MEES20K028
PWF
Y
-P-N
MU-E-
BU, P-N
M
U-E2-
A
U
51
15. INSTALLATION
AIR TO WATER
Heating capacity calculation (Unit: °C/kW/
ℓ
)
A calculation example (Unit: °C/kW/
ℓ
)
* The value shown here is the rated capacity, and varies depending on the installation conditions.
+
+
A. For Air conditioning using such as Panel Heaters, Floor Heating and Fan coil units
Required total heating capacity
kW
Safety factor;
%
B. For Sanitary use such as Shower and Bathrooms
Conditions
Tank inlet water Temp.;
°C
Tank outlet water Temp.;
°C
(Set Temp -5 °C)
Safety factor for Heat Loss;
%
Operating time;
Hours
For Shower;
/Person x
Person =
(Water Temp. Condition
°C)
°C)
For Bathrooms;
/Person x
Person =
(Water Temp. Condition
The conversion of water volume to
°C
x
(
-
)
/
(
-
)
+
x
(
-
)
/
(
-
)
=
ℓ /day
Heating Capacity Calculation for sanitary usage
/ 1,000 x (
-
) =
M cal / day
The conversion of M cal to kW
/ 860 x 1,000 /
=
kW
C. Total (A+B)
Total Heating Capacity
x (100%
+
x (100%
%)
+
x (100%
%) =
kW
D. No. of units required
Safety factor;
%
%) / 11.7 kW =
units
units are required
Tank
PWFY unit
4
3
3
3
3
7
+
+
A. For Air conditioning using such as Panel Heaters, Floor Heating and Fan coil units
Required total heating capacity
20
10
10
60
15
8
20
30
1,200
240
40
45
1,200
240
40
45
10
10
60
60
10
10
888
888
44.4
20
29.42
20
3
2.82
10
20
6.45
15
29.42
8
6.45
60
10
44.4
kW
Safety factor;
%
B. For Sanitary use such as Shower and Bathrooms
Conditions
Tank inlet water Temp.;
°C
Tank outlet water Temp.;
°C
(Set Temp -5 °C)
Safety factor for Heat Loss;
%
Operating time;
Hours
For Shower;
60
/Person x
Person =
(Water Temp. Condition
°C)
°C)
For Bathrooms;
8
/Person x
Person =
(Water Temp. Condition
The conversion of water volume to
x
(
-
)
/
(
-
)
+
x
(
-
)
/
(
-
)
=
ℓ /day
Heating Capacity Calculation for sanitary usage
/1,000 x (
-
) =
M cal / day
The conversion of M cal to kW
/ 860 x 1,000 /
=
kW
C. Total (A+B)
Total Heating Capacity
x (100%
+
x (100%
%)
+
x (100%
%) =
kW
D. No. of units required
Safety factor;
%
%) / 11.7 kW =
units
units are required
°C
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