Diagram for “push/pull” method – Robinair 25175B REFRIGERANT RECOVERY SYSTEM User Manual

Page 13

See page 9 of this manual for more information.

1. To start you must have a minimum of

5 lbs.of liquid refrigerant in the tank.

2. Put RECOVER/PURGE knob on RECOVER.
3. Start machine.
4. Open INPUT valve to liquid.
5. Throttle the output valve so that the output pres-

sure is 100 psi greater than the input pres-

sure, but never more than 300psi.

6. Run until tank is cold.

1. Put RECOVER/PURGE knob on RECOVER.
2. Open OUTPUT valve.
3. Open INPUT valve
4. When the scale stops rising close all ports.
5. Switch off the machine

SET-UP DIAGRAM FOR TANK

PRE OR SUB COOLING PROCEDURE

VAPOR

INPUT

OUTPUT

LIQUID

SYSTEM BEING

S E RV I C E D

OPTIONAL MOISTURE

SIGHT GLASS

A scale must be used to avoid over filling

the storage tank.

Push/pull method only works with large systems where the liquid is readily accessible. Do not use this
method on systems that contain less than 15 lbs. as it may not work.

The sight glass is used to provide a method of determining the moisture content and quality of a system’s
refrigerant.

CAUTION: When using the “Push/Pull” method, once the siphon is started, it can continue and overfill

the storage tank even if the tank is equipped with a float level sensor. The siphon can continue even when
the machine is turned off. You must manually close the valves on the tank and the unit to prevent overfill-
ing of the recovery tank.

DIAGRAM FOR “PUSH/PULL” METHOD

INPUT

OUTPUT

VAPOR

LIQUID