P. 08
P. 05
LIQUID PIPE AND DRAIN PIPE
* Drain pipe should be above ground
and the end off the pipe does not dip
into water all pipes must be restrained
wall by saddled.
IF THE OUTDOORS UNIT IS INSTALLED
LOWER THAN INDOOR UNIT
* Taping method ,taping from lower part
to upper
* All pipes are bound together by tape
and restrained to the wall by saddles.
IF THE OUTDOORS UNIT IS INSTALLED
HIGHER THAN INDOOR UNIT
* Taping should done from lower to upper part.
* All pipes are bound and taped together and trapped
the pipes to prevent water returning to the room.
(see picture)
* Restrain all pipes to the wall with saddles.
REFRIGERANT PIPING WORK
1. Selection of copper pipe for gas pipe and liquid pipe as informed in specific table(see pipe table)
2. For dust moisture protection , before assembly the pipe and its insulation, both end of the pipe
must be coverage.
3. Avoid pipe bending as mush as possible. If it is necessary, the bending radius must be more
than 3 or 4 cm.
Gas pipe and liquid pipe insulation depending upon copper pipe size and the insulation thickness=3/8’’
4. the connection indoor unit and outdoor unit.
•
Unscrew flare nut for releasing pressure gas in indoor unit .If there is no high-pressure
gas blowing out, it is the signal of leaking indoor unit.
•
Fit flare nut with liquid pipe. Flaring the pipe ‘s end with fare tool.
Connecting Wire
Liquid Pipe
Heat pump only
Piping tape
Drain pipe 1/2"
Gas pipe
PIPE LIMITATION AMD RECOMENATION FOR CHARGING R-22
BTU/HR
PIPNG BETWEEN INDOOR & OUTDOOR UNIT PIP SIZE OD. EXTRA CHARGING R-22
HEIGHT DIFFERENT
PIPNG
( INCH.)
FOR PIPE LENGTH
H(CON.ABOVE H(CON.UNDER
LENGTH
MORE THAN 5 M
FANCOIL)
FANCOIL) (ONE
WAY) LIQUID GAS
(GRAM/M)
10,000-12,000
15 M.
10 M.
20 M.
1/4
1/2
30
16,000-33,000
20 M.
15 M.
30 M.
3/8
5/8
60
36,000-48,000
25 M.
20 M.
35 M.
3/8
3/4
70
25 M.
20 M.
55 M.
3/8
7/8
80
56,000-60,000
25 M.
20 M.
35 M.
1/2
3/4
120
25 M.
20 M.
50 M.
1/2
7/8
120
25 M.
20 M.
60 M.
1/2 1-1/8
120