-
-
'11•SAF-T-161
Ԟ
Drain pipe
Work procedure
1. Remove the flare nut and blind flanges on the pipe of the indoor unit.
̪
Make sure to loosen the flare nut with holding the nut on pipe side with a spanner and giving torque
to the nut with another spanner in order to avoid unexpected stress to the copper pipe, and then
remove them.
(Gas may come out at this time, but it is not abnormal.)
٨
Pay attention whether the flare nut pops out. (as the indoor unit is sometimes pressured.)
2. Make a flare on liquid pipe and gas pipe, and connect the refrigeration pipes on the indoor unit.
̪
Bend the pipe with as big radius as possible and do not bend the pipe repeatedly. In addition,
do not twist and crush the pipes.
̪
Do a flare connection as follows:
٨
Make sure to loosen the flare nut with holding the nut on pipe side with a spanner and giving
torque to the nut with another spanner in order to avoid unexpected stress to the copper
pipe, and then remove them.
٨
When fastening the flare nut, align the refrigeration pipe with the center of flare nut, screw
the nut for 3-4 times by hand and then tighten it by spanner with the specified torque
mentioned in the table below. Make sure to hold the pipe on the indoor unit securely by a
spanner when tightening the nut in order to avoid unexpected stress on the copper pipe.
3. Cover the flare connection part of the indoor unit with attached insulation material after a gas
leakage inspection, and tighten both ends with attached straps.
٨
Make sure to insulate both gas pipes and liquid pipes completely.
̪
Incomplete insulation may cause dew condensation or water dropping.
4. Refrigerant is charged in the outdoor unit.
As for the additional refrigerant charge for the indoor unit and piping, refer to the installation
manual attached to the outdoor unit.
Caution
٨
Install the drain pipe according to the installation manual in order to drain properly.
Imperfection in draining may cause flood indoors and wetting the household goods, etc.
٨
Do not put the drain pipe directly into the ditch where toxic gas such as sulfur, the other harmful and
inflammable gas is generated. Toxic gas would flow into the room and it would cause serious
damage to user’s health and safety (some poisoning or deficiency of oxygen). In addition, it may
cause corrosion of heat exchanger and bad smell.
٨
Connect the pipe securely to avoid water leakage from the joint.
٨
Insulate the pipe properly to avoid condensation drop.
٨
Check if the water can flow out properly from both the drain outlet on the indoor unit and the end
of the drain pipe after installation.
٨
Make sure to make descending slope of greater than 1/100 and do not make up-down bend and/or trap
in the midway. In addition, do not put air vent on the drain pipe. Check if water is drained out properly from
the pipe during commissioning. Also, keep sufficient space for inspection and maintenance.
Work procedure
1. Make sure to insert the drain hose (the end mode of soft PVC) to the end of the step part of
drain socket.
Attach the hose clamp to the drain hose around 10mm from the end, and fasten the screw
within 5mm left to the nut.
ޓ٨
Do not apply adhesives on this end.
ޓ٨
Do not use acetone-based adhesives to connect to the drain socket.
Type
SAF-DX1000E6
SAF-DX800E6
SAF-DX500E6
SAF-DX350E6
SAF-DX250E6
φ
9.52
φ
15.88
φ
6.35
φ
12.7
φ
6.35
φ
12.7
φ
6.35
φ
9.52
φ
6.35
φ
9.52
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Flare connection
Flare connection
Flare connection
Flare connection
Flare connection
Flare connection
Flare connection
Flare connection
Flare connection
Flare connection
Strap (Accessory)
Pipe cover (Accessory)
The thickness of insulation should be 20mm or more.
Ԝ
Duct Work
Ԙ
No air filter is attached to the main unit of air conditioner. Assemble an air filter in the suction
grill for convenience of cleaning.
ԙ
Select appropriate location and form for the air outlet to distribute air throughout the room.
Moreover, the air outlet should be able to adjust the air flow volume.
Ԛ
An access hole must be provided at the ceiling. It is indispensable to maintain electrical
equipment, motor and functional items, and to wash the heat exchanger.
ԛ
Duct must be heat-insulated to prevent dewing. Necessary thickness of insulator is 65 mm
(JIS A9501).
Humidifier
Air outlet
Direct expansion
coil kit
Total heat exchanger
with humidifier
Access hole
(450
□
)
Refrigerant pipe
250mm
(Section where attached
in a straight line)
Drain socket
Drain hose
Stage difflernce part
2. Prepare a joint for connecting VP-20 pipe, adhere and connect the joint to the drain hose
(the end made of rigid PVC), and adhere and connect VP-20 pipe (prepare on site).
̪
As for drain pipe, apply VP-20 made of rigid PVC which is on the market.
٨
When installing drain pipe, use VP-20 for the pipe goes up the closest to the unit, and
VP-25 or higher number product for farther pipes.
٨
Make sure that the adhesive will not get into the supplied drain hose.
It may cause the flexible part broken after the adhesive is dried up and gets rigid.
٨
The flexible drain hose is intended to absorb a small difference at installation of the unit
or drain pipes. Intentional bending, expanding may cause the flexible hose broken and
water leakage.
3. Make sure to make descending slope of greater than 1/100 and do not make up-down bend
and/or trap in the midway.
٨
Pay attention not to give stress on the pipe on the indoor unit side, and support and fix the
pipe as close place to the unit as possible when connecting the drain pipe.
٨
Do not set up air vent.
٨
When sharing a drain pipe for more than
one unit, lay the main pipe 100mm
below the drain outlet of the unit. In
addition, select VP-30 or bigger size for
main drain pipe.
Descending slope greater than 1/100
As wide as possible
(about100mm)
Insulation material
Supporting metal
Descending slope greater than 1/100
Air vent
No bump
No trap
Not touching the water
Trapped air will
generate noises.
VP-30 or bigger
1.5m~2m
Pipe cover (small)
(For insulation) (Accessory)
Pipe cover (For insulation)
(Prepare on site)
Unit
Pipe cover (big)
(For insulation) (Accessory)
VP-20
(Prepare on site)
Joint for VP-20
(Prepare on site)
VP-25
(Prepare on site)
Drain hose
(Accessory)
Drain socket
Clamp (Accessory)
(No adhesive allowed)
Caution
٨
Use the new refrigerant pipe.
ޓ
When re-using the existing pipe system for R22 or R407C, pay attention to the following items.
ޓ
Change the flare nuts with the attached ones (JIS category 2), and reprocess the flare parts.
ޓ
Do not use thin-walled pipes.
٨
Use phosphorus deoxidized copper alloy seamless pipe (C1220T specified in JIS H3300) for refrigeration pipe installation.
ޓ
In addition, make sure there is no damage both inside and outside of the pipe, and no harmful
substances such as sulfur, oxide, dust or a contaminant stuck on the pipes.
٨
Do not use any refrigerant other than R410A.
ޓ
Using other refrigerant except R410A (R22 etc.) may degrade inside refrigeration oil. And air getting into
refrigeration circuit may cause over-pressure and resultant it may result in bursting, etc.
٨
Store the copper pipes indoors and seal the both end of them until they are brazed in order to avoid any dust, dirt or
water getting into pipe. Otherwise it will cause degradation of refrigeration oil and compressor breakdown, etc.
٨
Use special tools for R410 refrigerant.
Piping work
When conducting piping work, make sure to allow the pipes
to be aligned in a straight line for at least 250 mm, as shown
in the left illustration. (This is necessary for the drain pump
to function)
Drain socket
Metal plate
10mm
Hose clamp
Fasten the screw within 5 mm left to the nut.
Drain hose
OA
EA
RA
SA
Ceiling
surface
ԝ
Refrigerant pipe
Suction inlet
(with air filter)
4. Insulate the drain pipe.
٨
Be sure to insulate the drain socket and rigid PVC pipe installed indoors otherwise it may
cause dew condensation and water leakage.
̪
After drainage test implementation, cover the drain socket part with pipe cover (small size), then
use the pipe cover (big size) to cover the pipe cover (small size), clamps and part of the drain
hose, and fix and wrap it with tapes to wrap and make joint part gapless.
