PEWO LINE OF PRODUCTS District heating substations pewoCAD · Heating and cooling manifolds pewoSplit · House substations pewoCompact and pewoV-max· Consumer units pewoTherm · Domestic hot water systems pewoAqua Supply registers pewoVario · Control and communications technology pewoControl · Monitoring technology pewoLive

DOMESTIC HOT WATER HEATINGPEWO SYSTEMS FOR EVERY APPLICATION – HYGIENE AND SAFETY

3

In a decentralised system, the Domestic hot water

heating takes place near the tapping point(s). The cen-

trally generated thermal energy is distributed in the

building as heating circuit water by a pipeline network

consisting of flow and return. Cold tap water is heated

up to the desired temperature by a plate heat exchang-

er in the hydraulic interface unit using the flow-through

principle. The consumption can easily and precisely be

measured by integrated heat and water meters.

In contrast, centralised Domestic hot water heating

has additional pipework for Domestic hot water and

circulation. The heating takes place in a central facility

using the flow-through or tank charging principle.

The advantage of both systems is a very high Domes-

tic hot water convenience. Due to the centralised heat

generation, both concepts are directed at the future.

Maximum availability and high flexibility can be en-

sured by cascaded heat generators.

>> For those striving to combine the sanitary benefits

of a flow-through system with the advantages of stor-

aging, PEWO offers a solution with the tank-charging

pewoAqua L product line. Numerous combinations of

charging powers and tank sizes

are available. Times of elevated

Domestic hot water demand

(consumption peaks) are cov-

ered by the storage tank. An

anti-legionella set-up prevents

sanitary hazards.

A short overview centralised or decentralised? DECENTRALISED

DOMESTIC HOT WATER HEATING

Exempt from the examination require-

ment: Distributed Systems < 3 liters

� HIGHEST SANITARY LEVEL OF POTABLE WATER

� no potable water storaging

� generation according to

demand by flow-through

� short pipeline ways

� LOW OPERATING COSTS

� integration of renewable

energy sources (heat pump,

solar heating) with high

efficiency

� Small line losses through

low flow and return tem-

peratures (50 °C / 25 °C)

� No circulation needed

� SIMPLE AND PRECISE METERING

� integrable heat and water

meters

� Remote data reading /

smart metering

� POTENTIAL FIELDS OF APPLICATION

� Apartment

� Commercial unit

� Sports facilities

� Public building with high

sanitary requirements

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Buffer tank

CENTRALISED DOMESTIC HOT WATER HEATING

Our systems pass every test successfully!

Hygienic thanks to flow-through!

� HIGHEST LEVEL OF HYGIENE AS TO POTABLE WATER

� no Domestic hot water

storaging in a flow-

through system

� centralised generation

according to demand

using continous-flow

water heating principle

� LOW INVESTMENT COSTS

� optimal dimensioning

considering simultane-

ousness (e.g. for 100

apartments the simulta-

neousness factor is 6)

� LOW OPERATING COSTS

� possible application of a

solar-powered pre-heating

stage for increased yield

� PREMIUM OPTION � extremely resistant to

corrosion

� plate heat exchanger

without nickel or copper

solder

� INDIVIDUALLY CUSTOMISED

� according to existing tech-

nical terms for connections

(provided by the customer)

� object-related planning

and design

� FIELDS OF APPLICATION

� one-family houses

� apartment houses

� large-scale buildings

decentralised domestic hot water heating centralised domestic hot water heating

0

-1

+1

+n

+2

thermostatic

control

pewoAqua DP25 for up to 50 apartments

pewoAqua DP32–40for up to 300 apartments

pewoAqua DP50 for up to 400 apartments

�OPTIONAL � integrated circulation

pump

� optional 3-way/mixing

valve

� high efficiency pump

� control valve

� CONTROL TECH-NOLOGY AND BUILDING AUTO-MATION SYSTEM

� easy integration via stan-

drad interfaces (Modbus,

BacNet, LON, KNX)

� remote diagnosis

� alerting

� online supervision

High efficiency pump

and control valve

PST heat

insulation

casing

only

55 –75 cm

(ca. 22–30“)

in width;

slim device,

max. 30 cm

(ca. 12”)

in depth

pewoAqua DV

DOMESTIC HOT WATER HEATER FOR ALL REQUIREMENTS

� DDC

�PRECISE REGULATING

NATURALLY, PEWO STATIONS MEET THE REQUIREMENTS OF THE WORLD’S STRICTEST REGULATION ON POTABLE WATER – THE NEW GERMAN TRINKWASSERVERORDNUNG!

� Overall solutions for efficient heat distribution

and Domestic hot water

� System counselling for assistance during de-

sign, planning and choice of products

� Counselling regarding intelligent regulating

strategies

� Commissioning

� User training regarding control technology

operation

� In-house or out-house fitter instructions for

operating HIUs

� Operational management instructions

� System optimization after commissioning

through monitoring and data analysis

PERFORMANCES AND SERVICES

QUALITY AND SECURITY IN ACCORDANCE TO ISO 9001

PEWO stations meet the highest quality requirements.

PEWOs DHW systems fulfil all ordninances and guid-

ances of the German gas and water association (DVGW).

In close cooperation with our customers we implement ide-

as concerning custom designed circuitries. PEWO addition-

ally offers field-tested circuitries that are being improved

and developed continuously in our in-house R&D laboratory.

The domestic hot water systems of the product line

Aqua are integrated in house substations

pewoCompact and consumer units pewoTherm!

1

The right choice Flat wanted. Corresponding pewoAqua station provided.

1) NO. OF APART-MENTS

TYPE Hot water output

2)Off-rate 10 to 60 °C

Off-rate 10 to 45 °C

Recom-mended charging

Recom-mended buffer tank

kW l/min l/min kW Liter2 pewoAqua DP 18–50 TFS 50 14 21 10 500

5 pewoAqua DP 18–70 TFS 70 20 29 15 800

14 pewoAqua DP 25–90 E 90 26 37 25 1000

30 pewoAqua DP 25–120 E 120 34 49 35 1000

50 pewoAqua DP 25–150 E 150 43 62 45 1000

80 pewoAqua DP 32–180 E 180 52 74 55 1500

100 pewoAqua DP 32–220 E 220 63 90 60 1500

150 pewoAqua DP 40–250 E 250 72 103 75 2000

200 pewoAqua DP 40–300 E 300 86 123 85 2000

300 pewoAqua DP 40–350 E 350 101 144 130 3000

400 pewoAqua DP 50–500 E 500 144 205 155 3000

>400 on request

1) No. of flats: Simultaneousness according to the Dresden technical university, aver-age tap performance per apartment 14 l/min resp. 30 kW with 45°C

2) maximum tap performance:According to DVGW (German as-sociation for gas and water) work sheet W551 reference to DIN 4708, the hot water outlet temperature can fall below 60°C at periods of peak demand. It should be pointed out that according to DVGW work sheet W551 large scale plants at all times (excluding periods of peak demand according to DIN 4708) must provide a hot water outlet temperature of 60°C as well as a circulation pump return tempera-ture of 55°C for 16 of 24 hours.

CHARACTERISTICS Product pewoAqua DP, Heating water flow 65–70 °C, Heating water return 18–28 °C, max. temperat-ura heating water 95 °C (110 °C on request), nominal pressure heating water PN 10 (PN 16 on request), domestic hot water PN 10

Apartments

2

Simultaneity

2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90100 200 300 400

3

4

5

6

78910

COINCIDENCE FACTOR

©Copyright 2012 PEWO Energietechnik GmbH. PEWO®, CAD®, DAC®, Split®, Switch® and Vmax® are trademarks of PEWO Energietechnik GmbH.

Reprinting or reproduction even of ex-cerpts is only permitted with the approval of PEWO Energietechnik GmbH, 02979 Elsterheide, Germany. Errors and techni-cal modifications are reserved. Any per-

formance diagrams, statements and tables only serve to provide better understanding. They do not make authorita-tive statements concerning our complete or current product programme and therefore provide no basis for planning.

IMPRINTPEWO Energietechnik GmbH

Geierswalder Straße 13

02979 Elsterheide, Germany

PHONE +49 3571 4898-0

FAX +49 3571 4898-28

EMAIL info@pewo.de

www.pewo.de

2. Edition, Mai 2012

PEWO ist Mitglied von

PEWO Austria GmbH

St. Peter 12, A-8843 St. Peter

am Kammersberg, Austria

PHONE +43 3536 73908

FAX +43 3536 73908

EMAIL info@pewo.at

www.pewo.at