6-8
Evacuation and Cleanup of System
Refrigeration Maintenance and Service Operations
CRR-20 & CRR-40, September 1999
c.
Water-cooled Condenser-receiver Tank with one
sight glass (After 8/99):
• If the balls FLOAT in the sight glass at any time,
R-134a charge is OK.
• If the balls DO NOT FLOAT, R-134a charge may
be low.
3.
Operate the unit on MAXIMUM COOL for 5 minutes. If
necessary, place the unit in COOL using the REFRG/FC
HI (cool with high speed evaporator fans) command in the
controller Test menu.
a.
Standard Receiver Tank:
• If the balls DO NOT FLOAT in the sight glass at
any time, the R-134a charge is low.
• If the balls FLOAT ALL THE WAY TO TOP of
sight glass, the unit is overcharged.
b.
Water-cooled Condenser-receiver Tank with two
sight glasses (Before 8/99):
• If the BOTTOM sight glass balls DO NOT FLOAT
at any time, the R-134a charge is low.
• If the TOP sight glass ball FLOATS ALL THE
WAY TO TOP of sight glass, the unit is over-
charged.
c.
Water-cooled Condenser-receiver Tank with one
sight glass (After 8/99):
• If the balls DO NOT FLOAT in the sight glass at
any time, the R-134a charge is low.
• If the balls FLOAT ALL THE WAY TO TOP of
sight glass, the unit is overcharged.
NOTE: Inspect the unit for refrigerant leaks with
a reliable leak detector if the unit is low on R-134a
charge.
CAUTION: When adding R-134a to the unit, be
careful not to OVERCHARGE the unit:
• Standard Receiver Tank: When the balls float in
the middle of the sight glass, stop adding
refrigerant.
• Water-cooled Condenser-receiver Tank: When
the balls in the TOP sight glass float, stop
adding refrigerant.
Water-Cooled Condenser-Receiver Tank (Before
8/99) (Option)
1. Two Sight Glasses: Normal refrigerant level
Water-Cooled Condenser-Receiver Tank (After 8/99)
(Option)
1. Single Sight Glass: Refrigerant charge is OK if ball
FLOATS at any time
Содержание CRR-20
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