Charging Information - Carrier R-22 Application Manual And Service Manual

C
1
/
4
(6.4)
B
7
7
/
8
(199.9)
1
(5.56) DIA
/
4
2 REQ'D
1 3
(5.56 x 9.53) SLOT
/ x /
4 8
6 REQ'D
9
4 (105.2)
/
64
45
TYP
8 5 (205.3)
/
64
TYP
1
/
4
(6.4)
1
(3.45) DIA.
/
8
4 REQ'D
Each type of solenoid has an indicator flow arrow stamped on the
valve body. When solenoid is closed (not energized) and pressure
is applied in direction of flow arrow, complete shutoff occurs. If
pressure is applied against direction of flow arrow, leakage
through valve occurs. When determining proper installation of
valve within liquid line, 2 considerations must be made:
1. Direction of flow arrow
2. Where solenoid is installed in system.
TXVs can only be substituted for liquid-line solenoids in single-
flow air conditioning systems. Bi-flow TXVs allow liquid migra-
tion to coldest point during off cycles, which could allow liquid
into compressor.
Fig. 4 through 7 detail proper installation of liquid-line solenoid
and provide applications where TXVs may be substituted. Refer-
ence all notes of the appropriate figures.
Step 5—Charging Information
Weigh in appropriate refrigerant charge, then use the standard
practices of superheat-charging method for piston applications and
subcooling-charging method for TXV applications to confirm
7 3
7
/ /
8 16
(200.0) (4.6)
E
1
/
2
(12.7)
3
5
/
64
(128.0)
BAFFLE - LEFT
25
(10.0)
/
64
MAT'L: 20 GA STEEL
D
A
1
2
/
2
(63.5)
21
1 (42.1)
/
32
23
/
64
(9.2) J
5
2
/
64
(52.6)
57
4
⁄
64
(124.2) TYP
1
(12.7)
/
2
TYP
23
(9.2)
/
64
SUPPORT
MAT'L: 18 GA STEEL
J H
Fig. 2—Cube Units
1
(3.45) DIA
/
8
2 REQ'D
F
3
5
/
64
(128.0)
13
/
64
(5.4)
TYP
21
1 (42.1)
/
32
1
2
/
2
(63.5)
A
D
G
25
(10.0)
⁄
64
LEFT
SIDE
1
(5.56) DIA
/
4
2 REQ'D
correct charge. The standard charging methods can be found on
outdoor unit-information plate, in unit Installation Instructions, or
in the Service Manual. Since total system charge is increased for
long-line applications, it may be necessary to calculate the
additional refrigerant charge. Since long-line applications only
involve 3/8-in. liquid lines, the additional refrigerant charge
required is 0.6 oz of Refrigerant 22 (R-22) per ft of 3/8-in. liquid
line over 15 ft.
EXAMPLE:
To calculate additional charge required for a 25–ft line set:
25 ft – 15 ft = 10 ft X 0.6 oz/ft = 6 oz of additional charge
The rating-plate charge of a given outdoor unit is for a standard
application of 15 ft of interconnecting tubing. The rating-plate
charge can be found on outdoor unit-rating plate or in outdoor
unit-presale literature. Long-line applications do not require addi-
tional oil charge.
6
C
E
1
/
2
29
7 (200.8)
/
32
(12.7)
TYP
BAFFLE - RIGHT
MAT'L: 20 GA STEEL
1 3
(5.56 x 9.53) SLOT
/ x /
4 8
6 REQ'D
1 (5.56) DIA
/
4
4 REQ'D
AA
C
OUTDOOR
UNIT
BAFFLE ASSEMBLY
RIGHT
SIDE
SCREW
14 REQ'D
SUPPORT
3 REQ'D
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