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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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
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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 [email protected]
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 [email protected]
www.pewo.at