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127
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‘19 • KX-SM-318
(1) On-site piping work
Important
●
Please take care so that installed pipes may not touch components within a unit.
●
During the pipe installation at site, keep the service valves shut all the time
.
●
Give
sufficient protections
(compressed and brazed or by an adhesive tape)
to pipe ends so that any water or foreign matters may not enter the pipes
.
●
In bending a pipe, bend it
to the largest possible radius (at least four times the pipe diameter)
. Do not bend a pipe repeatedly to correct its form.
●
An outdoor unit’s pipe and refrigerant piping are to be flare connected. Flare a pipe after engaging a flare nut onto it. A flare size for R410A is different from that for
conventional R407C. Although we recommend the use of flaring tools developed specifically for R410A, conventional flaring tools can also be used by adjusting the
measurement of protrusion B with a protrusion control gauge.
●
Tighten a flare joint securely
with two spanners
. Observe flare nut tightening torque specified in the table below.
●
First remove the five screws ( mark) of the service panel and push it down into the direction of the arrow mark and then remove it by pulling it toward you.
●
The pipe can be laid in any of the following directions: side right, front, rear and downward.
●
Remove a knock-out plate provided on the pipe penetration to open a minimum necessary area and attach an edging material supplied as an accessory by cutting it to an
appropriate length before laying a pipe.
●
In laying pipes on the installation site, cut off the casing’s half blank that covers a hole for pipe penetration with nippers.
●
If there is a risk of small animals entering from the pipe penetration part, close the part with some sealing material or the like (to be arranged on the installer’s part).
●
I
n the case of an installation using a collective drain system, use a port other than the bottom one to take out cables and pipes. If the bottom port is used, seal it thoroughly
so that drain water may not spill out.
●
Use an elbow (to be arranged on the user’s part) to connect control valves to the piping.
●
In anchoring piping on the installation site, give 1.5m or a longer distance between an outdoor unit and an anchoring point where the piping is secured as illustrated below.
(A failure to observe this instruction may result in a pipe fracture depending on a method of isolating vibrations employed.)
●
The pipe should be anchored every 1.5m
o
r less to isolate the vibration.
H
Floor surface
Floor surface
Floor surface
Liquid side
Horizontal
Horizontal
Horizontal
Floor surface
Floor surface
Gas side
Floor surface
Minimum pipe wall
thickness (mm)
Liquid side
Pipe diameter
(mm)
Minimum pipe wall
thickness (mm)
Flare
Gas side
Pipe diameter
(mm)
Model
Outdoor unit
Indoor unit
Connection
method
Flare
Connection
method
Unit piping specifications
The piping material should be phosphorus deoxidized copper seamless steel pipes. (C1220T, JIS H 3300)
Attention
4-2. Piping work
Flare nut parallel side
measurement: H (mm)
φ
6.35
φ
9.52
φ
12.7
φ
15.88
Copper
pipe outer
diameter
Ｈ
17
22
26
29
Ａ
Ｂ
Flared pipe end: A (mm)
Copper pipe protrusion for flaring: B (mm)
φ
6.35
φ
9.52
φ
12.7
φ
15.88
Copper
pipe outer
diameter
0
-0.4
Ａ
9.1
13.2
16.6
19.7
φ
6.35
φ
9.52
φ
12.7
φ
15.88
Copper
pipe outer
diameter
In the case of a rigid (clutch) type
With an R410A tool With a conventional tool
0
－
0.5
0.7
－
1.3
Over 1.5m
Item
●
Always select pipes meeting the
minimum wall thickness requirement.
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
φ
9.52
φ
6.35
φ
6.35
φ
6.35
φ
6.35
φ
6.35
φ
6.35
φ
9.52
φ
9.52
φ
9.52
φ
9.52
φ
9.52
1.0
0.8
0.8
0.8
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
φ
15.88
φ
9.52
φ
9.52
φ
9.52
φ
12.7
φ
12.7
φ
12.7
φ
15.88
φ
15.88
φ
15.88
φ
15.88
φ
15.88
121, 140, 155
15
22
28
36
45
56
71
90
112
140
160
For front connection
For downward connection
For side right connection
For rear connection
In
side
Out
side
Catch
Piping connection position and the piping remove direction
CAUTION
If you tighten it without using double spanners, you may deform
the service valve, which can cause an inflow of nitrogen gas into
the outdoor unit.
Outdoor unit
Pipe fastening position
Use the inside
half blank
for rear
connection
Summary of Contents for FDC121KXZEN1
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