Daikin RXYQ96PATJ [70/108] Checking of device and instal lation conditions
Макгруп McGrp.ru
Задайте вопрос
Зарегистрироваться

Daikin RXYQ96PATJ [70/108] Checking of device and instal lation conditions

Daikin RXYQ96PATJ [70/108] Checking of device and instal lation conditions
EDUS391000-N_a Installation
Installation of Outdoor Units 69
NOTE
• The air-tightness test and vacuum drying
should be done using the service ports of
equalizer pipe, HP/LP gas pipe, suction gas
pipe and liquid pipe shutoff valve.
See the [R410A] Label attached to the front
plate of the outside unit for details on the
location of the service port (see figure at
right)
• See [Shutoff valve operation procedure]
in “11-1 Before working” for details on
handling the shutoff valve.
• The refrigerant charge port is connected to unit pipe.
When shipped, the unit contains the refrigerant, so use caution
when attaching the charge hose.
<Air tight test>
Pressurize the liquid pipe, suction gas pipe, HP/LP gas pipe and
equalizer pipe from the service ports of each shutoff valve to 550
psi (do not pressurize more than 550 psi). If the pressure does not
drop within 24 hours, the system passes the test.
If there is a pressure drop, check for leaks, make repairs and per-
form the airtight test again.
NOTE
<Vacuum drying> Do not energize the indoor unit before
performing the vacuum drying.
A triple evacuation is recommended; note that this is basic
refrigeration best practice and not specific to Daikin. The refrigerant
gauges should be connected to the liquid, HP/LP and suction gas
pipes and a triple evacuation performed. Break the first and second
vacuum with dry nitrogen. The final evacuation should be to below
500 microns and a rise test conducted; the system should hold below
500 microns for at least one hour.
9. PIPE INSULATION
• Insulation of pipes should be done after performing “8. AIR TIGHT
TEST AND VACUUM DRYING”.
• Always insulate the liquid piping, the HP/LP gas piping, the gas
piping, and these pipe connections.
Failing to insulate the pipes may cause leaking or burns.
Especially, be sure to insulate the HP/LP gas piping as withstand-
ing as the suction pipe because the suction gas follows in the HP/
LP gas piping when the system is whole cooling mode.
• Reinforce the insulation on the refrigerant piping according to the
installation environment. Condensation might form on the surface
of the insulation. Refer to the below.
Ambient temperature : 86°F, humidity : 75% to 80% RH : min.
thickness : 9/16 in..
If the ambient temperature exceeds 86°F and the humidity 80%
RH, then the min. thickness is 3/4 in..
See the Engineering data book for detail.
• If there is a possibility that condensation on the shutoff valve might
drip down into the indoor unit through gaps in the insulation and
piping because the outside unit is located higher than the indoor
unit, etc., this must be prevented by caulking the connections, etc.
(Refer to figure 25)
• The piping lead-out hole lid should be attached after opening a
knock hole. (Refer to figure 26)
• If small animals and the like might enter the unit through the piping
lead-out hole, close the hole with blocking material (procured on
site) after completion of “11. ADDITIONAL REFRIGERANT
CHARGE AND CHECK OPERATION”. (Refer to figure 29)
(Refer to figure 25)
1. Insulation material
2. Caulking, etc.
(Refer to figure 26)
1. Piping lead-out hole lid
2. Open a knock hole at “ ”.
3. Block “ ”.
NOTE
• After knocking out the holes, we recommend you remove burrs in
the knock holes (See figure 26) and paint the edges and areas
around the edges using the repair paint.
10. CHECKING OF DEVICE AND INSTAL-
LATION CONDITIONS
Be sure to check the followings.
For those doing electrical work
1. Make sure there is no faulty transmission wiring or loosing of a nut.
See “7-4 Transmission Wiring Connection Procedure”.
2.
Make sure there is no faulty power wiring or loosing of a nut.
See “7-5 Power Wiring Connection Procedure”.
3. Has the insulation of the main power circuit deteriorated?
Measure the insulation and check the insulation is above regular
value in accordance with relevant local and national regulations.
For those doing pipe work
1. Make sure piping size is correct.
See “
6-1 Selection of piping material and Refrigerant branching
kit
”
.
2. Make sure insulation work is done.
See “9. PIPE INSULATION”.
3. Make sure there is no faulty refrigerant piping.
See “6. REFRIGERANT PIPING”.
11. ADDITIONAL REFRIGERANT CHARGE
AND CHECK OPERATION
The outside unit is charged with refrigerant when shipped from the
factory, but depending on the size and length of the piping when
installed, it may require additional charging.
For charging the additional refrigerant, follow the procedure in this
chapter.
And then carry out the check operation.
11-1 Before working
[About the refrigerant tank]
Check whether the tank has a siphon pipe before charging and place
the tank so that the refrigerant is charged in liquid form.
(See the figure below.)
NOTE
• Always use the proper refrigerant (R410A). If charged with the
refrigerant containing an improper material, it may cause an explo-
sion or accident.
•
R410A is a mixed refrigerant, so charging it as a gas will cause the
refrigerant composition to change, which may prevent normal opera-
tion.
[Shutoff valve operation procedure]
When operating the shutoff valve, follow the procedure instructed
below.
[R410A] Label
With siphon pipe
Other tanks
Stand the tank upright and charge.
(The siphon pipe goes all the way inside,
so the tank does not need be put
upside-down charge in liquid form.)
Stand the tank upside-down and charge.

Содержание

Похожие устройства

Скачать