8
Design & Selection
6 Selection of the Water Tank
6.1 Specifications of the Water Tank
SXVD200LCJ/A-K
220~240V-1Ph-50Hz
A single coil with the electric heater is integrated, used for floor heating system
SXVD300LCJ/A-K
SXVD200LCJ2/A-K
220~240V-1Ph-50Hz
Dual coils with the electric heater are integrated, used for floor heating system and the solar system
SXVD300LCJ2/A-K
SXVD200LCJ/A-M
380~415V-3Ph-50Hz
A single coil with the electric heater is integrated, used for floor heating system
SXVD300LCJ/A-M
SXVD200LCJ2/A-M
380~415V-3Ph-50Hz
Dual coils with the electric heater are integrated, used for floor heating system and the solar system
6�2 Volume Selection of the Water Tank
6.2.1 Selection Based on Water Consumption Per Capita
Building Type
Unit
Daily Water Consumption (L)
Water Temperature (°C)
House
Per person, Per day
40~80
60
Villa
Per person, Per day
70~110
60
6�2�2 Selection Based on Sanitary Utensils
Utensil Type
Daily Water
Consumption (L)
Water Temperature (°C)
Bathtub, Sprinkler system (with shower)
150
40
Bathtub, Sprinkler system (without shower)
125
40
Shower
70~100
37~40
Wash Basin
3
30
6� 2�3 Selection of the Water Tank
Selection of the water tank should consider the flow rate of the shower head, duration of use per person
and daily water consumption.
Volume of the Water Tank=
t(design temperatuere)-t(entering cold water temperatuere)
t(water tank temperatuere set point)-t(entering cold wa ter temperature)
•consumptio
n
t (design temperature): generally it is 60°C ;
t (entering cold water temperature): it differs for different regions.
t ( water tank temperature set point): it is the target heating temperature of the water tank
α: correction factor
Empirical Values for Volume Correction of the Water Tank
Duration of Use
(min/Person)
Flow Rate of the Shower Head
(L/min)
10
15
20
25
30
40
4
0.48
0.71
0.94
1.18
1.42
1.89
6
0.71
1.06
1.42
1.77
2.12
2.83
8
0.95
1.42
1.89
2.36
2.83
3.77
10
1.18
1.77
2.36
2.95
3.54
4.72
15
1.76
2.65
3.54
4.42
5.31
7.08
Empirical values are worked out under conditions of 80L consumption (per day per person), 8L/min flow rate
of the shower head, and 10 minutes use duration per person.
7 Examples for Model Selection
7�1 General Introduction to the Example Project
For a two-floor house, there is a master room and a both room for each floor and both of
them require floor heating. Other rooms use the heat pump for heating in winter. The master
room covers 28m
2
and the both room covers 12m
2
.
Summary of Contents for Versati II Series
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