ICP DLF4AH09J1A, Service Manual

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SERVICE MANUAL R − 410A Ductless Split System: DLF4(A/H), DLC4(A/H)
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REFRIGERANT LINES
Refrigerant Line Routing
The refrigerant lines may be routed in any of the four directions
shown in Figure 4.
For maximum serviceability, it is recommended to have
refrigerant line flare connections and the drain connection on the
outside of the wall that the fan coil is mounted on.
As Viewed From Front
3 Left Exit
4 Left Rear
Exit
1 Right Exit
2 Right Rear Exit
(a)
(b)
A08281
Figure 10
-
Refrigerant Line Routing
Determine pipe hole position using the mounting plate as a tem-
plate. Drill pipe hole diameter per chart below. The outside pipe
hole is
½
in. (13mm) min. Lower than inside pipe hole, so it
slants slightly downward. See figure 5.
1/2 in. (13 mm)
Min.
INDOOR
OUTDOOR
A07371
Figure 11
-
Drill Holes
Hole SIZES
Unit Size Hole Diameter, In. (mm)
9K, 12K, 18K 2.2 (56)
24K, 30K, 36K 2.8 (71)
If piping is going through the right or left side:
Use a small saw blade to carefully remove the corresponding
plastic covering on side panel and drill the appropriate size hole
where the pipe is going through the wall. See table above.
Remove knockout 1 to run just the wiring. Remove knockout 1
and 2 or knockout 1, 2, and 3 if running both piping and wiring
through the side of the unit. See Figure 11.
NOTE: If required, a condensate pump is available for the
application.
General Guidelines
The units are shipped with full charge of R − 410A refrigerant. All
charges, line sizing, and capacitiies are based on runs of 25ft.
(7.6m). For runs over 25ft. (7.6m) consult long line section for
charge adjustments.
Refrigerant lines should not be buried in the ground. If it is ne-
cessary to bury the lines, not more than 36 inches (914mm)
should be buried. Provide a minimum of 6 inch (152mm) vertical
rise to service valves to prevent refrigerant migration.
Both lines must be insulated. Use a minimum of
½ inch
(12.7mm) thick insulation. Closed − cell insulation is recommen-
ded in al long − line applications.
Special consideration should be given to isolating interconnect-
ing tubing from the building structure. Isolate the tubing so that
vibration or noise is not transmitted into the structure.
Long Line Applications
No change in line sizing is required.
Add refrigeration per table below.
R − 410A Refrigerant Charge Table
Unit Size
Charge Amount *
LBS (kg)
Additional Charge Amount **
oz/ft (g/m) Metering Device ***
Cool Only Heat Pump Cool Only Heat Pump Cool Only Heat Pump Heat Pump
9K 2.64 (1.20) 2.64 (1.20) 0.16 (15) 0.22 (20) EXV EXV
12K 2.86 (1.30) 2.86 (1.30) 0.16 (15) 0.22 (20) EXV EXV
18K 3.09 (1.40) 3.09 (1.40) 0.16 (15) 0.22 (20) EXV EXV
24K 3.53 (1.60) 3.53 (1.60) 0.16 (15) 0.54 (50) EXV EXV
30K −−−− 5.29 (2.40) −−−− 0.54 (50) −−−− EXV
36K 5.30 (2.40) 5.73 (2.60) 0.54 (50) 0.54 (50) CAP EXV
* Charge is for piping that runs up to 25 ft. (7.6 m)
** For piping runs greater than 25 ft. (7.6 m), add this amount of charge per foot of extra piping, up to the allowable length, specified in the above table.
*** EXV
− Electronic Expansion Device
REFRIGERANT LINE LENGTHS ft. (m)
Unit Size
Max Line
Length
Max Elevation
(ID over OD)
Max Elevation
(OD over ID)
9K 50 (15) 33 (10) 33 (10)
12K 66 (20) 33 (10) 33 (10)
18, 24K 82 (25) 33 (10) 33 (10)
30, 36K 98 (30) 33 (10) 33 (10)