Danfoss ThermoDual-FLS Data sheet
Data sheet
ThermoDual®- FLS (welded type)
General Description / Use
Maximum operating
parameters
Primary
Maximum permissible supply temperature, primary
Maximum permissible operating pressure, primary
Rated pressure, primary
Maximum permissible pressure differential, primary
Secondary
Maximum permissible temperature, secondary
Maximum permissible operating pressure, secondary
Minimum required pressure (static), water supply
Rated pressure, secondary
Mains power supply / maximum power consumption
Domestic hot water provision by instantaneous
heater is an efficient and hygienic optimal solution.
Hot water is not stored and will be produced only
on request.
Habitats for bacteria,such as legionella are virtually
non-existent. If the conditions for connection of
these systems are given (sufficiently high capacity
on heating side to cover peak load) or buffer tanks
is present, these systems can be used unrestricted.
Significant advantages of the system are:
• no storage of drinking water
• efficient cooling of the primary media
• optimum use of energy
• independent choice of different energy sources
• at any time sufficiently high domestic hot water
temperature, that fulfils all hygienic requirements
• low space requirement
• lime scale is largely avoided
90°C / 150°C (without/with safety function)
10 / 20 bar(g)
PN10 / PN25
only 2-way valve variant: 25 bar (up to 210kW) /16 bar
90°C
10 bar(g)
1.0 bar(g)
PN10
230V AC / 4.0 A
Pumps and 3-way valve variant /
2-way valve variant
Materials
Code numbers
© Danfoss | 2019.08
Pipes, fittings, flanges, valves (domestic side)
ditto (heating side) P235GH-TC1, CuSn5Pb5Zn5-C (RG -5), ST37.0, EN-JL 1040 (GG25)
Heat exchanger 1.4404 with Cu solder
Insulation Hardcover PU hard foam λ=0.029 W/mK (100%ENEV)
Capacity
[ kW]
140 00 4X1814 00 4X1808 004X1653 0 04X1659
210 004X1815 004X1809 004X1654 004X1660
280 00 4X1816 00 4X1810 004X1655 004X1661
350 0 04X1817 00 4X1811 004X1656 00 4X1662
420 004X1818 004X1812 004X1657 00 4X1663
455 004X1819 0 04X1813 00 4X1658 004X1664
Pump +
3-way mixing valve
Pump control
(PWM control signal)
1.4571, bronze or brass as per DIN EN 1982,
also considering DIN 50930-06 and UBA guidelines
Code no.
2-way valve
(without safety function)
2-way valve
(with safety function)
VD.HE.J7.02 | 1
Data sheet ThermoDual®- FLS
Circuit diagram
Technical data
HEL Heat exchanger
P1 Heating pump
P3 Circulation pump
SFV Safety valve
M1 Motorized control valve (2/3-way)
ECD Electronic domestic hot water controller (ECL310 / P318.10)
STW Safety thermostat (optional)
BTA Hot water buffer tank (installed by customer)
1 Domestic water (cold)
2 Domestic hot water (hot network)
3 Circulation (inlet)
4 Heating supply
5 Heating return
TC Sensors (general: direct , immersion, surface)
“S2”: with designation as for controller
3-way
dpr
[kPa]
FR
DW
(10 ->60 °C)
[m3/h]
DW
dp
[kPa]
*
FR
C
(55 ->60°C )
[m3/h]
Typ e
ThermoDual®
Capacity
[kW]
p
FR
(70 ->25° C)
[m3/h]
Shut-off valve
Non-return valve
Check valve
Balancing valve
Air vent
Drain
Drain, sampling valve
(optional)
F1: Flow sensor
Pump
dpr
[kPa]
2-way
dp
[kPa]
FLS 14 0 140 2,4 52 21 38 2,4 12 1,0 / 2,4 80 / 43
FLS 210 210 3,8 95 30 81 3,6 26 1,5 / 2,4 70 / 43
FLS 280 280 5,1 86 29 76 4,8 28 2,0 / 2,4 57 / 45
FLS 350 350 6,3 74 30 59 6,0 33 2,5 / 3,4 51 / 30
FLS 420 420 7,8 53 30 54 7,2 41 3,0 / 3,4 38 / 30
FLS 455 455 8,0 59 22 54 7, 8 39 3, 3 / 3,4 34 / 31
FR: Flow rate p: primary dpr: Remaining pump head dp: Pressure loss DW: Domestic water C: Circulation
* flow rate: standard setup / maximal possible
** remaining pump head for: standard setup / maximal possible
C
dpr**
[kPa]
2 | © Danfoss | 2019.08
VD.HE.J7.02
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