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. The heating temperature is controlled by an electronic ECL 210 controller with weather compensation.

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 whi- te-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

••Substationforlargesingle-familyhouses

••Indirectheating,DHWheatingbasedon flowprinciple

••Electroniccontrolofheating(HE) temperature

••Innovative,energy-savingcontrollerPTC2 +Pincombinationwithhigh performance heatexchangerforon-demandwater heatingwithoutno-loadlossesfunction

••Pipesconnectionintoporbottomof substation=Savingsininstallationscosts

••Pipesandheatexchangermadeofstainless steel,connectionswithEPDMgaskets.

••Minimizedriskoflimescale and bacteria formation

••Electricalwiringfromfactory-Plug&Play

••Capacity:upto53kWDHW, Radiator10-34kW,Floorheating8kW

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.

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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)

DHW: CAPACITY EXAMPLES, 10°C/45°C

	DHW		Supply flow	Return flow	DHW	Pressure
		Plate heat				loss
	capacity		primary	primary	tap load
		exchanger				Primary
	[kW]		[°C]	[°C]	[l/min]
						[bar]
	32.3	XB 06H-1 26	55	21.8	13.16	0.36
	32.3	XB 06H-1 26	60	18.9	13.16	0.24
	32.3	XB 06H-1 40	55	19.0	13.16	0.27
	32.3	XB 06H-1 40	60	18.9	13.16	0.24
	41.0	XB 06H-1 26	60	20.4	16.83	0.41
	41.0	XB 06H-1 26	70	16.8	16.83	0.23
	53.0	XB 06H-1 40	60	19.1	21.67	0.55
	53.0	XB 06H-1 40	70	15.7	21.67	0.31

	1	Plate heat exchanger HE		23	Sensor pocket for heat meter
	2	Plate heat exchanger DHW		24	Fitting piece for heat meter
	5	Strainer			3/4” x 110 mm
	6	Non-return valve		25	Controller Danfoss ECL210/
	7	Ball valve			A237
	8	Circulation pump HE		26	Outdoor sensor, ESMT
	11	Safety valve HE		27	Sensor Danfoss, ESMC
	12	Safety valve DHW		29	Actuator HE, AMV 150
	13	Thermometer		30	Multifunctional control valve
	14	Pocket for pressure gauge			AHQM
	15	Manometer		38	PT°C 2 controller
	16	Expansion vessel		40	Thermostat for bypass/
					circulation
				------------------------------------------
				Options:
			HE	57	Safety thermostat monitor
			Supply	Note: The distance between the DH supply
				and the DH return pipe (100 mm) provides
			HE	sufficient space for insulation of the supply
				pipes.
			Return
40	470	40	Recirculation:
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			Remember to order circulation set for systems

that feature DHW recirculation.

			Connections:
			1. District heating (DH) supply
	<![if ! IE]> <![endif]>610		2. District heating (DH) return
		<![if ! IE]> <![endif]>780	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
	<![if ! IE]> <![endif]>42
		•	Circulation set for DHW recirculation

			550				Wall
62,5	100	130	65	65	65	62,5
<![if ! IE]> <![endif]>44

<![if ! IE]>

<![endif]>381

•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)

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

		HEATING: CAPACITY EXAMPLES					TOTAL
Flow rate		Heating	Plate heat	HE circuit	HE circuit		Pressure loss	Flow rate
				primary	secondary		primary	primary
primary		capacity	exchanger
[l/h]				[° C]	[° C]		(total3) bar	(total3) [l/h]
840		19	XB06H-1 26	70/40	35/60		0.405	9205
		31	XB06H-1 40	70/40	35/60		0.875	11605
680
		8	XB06L-1 242	70/31	30/352		0.175	6605
770
		7	XB06H-1 402	70/31	30/352		0.175	6505
680
		10	XB06H-1 40	60/30	25/55		0.294	8804
890
		34	XB06H-1 26	90/44	40/70		0.496	8406
660
1110
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

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