Danfoss EvoFlat FSS Fact sheet

Fact sheet

EvoFlatTM FSS fully insulated

Flat station with integrated water heater for apartments, single- and multi-family houses

FEATURES AND BENEFITS

• Flat station for direct heating and DHW
heating based on flow principle

• Innovative, energy-saving controller
TCP-M in combination with high
performance heat exchanger for on­demand water heating

• Capacity: 15 kW HE, 55 kW DHW

• Minimum space required for installation

• Built-in or wall-mounted variant

• Pipes and plate heat exchanger made of
stainless steel

• No retightening of internal connections
required, due to newly designed click
connection,

• Constant DHW temperature even at
fluctuating flow temperatures or
differential pressures

• Minimized risk of lime scale and bacteria
formation

Application

Die EvoFlatTM FSS is a compact and simple
to operate flat station. Especially suitable
for two-pipe systems in residential build­ings, which are supplied from a secon­dary connected district heating system, a
block heating system, a centrally located
boiler system (oil, gas or biomass, as well
as for CHP systems. The EvoFlat FSS

TM

is
available as built-in variant with a recess
box or as mount-on-wall variant with
cover.

Primary side (DH)

The flat station is prefabricated with in­terconnecting components such as a dif­ferential pressure controller (integrated
in main temperature controller TPC-M),
strainer, sensor pockets and fitting piece
for insertion of a heat meter.

Heating (HE)

The self-acting temperature controller
TPC - M with integrated differential pres­sure controller sets the optimum operat­ing conditions for heating and DHW. In
order to enable a time dependent tem­perature control program, a zone valve
with actuator is included and can be
connected to a room thermostat as an
option.

Domestic hot water (DHW)

The domestic hot water is prepared in
the heat exchanger based on the flow
principle and the temperature is regu­lated by the self-acting controller with
integrated differential pressure con­troller - the TPC-M.
Supreme ease of operation is ob­tained via the combined hydraulic and
thermostatic regulation of the TPC-M
controller. The flow-controlled part
allows primary and secondary side
flow through the heat exchanger, only
when hot water is tapped and blocks
the flow immediately after completion
of the tapping process.
The thermostatic part controls the do­mestic hot water temperature.
The TPC - M controller with integrated
differential pressure controller also
compensates for flunctuating flow
temperatures and differential pres­sures and thereby ensures a constant
domestic hot water temperature at all
times.
For registration of the cold water con­sumption the EvoFlat

TM

FSS flat station
is equipped with a fitting piece for
mounting of a cold water meter in the
DCW inlet.

Construction

All pipes are made of stainless steel.
The connections are made by a newly
designed click connection.
Compared to conventional stations
with screw connections, this new
connection technology does not re­quire retightening during assembly.

Insulation

The EvoFlatTM FSS flat station is built
up on an EPP insulated back plate
as well as a front insulation cabinet,
enabling the customer to have a fully
insulated substation, thus ensuring
reduced heat losses and excellent
operating economy.

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CIRCUIT DIAGRAM - EXAMPLE

DHW

DCW

Outlet

DCW

Inlet

DH

Supply

DH

Return

38

59

24

27

Design specifications:

Nominal pressure: PN 10
Max. supply temperature: 95 °C
DCW static pressure: P
Brazing material (HEX): Copper / Stainless steel

= 1,5 bar

min

Weight excl. cover: 10 kg

Insulation: EPP λ 0,039

2

575

23 5

2 Plate heat exchanger Danfoss XB06H -1
5 Strainer 3/4” N/ N mv=0,6 mm
23 Sensor pocket

M10×1

24 Fitting piece for energy meter 3/4” x 110 mm
27 Temperature sensor DHW
38 Hot Water Controller TPC-M
40 Summer-Bypass
59 Fitting piece for DCW meter: 3/4” × 110 mm

40

HE
Supply

HE
Return

Connections:

1. Domestic cold water (DCW) inlet

2. Domestic hot water (DHW)

3. Domestic cold water (DCW) outlet

4. District heating (DH) supply

5. District heating (DH) return

6. Heating (HE) supply

7. Heating (HE) return

Electrical supply: 230 V AC

Dimensions (mm):

With connections: H 575 × W 545 × D 150*
* Depth incl. mounting plate

Connections sizes:

G ¾“ IT (int. thread)

DHW: CAPACITY EXAMPLES 10/50°C

Temperature

primary

Supply/Return

[°C]

Pressure loss

37 65/21 23 730 13.3
43 65/22 40 850 15.3
45 65/20 22 867 16.1
49 65/21 30 950 17.5
55 65/16 27 950 19.4
38 55/21 27 950 13.6
51 65/19 28 950 18.3
34 55/24 28 950 12.5

Unit typ e

HEX

XB06H-1 26 Cu/E (Type 1)

XB06H-1 40 Cu/E (Type 2)

XB06H+ 60 Cu (Type 3)

XB06H-1 56 E (Type 3)

* Energy meter not incl.

DHW

capacity

[[kW]

Primary

[*kp a]

112 65 65 65 65 65 65

545

Flow rate
Primary*

[l/h]

Tap load

[l/min.]

* * Energy meter and DHW heating not incl.

Optionen:

• Room thermostat

• Actuator for zone valve

• Mounting rail for wall mounted variant

• Recess box for built-in variant incl.
mounting rail

HEATING: CAPACITY EXAMPLES

Heating
capacity

[kW]

10 20 3 430
10 30 1 287
10 40 1 215
15 20 8 645
15 30 3 430
15 40 2 323

Heating

circuit Δt

[°C]

Total pressure loss

primary* *

[kPa]

Flow rate

primary

[l/h]

© Danfoss | DHS-SMDT/PL | 2021 .02

AM180986466241en-020302