Charging Procedures; Introduction; Proper R134A Charge; Proper Oil Charge - Carrier Transport Air Conditioning Installation Procedures Manual

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.

Table 8-1 SPLIT SYSTEM REFRIGERANT AND OIL CHARGING TABLE (THROUGH GEN 4)

Evaporator
Up to GEN 5
EM-1, EM-2, or EM-9
EM-1, EM-2, or EM-9
EM-6
EM-6
EM-1, EM-2, or EM-9
EM-1, EM-2, or EM-9
EM-3
EM-3
EM-3
EM-3
EM-14
EM-14
EM-17
EM-17
EM-17 Split System
IW-1
IW-2
IW-7
SECTION 8

CHARGING PROCEDURES

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
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.
Condenser
All Series
CM-2
CM-11
CM-2
CM-11
CM-3
CM-7
(2) CM-2 4.25 Pounds Each
(2) CM-7 6.25 Pounds Each
(2) CM-3 5.50 Pounds Each
(2) CM-7 6.25 Pounds Each
CM-2
CM-11
CM-5
KR-4
(2) CM-3 6.00 Pounds Each
4.25 Pounds Each
6.25 Pounds Each
5.50 Pounds Each
8--1
.
due to reduced
.
.
NOTE
Using oil other than that specified in Table 8-4
will void the compressor warranty.
Recommended
R134a Charge
5.00 Pounds
5.25 Pounds
4.00 Pounds
4.25 Pounds
5.50 Pounds
6.50 Pounds
3.50 Pounds
3.75 Pounds
19.0 Pounds
13.0 Pounds
thermal transfer
Recommended
Oil Charge*
10.0 Ounces
10.5 Ounces
8.0 Ounces
8.5 Ounces
11.0 Ounces
13.0 Ounces
8.5 Ounces Each
12.5 Ounces Each
11.0 Ounces Each
12.5 Ounces Each
7.0 Ounces
7.5 Ounces
Consult Factory
Consult Factory
12.0 Ounces Each
8.5 Ounces Each
12.5 Ounces Each
11.0 Ounces Each
T--311