5-12. CHARGING THE REFRIGERANT SYSTEM. - Continued
Never introduce high discharge pressure into a refrigerant tank This can cause the tank
to rupture and injure personnel.
Never introduce liquid refrigerant into the suction shut off valve. This can cause damage
(10) Open refrigerant tank, compound gauge, and charge valves.
(11) Run refrigeration unit for 15 minutes and observe sight glass through left side door.
(a) Green or chartreuse center means refrigerant moisture content is acceptable.
(b) Yellow center means there is too much moisture m system Discharge (para 5-7), replace dehydrator
(c) Milky white or bubbly liquid means system has low charge.
(d) Clean bubble free liquid around center means the system is fully charged.
Never introduce liquid refrigerant into the low pressure (suction) charging valve. This
(12) If charge is low, set refrigerant tank to deliver gas only.
Never introduce high discharge pressure into a refrigerant cylinder. This can cause the
cylinder to rupture and injure personnel.
(13) Check that pressure gauge valve is closed.
(14) Open refrigerant tank, compound gauge, and charge valves.
(15) Charge until sight glass remains clear and bubble free for 15 minutes.
(16) When system is fully charged, immediately close refrigerant tank, compound gauge, and charge valves.