DRS220 User’s Guide
14
HVAC Service
Because of its high stability and accuracy, the DRS220 is ideal for automotive, commercial,
and residential A/C refrigerant charging and recovery. Its high resolution also allows
accurate critical charging of small refrigeration systems such as commercial freezers.
To use the DRS220 for refrigerant charging, perform the following steps:
1. Press
to set the desired display units.
2. If desired, set up the Tank Capacity Mode as described in the Tank Capacity Mode
section. This will allow you to know at any time the percent of refrigerant remaining in
the refrigerant cylinder.
3. Carefully set the refrigerant cylinder on the weighing platform.
4. Attach the cylinder to the charging manifold via a utility hose. Open the cylinder valve
and purge air from the hose.
5. Program the desired refrigerant charge weight as described in the Programming
section. Activate the program by pressing
.
6. Open the manifold valve(s).
7. The display will indicate the weight charged as negative, indicating refrigerant is being
removed from the charging cylinder.
8. If the refrigerant cylinder empties while charging:
a. Close all valves.
b. Press
to “freeze” the display (as described in the Hold Mode Section).
c. Replace the empty refrigerant cylinder with a full one. Attach and purge hoses.
d. Press
to exit the Hold Mode.
e. Open manifold valve(s). Charging will continue from where it left off.
9. When charging is complete, the alarm will sound. Close all valves and press any key to
cancel the alarm.
NOTE:
The DRSCM Charging Module allows for automatic charging of HVAC systems.
Please refer to the DRSCM Charging Module User’s Guide for details.
DRS220 User’s Guide
15
Notes
