
A system that has been opened or one that is found to be excessively low on refrigerant pressure as a
result of a leak, must be fully evacuated by means of recovery/recycling and deep vacuum.
A system that has been evacuated must be repaired, leak tested and evacuated again before charging.
Diagnosing the system pressure and temperature
1. Make sure both valves on the manifold are closed (turn knobs clockwise) .
2. Connect the blue and red hose from the low and high side of the manifold to the system.
3. Start the system and allow some time for the true pressure reading on the manifold to appear and
stabalize.
Charging
1. Verify that both valves on the manifold are shut completely.
2. Turn the system on.
3. Connect the other end of the yellow hose to Refrigerant Gas supply. (Follow refrigerant
manufacturer’s instructions for proper dispensing.). Use an electronic scale for accurate charging
4. Open manifold low side (blue) valve slowly and start charging.
5. When charging is .nished, close the valve on the tank and allow some time for the refrigerant to be
evacuated from the hoses and manifold.
6. Close the low side valve and disconnect the hose(s) from the system.
fig. 1