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NOTE: When installing a liquid-line solenoid, the system may
require a minimum 60va low-voltage transformer.
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.
V. 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
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=6ozofadditional 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.
VI. 2–SPEED APPLICATIONS
Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. In long–line applications, 2–speed units are
handled basically the same way as the single-speed units. There are
2 major differences:
1. For tubing up to 100 ft:
Liquid tube diameters and refrigerant connection diameters
for all sizes are 3/8 in.
Vapor tube diameter for the 036 and 048 is 7/8 in.; 060 is
1–1/8 in.
Vapor refrigerant connection diameter for all sizes is 7/8 in.
DO NOT INSTALL EQUIVALENT INTERCONNECT-
ING TUBING LENGTHS GREATER THAN 100 FT.
2. Do not increase or decrease tubing sizes.
For other applications see the previous sections under Long-Line
Guidelines.
UNIT IDENTIFICATION
I. PRODUCT NUMBER STAMPED ON UNIT-RATING
PLATE
The unit product number has 16 positions containing groups of
numbers and letters that indicate specific information about the
unit. Listed below is the breakdown of the 16 positions.
Positions 1, 2, and 3—Product Series
Example:
A 500–series number indicates a split-system condensing unit and
a 600–series number indicates a split-system heat pump.
Position 4—Model Letters
New models are introduced with the letter A, and subsequent
model changes are identified by changing to the next letter, as B,
then C, and so forth.
Position 5—Electrical Characteristics
Example:
J—208–230, 1 Phase, 60 Hertz
N—208/230, 208/240, 1 Phase, 60 Hertz
P—208/230, 208/240, 3 Phase, 60 Hertz
E—460, 3 Phase, 60 Hertz
Q—220, 3 Phase, 50 Hertz
S—220/240, 1 Phase, 50 Hertz
Z—380/415, 3 Phase, 50 Hertz
Position 6—Fuel and Controls
Not applicable on condensing units or heat pumps, so the letter ’X’
is used to signify ’none.’
Positions 7, 8, and 9—Nominal Cooling Capacity (in thousands
Btuh)
Example: 036 = 36,000 Btuh or 3–ton capacity.
Positions 10, 11, and 12—Not applicable on condensing units or
heat pumps, so the number ’zero’ is used to signify ’none.’
Position 13—Brand Name
Example:
A—Common unit —U.S.A. Only
Position 14—Unit Series
New units are introduced with the letter A, and subsequent major
component variations, such as in compressor, fan motor, coil
circuitor size, etc., are identified by changing to the next letter, as
B, then C, and so forth.
TABLE 8—COMMON PISTON SIZES
CHECK-FLO-
RATER™
CHATLEFF
CHECK-FLO-
RATER™
CHATLEFF
— 32 65 65
— 33 67 67
35 35 — 68
— 36 70 70
— 37 — 71
38 38 73 73
— 39 — 74
40 40 76 76
— 41 78 78
42 42 80 80
— 43 — 81
— 45 82 82
46 — 84 84
— 47 86 86
49 49 88 88
51 51 — 89
52 52 90 90
— 53 — 92
55 55 93 93
57 57 96 96
59 59 98 98
61 61 101 101
— 62 104 104
63 63 109 —
TABLE 9—LIQUID-LINE SOLENOID KIT PART NUMBERS
TYPE OF VALVE PART NO.
Single Flow KAALS0101LLS
Bi-Flow KHALS0401LLS
—8—