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-, process- and 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-o valves, balancing valves / ow limiter, safety valves, thermometers as well as ready-to-mount pipes and ttings.

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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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. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

CIRCUIT DIAGRAM - EXAMPLE

DH Supply

DH 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

LV50-1000 169 kg Dimensions, tank:

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

128571

345

1000 L: Dia.1060

750 L: Dia.920

350 - 500 L: Dia.720

200

300

340

350 L: 1750

750 L: 2130

500 L: 1890

1000 L: 2180

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, WEIGHT AND DIMENSIONS

Capacity Primary

Akva Therm II

LV Ty pe

LV16-350 350 15 25 537 800 352 0.19 478 LV20-350 350 18 40 860 1123 406 0.19 76 4 LV20-500 500 22 40 860 1235 518 0.19 764 LV36 -350 350 36 80 172 0 1983 549 0.25 1529 LV36 -50 0 500 41 80 172 0 2095 662 0.25 1529 LV36 -750 750 47 80 172 0 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 114 4 0. 21 2102

Tan k

volume

No. of

apartments.

(guiding)*

Heat

exchanger

(kW)

Constant,

DHW

(l/h)

Max. capacity

(l/h)

Max. capacity

l/10 min.)

Pressure loss

bar

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

Flow

(l/h)

VL.GE.E3.02