Danfoss ThermoDual-FLS Data sheet

Data sheet

ThermoDual®- FLS (welded type)

General Description / Use		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

Maximum operating

Primary

parameters

Maximum permissible supply temperature, primary

90°C / 150°C (without/with safety function)

Maximum permissible operating pressure, primary

10 / 20 bar(g)

Pumps and 3-way valve variant /

Rated pressure, primary

PN10 / PN25

2-way valve variant

Maximum permissible pressure differential, primary

only 2-way valve variant: 25 bar (up to 210kW) /16 bar

Secondary

Maximum permissible temperature, secondary

90°C

Maximum permissible operating pressure, secondary

10 bar(g)

Minimum required pressure (static), water supply

1.0 bar(g)

Rated pressure, secondary

PN10

Mains power supply / maximum power consumption

230V AC / 4.0 A

Materials

Pipes, fittings, flanges, valves (domestic side)

1.4571, bronze or brass as per DIN EN 1982,

also considering DIN 50930-06 and UBA guidelines

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)

Code numbers

Capacity

Code no.

Pump +

Pump control

2-way valve

2-way valve

[ kW]

3-way mixing valve

(PWM control signal)

(without safety function)

(with safety function)

140

004X1814

004X1808

004X1653

004X1659

210

004X1815

004X1809

004X1654

004X1660

280

004X1816

004X1810

004X1655

004X1661

350

004X1817

004X1811

004X1656

004X1662

420

004X1818

004X1812

004X1657

004X1663

455

004X1819

004X1813

004X1658

004X1664

© Danfoss | 2019.08

VD.HE.J7.02 | 1

Data sheet	ThermoDual®- FLS
Circuit diagram

Shut-off valve Non-return valve Check valve

Balancing valve

Air vent

Drain

Drain, sampling valve (optional)

F1: Flow sensor

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)

1Domestic water (cold)

2Domestic hot water (hot network)

3Circulation (inlet)

4Heating supply

5Heating return

TC Sensors (general: direct , immersion, surface) “S2”: with designation as for controller

Technical data
	Type	Capacity	FRp	Pump	2-way	3-way	FRDW	DW	FRC*	C
			(70->25°C)	dpr	dp	dpr	(10->60°C)	dp	(55->60°C)	dpr**
	ThermoDual®	[kW]
			[m3/h]	[kPa]	[kPa]	[kPa]	[m3/h]	[kPa]	[m3/h]	[kPa]
	FLS 140	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

2 | © Danfoss | 2019.08

VD.HE.J7.02