User Guide

DS-220 User’s Guide
16
Applications
This section deals with specific applications for which the DS-220 may be used.
HVAC Service
Because of its high stability and accuracy, the DS-220 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 DS-220 for refrigerant charging, perform the following steps:
1. Press to select the WEIGHT weighing mode and 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 CM-500 Charging Module allows for automatic charging of HVAC system. Please
refer to the CM-500 Charging Module User’s Manual for details.