Carrier 38VT 188CTST Series - Seasonal and Periodic Inspections; Troubleshooting Symptoms; Common Symptoms and Causes

– 13 –
Type
Pipe diameter
drawnwod tuo-warDdrawrof tuo-warD
Liquid Gas
19.1 28.6
Cut the L-shaped pipe at the horizontal
straight section, then braze the socket and
pipe procured locally.
Liquid pipe Gas pipe
Pipe
Section to
be cut
socket
Cut the L-shape pipe at the vertical straight
section, then braze the socket and pipe
procured locally.
Liquid pipe Gas pipe
Pipe
15 mm
Section to
be cut
socket
19.1 34.9
Cut the L-shaped pipe at the horizontal
straight section, then braze the socket and
pipe procured locally.
Liquid pipe Gas pipe
Pipe
Section to
be cut
socket
Cut the L-shape pipe at the vertical straight
section, then braze the socket and pipe
procured locally.
Liquid pipe Gas pipe
Pipe
15 mm
Section to
be cut
socket
* For drawing out downward, cut the pipe at the position of 15 mm above the brazing part.
CAUTION
Cloth
Valve at the
liquid side
Valve at the gas side
Torch
Wrap the valves at the gas and the liquid side in wet cloth to keep
it cool and prevent the heat from the torch from damaging it when
connecting the pipe to the valve on the gas and the liquid line.
Coupling size of brazed pipe
Connected section
External size Internal size
K
C
G
F
(Unit: mm)
Standard outer dia.
of connected
copper pipe
Connected section
Min. thickness
of coupling
External size Internal size
Min. depth of
insertion
Oval value
Standard outer dia.
(Allowable difference)
CFKG
6.35 6.35 (±0.03) 6.45 (±0.03) 7 6 0.06 or less 0.50
9.52 9.52 (±0.03) 9.62 (±0.03) 8 7 0.08 or less 0.60
12.70 12.70 (±0.03) 12.81 (±0.03) 9 8 0.10 or less 0.70
15.88 15.88 (±0.03) 16.00 (±0.03) 9 8 0.13 or less 0.80
19.05 19.05 (±0.03) 19.19 (±0.03) 11 10 0.15 or less 0.80
22.22 22.22 (±0.03) 22.36 (±0.03) 11 10 0.16 or less 0.90
25.40 25.40 (±0.04) 25.56 (±0.04) 13 12 0.18 or less 0.95
28.58 28.58 (±0.04) 28.75 (±0.04) 13 12 0.20 or less 1.00
34.92 34.92 (±0.04) 35.11 (±0.04) 13 12 0.24 or less 1.20
38.10 38.10 (±0.05) 38.31 (±0.05) 15 14 0.27 or less 1.35
41.28 41.28 (±0.05) 41.50 (±0.05) 15 14 0.29 or less 1.45
44.45 44.45 (±0.05) 44.68 (±0.05) 17 14 0.31 or less 1.55
53.98 53.98 (±0.05) 54.22 (±0.05) 17 16 0.32 or less 1.80
Selection of pipe materials and sizes
Selection of pipe materials
Materials : Phosphorus deoxidation seam-less pipe. Minimum wall thickness for R410A application.
Soft Half hard or hard OD (Inch) OD (mm)
Minimum wall
thickness (mm)
1/4" 6.35 0.80
3/8" 9.52 0.80
1/2" 12.70 0.80
5/8" 15.88 1.00
3/4" 19.05 1.00
7/8" 22.22 1.00
1" 25.40 1.00
1-1/8" 28.58 1.00
1-3/8" 34.92 1.20
1-5/8" 41.28 1.45
1-3/4" 44.45 1.55
2-1/4" 53.98 1.80
38VT022
38VT024
38VT026