—3—
RECOMMENDED TUBE DIAMETERS
* For tube sets between 50 and 175 ft, consult Residential Split System Long-Line Application Guideline.
CHECK-FLO-RATER® PISTON
* Piston listed is for any approved non-capillary tube coil combination. Piston is
shipped with outdoor unit and must be installed in an approved indoor coil.
UNIT
SIZE
LIQUID TUBE DIAMETER (IN.)
VAPOR TUBE DIAMETER (IN.)
0 to 50 Ft
Tube Length
Long-Line Applications*
0 to 50 Ft
Tube Length
Long-Line Applications*
(Maximum Diameter)
018, 024
3/8
3/8
5/8
3/4
030, 036
3/4
7/8
042, 048
7/8
1-1/8
060
1-1/8
1-1/8
UNIT SIZE—SERIES
PISTON*
IDENTIFICATION NO.
018-C, D
55
024-C, D
57
030-C, D
67
036-C, D
73
042-C, D
78
048-C
82
060-C
96
CERTIFICATION APPLIES ONLY
WHEN THE COMPLETE SYSTEM
IS LISTED WITH ARI.
M
A
N
U
F
A
C
T
U
R
E
R
CE
RT
IFIED
TO ARI
AS
C
O
M
P
L
Y
IN
G
W
IT
H
A
RI
STANDARD
21
0
U
N
IT
A
R
Y
AIR
CO
N
D
IT
IO
N
IN
G
EQUIPMENT
REGISTERED QUALITY SYSTEM
