Danfoss Akva Lux II VX HWP Fact sheet

Fact sheet

Akva Lux II VX HWP

District heating substation for indirect heating and instantaneous domestic hot water.

Application

The Akva Lux II VX HWP is a substation featuring
high performance and simple operation. The
Akva Lux II VX is especially suitable for two-pipe
systems and systems with floor heating. The sub­station is available in several capacity variants.

Construction

The Akva Lux II VX substation is available in
two main types with a plate heat exchanger
for domestic hot water production type XB
06H-1 26 for 1-2 dwellings and heat exchan­ger type XB 06H-1 40 for 3-4 dwellings. On
the heating side the substation is available
with heat exchanger type XB 06H-26, 40 and
type XB 06L-1 24 for floor heating. The Akva
Lux II VX also features safety and non-return
valve on the cold water connection, ball val­ves, sensor pockets, differential pessure con­troller, expansion vessel, circulation pump,
thermostat, strainers, an energy-saving do­mestic hot water controller Danfoss PTC2+P,
as well as a Danfoss thermostat for control of
the bypass/circulation temperature and a fle­xible fitting piece for mounting of heat meter
in the district heating return and supply line.
The substation is prepared for domestic hot
water recirculation.
controlled by an
with weather compensation.

The heating temperature is

electronic ECL 210 controller

Design

The Akva Lux II VX is designed for
wall-mounting and during the construc­tion there has been much emphasis on a
user-friendly placement of all components.
The Akva Lux II VX is supplied with a whi­te-lacquered cover in modern design.

Heat exchanger for DHW heating

The substation is based on a brazed, highly
efficient plate heat exchanger, which is con­trolled by a thermostatic and pressure con­trolled DHW controller, Danfoss PTC2+P with
integrated differential pressure controller and
energy-saving function, which ensures that
the heat exchanger is cold during standby.

Bypass (thermostatic circulation)

The water heater is supplied with a ther­mostatically controlled bypass, which ensu­res that hot water is produced immediately,
when tapping starts. The bypass temperature
is set with due consideration of the best pos­sible DHW comfort and economy. The sub­station is easily rebuilt for application in sy­stems with DHW recirculation.

Domestic hot water recirculation

The substation is prepared for connection to
systems with DHW recirculation.

FEATURES AND BENEFITS

• Substation for large single-family houses

• Indirect heating, DHW heating based on
flow principle

• Electronic control of heating (HE)
temperature

• Innovative, energy-saving controller PTC2
+ P in combination with high performance
heat exchanger for on-demand water
heating without no-load losses function

• Pipes connection in top or bottom of
substation = Savings in installations costs

• Pipes and heat exchanger made of stainless
steel, connections with EPDM gaskets.

• Minimized risk of lime scale and bacteria
formation

• Electrical wiring from factory - Plug & Play

• Capacity: up to 53 kW DHW ,
Radiator 10-34 kW, Floor heating 8 kW

Switching to DHW recirculation is possible
from a constructional point of view, requi­ring only mounting of a separate circulation
set (see options). The circulation temperatu­re is set independently of the set DHW tem­perature. This ensures the best possible DHW
comfort, very low standby losses and thus a
very good district heating economy.

Mounting of heat meter

The substation is equipped with 3/4” flexible
fitting pieces for fitting of a heat meter in the
DH supply or/and DH return flow.

Service and maintenance

The substation is very service-friendly and
easy to install. It is mounted on the wall and
as all pipes are placed in pipe bracket distan­ce, it is possible to establish a nice piping
either in the top or in the bottom of the sub­station.

www.danfoss.com

39 780 42

31

470 40 40

610

62,5 100 130 65 65 65 62,5

44

550

381

Danfoss Standard

A3

1:6

Material

SizeScale

Projection

Approval

Design

Replace

Designation

E

D

C

B

A

87

6

5

4

3

2

1

kg

Weight

General tolerance accuracy

CIRCUIT DIAGRAM  AKVA LUX II VX HWP WITH ELECTRONIC CONTROLLER ECL 210/ A237

DHW

DCW

DH
Supply

DH
Reurn

Design specifications:

Nominal pressure (prim/sec.): PN 16 / PN 3
Max. supply temperature: 120 °C (design temp.)
Min. ΔP: See capacity examples
Brazing material (HEX): Copper

Weight incl. cover: Max. 52 kg
(incl. packing)

Cover: White-lacquered steel

Dimensions (mm):

Without cover: H 861 × W min. 510 - max. 553* × D 365
With cover: H 861 × W 550 × D 381
With cover: H 861 × W 600** × D 381

* Units with insulated plate heat exchanger type XB06H-1 40 for both HE and
DHW circuits.

** Width of cover for units with insulated plate heat exchanger type XB06H-1 40
for both HE and DHW circuits.

Eletrical supply: 230 V AC

Connections sizes:

DH: G ¾“ ET (ext. thread)
DCW, DHW, HE: G ¾“ ET (int. thread)

Circulation: R ½“ ET (ext. thread)

1 Plate heat exchanger HE
2 Plate heat exchanger DHW
5 Strainer
6 Non-return valve
7 Ball valve
8 Circulation pump HE
11 Safety valve HE
12 Safety valve DHW
13 Thermometer
14 Pocket for pressure gauge
15 Manometer
16 Expansion vessel

HE
Supply

HE
Return

Recirculation:

Remember to order circulation set for systems
that feature DHW recirculation.

Connections:

1. District heating (DH) supply

2. District heating (DH) return

3. Heating (HE) return

4. Heating (HE) supply

5. Domestic hot water (DHW)

6. Domestic cold water (DCW)

Options:

• Cover, white-lacquered steel, with door

• Electronic controller Danfoss ECL310

• Circulation set for DHW recirculation

Wall

• Safety function - safety thermostat + actuator

• Connection of pipes can be established in the top
or in the bottom of the substation

• Pipe insulation

• Mounting of heat meter (supplied by customer)

• Supplementar y fitting set for change of fitting
piece size ¾ x 110 mm to fitting piece size 1“ x 190
mm

23 Sensor pocket for heat meter
24 Fitting piece for heat meter

3/4” x 110 mm

25 Controller Danfoss ECL210/

A237
26 Outdoor sensor, ESMT
27 Sensor Danfoss, ESMC
29 Actuator HE, AMV 150
30 Multifunctional control valve

AHQM
38 PT°C 2 controller
40 Thermostat for bypass/
circulation

-----------------------------------------­Options:
57 Safety thermostat monitor

Note: The distance between the DH supply
and the DH return pipe (100 mm) provides
sufficient space for insulation of the supply
pipes.

DHW: CAPACITY E XAMPLES, 10°C/45°C

CAPACITY, WEIGHT AND DIMENSIONS

DHW

capacity

[kW]

32.3 XB 06H-1 26 55 21.8 13.16 0.36 840

Plate heat

exchanger

Supply flow

primary

[°C]

32.3 XB 06H-1 26 60 18.9 13.16 0.24 680

32.3 XB 06H-1 40 55 19.0 13.16 0.27 770

32.3 XB 06H-1 40 60 18.9 13.16 0.24 680

41.0 XB 06H-1 26 60 20.4 16.83 0.41 890

41.0 XB 06H-1 26 70 16.8 16.83 0.23 660

53.0 XB 06H-1 40 60 19.1 21.67 0.55 1110

Return flow

primary

[°C]

DHW

tap load

[l/min]

Pressure

loss

Primary

[bar]

Flow rate

primary

[l/h]

HEATING: CAPACITY EXAMPLES

Heating

capacity

Plate heat

exchanger

19 XB06H-1 26 70/40 35/60
31 XB06H-1 40 70/40 35/60

8 XB06L-1 24270/31 30/35

7 XB06H-1 40270/31 30/35
10 XB06H-1 40 60/30 25/55
34 XB06H-1 26 90/44 40/70

53.0 XB 06H-1 40 70 15.7 21.67 0.31 840

Danfoss Redan A/S · District Energy · Omega 7 · DK-8382 Hinnerup
Tel.: [phone] · Fax: [phone] · [e-mail] · www.redan.danfoss.dk

© Danfoss | DHS-SRMT/ PL | 2016 . 05

HE circuit

primary

[° C]

HE circuit

secondary

[° C]

2

2

TOTAL

Pressure loss

primary

(total3) bar

5

0.40

5

0.87

5

0.17

5

0.17

4

0.29

6

0.49

Flow rate

primary

(total3) [l/h]

5

920

5

1160

5

660

5

650

4

880

6

840

VL.GP.P3.02