7
• This equipment’s cooling system contains
refrigerant under high pressure. always use safe
and environmentally sound methods when handling
refrigerant handling or servicing the unit. review
the factory literature and safety warnings prior to
servicing.
• When repairing system leaks, always use a nitrogen
(inert) gas to protect the refrigerant system and pressure
check the repair before re-charging. Always replace
the filter-dryers when performing any repair to the
refrigeration system with one capable of acid removal.
After completing the repairs, evacuate the system to
350 - 500 microns and weigh in the refrigerant to the
amount specified on the unit rating label.
• The refrigerant charging charts are valid for a variety of
indoor, return air conditions and are most influenced by
the outdoor ambient temperature, outdoor fan operation
and the unit operating voltage.
Figure 2. charging chart for 2 ton units
S6BF-024K Series (txV matches)
200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
75
80
85
90
95
100
105
110
115
120
125
130
135
Liquid Pressure
(psig)
Liquid Temperature (F)
S6BF-024K Charging Chart - Cooling
Add refrigerant when below curve
Remove refrigerant when above curve
Figure 2
Before using these charts, make sure the unit is in a
stable operating mode. As shown in
,
, &
cooling can vary over the range of operation. Reference
the charts to determine the ideal amount of sub-cooling
for a given liquid pressure. Units charged to other values
will not perform at the rated unit efficiency (EER) or rated
Coefficient of Performance (COP) in heating mode.
• To inspect a systems operation using quality instruments,
match the measured liquid temperature to the units
table. The measured liquid pressure reading should be
within 3% of the table value for most installations.
• For systems that are operating with more than a 5%
deviation, inspect the unit for the proper voltage and
phase balance and the refrigeration system for leaks.
• Units that are operating at less then 95% of the nominal
voltage or with a 2% phase imbalance may see a more
significant deviation than the amount stated above.
•
do not use the charts in systems that have a fan cycling
under low-ambient control. Refer to the low-ambient kit
instructions for more information (If applicable).
application notes for using charging charts
