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2. Open the refrigerant container valve and inject liquid refrigerant into the initial charging
port as shown in Figure 27.
3. Charge with liquid refrigerant until 3 pounds of refrigerant per ton of system capacity, has
entered the system.
Liquid entering the system at the initial charging port goes directly to the system earth
loops, it does not go to the compressor. Should the pressures equalize and prevent the
intended charge from entering completely, terminate the process of initial charging. Note
and document the amount of refrigerant.
4. When the initial refrigerant charge (see step 3 above) has entered the system, close the
refrigerant container valve and disconnect the refrigerant hose from the initial charging
port. Note and document the amount of refrigerant.
5. The system has now been initially charged.
SD-410-QS (H) (06/15)
Figure 27. Initial Charge of SD(H) System
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