Refrigerant Piping Work - Daikin FXDQ-SPV1 Engineering Data

FXDQ-SPV1
CAUTION
·
Please use a water level or water filled polyethylene
pipe to confirm whether the air conditioner is installed
horizontally. When a polyethylene pipe is used to replace
a water level, please align the upper surface of the product
with the horizontal level of both sides of the polyethylene
pipe, so as to adjust the level of the product. (Please
pay special attention to note that the tilting direction
shall not be reversed against the water drainage
direction, as this will result in water leakage.)
Water level
(4) Tighten the nut on the upper side.

6. REFRIGERANT PIPING WORK

(For the installation of the refrigerant pipe for the
outdoor unit, please refer to the installation manual for
the outdoor unit.)
(Heat insulation shall be carried out for the pipes on
the air supply side and the liquid side. Otherwise water
may leak out. Please use insulation material which can
withstand a high temperature of over 120
Please base on the installation environment to reinforce
the heat insulation for the refrigerant pipe.
Otherwise, condensate may occur on the surface of the
heat insulation material.)
(Before installing the refrigerant pipe, please always
confirm that the refrigerant is R410A. In case that any
other refrigerant is used, the air conditioner cannot work
normally.)
CAUTION
The product is a special machine using new type
refrigerant (R410A). Please always comply with the
following items to carry out the installation work.
·
Use special pipe cutting machine and flare tools for R410A.
·
When connecting the flare, please apply freezing oil
(ester oil or ether oil) only on the inside of the flare.
·
Always use the flare nut supplied with the air conditioner.
(Never use flare nut of any other type, such as Type 1
flare nut, otherwise the refrigerant may leak out.)
·
To prevent dirt, dust or moisture from entering into the
inside of the pipe, please correct the pipe in the
squeezed or sealed manner.
CAUTION
·
Please ensure to use refrigerant of the specified type in
the refrigeration cycle, and never let the air contaminate
the refrigerant.
·
In case that during installation any refrigerant is leaked
out, the house should be ventilated for air exchange.
Polyethylene pipe
o C.
30
(1) Connect the pipe.
·
Refrigerant has been filled in the outdoor unit.
·
Align the connecting section of the refrigerant pipe to
the center of the flare section, and firstly turn 3 – 4
operations manually, and then tighten the pipe with the
specified torque.
·
To prevent the flare section from being broken or
leaking air, please tighten with a torque wrench.
(Please refer to Fig. 6)
·
To prevent air leakage, please apply freezing oil
(ester oil or ether oil) on the inside of the flare.
(Please refer to Fig. 7)
·
Please fix the flare nut to the main unit. (To prevent the
flare nut from aging and cracking)
·
For the dimensions of the flare and the tightening torque,
please refer to Table 1.
[Tightening]
Never apply the freezing
Torque wrench
oil on the outer surface
Nut
Wrench
Pipe
Never let the nut in
connector
contact with the freezing oil,
and avoid over-tightening
Flare nut
Fig. 6
Pipe connector Flare
Flare nut
Note : Please always align the center of the connection
section of the refrigerant pipe with the center of the flare
section and the flare nut.
Otherwise pipe breaking or air leakage can occur.
Table 1
Pipe Flare dimension
Tightening torque
diameter
Ø 6.4 14.2 - 17.2N m
•
(1/4") (144 - 176 kgf cm)
•
Ø 9.5 32.7 - 39.9N m
•
(3/8") (333 - 407 kgf cm)
•
Ø 12.7 49.5 - 60.3N m
•
(1/2") (504 - 616 kgf cm)
•
Ø 15.9 61.8 - 75.4N m
•
(5/8") (630 - 770 kgf cm)
•
CAUTION
Over-tightening can damage the flare and result in
refrigerant leakage. Please note not to let oil stick
to any part outside the flare. In case that any oil
sticks to parts as resin, damage can occur.
·
In case that a torque wrench is not available, please
refer to Table 2.
When an ordinary wrench is used to tighten the flare nut,
the nut will suddenly become tightened in some point.
From such point, further tighten the nut to the angle as
shown in Table 2.
It is not recommended to use this method, and it can
be used only in emergency cases.
You must use a torque wrench, but if you do not have a
torque wrench and have to install the unit, you can follow
the following method to install.
When you complete the work, always check whether
any air is leaked out.
When you use a wrench to tighten the flare nut, the
tightening torque can suddenly increase in some point.
From such point, further tighten the flare nut to the angle
as shown below :
EDTFVN391825
[Applying oil]
Apply the
freezing oil
on the inner
surface of
the flare
Fig. 7
Flare
A (mm)
8.7 - 9.1
12.8 - 13.2
R0.4-0.8
16.2 - 16.6
19.3 - 19.7
3P347455-11H
5