-
26
-
'11 • KX-T-166
To pipe at outdoor unit
side of service valve kit
(2) Field piping work
Important
●
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 or less to isolate the vibration.
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.
●
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.
●
Be sure to use the accessory pipe for connection to the gas operation valve. For details, refer to the installation manual of the accessory pipe.
●
Tighten a flare joint securely
with two spanners
. Observe flare nut tightening torque specified in the table below.
H
Flare nut parallel side
measurement: H (mm)
ø6.35
ø9.52
ø12.7
ø15.88
Copper
pipe outer
diameter
Ｈ
17
22
26
29
Ａ
Ｂ
Flared pipe end: A (mm)
Copper pipe protrusion for flaring: B (mm)
ø6.35
ø9.52
ø12.7
ø15.88
Copper
pipe outer
diameter
0
-0.4
Ａ
9.1
13.2
16.6
19.7
ø6.35
ø9.52
ø12.7
ø15.88
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
Outdoor unit
Service valve shown in Fig. A
is used only when the pipe
washing operation is carried
out using the re-fresh kit.
Take note that the valve is not
use during normal operation.
Over 1.5m
Pipe fastening position
Front connection
Bottom connection
Right-hand side connection
Rear connection
Legend
A Attached pipe connecting outlet at refrigerant gas side
B Pipe connection outlet at liquid refrigerant side
C Refrigerant pipe outlet (Slot 64x109)
D Power cable outlet (ø30)
E Power cable outlet (ø45)
F Refrigerant pipe connection outlet (Slot 50x105)
G Pipe connection outlet at gas refrigerant side
H Signal cable outlet (ø22)
I Power cable outlet (ø34)
Hook
30
51
30
G
A
F
B
45
69
Drain outlet (ø20)
Outdoor unit
Liquid service valve
(To indoor unit)
43
E
D
H
H
I
I
C
C
45
174
161
34
155
42
45
14
54
68
A
(1) Pipe connecting position and pipe outgoing direction
B
G
640
55
3
45
159
286
54
60
120
14
D
C
A
43
4-2. Piping work
35
Outdoor gas pipe
( )
Bypass gas pipe
service valve
Flared connection
to re-fresh kit
( )
124
