1.In order to align the drain hose and drain cap, be sure to insert securely and vertically. Incline insertion will cause water leak- age.
2.After removing drain hose, be sure not to forget mounting drain cap.
3.Be sure to fix the drain hose with tape to the bottom of piping.
4.Prevent drain water from freezing in low temperature environ- ment.
When installing indoor unit’s drain hose outdoors, necessary mea- sure for frost protection should be taken to prevent drain water freezing.
•Under low temperature environment (when outdoor tempera- ture under 32 °F), after cooling operation is executed, water in the drain hose could be frozen.
•Once drain water is frozen, the drain hose will be blocked and water leakage may result from indoor unit.
DRAIN PIPING
•If the extension drain hose has to pass through a room, make sure it's wrapped with commercially sold insulation.
•The drain hose should point downward for easy drain flow.
•If the drain hose provided with the indoor unit is too short, make sure you connect it with a
•When connecting the drain hose to the hard vinyl chloride pipe, make sure it's inserted securely into the pipe.
DRAIN HOSE JUNCTION
•If drain hose extension or embedded drain piping is required, use appropriate parts that match the hose front end. See Figure 18.
•Insert drain hose into the handle of drain pan, and join drain hose and connecting hose according to Figure 18.
•Attach the Insulation (Drain hose) to the drain hose. See Figure 19.
SHIELD PIPE |
|
| EXTENSION |
INSIDE THE ROOM | DRAIN HOSE |
DRAIN HOSE |
|
FIGURE 18: Drain Hose Extension
SECTION XIII: FLARING WORK AND PIPING CONNECTIONS
FLARING WORK
Main cause for refrigerant leakage is due to defect in the flaring work. Carry out correct flaring work using the following procedure.
1.Measure the distance between the indoor and outdoor units.
2.Cut the copper pipe about 6 to 8 inches (15 to 20 cm) longer than the measured distance with a pipe cutter.
COPPER | 90° SLANTED UNEVEN ROUGH |
PIPE |
|
FIGURE 20: Pipe Cutting Approved Method
3.Use a pipe reamer or file to completely remove all burrs from the cut cross section of the pipe.
a.Put the end of the copper pipe in a downward direction to avoid having burrs drop in the piping.
PIPE
REAMER
POINT DOWN
FIGURE 21: Deburring Line Set
4.Remove flare nuts attached to indoor and outdoor units then put them on pipes that have completed burrs removal (not possible to put them on after flaring work).
5.Use a flaring tool to perform flaring work at the end of the copper pipe. Use the table below as a guideline when performing flaring work.
| HANDLE | Outside Dia. | A |
| "A" | Inch | Inch |
|
| ||
BAR | BAR | 0.24 | 0~0.02 |
| YOKE | 0.37 | 0~0.02 |
|
| ||
|
| 0.47 | 0~0.02 |
| CONE | 0.63 | 0~0.04 |
|
| ||
|
| 0.75 | 0.04~0.05 |
INSULATION (DRAIN HOSE)
COPPER PIPE 
CLAMP HANDLE 
FIGURE 22: Flaring Tools
RED ARROW MARK
DRAIN HOSE
FIGURE 19: Drain Hose Insulation
Insert the drain hose and drain cap into the drain port, making sure that it comes in contact with the back of the drain port, and then mount it. If the drain hose is not connected properly, leaking will occur.
6.Check your flaring work and if it's found to be defective, cut off the defective flare section and redo number 5.
SMOOTH ALL ROUND
INSIDE IS SHINY WITHOUT SCRATCHES
= IMPROPER FLARING =
INCLINED SURFACE CRACKED UNEVEN
DAMAGEDTHICKNESS
EVEN LENGTH
ALL ROUND
FIGURE 23: Proper and Improper Flaring
7. When flaring is complete, align the center of the pipes and suffi- ciently tighten the flare nut by hand.
12 | Johnson Controls Unitary Products |
