Danfoss Akva Therm II LV Fact sheet

Fact sheet

Akva Therm II LV

Domestic hot water charging system for hospitals, restaurants, sporting centres as well as commercial buildings and apartment blocks

Application

The Akva Therm II LV is a compact and effective domestic hot water (DHW) charging system.

It optimally combines the two systems, storage water heating and instantaneous water heating and is applicable for hospitals restaurants, sport centres as well as commercial buildings and apartment blocks, where a constant DHW temperature even during peak consumption periods is needed.

The Akva Therm II LV can be supplied from district heating supply networks, from low-temperature or condensing boilers, solar-, processand waste heat systems.

Domestic hot water

The Akva Therm II LV charging system is delivered as a set consisting of a stainless steel DHW cylinder, a brazed, stainless steel plate heat exchanger, Danfoss XB37H-1, Danfoss ECL 310 for control of the charging temperature and temperature in the DHW cylinder, Wilo low-energy circulation pump, shut-off valves, balancing valves / flow limiter, safety valves, thermometers as well as ready-to-mount pipes and fittings.

Domestic hot water circulation

The Akva Therm II LV charging system is supplied with connection for DHW circulation. The DHW circulation pipe connection is placed directly on the cylinder.

Design

A total of 24 standard applications are available in the LV series, however, the possibilities are many, as the heat exchanger size and cylinder volume can be combined according to requirement. The capacities of the heat exchangers range from 25 and 110 kW and the tanks are available in sizes from 350 to 1000 liters. The standard executions supplies 12 to 69 apartments. For other sizes, please contact our sales department.

Long life

The use of acid-resistant, stainless steel for pipes, tank and heat exchanger, and dezincification-resistant brass for T-pieces, components and valves, as well as approved components secures the charging system a long life.

Good operating economy,

By using Danfoss automatics for the control of the Akva Therm II LV charging

system the system is optimized in order to achieve higher efficiency and better cooling. The LV unit is characterized by a good stratification in the cylinder. Circulation is connected to the cylinder center and the return does not affect the stratification of the system. The electronic control and stratification ensures excellent operating economy.

Serviceability and ease of assembly

The charging unit can easily be mounted and serviced, as all parts are assembled with nuts and gaskets.

FEATURES AND BENEFITS

•Charging system for domestic hot water

•Can be supplied from district heating supply networks, from low-temperature or condensing boilers, solar, process and waste heat systems

•Available in standard executions for supply of 12-69 apartments

•Electronic control - excellent operating economy

•Pipes, cylinder and heat exchanger made of stainless steel

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CIRCUIT DIAGRAM - EXAMPLE

Supply

Return

Supply limit

DCW

Technical parameters:
Nominal pressure:	PN 16 / PN 10
Max. temperature:	95 °C (construction temp.)
Min. ΔP:	See capacity examples
Weight incl. packing: LV16-350		79 kg
	LV20-500	95 kg
	LV36-750	145 kg
Dimensions, tank:	LV50-1000	169 kg

LV16-350:	H 1750 x D 720 mm
LV20-500:	H 1890 x D 720 mm
LV36-750:	H 2130 x D 920 mm
LV50-1000:	H 2180 x D 1060 mm

DHW

Circ.

	155
<![if ! IE]> <![endif]>128	1	4	<![if ! IE]> <![endif]>300
<![if ! IE]> <![endif]>571			<![if ! IE]> <![endif]>340
			<![if ! IE]> <![endif]>1750	<![if ! IE]> <![endif]>L:10002180
			<![if ! IE]> <![endif]>500 2130L:750	<![if ! IE]> <![endif]>L:10002180
	2	6	<![if ! IE]> <![endif]>L: 1890
	2		<![if ! IE]> <![endif]>L:
			<![if ! IE]> <![endif]>350

3	5
	1000 L: Dia.1060
	750 L: Dia.920
350 - 500 L: Dia.720
200

2.Brazed plate heat exchanger, stainless steel AISI 316

7. Ball valve

9. Charging pump

12.Safety valve DHW 10 bar

13.Thermometer

17. Air valve

20. Balancing valve

25.Domestic hot water control ECL 310, app. 217

28. Sensor

31.Actuator 1

32.Valve 1

37.Fully insulated storage tank, stainless steel

Connections:

1. District heating (DH) supply

2. District heating (DH) return

3. Domestic cold water (DCW)

4. Domestic hot water (DHW)

5. Circulation (optional)

6. Circulation

Connections (examples):
LV16-350:	DCW,DHW 1“	DH., Circ. ¾“
LV20-500:	DCW,DHW 1½“	DH ¾., Circ. 1“
LV36-750:	DCW,DHW 2“	DH., Circ. 1“
LV50-1000:	DCW,DHW 2“	DH., Circ. 1“

DHW: CAPACITY EXAMPLES 60/15 - 10°C / 50°C

					Capacity			Primary

Akva Therm II	Tank	No. of	Heat	Constant,		Max. capacity	Max. capacity	Pressure loss	Flow
	Tank	No. of
	volume	apartments.	exchanger	DHW
LV Type	volume	apartments.	exchanger	DHW		(l/h)	l/10 min.)	bar	(l/h)
LV Type		(guiding)*	(kW)	(l/h)		(l/h)	l/10 min.)	bar	(l/h)
		(guiding)*

LV16-350	350	15	25	537		800	352	0.19	478
LV20-350	350	18	40	860		1123	406	0.19	764
LV20-500	500	22	40	860		1235	518	0.19	764
LV36-350	350	36	80	1720		1983	549	0.25	1529
LV36-500	500	41	80	1720		2095	662	0.25	1529
LV36-750	750	47	80	1720		2283	849	0.25	1529
LV50-500	500	58	110	2365		2740	769	0.21	2102
LV50-750	750	63	110	2365		2928	957	0.21	2102
LV36-750	1000	69	110	2365		3115	1144	0.21	2102

Danfoss Redan A/S · District Heating · Omega 7, Søften · DK-8382 Hinnerup · Denmark

Tel.: +45 87 43 89 43 · Fax: +45 87 43 89 44 · redan@danfoss.com · www.redan.danfoss.dk

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice.This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary eady agreed.

VL.GE.E3.02