10. Installation
5
Manage water quality in accordance with the following
water quality standards for refrigeration equipment:
CAUTION
• If water quality is not managed in accordance with
the water quality standards, corrosion and scales may
develop, which may shorten the life of the product and
cause performance degradation and lead to a serious
product malfunction.
Item
Cold water Corrosion Scales
Reference
value
PH(25℃)
6.5-8.0
O
-
Conductivity
(25 ℃, μS/cm)
200 or less
O
-
Alkalinity (PPM)
50 or less
-
O
Hardness (PPM)
50 or less
-
O
Chlorine ion (PPM) 50 or less
O
-
Sulfate ion (PPM) 50 or less
O
-
Iron (PPM)
0.3 or less
O
-
Sulfur ion (PPM)
Not
detected
O
-
Ammonium ion
(PPM)
0.2 or less
O
-
Silica (PPM)
30 or less
-
O
6
Check the rated flow rate of cold / hot water and the
pressure loss inside the heat exchanger.
CAUTION
• If the rated flow rate is not supplied, it may cause
performance degradation and product malfunction.
Category
Mode
Rated flow
(LPM)
Pressure drop
(kPa)
Slim 1 way
cassette
AG026TN1DKH*
7.5
23.0
AG032TN1DKH*
9.6
34.5
AG042TN1DKH*
11.9
45.0
0.0
20.0
40.0
60.0
80.0
100.0
120.0
2.5 5 7.5 10 12.5 15 17.5 20 22.5
Pressure loss (kPA)
1
2
1
Slim 1 way cassette
AG026/032TN1DKH*
2
Slim 1 way cassette
AG042TN1DKH*
Connecting the drain hose
• Drain hoses and PVC pipes are sold separately.
• Before installing the drain pipe, be sure to check if
drainage is good.
1
Connect the flexible hose to the drain port of the fan
coil unit.
• Make sure that a rubber ring is assembled at the
connection port.
• Securely fasten the flexible hose until you hear
"click."
• The position of the connection port may differ
depending on the fan coil unit model.
2
Fix the drain pipe to the opposite end of the flexible
hose.
•
•
Fix the connection port of the flexible hose and the
drain pipe (PVC) with adhesive for PVC.
After the adhesive for PVC is completely hardened,
check whether water leaks from the connection
part.
• Water pipe specifications
– Slim 1 way cassette (Small): VP20 (OD: ø 26,
ID: ø 20)
– Slim 1 way cassette (Large)/ 4 way cassette /
360 cassette: VP25 (OD: ø 32, ID: ø 25)
Drain hose
PVC Tube Joint +
VP25 (OD: 32 mm, ID: 25 mm)
Drain pipe
3
Shorten the connection length of the drain pipe as
much as possible.
• Install the drain pipe so that it is sloped downward
(3 mm or more) for proper drainage of condensation
water.
• Use a cable tie to secure the connection part so
that the flexible hose and tje drain pipe are not
separated.
• Be sure to insulate the piping, contact area, and
drain pipe.
CAUTION
• After installing the fan coil unit, be sure to insulate the
pipe, piping connections, and drain pipe.