8
Figure 3
Figure 3. charging chart for 2 - 5 ton units
S4Be-024-060 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)
S4BE / SA4BE Charging Chart
Add refrigerant if
below the curve.
Remove refrigerant
if above the curve.
Do not add or remove refrigerant if
pressure reading is between unit
curves and saturation curve.
1.5, 3, 5 TON MODELS
2, 2.5, 3.5, 4 TON MODELS
R-410A SATURATION
application notes for using the charging chart
• 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 chart is 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.
Before using this chart, make sure the unit is in a stable
ideal system sub-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).
