EarthLinked AVS-0030-A, Quick Start Instructions

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SD-410-QS (H) (06/15) Page 46
Figure 33. Many Bubbles-Inline Sight Glass
6. When suction pressure reaches 120 psig , observe the INLINE sight glass. If it is
either clear as shown in Figure 34, or has a trickle of bubbles as shown in Figure 35,
no additional refrigerant charge is required. Go to step 10.
Figure 34. Clear-Inline Sight Glass
Figure 35. Trickle of Bubbles-Inline Sight Glass
7. When suction pressure is 120 psig, there are still many bubbles in the INLINE
sight glass
, as shown in Figure 33, refrigerant must be added to the system through
the final charging port.
8. Observe the refrigerant flow in the INLINE sight glass. If the sight glass has
cleared, as shown in Figure 34, or there is a trickle of bubbles as shown in Figure 35,
the system is fully charged.
IMPORTANT!
Add refrigerant SLOWLY to the system through the final charging port.
Add no more than 8 ounces of refrigerant at a time and wait 10 minutes,
observing the INLINE sight glass to determine the refrigerant status,
before adding more refrigerant.