History and Experience

In 2005, presented the first prototype of Max.E. At that time, we were among the
first and very few companies in EU that developed such a hybrid solution for fresh air.
Where are we 9 years later?

• More than 400 e-conomizers produced, deliv-

ered, installed and commissioned in several EU
territories with different climates, such as:
Bulgaria, Denmark, UK, Romania, Macedonia,
Moldova, Ukraine, Estonia and started activity in
BeNeLux and the Middle East region.

• Our experience and confidence comes from

3 generations of “e-conomizers”:Max.E; ,
and now ...

• DV_Select - since the very beginning we have

developed a specialized selection tool for design- Max.E
ers/consultants and engineers, simulating and cal-
culating all processes inside the units. Now we
are delivering our 3rd version of it: DV_Select 3.1

• Focus - since the first prototype of Max.E, we

put all our efforts and focus on the continuous
development of this solution, making it the only
one in our Product catalogue...

• - a unique e-conomizer, desig-

ned especially for the Middle East region (very hot
and humid climate) which treats fresh air up to
+60°C! max.Â2

• Beside the Comfort Ventilation segment, our

e-conomizers are successfully applied in many
project sites of the Process Ventilation (where T
and RH must be maintained in very narrow limits),
such as: hospitals, micro-electronics, food indus-
try, chemical industry and more...

max.Â3
 3eConcept
• Every Climate from -25°C to +60°C (a widely
OPERATION RANGE extended temperature range, in comparison with
the ), reaching ambient temperatures of
HEATING COOLING
up to +60°C with the newly developed “e-cono-
60
55 mizer” wich is especially desig-
50 ned for a very hot and humid climates such as
Outdoor temperature (°C)

45 found in the Middle East.

40
35 • Every Application - suitable for every applica-
30
tion where HVAC and 100% fresh air is needed, by
25
20
means of covering all possible air-treatment
15 processes, such as:
10 • Filtration
5
• Recirculation - 0÷100%
0
• Heating/cooling/humidity recovery
-5
-10 • Heating
-15 • Cooling + Dehumidification
-20 • Humidification (optional)
-25

15 22 30
• Every Installation - suitable for all types of
mounting - indoor (machinery rooms, technical
Room temperature (°C)
floors etc.) and outdoor (roofs).

2 stage heating/cool-
ing/humidity recovery
technology

Recovering up to 100% of the extract heating/cool-

ing, achieved - “consecutively” in 2 stages:

• 1st stage - the sorption rotary heat exchanger,

recovers more than 70% of the heatig/cooling and
humidity.
• 2nd stage - the evaporator/condenser of the air-
to-air heat pump, recovers the rest up to 100%.
In relation to the newest EU regulations, which impose the design of the so called Passive or
Low Energy Buildings, (where heating losses/cooling loads are reduced to the minimum by
using efficient and innovative insulation materials and sun shading systems), then fresh air
becomes the only needed source for maintaining the room’s microclimate parameters.

“All in 1” concept

A multifunctional concept solution for fresh air, -

(as well as for covering heating losses and cooling
loads at once), which can practically solve entire-
ly the need for Air-Conditioning, Ventilation and
Heating at the project site by using only air as
fluid. Thus, radiators/fan coils/cassettes, boilers,
chillers/VRF systems, pipes, insulations, pumps,
fittings, etc., are no longer required. It only needs
a duct system, - (which already exists in every
conventional system) - and the correct designing
of the necessary air quantity.
100% DX unit
100% factory tested No additional water, electric or DX heating/cooling
High reliability and reduced installation costs, coils are needed in the , which makes it
achieved by 100% factory tests - each unit is test- independent to other additional heating/cooling
ed under factory conditions. The test includes: sources (boilers, gas, chillers, VRF systems, etc.)
• Leakage check,
• Vacuuming and loading the system with
the exact refrigerant quantity,
• Functional testing of all fans and com
pressors,
• Vibrations,
• Loading the controller`s software,
• Temperature and pressure checks,
• Setting up the required air flow and
• Recording all parameters of the unit on the
test list. 1853 and PED 97/23/EC, Category II,
Module A1- Internal manufacturing checks with
100% Plug & Play monitoring of the final assessment
A standalone “one-piece” unit, which only needs certified by TUV-Rheinland
a duct system and power supply for its start up.
 Savings

Being an “All in 1” concept and having only 1 solu-

tion on the project site, saves: New Models
• Initial investment costs - in comparison to con- Together with the already existing models 02, 03,
ventional HVAC equipment, it reduces the invest- 06 and 09, two new models were developed as
ment costs by removing the need for: radiators/fan “standard ” : 15 with maximum airflow
coils/cassettes, boilers, chillers/VRF systems,
of 15.000m3/h (replacing Max.E-13.0) and 18 with
pipes, insulations, pumps, fittings and more.
maximum airflow of 18.000m3/h.
• Installation costs and labor Additionally 3 larger models can be produced,-
(based only on customer request): - 25,
• Installed electric power - it can reduce up to 30 and 35 with maximum airflows as follows:
30% the necessary installed power for a HVAC 25.000m3/h; 30.000m3/h and 35.000m3/h, respec-
system.
tively.
• Energy and exploitation costs - providing
COP/EERnet = 5-15 , ensures the lowest Reliability
possible energy costs for HVAC (EUR/kWh).

• Service and Maintenance costs - Filters are the Models -06 and 09 are designed with 2
only components that need to be checked, cleaned and 3 fans in parallel per each side (supply and
and replaced. exhaust) and contain 2 compressors in tandem.
Models -15 and 18 are designed with 2
• Time - it saves time in designing, installation fans in parallel per each side (supply and exhaust)
works, start-up and commissioning, service, etc... and with 4 compressors in 2 refrigerant circuits.
Models -25, 30 and 35 are designed with
• Space - whether - is mounted indoor
2 fans in parallel per each side (supply and
or outdoor, the absence of additional pipes, pro-
exhaust) and contain 8 compressors in 2 refriger-
vides a “clean roofs” for the buildings.
ant circuits. This generates the highest reliability
• BMS - significantly reduces the costs for a BMS and safety of the unit in case of failure some of
system for regarding its HVAC part. those components, as well as ensuring that the
unit works continuously.
 COP/SCOP/SPF
Higher than the highest standards!

According to EN14825, the highest Energy

Efficiency Class for Heat Pumps is A+++ with a
SCOP=3,75 (high temperature) -4,38 (low tempera-
ture).
With a SCOP=3.8-6.5 (of the refrigerant circuit) and
a COPnet of the whole system SCOPnet= 5-15 ,
is far ahead of the competition.

Note
*SCOPnet- seasonal efficiency of a unit in active heating
mode, without supplementary electric heaters which is deter-
mined from mandatory conditions given in this EU standard
and used for marking, comparison and certification purposes

Qrotary exchanger + Qheat pump

Performance COPnet =
Nfans + Ncompressors
Where:
1. Qheat recovery - recovered heat in the
Improvements and advantages of the, rotary heat exchanger (kW)
compared to : 2. Qheat pump - heating capacity of the con-
denser of the heat pump (kW)
• Airflow - models 03, 06 and 09 are designed to 3. Nfans - energy consumption of both
cover up to 4.000; 8.000 and 11.000m3/h, which (supply and exhaust) fans (kW)
respectively is 25, 14,2 and 10% higher values 4. Ncompressors - energy consumption of
than the same models of the . the compressors (kW)
• Increased Total Filtration Area (m2) by 45%.
• Decreased Total Internal Pressure Drop (Pa) by • 30-45% higher Total Cooling Capacity (kW) and
20-40%, leading to even lower SFP numbers and respectively up to 40% higher EERnet = 5.5 in
energy consumption of the fans. Total Internal summer mode, thanks to the sorption type rotary
Pressure Drops per side, are lower than 300Pa. wheel.
• Sound Pressure Level - reduced up to 5 dB(A). • Precise Condensing Temperature/Pressure con-
• Higher Total Heating Capacity (kW) by 30-35% trol during the summer mode.
and COPnet of the whole system reaching • Up to 78% humidity recovery during the winter
COPnet ≥ 15 . This is achieved by using a rotary mode, improving the indoor climate comfort and
heat exchanger and lower energy consumption of reducing the need of additional humidifiers
the fans. • Step less Capacity Control (as standard) allows
superior Tsupply/Troom (°C) control and increases
the efficiency during Part-Load operations; thus,
increases the ESEER/IPLV and expands the life-
time of the compressors.
 Sorption Cooling
Recovery Technology

New sorption rotor range, molecular sieve

HX1 and HM1 - Molecular Sieve 3Å

• Lower investment cost in cooling

• Lower energy consumption in cooling period
• Better performance for dry cooling systems
• Lower investment costs and energy savings from
day 1
• Helpful solution when cooling capacity is limited
in existing systems

High humidity efficiency, up to 80%

Sorption rotors are providing an excellent method

to precool and dehumidify the fresh air before
entering the DX cooling coil. Both Molecular sieve
(HX1) and Mole-cular Sieve (HM1) 3Å sorption
wheels are giving exceptional high humidity trans-
fer efficiencies. In general, humidity efficiency is
more or less equal to temperature efficiency.

3Å molecular sieve gives high selectivity

for absorbing water molecules (HM1 type)

• Molecular Sieve 3Å coating shows a high selec-

tivity for absorbing water molecules.
• It is recommended in cases where cross contam-
ination needs to be avoided.
• No odor problems.

Lower running cost of ventilations and

cooling system

• Cooling recovery in summer time.

• Drying supply air with drier exhaust air, less
water condensing in cooling coil.
• Efficient dehumidification of fresh air in extreme
conditions due to almost constant (humidity effi-
Please fill out the requested information
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ciency, less need to increase water temperature.
 The “Evolution” in the
fan Technologies...
Continues

Using EC Blue fans, ensures the highest Innovation at a glance

IE4 Premium Efficiency and ErP conformity- • Significant weight reduction, which reduces
2015/EC controller integrated. motor bearing loads and increases the system
service life.
The EC Blue fans are extremely light, stable,
• Drastic reduction in noise generation.
durable, quiet and extremely efficient.
• Significant increase of the impeller efficiency,
The high-performance composite material Cpro which reduces the absorbed power.
ZAmid®, developed using the latest insights, • Reduced power consumption - Up to 15% ener-
makes the impeller significantly lighter than those gy savings during operation.
made of steel - and offers superior mechanical • Significant CO2≤ reduction.

properties. ZAmid®, provides new opportunities • Improved mechanical properties, in comparsion

for system runtimes, enables lower power con- to steel impellers.
sumption and leads to a drastic reduction in noise. • No weld seams.
• High peripheral velocities up to 70 m/s. Can be
Cpro ZAmid® is manufactured using a one - shot
combined with various types of motors.
injection-moulding process in a highly complex
• Tonal noise reduction up to 5dB.
injection-moulding machine, resulting in no weld-
• Suitable for operational temperatures from -20°C
ed joints. This highly technical process ensures
to +80°C, in comparsion to steel impellers.
the highest system reliability.
• Corrosion-free
• No toxic gas emissions
• Colour-stable

Standard AHU Max.E max.Â2 max.Â3

 SFP

SFPe - even lower values, compared to

Specific Fan Power (SFPe) ≥ 1700 W/m3/s- total for

the unit, and lower values can be achieved by

The system's Specific Fan Power (SFPe) calcula-

tion is based on clean filters and acc. to EN13779
• SFPe=(Psfm+Pefm)/qmax [W/m3s], where:
• Psfm- power supplied to the supply air
fan (W); Pefm- power supplied to the
exhaust air fan (W)
• Qmax - largest supply or extract airflow
through the AHU (m3/h)

Defrost = 0min

When an air-cooled heat pump is operating in

heating mode, the outdoor air is relatively cool and
the outdoor coil acts as an evaporator. Under cer-
tain conditions of temperature and absolute
humidity, frost might form on the surface of the
evaporator. The layer of frost will interfere with the
operation of the heat pump by making the pump
work harder and, therefore, inefficiently. The heat
pump unit will defrost regularly when frost condi-
tions occur.
The defrost cycle should be long enough to melt
the ice, and short enough to be energy-efficient,
but still takes 9-20min/cycle and might happen
many times/day... This reduces the comfort into
the air-conditioned room.
practically has Defrost=0min , because
at any ambient condition, the humidity from the
room is absorbed and recovered up to 80% by the
rotary heat exchanger and transferred to the sup-
ply air, moving the conditions of the air entering
the evaporator- away from the frost forming condi-
tions.
Connectivity
and Mobility

The built-in pCO Web circuit board, allows a per- gateways (Modbus®, BACnet®, Johnson
manent Internet connection to max.e3 from any Metasys®, DLL for Windows®, TCP/IP, SNMP,
location in the world - and brings the following LonWorks®).
advantages for the unit:

• Possibility for “Remote Start-up” from the In addition, the pCO system controllers are able to
factory - significant reducing the time and receive and send SMS messages using a simple
costs for this service. GSM modem.
• “Remote Monitoring”- checking all para-
meters of the unit in real time.
• Software updates and changes of working
modes and settings.
• Rapid reaction and diagnostics in case of
occurred problems.
• Time schedules, curves and trends
• Overall reducing of Service and mainte
nance costs.

BMS - It can interface to the more widely used

communication standards, either directly or via
 DV_Select 3.0

The most important tool for every

designer/consultant!

Our newly developed 3rd generation of software,

DV_Select 3.1, serves as a selection tool for all of our
“e-conomizer” units ( , ,
and , ).

To this day, is among the very few com-

panies, that has successfully developed software
for such hybrid solutions.

The main characteristics and advantages of

DV_Select 3.0 are:

• Friendly interface - Light, Fast and Easy to

work with
• Winter/Summer calculations -Technical
Data and Drawing printouts - exported to pdf.
• General Data - including the most impor-
tant parameters of the unit such as:

Total Cooling/Heating Capacity(kW),

Supply air temperature(°C),
Total Power Input(kW),
COP/EERnet,
Specific Fan Power(SFPe) - total for the
unit(W/m3/s),
Refrigerant type,
Unit power supply (V/ph/Hz),
Sound pressure level (dB),
• Visualization of all air-treatment process
in the Mollier diagram.
 Environment

100% Eco-Friendly System - while

using, only air that is filtered and ther-
modynamically treated is supplied to the room.
The absence of internal units, totally removes the
risk of refrigerant leakage, as well as all related
commissioning works.

Low refrigerant content

Each unit size has a limited refrigerant content in
accordance with Regulation No. 842/2006 issued
by the European Parliament and Council which
make obligatory controls more frequent as the
load of each individual circuit increases.
is only required to be controled once
per year.

• Refrigerant - eco friendly

• Respect for the environment
 General Technical Data

AHU Type 02 03 06 09 15 18
Min/Max Airflow m3/h 1000/2000 2000/3200 4000/7000 5500/10000 9000/15000 13000/18000
General Data
Nominal Airflow m3/h 1500 2500 6000 9000 13000 16000
Total Cooling Capacity (1) kW 15.3 24.9 57 80.2 120.2 145.7
Total Heating Capacity (2) kW 26.3 46.6 107.7 156 227.2 275.8
COP net (1) - 12.0 11.9 13.5 15.4 13.8 13.5
EER net (2) - 4.36 3.96 4.62 5.48 4.81 4.75
Filters Types
Type Glass Micro Fiber Microcell
Filtration Class F F5 F5 F6 F6 F6 F6
Filtration Efficiency % 55 55 60 - 80 60 - 80 60 - 80 60 - 80
Total Filtration Area 2
m 2.7 4.1 37.2 46.5 65.1 65.1
Fans íype - Eë Plug fan
Motor Efficiency % IE4 Premium Efficiency, ErP conformity- 2015/EC controller integrated
Specific Fan Power (SFP) W/(m3/s) 1726 1450 1460 1554 1620 1804
Supply / Exhaust static pressure ΔPs Pa 250 250 250 250 250 250
Installed Motor Power supply side 2.5 2.5 2 x 2.5 3 x 2.5 2 x 3.6 2 x 3.6
kW
exhaust side 2.5 2.5 2 x 2.5 3 x 2.5 2 x 5.6 2 x 5.6
Installed Current supply side 4.0 4.0 2 x 4.0 3 x 4.0 2 x 5.8 2 x 5.8
A
exhaust side 4.0 4.0 2 x 4.0 3 x 4.0 2 x 8.6 2 x 8.6
Protection Class IP 55
Rotary Heat Exchanger-sorption type Aluminium foil with sorption molecular sieve (HM1)
Efficiency - Temp./Hum. % 77.1/81.1 76.7/80.7 75.6/79.6 74.4/78.4 74.7/78.7 73.0/76.2
Recovered Heating Capacity (1) kW 22 36.5 86.2 127.5 184.6 221.3
Mass Transfer Humidity(1) I/h 10.8 17.9 42.5 62.8 91 108.4
Compressor Rotary Scroll
Number of compressors 1 1 2 2 4 4
Number of circuts 1 1 1 1 2 2
Winter Mode Power Input kW 1 x 1.46 1 x 2.91 2 x 2.77 2 x 3.11 4 x 2.66 4 x 3.09
Summer Mode Power Input kW 1 x 2.82 1 x 5.36 2 x 5.01 2 x 5.47 4 x 4.87 4 x 5.73
Max. Full Load Current A 12.8 1 x 14.1 2 x 14.1 2 x 14.5 4 x 14.1 4 x 14.5
EER(2) 2.76 3.24 3.61 3.36 2.95 3.07
COP(1) 2.92 3.48 3.89 4.58 4.01 4.41
Total Power Input
(compressors + fans) (2) kW 3.5 6.3 12.3 14.6 25.0 30.7

Total Installed Power

(compressor + fans) kW 7.75 11.0 22.0 29.0 42.4 46.4

Connection Voltage V/Ph/Hz 400 / 3 / 50

(1) Exhaust Air 22°C/50%, Fresh Air -15°C/80%

(2) Exhaust Air 26°C/50%, Fresh Air 34°C/44%
 Dimensions

Ç Ä B Ä

Supply

CxJ
DxE
Fresh

H
GxK
Room
FxE

Exhaust

02 03 09 06
L 3000mm L 3000mm L 3250mm L 3250mm
B 950mm B 1340mm B 1860mm B 1610mm
H 1410mm H 1410mm H 2060mm H 2060mm
E

DxE 515x600 DxE 515x980 DxE 930x1370 DxE 870x1195

FxE 545x600 FxE 560x980 FxE 930x1370 FxE 910x1370
CxJ 545x600 CxJ 560x980 CxJ 930x1370 CxJ 880x1370
GxK 515x600 GxK 515x980 GxK 930x1370 GxK 870x1370
L

B Ä B Ä
Fresh
DxE

Supply
CxJ

E
H

FxE

Exhaust
GxK

Room

L Ç

15 18
L 3800mm L 4100mm
B 2330mm B 2390mm
H 2415mm H 2580mm
E

DxE 900x1845 DxE 850x2270

FxE 900x18450 FxE 1300x2270
CxJ 900x1845 CxJ 1300x2270
GxK 1235x1845 GxK 850x2270
 is the subject of continuing improvement
and future development! Following its policy of
continuous improvement, reserves the
right to make any further changes without the need
to inform its customers and partners.

www.damvent.com
Burgas 8009, Bulgaria
Todor Grudov blvd
Tel.: +359 56 878 405
Fax: +359 56 878 417
marketing@damvent.com