Instruction Manual

Page 5
This procedure may be slow or fail to work if the internal
charge cylinder pressure is higher than the pressure in the
cylinder of new refrigerant. Check and purge air if necessary
(See Page 7).
Also, try putting a heat belt on the new refrigerant cylinder.
WEIGHT= XX.X LB
AUTOMATIC
?
5
>>>>
WEIGHT= XX.X LB
FILL CYLINDER
?
5
ENTER
CHECK HOSES
START
?
5
ENTER
WEIGHT= XX.X LB
COMPRESSOR ON
FILL COMPLETE
FILLED= XX.X LB
5
ENTER
*
HIGH PRESSURE
SEE MANUAL
**
CYLINDER FULL
GO TO CHARGE
5
FILLING THE CHARGE CYLINDER
Note: For large capacity or multiple A/C Systems where recharge will NOT
be done between successive recoveries, it may be desirable to skip
this procedure.
1. Setup the RHS780 as shown on Page 4 and then turn the Main Power
Switch ON.
Note: The RHS780 uses 37 lbs (17 Kg) of refrigerant when Filling the first
time. If the Refrigerant Cylinder is emptied the RHS780 will appear
to stop filling (the Weight will stop rising) and will stay in this
condition until the RESET key is pressed.
2. Using the Keypad, press the “Up Arrow” key four times to display
“WEIGHT= XX.X LB” “FILL CYLINDER?
5” and press the ENTER key.
The Display will read “CHECK HOSES” “START?
5”.
3. Open the LIQUID Valve on the Refrigerant Cylinder connected to the Fill
Port on the rear of the RHS780 with the Yellow Hose.
4. Press the ENTER key when ready to start filling the RHS780.
The Display will read “WEIGHT=XX.X LB” “COMPRESSOR ON”. When
the level is approximately 35 lbs (16 kg) the RHS780 will turn OFF, the
Display will read “FILL COMPLETE” “FILLED= XX.X LB
5” (the amount
of refrigerant removed from the cylinder) and the Attention Light will turn
ON. Close the Liquid Valve on the Refrigerant Cylinder.
Note: Press the RESET button on the Keypad to stop the
Fill Cylinder procedure at any time.
5. Press the ENTER key to return to the Main Menu.
* While filling the Charging Cylinder, this screen will display periodically
concurrent with the Attention Light turning ON. This is normal and
nothing to be concerned about. The screen should revert to normal
after a few seconds.
** This screen will display when the Charging Cylinder fills to capacity,
approximately 39.5 lbs (18 Kg). If this occurs, the Weight can be
lowered using the Charging procedure on Page 9 before the RHS780
can be used to recover more refrigerant. Press the ENTER key to
return to the Main Menu.
Note: The RHS780 Charging Cylinder can also be filled from the GAS or
VAPOR side of a cylinder by following the Recover/Recycle
procedure on Page 6.
Note: The RHS780 will use 1.1 Lb (0.5 Kg) more refrigerant than the
displayed value the very first time it is used or after performing a
Calibration Procedure in order to prime the internal components.
Note: The Yellow Hose can be removed from the Fill Port and connected
to either the Blue {Low side} or Red {High Side} Hose connection
port on the side of the RHS780 to allow recovering the refrigerant
left over in the Yellow Hose using the Recover/Recycle procedure
on Page 6.