Operating procedures – Robinair 16910 ID Plus Refrigerant Identifier User Manual

Page 17

Operating Procedures

3. The instrument reads REMOVE PURGE CAP, CON. HOSE, PRS A. This message

instructs you to remove the cap installed on the purge vent port, and replace it with the

purge vent hose. Direct the free end of the hose away from the instrument so escaping

gasses are not directed back towards the instrument. When the hose is securely

connected, press the “A” button to continue.

4. The instrument reads NOW AIR IS XX.X% PURGING TO XX%. This message

indicates the purging procedure has begun and displays the purge limit setting.

NOTE: The purging procedure may be halted or cancelled at any time by pressing

and holding either the “A” or “B” buttons during the procedure. When either button

is pressed and held, the instrument displays PURGE STOPPED, PRESS A TO CONT.

B TO EXIT. To end the purge process, press the “B” button. To continue with the

purge procedure, press the “A” button. In either case, the instrument performs a

self-calibration and either continues with the purge procedure or prompts you for

another run. If the purge process has been stopped, and “B” was selected (exit purge

process), you must replace the cap on the purge port and disconnect the service end of

the sample hose.
Not Pure Alarm: If the instrument detects that the level of R-12 or R-134a is not at

least 98% by weight, an alarm sounds and the purging process is halted. If the alarm

sounds, press “B” to continue. The purge procedure is cancelled, and the instrument

reverts to self-calibration, ready for a new procedure.
Excessive Air Alarm: If air contamination is detected to be 25% by weight or greater,

an alarm sounds and you are asked if the purge procedure should continue. Press

the “A” button to re-calibrate and continue purging; press the “B” button to revert

to calibration and a new procedure. The excessive air alarm is included as a safety

measure to prevent high losses of refrigerant. The purging of air from such high levels

down to 2% requires high losses of refrigerant vapor.