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8--1
T--311
SECTION 8
CHARGING PROCEDURES
8.1 INTRODUCTION
Charging is the process of calculating and then
introducing the correct amounts of refrigerant and oil
into the air conditioning system. Accurate charge levels
will result in optimum system performance and insure
the longevity of the system components.
8.1.1 Proper R134a Charge
.
A system overcharged with refrigerant operates under
high head pressure which can damage components. A
system undercharged with refrigerant will result in poor
system performance.
NOTE
An overcharged or undercharged system may
contribute to system compressor failure.
Calculations for determining the proper refrigerant
charge are based on component capabilities and liquid
line lengths as indicated on Carrier Transport Air
Conditioning charging tables. Refer to Table 8-1 or
Table 8-2 for the approximate refrigerant charge. Refer
to Table 8-5 to determine the exact refrigerant charge.
8.1.2 Proper Oil Charge
.
Accurate charge levels of oil with the refrigerant are also
critical to proper performance and component longevity.
A system undercharged with oil will result in reduced
compressor life due to lack of lubrication. A system
overcharged with oil will experience poor system
performance due to reduced thermal transfer
capabilities. Refer to Table 8-1 or Table 8-2 for the
approximate oil amounts. Refer to Table 8-4 for the
correct compressor oil type.
8.1.3 Liquid Charging
.
The practice of charging liquid refrigerant into the
suction side with the compressor running will damage or
destroy the compressor, as the liquid is not
compressible.
8.1.4 PAG And POE Oils
.
It is very important to use the lubricant type specified by
the compressor manufacturer. (Refer to Table 8-4).
Using oil other than the specified oil can result in
reduced performance and a reduction in compressor
life.
NOTE
Using oil other than that specified in Table 8-4
will void the compressor warranty.
Table 8-1 SPLIT SYSTEM REFRIGERANT AND OIL CHARGING TABLE (THROUGH GEN 4)
Evaporator
Up to GEN 5
Condenser
All Series
Recommended
R134a Charge
Recommended
Oil Charge*
EM-1, EM-2, or EM-9
CM-2
5.00 Pounds
10.0 Ounces
EM-1, EM-2, or EM-9
CM-11
5.25 Pounds
10.5 Ounces
EM-6
CM-2
4.00 Pounds
8.0 Ounces
EM-6
CM-11
4.25 Pounds
8.5 Ounces
EM-1, EM-2, or EM-9
CM-3
5.50 Pounds
11.0 Ounces
EM-1, EM-2, or EM-9
CM-7
6.50 Pounds
13.0 Ounces
EM-3
(2) CM-2
4.25 Pounds Each
8.5 Ounces Each
EM-3
(2) CM-7
6.25 Pounds Each
12.5 Ounces Each
EM-3
(2) CM-3
5.50 Pounds Each
11.0 Ounces Each
EM-3
(2) CM-7
6.25 Pounds Each
12.5 Ounces Each
EM-14
CM-2
3.50 Pounds
7.0 Ounces
EM-14
CM-11
3.75 Pounds
7.5 Ounces
EM-17
CM-5
19.0 Pounds
Consult Factory
EM-17
KR-4
13.0 Pounds
Consult Factory
EM-17 Split System
(2) CM-3
6.00 Pounds Each
12.0 Ounces Each
IW-1
4.25 Pounds Each
8.5 Ounces Each
IW-2
6.25 Pounds Each
12.5 Ounces Each
IW-7
5.50 Pounds Each
11.0 Ounces Each