zehnder nest systems radiant conditioning solutions

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Heating Cooling Fresh air Clean air

Zehnder NEST systems

Radiant Conditioning Solutions

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The next generation ofradiant conditioning systems...

Enjoying the greatest comfort at home and in the workplace is more than just a desire; it’s one of our most fundamental needs.

To meet these needs, Zehnder has developed the most complete system on the market, to provide the perfect indoor environments incorporating optimal temperature and humidity conditions all year round.

The technologies used eliminate the disadvantages typically associated with traditional systems, such as fluctuating temperatures or draughts. In fact, by using one of many structures already in place, whether a wall or ceiling, an even temperature can be achieved easily.

Zehnder Nestsystems uses water at very low temperatures in winter (27-30°C instead of the usual 70-80°C) and relatively high temperatures in summer (15-20°C compared to the usual 7-12°C), resulting in satisfaction not only for the body and mind, but also for the pocket.

That’s what we at Zehnder call absolute comfort.

Contents:

What is NEST 4

How it works 6

Build your system 8

Performance 10

Applications 12

Technical specification data 13

4

What is NEST..?

Heating, cooling and dehumidification

systems for the perfect indoor climate.

Zehnder Nestsystems comprise of a

network of panels which boast dual

heating and cooling functionality,

rapid response times, exceptional

controllability and superior energy

efficiency.

Zehnder radiant heating and cooling

elements are incorporated into a

specially designed plasterboard panel

which effectively replaces a standard

panel within the wall or ceiling and

enables it to be fitted as part of the

general construction of the building.

Benefits:

� Clean, non-obstructive aesthetic design

� Complete controllability and regulation of temperature and humidity to create the perfect indoor climate

� Ideal for low temperature systems (up to 50°C)

� Energy savings of 30-50%

� Output in accordance with EN14037 for heating and EN 14240 for cooling

NEST Radiant Conditioning Systems installed within the ceiling and walls

Aesthetically pleasing without compromising architectural design

Creates the perfect indoor climate

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Introducing Zehnder NIC radiant panels...

Prefabricated sandwich panel:

� Plasterboard, polystyrene foam panel and plastic pipes.

Hydraulically balanced:

� The system is self balancing requiring no further alterations once installed.

Aesthetically pleasing:

� The radiant surface is finished in the same way as standard plasterboard panels.

Adaptable: � Suitable for both heating and cooling rooms

� Can be installed in the ceiling or on the wall

Easy to install:

� Noticeably reduces on-site installation times, requiring only plastering or decoration.

Connections:Quick-fit connections supplied as standard

Fully controllable: With the addition of advanced and self-regulating systems

Dehumidification units: When cooling, prevent the risk of condensation

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How it works...

Heating

Zehnder radiant panels replicate the

natural thermal effect of the sun. The

radiant panels are heated by hot water

and give off energy into the room. This

energy is only converted into a heating

effect when it meets the human body or

an object.

When heating with radiant panels, the

room air temperature is lower than

the resultant temperature but with the

same sense of perceived temperature.

The result is that energy usage and

costs are reduced due to the lower

difference between the room air and the

outside air temperature (Fig. 1). This is

especially effective when compared with

traditional air heating (Fig. 2).

Cooling

Cold water flows through the ceiling

panels making them the coolest item in

the room. Warmer items within the room

heat the air which then passes over

the cool surface of the panel and cools

down. The cooled air flows back into

the room.

In summer, when cooling with radiant

panels, the room air temperature is

higher than the resultant temperature

but with the same sense of perceived

temperature. The result is that the

difference between the room air

temperature and the outside air

temperature reduces the total cooling

load (Fig. 3) and, again, saves energy

and costs especially when compared to

traditional air cooling (Fig. 4).

Air temperature 18°C

Surface temperature 21°C

Perceived

temperature 20°C

Fig. 1: Air vs Perceived °C with radiant heating



Perceived

temperature 18°C



Perceived

temperature 25°C



Perceived

temperature 25°C

Fig. 2: Air vs Perceived °C with air heating

Fig. 4: Air vs Perceived °C with air cooling

Fig. 3: Air vs Perceived °C with radiant cooling

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Compared to other

systems...This is where radiant conditioning really

comes into its own:

Compared to more traditional heating

systems such as Underfloor Heating

and Active Building Systems, desired

temperatures can be achieved much

quicker with Zehnder Nestsystems due

to the capacity for self-regulation of

temperature fluctuations, thus saving

between 30 - 50% of energy usage and

costs (Fig. 1).

Zehnder Nestsystems also eliminate

the disadvantages typically associated

with alternative systems such as Fan

Coil Units. Not only are perceived

temperatures achieved more efficiently

(Fig. 2), radiant conditioning operates

virtually without noise nor has the

unpleasant draughts or associated

distribution of dust.

*1 To simulate the miscellaneous inertias of various systems, tests were carried out using a radiant ceiling panel, an underfloor heating system and an active building system. All systems were cooled to a surface temperature of 17°C. The systems were then subjected to the same mass flow and the same flow temperature until each system had achieved a surface temperature of approximately 35°C.

*2 The inertia testing of both Radiant Conditioning Systems and Fan Coil Units were carried out independently in a number of 5-star hotel rooms by Venice University.

8 hours

Active

buil

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syste

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45.0 °C

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Radiant ceiling panels Underfloor heating system Active building systemS

tart

tem

pera

ture

Beg

inn

ing

afte

r 1

min

ute

afte

r 2

ho

urs

afte

r 8

ho

urs

Time

1 m

inute

Rad

iant p

anels

2 hours

Under

floor

heati

ng sy

stem

Fig. 1: Zehnder Radiant Conditioning vs Underfloor Heating & Active Building Systems*1

Fig. 2: Zehnder Radiant Conditioning vs Fan Coil Units*2

Heating in the winter months: Nestsystems (on the left) vs. Fan Coil Units (on the right)

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28

27

26

25

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0 10 mins 35 mins 50 mins 60 mins

30

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27

26

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Cooling in the summer months: Nestsystems (on the left) vs. Fan Coil Units (on the right)

Perceived temperature °C Actual temperature °C

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Build YOUR system...

Zehnder Nestsystems are suitable for both heating

and cooling rooms, and can be installed in the

ceiling or on the wall.

The main component of the system is the

radiant panel itself, which can then be added to

dehumidification units and / or control systems

which means the Zehnder Nestsystems are as

adaptable as you require them to be to meet your

exact design needs.

Offer 1

Plasterboard radiant panels with hydraulic pump, connectors and tubing

The Zehnder NIC panels uniformly placed on the ceiling or wall create a perfect, naturally comfortable climate. The heat or cooling effect is distributed in a balanced manner over the complete area.

The panels are suitable for both new build and refurbishment projects and are available in three sizes: 1200 x 500 mm, 1200 x 1000 mm and 1200 x 2000 mm.

Each prefabricated sandwich panel consists of:

� 15 mm-thick plasterboard panel

� 27 mm-thick EPS 200 class 1 polystyrene foam panel

� Spiral circuits of PE-Xa O 8 x 1 mm tube with an oxygen barrier to carry the hot or cold water

The circuits are all the same length, with constant hydraulic parameters, and they are connected with each other by the same tube used in the circuits, with a free length of about 60 cm protruding from each panel.

A wide range of pumps and distribution manifolds are available to match your exact hydraulic requirements.

Radiant panel mounted in ceiling

Better still...

Why not let us design your system for you?

Contact us for further information.

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Offer 3


PLUS controls

PLUS dehumidification

The Zehnder Dew dehumidifiers and ducting control the humidity of the rooms at a constant 50-55%. This level avoids condensation to form whilst cooling with Zehnder NEST radiant conditioning systems.

Designed specifically for installation with high-efficiency dual flow heat regenerators, the Zehnder ComfoDew units optimise plant engineering in terms of comfort, energy savings and air quality.

Zehnder Dew 200, 350 and 500 are designed for small to medium-sized residential and commercial properties, whilst the Zehnder Dew 700 is designed for medium to large residential and commercial applications.

Ceiling mounted version of dehumidifier

Offer 2


PLUS controls

The Zehnder Chronosonda Control system automatically determines the optimum water temperature of the system in consideration of internal and external conditions and dew point factors.

The sensors can be installed anywhere: in homes, hotel rooms, offices or hospitals, etc. The sensors measure the delivery water temperature in the system and the external air temperature which are an important and obligatory accessories for managing a radiant conditioning system. For heating-only systems, a control sensor has also been developed to control the room temperature.

Simple, easy-to-understand icons have been used to make setting the parameters and displaying the zone states as user friendly as possible. The 4 buttons and the display allow the user to set the room temperature and relative humidity directly; the system can be switched off, and 5 timer programmes, along with the zone operating mode, frost protection and temperature reduction can be set directly from inside the room.

Zehnder Chronosonda Control system with interface

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Performance

Tests have been independently

carried out by the WSPLab

laboratories in Italy to certify the

thermal output of the Zehnder

Nestsystems radiant panels, in

accordance with the test methods

indicated by current regulations.

Heating outputs are fully tested to

EN 14037.

Cooling outputs are fully tested to

EN 14240.

The ΔT (K) is an average of two

temperatures:

1. The average of delivery and

return temperature, and

2. Room air temperature

Full technical data can be found

on page 16.

Zehnder Nestsystems radiant panels

Zehnder NIC 600

1200 x 2000 mm

Zehnder NIC 300

1200 x 1000 mm

Zehnder NIC 150

1200 x 500 mm

∆T (K) Heating output in Watts (tested to EN 14037)

28 290 144 7227 279 140 7026 268 134 6725 258 129 6424 247 123 6223 236 118 5922 225 113 5621 215 107 5420 204 102 5119 193 97 4818 182 91 4617 172 86 4316 162 81 4015 151 76 3814 140 70 3513 130 65 3312 120 60 3011 109 55 2710 99 49 259 88 44 228 78 39 20

∆T (K) Cooling output in Watts (tested to EN 14240)

5 55 28 146 68 34 177 81 40 208 94 47 249 107 54 2710 120 60 3011 134 67 3412 148 74 3713 161 81 40

Need help with the design...?

Let us design your system for you:

Our in-house team would be more than pleased to help

design your system, without cost, and visit site if required.

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Applications

The principle of radiant heating and cooling can be used in many applications for rooms and buildings.

Zehnder Nestsystems have been used for decades to provide indoor climate solutions for various buildings including residential buildings, retail outlets, offices and public buildings such as schools and hospitals.

For some considerable time they have been an essential component of innovative construction projects.

Offices

� False ceilings, housing the M&E services can be finished with Zehnder panels.

� The interior environment nurtures healthy and productive employees

� Avoids ‘sick building’ syndrome

Hotels

� Acoustic and comfort solutions

� Free spaces, no air movement, no noise and a uniform feeling of wellbeing

� Individual room climates can be controlled from the lobby desk or a remote location

Schools

� Allows safety to be the prime concern: no dangerous corners, edges or exposed surfaces

� Provides a healthy, comfortable and safe environment: perfect for high performance and productivity

Residential � Ideally suited to new building regulations

� Low inertia systems

� No intrusion on the living space

� Quiet, healthy, natural and uniform comfort conditions

Hospitals

� Hygienic solution

� No exposed parts to keep clean

� No parts which present any hazard to the patients

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Technical Specification Data

System overview 14Connection possibilities 17Zehnder NIC panel 18PE-Xa 8 x 1 tube with oxygen barrier 20Multilayer 20 x 2 insulated tube 22Connections 26Distribution manifold 27Ct box Sub units 28Zehnder Chronosonda 32Zehnder control BUS units 34Zehnder Dew dehumidification units 36Zehnder Comfosystems 39

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1 2

5

6

8

9

The System...

NIC panel incorporating PE-Xa 8 x 1 tube with oxygen barrier1 2

5

6

7

Distribution manifold

Pump (Ct box sub-unit)

Room controls / sensors

10

15

3

4

7

3

4

8

9

Insulated 20 x 2 multilayer tube

Quick fix connections

Central control unit

Dehumidification unit

Boiler & Chiller or Heat Recovery unit10

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Zehnder Nestsystems is suitable for both heating and

cooling rooms, and can be installed in the ceiling or on the

wall. In addition to the various set-up options, the radiant

system provides another advantage: when installed in

ceilings, it acts as a finishing and insulating element in the

building work.

The panels are fastened using standard plasterboard

metal profiles positioned to allow the installation of the

linear manifolds connecting the internal circuits of the

panels between panels: The linear manifolds are made of

a multilayer O 20 x 2 mm tube with an oxygen barrier and

come with Zehnder quick-fit connections for the O 8 x 1

mm PE-Xa tubes with oxygen barrier used for the circuits

inside the panels.

The radiant surface is finished in the same way as

standard plasterboard panels (filled and reinforced with

mesh or masking tape over the joints, primed, painted,

spatula finish, etc.).

Zehnder Nestsystems primarily represents a simple,

rational, efficient and economically viable solution for

dry radiant panel heating and cooling for the modern

building trade in the construction of new buildings or

refurbishment.

Zehnder Nestsystems offers both plant engineering

and construction functions, as the panels provide heat

insulation and replace the plaster finish, leaving room for

electrical systems and plumbing.

Zehnder NIC panels are easy to install when refurbishing;

the installation requires no brickwork but only plasterwork

or decoration.

Zehnder Nestsystems notably reduces on-site installation

times and there will be less cleaning to do, with no

chases cut in the walls or finishing required after electrical

installations and plumbing are laid. No bulky traditional

heating or air conditioning units need to be installed

(radiators or fan coils).

Zehnder Nestsystems can be installed on the walls or

ceilings, and requires no hydraulic balancing as the system

is self-balancing. Prior to start-up, the panels are held in

place by normal metal plasterboard profiles screwed onto

the brickwork.

All connections between the circuit and the manifolds

of the linear adduction lines are made with quick-fit

connections, allowing rapid implementation of the lines

supplying the panels. The “linear manifolds” installed near

the panels guarantee the parallel hydraulic connection of

each individual module in order to maintain the pressure

loss constant, regardless of the number of modules

installed. This facilitates the start-up of the installation.

Finally, for an optimal installation depth, all distribution lines

(insulated and preinsulated) remain within the limits of the

panel insulation, requiring a maximum of 69 mm in depth.

The Zehnder NIC panels with quick-fit connections

has a maximum operating pressure of 4 bar (at a liquid

temperature of 40°C).

Zehnder Nestsystems radiant conditioning panels

Zehnder NIC panels installed in the ceiling

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Connection possibilities

1 x Zehnder quick-fit connections (02000118)

6 x Zehnder quick-fit connections (02000118)8 x connections (02000119)







Two 1.2m x 0.5m panels connected in series:1 x Zehnder quick-fit connections (02000118)

Quick connector 8-8mm

Zehnder quick-fit connection (02000118)

FlowReturn

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Zehnder NIC panel

The Zehnder NIC panel is a radiant ceiling and/or wall

mounted prefabricated sandwich panel consisting of a 15

mm thick plasterboard panel and a 27 mm-thick EPS 200

class 1 polystyrene foam panel with a density of 30kg/m3,

housing 1 or 2 spiral circuits of PE-Xa Ø8x1 mm tube with

an oxygen barrier, depending on the model. The position

of the tubes is marked on the outer surface of the panels

to facilitate installation.

The Zehnder NIC panel is available in three fully-integrated

versions. The circuits are all the same length, with

constant hydraulic parameters, and they are connected

with each other by the same tube used in the circuits, with

a free length of about 60 cm protruding from each panel.

ΔT (K) cooling water: 3°C

Cooling output: 60 w/m2 with water at 15°C

ΔT (K) heating water: 5°C

Heating output: 100 w/m2 with water at 40°C

Output certified in accordance with standards EN 14037

and EN 14240.

2000mm 1000mm 500mm

1200

mm

1200

mm

1200

mm

Zehnder NIC 600 Zehnder NIC 150Zehnder NIC 300

Pressure loss

3000

2500

2000

1500

1000

500

0 10 20 30 40 50 60

Flow rate (l/h)

Dp

(mm

H2O

)

Zehnder NIC 150

Zehnder NIC 600 and 300

1

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Zehnder NIC panels

Zehnder NIC 600 Zehnder NIC 300 Zehnder NIC 150

Part no. ModelRadiant panel

dimensions (mm)

Thickness of radiant panel +

Insulation = Total

Dry weight of radiant panel

Number x length of circuits = Total water volume (l)

02000129 Zehnder NIC 600 with PE-Xa tube and EPS insulation

2000 x 1200 mm 15 + 27 = 42 mm 34.4 Kg – 14 Kg/m2 Two x 22 m = 1 litre


1000 x 1200 mm 15 + 27 = 42 mm 17.2 Kg – 14 Kg/m2 One x 22 m = 0.5 litre


500 x 1200 mm 15 + 27 = 42 mm 8.6 Kg – 14 Kg/m2 One x 11 m = 0.3 litre

Part no. Model PackagingMax No. of

panels per pack

Surface area m2

covered by panels in pack


Pallet1300 x 2000 x 1000

25 60


Pallet1300 x 1000 x 1000

25 30


Pallet1300 x 1000 x 1000

50 30

Zehnder NIC EPS finishing panel

Part no. ModelPanel dimensions

(mm)

Thickness of radiant panel +

Insulation = Total

Panel weight(kg - kg/m2)

02000003 NIC EPS finishing panel 2000 x 1200 25 + 27 = 42 34.4 Kg – 14 Kg/m2

Part no. Model PackagingMax No. of

panels per pack

Surface area m2

covered by panels in pack

02000003 NIC EPS finishing panelPallet

1300 x 2000 x 1000 25 60

Zehnder NIC radiant panels are also available, on request, with a wood fibre panel instead of the polystyrene foam panel, for structures built to Green Housing standards.

Monobloc prefabricated dummy panel consisting of a 15 mm thick plasterboard panel and a 27 mm-thick EPS 200 polystyrene foam panel.

This panel is used to finish any gaps or for areas where working radiant panels are not required

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The PE-Xa 8 x 1 tube is used within the NIC panels to

distribute the water through the panels to heat and / or

cool the room.

Construction specifications

� The inner layer made of Pe-Xa (high-density reticulated polyethylene in accordance with method “C” using ß rays) has an extremely smooth surface meaning a drastic reduction in pressure loss compared to the traditional metal tube used in the sanitary and heating sector.

� The outer layer made of EVOH (ethylene-vinyl-alcohol), forms a barrier of a few dozen µm, which makes the tube practically impermeable to oxygen. The amount of oxygen that seeps through the tube in a day at a temperature of 40°C is less than 0.1 grams per cubic metre, meaning a drastic reduction in corrosive problems in heating systems when plastic tubes are used in combination with materials affected by said phenomena.

� The intermediate layer, however, is a very thin layer of polymer (highly adhesive) that bonds the two previous layers together.

Material-related specifications

� Thermal conductivity: 0.35 W/m°K pressure resistance and resistance to stress-cracking:

� Pressure resistance, compliant with standard ISO 9080 (tested by Studsvik Polymer, an internationally acknowledged test laboratory)

� Test temperature: 110°C, 95°C and 20°C

� 10000 hour test passed

The resistance of the material to stress cracking and

pressure at a temperature of 120°C were tested by the

Studsvik laboratory with excellent results.

Oxygen diffusion-related specifications

Oxygen diffusion permeability:

� Oxygen diffusion permeability compliant with DIN 4726/4729 (tested by MPA Nordrhein-Westfalen)

� Requirements: after exposing the tube to suitable heat cycles, oxygen diffusion must be less than 0.1 g/m3 per day at a temperature of 40°C.

� Result: 0.004 g/m3 per day (25 times lower than the required value).

PE-Xa 8 x 1 tube with oxygen barrier

PE-Xa

EVOH

Adhesive

Technical specifications Value Unit of measurement Standard

Degree of reticulation .70 % EN 579, ASTM D 2765

Volumetric mass (density) 0.926 g/cm3 ISO 1183:1987 method D

Coefficient of linear thermal expansion 1.8 x 10-4 K-1 DIN 52328

Thermal conductivity approx. 0.4 W / (m x K) DIN 52612

Softening point approx. 130 °C

Ultimate elongation > 500 % ISO 6259:3 . 1997

Oxygen permeability at 40°C. 0.32 mg / (m2 x d) DIN 4726:3.5

. 0.10 g / (m3 x d) DIN 4726:3.5

Roughness factor 0.0005

* Water for human consumption is understood to mean purified or non-purified drinking water used to prepare food or drinks or for other domestic uses, regardless of the source, whether supplied by a distribution network, in tanks, bottles or other containers; the classification also refers to water used by companies producing, processing, preserving or distributing products or substances for human consumption**

** See the applicable laws in force and the above-mentioned standards and decree for more detailed information.

*** This is the minimum radius measured on the plane of the tube axis at the point of curvature; d refers to the external tube diameter.

2

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Dimensions (mm)

Operating Pressure (bar)

Application class Temperature up to 60°C; product life 50

years

Temperature from 60 to 80°C; product life

50 years

Temperature from 80 to 95°C; product life

10 yearsClass 1 Class 2 Class 3 Class 4

8 x 1 Classification method not used for this diameter 10 6 6

Class** Operating conditions for a product life of 50 years and 100 hours, of which: Field of application

1 *** 49 years at an operating temperature (Toper) of 60°C, 1 year at a max. temperature (Tmax) of 80°C and 100 hours at a malfunction temperature (Tmal) of 95°C

Supply of hot water (60°C)

2 *** 49 years at an operating temperature (TD) of 70°C, 1 year at a max. temperature (Tmax) of 80°C and 100 hours at a malfunction temperature (Tmal) of 95°C

Supply of hot water (70°C)

4

2.5 years at an operating temperature (TD) of 20°C, 20 years at an operating temperature (TD) of 40°C, 25 years at an operating temperature (TD) of 60°C, 2.5 year at a max. temperature (Tmax) of 70°C and 100 hours at a malfunction temperature (Tmal) of 100°C

Floor heating and low-temperature radiators

5

14 years at an operating temperature (TD) of 20°C, 25 years at an operating temperature (TD) of 60°C, 10 years at an operating temperature (TD) of 80°C, 1 years at a max. temperature (Tmax) of 90°C and 100 hours at a malfunction temperature (Tmal) of 100°C

Floor heating and high-temperature radiators

MarkingPE-X EVOH O 8 x 1.0 - SKZ A441 - Application class 1/8 bar, 2/8 bar, 4/10 bar, 5/8 bar oxygen barrier complying with DIN 4726 - XX00X - (--)/(--)/(--) - X.00.0000.00 - 000 m - >I<

Manufacturer’s name and trademark

PE-X EVOH Type “C” reticulated polyethylene with oxygen barrier

Ø 8 x 1.0 External diameter and tube wall thickness

SKZ A441 Certification obtained

Application class Application classes (see the relevant section of this sheet)

Oxygen barrier complying with DIN 4726 The impermeability to oxygen was tested in accordance with standard DIN 4726

XX00X - (--)/(--)/(--) – X.00.0000.00 – 000m – >I< Fraud prevention no., date of production, batch no. and length in metres

Pressure loss of new Nest tube filled with water at room conditions

(T = 293.16 K; P = 1 atm)

The recommended speed range is highlighted in red.

Pre

ssur

e lo

ss P

a/m

(10

Pa/

m =

100

mm

/m H

2O)

Flow rate L/h

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Multilayer 20 x 2 insulated tube

The Multilayer tube is used to transfer water between the panels to the distribution manifold.

The multilayer tube is made of 5 layers bonded solidly together

� an internal PE-HD reticulated PE-Xb layer

� an intermediate aluminium layer

� an external PE-HD layer

� two adhesive layers inserted respectively between the external and intermediate layer and between the intermediate and internal layer.

The multilayer tube can be used in both the residential and industrial sectors with excellent results in radiant heating systems and hot water distribution systems, as well as in heating systems with radiators or fan coils.

In fact, the multilayer tubing combines the reliability and solidity of traditional metal piping with the practical installation of plastic tubing, eliminating the characteristic drawbacks inherent to each of the two types. The main advantages of the Nest system:

Fast installation

� The tube can be bent cold by hand into tight curves without deforming the section

� Light and strong (the aluminium core makes the tubing resistant to foot traffic and accidental shocks)

� The tube remains shaped in the form it was bent into: whole parts of the system can be constructed off-site, such as the offtakes of bathroom fixtures complete with the relevant final connections

Reduced elongation

Thermal dilation is very similar to that of metal piping, in other words approximately 1/4 ÷ 1/8 that of plastic tubing.

Limited pressure loss, resistant to corrosion and chemical agents

The surface of the internal Pe-Xb layer is extremely smooth resulting in a drastic reduction in pressure loss compared to traditional metal piping. Furthermore, this layer means the piping is:

The surface of the internal Pe-Xb layer is extremely smooth resulting in a drastic reduction in pressure loss compared to traditional metal piping. Furthermore, this layer means the piping is:

� Very resistant to acid and base chemical agent attacks

� Free of limescale deposits (reduces the possibility of algae and bacteria formation; maintains fluidodynamic characteristics over time)

� Effective protection of the aluminium core from phenomena of chemical or natural corrosion. Furthermore, the special design of the connections used, isolating the metal core, eliminates the risk of electrochemical corrosion

Soundproofing

For noise that may be produced by turbulence, vibrations, etc.

Impermeability to oxygen

The internal aluminium layer makes the tube completely impermeable to oxygen, gas and steam, preventing:

� the proliferation of algae and bacteria

� corrosion in the circuits

Inner layer impermeable to UV rays

The inner PE-Xb layer is protected by the aluminium layer which prevents the progressive deterioration due to damage caused by exposure to UV rays.

Note: The tube is supplied in packs that protect it during storage. The outer polyethylene layer of the tube should not be exposed to direct sunlight as it is not very resistant to UV rays.

Marking

PE-X EVOH O 8 x 1.0 - SKZ A441 - Application class 1/8 bar, 2/8 bar, 4/10 bar, 5/8 bar

oxygen barrier complying with DIN 4726 - XX00X - (--)/(--)/(--) - X.00.0000.00 - 000 m - >I<

Manufacturer’s name and trademark

PE-X EVOH Type “C” reticulated polyethylene with oxygen barrier

Ø 20 x 1.0 External diameter and tube wall thickness

SKZ A441 Certification obtained

Application class Application classes (see the relevant section of this sheet)

Oxygen barrier complying with DIN 4726 The impermeability to oxygen was tested in accordance with standard DIN 4726

XX00X - (--)/(--)/(--) – X.00.0000.00 – 000m – >I< Fraud prevention no., date of production, batch no. and length in metres

3

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Technical specifications

Fluids carried**In general, all type of fluids are compatible with the material the tube is made of can be carried (see ISO/TR 10358 technical report: Plastics tubes and connections – Combined chemical – resistance classification table).

Dimensions 20 x 2

Thickness of Al layer 0.25

Weight of tube per metre 0.145

* The indications are only provided for quick reference to the product characteristics: there may be other markings different to those in the example. See UNI standard 10954-1 for more information.

** See the applicable laws in force and the above-mentioned standards and decree for more detailed information.

Properties Value Unit of measurement

Max. operating temperature 95 °C

Max. operating pressure 10 bar

Heat transfer coefficient 0.43

Coefficient of linear thermal expansion 0.025

Internal surface roughness of tube 7 ƒÊm

Oxygen diffusion 0 mg/L

Min. manual radius of curvature with tube bender 6 x DU mm

Min. manual radius of curvature with internal tube bending spring 4 x DU mm

Degree of reticulation (check as indicated in UNI 10954-1) 65 %

Resistance to internal pressure (test in accordance with EN 921):

- At 95°C with test pressure P = 20.2 bar .165 hours

- At 95°C with test pressure P = 19.7 bar .1000 hours

Minimum guaranteed resistance to delamination (tensile test in accordance with UNI 10954-1)

.40

Visual and dimensional control of tubeThe check was performed in accordance with UNI 10954-1, using a laser system, and manual spark-tester.

Check for the presence of internal obstructions The product was checked using the company’s in-house control system.

Check for flaws in tube wallDuring the check (performed using the company’s in-house control system), no leaks were found.

Curvature and flaring test Test performed in accordance with UNI 10954-1

Recommendations for storing the productThe tube is supplied in packs that protect it during storage: the outer polyethylene layer of the tube should not be exposed to direct sunlight, as it is not very resistant to UV rays.

Technical specification of the insulation

Insulation thickness mm 6

Thermal conductivity l 0.0369

Resistance to vapour diffusion m 5297

Self-extinguishing Class 1

24

Operating Pressure (bar)

Class** Poper

(bar)

Operating conditions for 50 year use at operating pressure Poper Field of application

1 1049 years at an operating temperature (Toper) of 60°C, 1 year at a max. temperature (Tmax) of 80°C and 100 hours at a malfunction temperature (Tmal) of 95°C

Supply of hot tap water

2 6

25 years at an operating temperature (Toper) of 60°C, 20 years at an operating temperature (Toper) of 40°C, 2.5 years at an operating temperature (Toper) of 20°C, 2.5 years at a max. temperature (Tmax) of 70°C and 100 hours at a malfunction temperature (Tmal) of 100°C

Floor heating and low-temperature radiators

3 6

10 years at an operating temperature (Toper) of 80°C, 25 years at an operating temperature (Toper) of 60°C, 14 years at an operating temperature (Toper) of 20°C, 1 year at a max. temperature (Tmax) of 90°C and 100 hours at a malfunction temperature (Tmal) of 100°C

Heating with high-temperature radiators

Nest is classified in class 1****. Therefore the product can also be used for class 2 and 3 applications.

* This is the minimum radius measured on the plane of the tube axis at the point of curvature; d refers to the external tube diameter.** Classification in applicative classes, in accordance with standard UNI 10954-1 to which we refer for further information.**** The standard indicates that products classified in class 1 can also be used for the uses envisaged in classes 2 and 3.

Delivery l/h

Pre

ssur

e d

rop

daP

a/m

1 d

aPa

= 1

,02

mm

H2O

= =

1 m

bar

Delivery m3/h

1,50 m/s1,25 m/s1,00 m/s0,75 m/s

0,50 m/s

0,25 m/s

3,00 m/s2,50 m/s2,00 m/s

Project temperature °C 10 15 20 30 40 50 60 70 80 90

Pressure loss correction [daPa/m] 1.030 1.000 0.968 0.908 0.859 0.817 0.785 0.763 0.740 0.716

Flow rate correction [L/h] for known power 1.001 1.000 0.999 0.997 0.993 0.989 0.984 0.978 0.972 0.966

Power correction [W] for known flow rate 0.999 1.000 1.001 1.003 1.007 1.011 1.016 1.022 1.029 1.035

Pressure loss in new tubes filled with water at 15°C

The diagram refers to water at a temperature of 15°C.

For other temperatures, the values in the graph should be taken as a reference, calculating the value using factors of correction to allow for the effect of the temperature on the volumetric mass and viscosity of the water.

The correction factors to consider are indicated in the table below:

25

Zehnder NIC panels installed in the wall

26

Connections

Ø 20 - Ø 8 double connection (modular)

Quick-fit connection for O 20 x 2 mm multilayer tube and PE-Xa O 8 x 1 tube.Use two no. 02000119 connecting sleeves to join connections together

The following materials are used: � 6.6 Nylon reinforced with 30% fibreglass; resistant to hydrolysis � Stainless steel � Peroxide EPDM � Self-extinguishing plastic polymer body � Ethylene-propylene elastomer seals

Technical specifications:Operating temperature: 90°C in continuous service max. 120°C peakOperating pressure: 20°C 8 bar 40°C 4 bar 80°C 2 barBurst pressure: > 40 bar

Part no. DescriptionOverall dimensions of

manifold (mm) Number of connections

Ø 20 x 2 mmNumber of connections

Ø 8 x 2 mm

02000118 Double Ø 20 - Ø 8 (connection (modular) 125 x 97 x 37 4 2

Connecting sleeve for serial connection of double connections

20 mm double connecting sleeve to connect 2 distribution connections with a 20 mm and 8 mm outlet (02000118)

Technical specifications:Operating temperature: max. 90°C in continuous service max. 120°C peakOperating pressure: 20°C 8 bar 40°C 4 bar 80°C 2 barBurst pressure: > 40 bar

Part no. Description Overall dimensions of manifold (mm)

02000119 Connecting sleeve for serial connection of double connections 90 x Ø 20

Ø 20 - Ø 20 90° elbow connection

Quick-fit 90° elbow connection for multilayer O 20 x 2 mm tube

The following materials are used: � 6.6 Nylon reinforced with 30% fibreglass; resistant to hydrolysis � Stainless steel � Peroxide EPDM � Self-extinguishing plastic polymer body � Ethylene-propylene elastomer seals

Technical specifications:Max. operating temperature: max. 90°C in continuous service max. 120°C peakMax. operating pressure: 20°C 8 bar 40°C 4 bar 80°C 2 bar

Part no. ModelOverall dimensions of

connection (mm)Tube connection (mm)

02000122 Elbow connection 90° Ø 20 - Ø 20 72 x 72 - Ø 35 Ø 20 x 2

4

27

Distribution manifold

Modular distribution manifold

Modular manifold with an external structure reinforced with 30% fibreglass, amorphous material with optimal temperature resistance (max. 100°C in continuous service), pressure, deformation, minimal dilation and temperature variations.

Complete with a pair of brackets, unions, a pair of manual breathers and drain taps with hose adaptor and non-return valve, flow meters with capacity regulation, and lockshields that can be fitted with thermostats.

Part no. DescriptionNumber of lines

(delivery and return) Ø supply line

connection (mm)Distribution line

connection

05000126 1 ¼” 2- line nylon manifold 2 + 2 1 1/4 '' F Quick-fit









05000135 1 ¼ 11- line nylon manifold 11 + 11 1 1/4 '' F Quick-fit






Distribution manifolds are used for controlling and regulating the flow of hot and / or cold water to the radiant panels.

5

28

Zehnder Ct-Box sub-units

The Zehnder Ct-Box sub-units are pumps which are connected directly to the distribution manifolds.

This range of sub-units has been developed through the experience of numerous installers which has been incorporated into the design of a number of sizes just right for each floor or ceiling-mounted radiant system.

The system is easy to install and pre-packed in order to allow a customised installation with direct connections to the distribution manifolds supplying the radiant elements.

The following tables can be used to quickly find the most suitable central control unit for the room size to be heated/cooled with a floor or ceiling-mounted system. The number of manifold lines installed in a floor system or the number of coils in a ceiling system should also be taken into consideration.

Each Zehnder Ct-Box has on/off valves on both the primary and secondary circuits, a variable or fixed capacity pump, a series of safety devices (thermometers, manometers, delivery sensor, air bleed sensor, etc.) and a mixer valve.

The operating graphs of the pumps used and the electrical specifications of the equipment installed have also been included.

Each Zehnder Ct-Box is ideal for floor or ceiling-mounted heating and cooling systems and is supplied with:

� 2 primary hydraulic compensator delivery/return on/off ball valves

� 2 secondary delivery/return on/off ball valves � 1 system pump � 2 primary hydraulic compensator delivery/return thermometers

� 2 secondary delivery/return thermometers � 1 manometer (0-6 bar) � 1 delivery sensor well � 1 type PT1000 delivery sensor � 1 mixer valve - 0-10 V (optional) � 1 automatic 1” air bleed with non-return valve � Module fixing brackets � Thermal insulation

6

29

Zehnder Ct-Box sub-unit quick selection table

m2 of project

Number of Zehnder ComfoDew dehumidification units installed within the project No. of coils*0 1 2 3 4

30 1835 2040 2345 2650 2955 3260 3565 3870 4175 4480 4785 5090 5395 55100 58105 61110 64115 67120 70125 73130 76135 79140 82145 85150 88155 90160 93165 96170 99175 102180 105185 108190 111195 114200 117205 120210 123215 125220 128225 131230 134235 137240 140245 143250 146255 149260 152265 155270 158275 160280

Zehnd

er Ct-B

ox 1200

Zehnd

er Ct-B

ox

1200

Zehnd

er Ct-B

ox 1200

Zehnd

er Ct-B

ox 2000

Zehnd

er Ct-B

ox 2000

Zehnd

er Ct-B

ox 2000

Zehnd

er Ct-B

ox 2000

Zehnd

er Ct-B

ox 2000

Zehnd

er Ct-B

ox 3000

Zehnd

er Ct-B

ox 3000

Zehnd

er Ct-B

ox 3000

Zehnd

er Ct-B

ox 3000

Zehnd

er Ct-B

ox 3000

Zehnd

er Ct-B

ox 4000

Zehnd

er Ct-B

ox 4000

Zehnd

er Ct-B

ox 4000

Zehnd

er Ct-B

ox 4000

Zehnd

er Ct-B

ox 4000

The table has been drawn up based on the following considerations:

� a Dew dehumidifier bank water flow rate equal to 240 L/h

� a ceiling system with Zehnder NIC 300 panels (1.2 m2 - 25 L/h per coil) and a radiant incidence of 70%.

* NIC 150 and NIC 300 panels have 1 coil; NIC 600 has 2 coils

30

Technical specifications for Zehnder Ct-Box sub-units

Model Zehnder Ct-Box 1200 sub-unit Zehnder Ct-Box 2000 sub-unit Zehnder Ct-Box 3000 sub-unit Zehnder Ct-Box 4000 sub-unit

Flow rate 1200 l/h 2000 l/h 3000 l/h 4000 l/h

Pump model DAB VA 65/180 DAB VA 65/180 DAB VA 56/180 DAB VA 80/180 M

Input 50 Hz 1 x 230 V~ 1 x 230 V~ 1 x 230 V~ 1 x 230 V~

Pitch mm 180 180 180 180

Connections 1” F 1” G 1 1/2” G 1 1/2” G

Min. head pressure t° + 90°C m.w.c.* 2.5 t° + 90°C m.w.c.* 2.5 t° + 90°C m.w.c.* 2.5 t° + 90°C m.w.c.* 2.5

Max. capacity 1.5 m3/h 2 m3/h 3 m3/h 4 m3/h

Max. discharge head 4 m H2O 4.2 m H2O 5.8 m H2O 7 m H2O

Max. press. loss 1.5 m H2O 1.5 m H2O 3.2 m H2O 4.2 m H2O

Mixer valve SAUTER BUN 015 F300 / Kvs 5 m3/h / 1” connections SAUTER BUN 015 F300 / Kvs 4 m3/h / 1” connections SAUTER BUN 020 F300 / Kvs 6.3 m3/h / 1 1/4˝ connections SAUTER BUN 025 F300 / Kvs 10 m3/h / 1 1/2˝ connections

Servomotor SAUTER AXM 117 / 0-10 V / 24 VAC input SAUTER AXM 117 / 0-10 V / 24 VAC input SAUTER AXM 105 S F132 / 0-10 V / 24 VAC input SAUTER AVM 104 S F132 / 0-10 V / 24 VAC input

Primary connections Left side Left side Left side Left side

Secondary connections

Right side Lower side Lower side Lower side

Ove

rall

spac

e re

qui

red

Height 500 mm 500 mm 710 mm 780 mm

Width 600 mm 600 mm 700 mm 770 mm

Depth 130 mm 130 mm 150 mm 150 mm

Dry weight 10.9 kg 10.6 kg 17.1 kg 23 kg

Water volume litres 2 l 2.5 l 5 l 8.3 l

Ball valves 1" 1" 1" 1"

Thermometers 0 - 60°C 0 - 60°C 0 - 60°C 0 - 60°C

Manometer 0 - 6 bar 0 - 6 bar 0 - 6 bar 0 - 6 bar

Max. pressure 6 bar 6 bar 6 bar 6 bar

* m.w.c. = meters of water column

31

Technical specifications for Zehnder Ct-Box sub-units

Model Zehnder Ct-Box 1200 sub-unit Zehnder Ct-Box 2000 sub-unit Zehnder Ct-Box 3000 sub-unit Zehnder Ct-Box 4000 sub-unit

Flow rate 1200 l/h 2000 l/h 3000 l/h 4000 l/h

Pump model DAB VA 65/180 DAB VA 65/180 DAB VA 56/180 DAB VA 80/180 M

Input 50 Hz 1 x 230 V~ 1 x 230 V~ 1 x 230 V~ 1 x 230 V~

Pitch mm 180 180 180 180

Connections 1” F 1” G 1 1/2” G 1 1/2” G

Min. head pressure t° + 90°C m.w.c.* 2.5 t° + 90°C m.w.c.* 2.5 t° + 90°C m.w.c.* 2.5 t° + 90°C m.w.c.* 2.5

Max. capacity 1.5 m3/h 2 m3/h 3 m3/h 4 m3/h

Max. discharge head 4 m H2O 4.2 m H2O 5.8 m H2O 7 m H2O

Max. press. loss 1.5 m H2O 1.5 m H2O 3.2 m H2O 4.2 m H2O

Mixer valve SAUTER BUN 015 F300 / Kvs 5 m3/h / 1” connections SAUTER BUN 015 F300 / Kvs 4 m3/h / 1” connections SAUTER BUN 020 F300 / Kvs 6.3 m3/h / 1 1/4˝ connections SAUTER BUN 025 F300 / Kvs 10 m3/h / 1 1/2˝ connections

Servomotor SAUTER AXM 117 / 0-10 V / 24 VAC input SAUTER AXM 117 / 0-10 V / 24 VAC input SAUTER AXM 105 S F132 / 0-10 V / 24 VAC input SAUTER AVM 104 S F132 / 0-10 V / 24 VAC input

Primary connections Left side Left side Left side Left side

Secondary connections

Right side Lower side Lower side Lower side

Ove

rall

spac

e re

qui

red

Height 500 mm 500 mm 710 mm 780 mm

Width 600 mm 600 mm 700 mm 770 mm

Depth 130 mm 130 mm 150 mm 150 mm

Dry weight 10.9 kg 10.6 kg 17.1 kg 23 kg

Water volume litres 2 l 2.5 l 5 l 8.3 l

Ball valves 1" 1" 1" 1"

Thermometers 0 - 60°C 0 - 60°C 0 - 60°C 0 - 60°C

Manometer 0 - 6 bar 0 - 6 bar 0 - 6 bar 0 - 6 bar

Max. pressure 6 bar 6 bar 6 bar 6 bar

* m.w.c. = meters of water column

32

Zehnder Chronosonda

Zehnder has designed and built these unique room controls and sensors to measure temperature and humidity. The result is an essential instrument for managing radiant systems where the room temperature and humidity must be measured to calculate the dew point.

With the end user in mind, simple, easy-to-understand icons have been used to make setting the parameters and displaying the zone states as user-friendly as possible.

The 4 buttons and the display allow the user to set the room temperature and relative humidity directly; the system can be switched off, and 5 timer programmes, along with the zone operating mode, frost protection and temperature reduction can be set directly from inside the room.

The room controls are particularly easy to install and connect. They can be installed anywhere in homes, hotel rooms, offices or hospitals, etc.

Dimensions: H89 x W130 x D46mm

Functional characteristics: � Backlit LCD display � 4 buttons � Room temperature display � Room humidity display � Room temperature settings � 5 general timer programmes � Timer function programme selection � Zone On/Off � Manual/timer prog. temperature function � Manual/timer prog. dehumidifier function (CFTH BUS model)

� Temperature reduction for maintenance (CFTH model)

� Temperature set limits (e.g.: +/- 3°C) � Full keypad lock � Menu lock � Dew point calculation (CFTH model) � Built-in relay for dehumidifier control (CFTH model) � Built-in relay for temperature control (CFTH model)

7

Zehnder Chronosonda and Zehnder control BUS unit provide a complete centrally controlled system.

33

Zehnder room controls

Zehnder CFTHStand alone unit for independent control of each zone

Zehnder CFTH BUSUnits for multiple zones and controlled centrally

The Zehnder CFTH controller, for effective handling of heating and cooling in winter and summer, as well as for dehumidification. The temperature can be managed by a timer programme with reduction periods, or in manual mode. The Zehnder CFTH is the best solution for managing your radiant cooling system, thanks to the continuous dew point calculation and the dehumidifier control based on absolute humidity.

It is equipped with a backlit display to guarantee visibility even in difficult conditions. Installation is fast and easy thanks to the compact dimensions of the unit, which can be installed in standard electrical boxes. The user can set a variety of parameters using the 4 buttons and the display.

The Zehnder CFTH BUS control sensor measures the temperature and relative humidity in the room where it is installed. The control sensor has a display and buttons so the user can set the desired temperature and the functional mode for the zone and its dehumidifier.

The room control sensor calculates the dew point on the basis of the temperature and humidity in the room and then controls the electrothermal actuator heads and the dehumidifier to guarantee the desired conditions of comfort while preventing condensation.

Technical specifications:

� The Zehnder CFTH BUS control sensor is designed to function only with Zehnder Control BUS 10-1w or 90-4 regulators (see section 8 )

� The sensor must be powered with 12 VAC (alternating current)

� The room sensors and dehumidifiers can be connected to the electronic regulator using an RS-485 bus communications cable

� Type “503” box

� Sensor standard colour: White RAL 9010

34

Zehnder Control BUS units

The central control unit is the efficient heart of the Zehnder comfort project. The system gives you continuous control over the dew point thanks to a series of CFTH BUS sensors (see section 7 ) reading the room temperature and humidity. The control unit regulates the water delivery temperature on the basis of the readings, so the surface temperature of the radiant system remains above the critical level.

The control unit coordinates and monitors various devices in the system, allowing you to manage:

� the temperatures in the various zones

� the humidity levels in the various zones

� the dehumidifiers

� the chillers/heat pumps

� the heat regenerators

� the mixer valve

� the system pumps

� the boiler

� the controls and safety devices

� the delivery temperature readings

The monitoring produces a graphic representation of the whole system, and all the system variables can be managed. Monitoring may be done using a local network or from a remote station with an Internet connection via modem. The control sensors in each room are connected directly to the heart of the system, providing full user interaction to set the temperature, humidity and timer directly from the control sensor.

Up to 90 zones can be controlled thanks to the room sensors connected to the central control unit.

Use the table below to select which central control unit best suits the projects requirements.

8

Characteristics of the Zehnder Control BUS 10-1 and 90-4 units

Controllable by the central control unit Zehnder Control 10-1 Zehnder Control 90-4

No. of zones Max 10 Max 90

No. of dehumidifiers Max 3 Max 50

No. of mixed lines 1 Max 4

Delivery sensor 1 Max 4

External sensor 1 1

Low temp. pump Yes Yes

Monitoring - Yes

Remote touch screen - Yes

High temp. pump Yes Yes

Machine pump (not misc.) - Yes

Boiler Yes Yes

Chiller Yes Yes

Heat pump Yes Yes

HP – Boiler sequence Yes Yes

HP – Boiler integration Yes Yes

Winter climate curve (only if external sensor is installed) Yes Yes

Summer climate curve - Yes

Dew point Yes Yes

35

Zone 1 Zone 5, etc.

Zone 4

Zone 3

Zone 2

Zehnder central control units

Zehnder Control BUS 10-1 Zehnder Control BUS 90-4

The pre-wired electrical board is supplied with the following components:

� 220 V disconnecting switch - (S2.1)

� 220 V - 12 VAC - 24 VAC transformer - ()

� 220 V fuse holder - (F2.1)

� 24 VAC fuse holder - (F2.2)

� 12 VDC fuse holder - (F2.3)

� Pump command relay

� Low-temperature pump protection fuse - (F 8.1)

Cover box also available


The pre-wired electrical board is supplied with the following components:

� 220 V disconnecting switch - (S2.1) � 220 V - 12 VAC - 24 VAC transformer - () � 220 V - 24 VDC power pack � 220 V fuse holder - (F2.1) � 24 VAC fuse holder - (F2.2) � 12 VDC fuse holder - (F2.3) � 24 VAC fuse holder - (F2.4) � Summer/winter pump command relay � Line 1 low-temperature pump protection fuse - (F 8.1) � Line 2 low-temperature pump protection fuse - (F 8.2) � Line 3 low-temperature pump protection fuse - (F 8.3) � Line 4 low-temperature pump protection fuse - (F 8.4) � High-temperature pump protection fuse - (F 8.5) � Machine line pump protection fuse - (F 8.6)

Cover box also available


36

Zehnder Dew dehumidification units

Zehnder Dew dehumidifiers have been designed, built and optimised for installation in ceiling, wall and floor radiant conditioning systems controlled by Zehnder Control units.

For use with boilers and chillers, Zehnder Dew 200, 350 and 500 dehumidifiers are dimensioned to dehumidify the home or work environment in general: small and medium-sized storerooms and offices.

The Zehnder Dew 200, Zehnder Dew 350 and Zehnder Dew 500 are designed for installation in ceilings. The use of dedicated ducting for air distribution is intended.

For use with heat pumps, Zehnder has designed and built the Zehnder ComfoDew 200, Zehnder ComfoDew 350 and Zehnder ComfoDew 500 dehumidifier range specifically for installation with high-efficiency dual flow heat regenerators. This optimises plant

engineering in terms of comfort, energy savings and air quality. Ventilation ducting is used to control the level of humidity in all rooms, guaranteeing maximum performance of the radiant system.

Specific accessories, the Zehnder Plenum, make coupling and connecting the dehumidifiers to the heat pump easy.

The Zehnder Dew 700 dehumidifier is specifically designed for medium-large residential applications, shops and the tertiary sector. It is not suitable for industrial applications

9

VISTA POSTERIORE Zehnder Dew 700 VISTA LATERALE LATO ATTACCHI Zehnder Dew 700

VISTA IN PIANTA Zehnder Dew 700VISTA ASSONOMETRICA Zehnder Dew 700

Zehnder Dew 200

Zehnder ComfoDew 200

Zehnder Dew 350


Zehnder Dew 500


Zehnder Dew 700







245m

m

705mm

334m

m

286m

m

262m

m

726mm796mm 880mm

614mm665mm613mm550mm

37

Technical specifications for Zehnder Dew and Zehnder ComfoDew dehumidification units

ModelZehnder Dew 200

ComfoDew 200

Zehnder Dew 350

ComfoDew 350

Zehnder Dew 500

ComfoDew 500


Approximate max. air volume processed [m3]

200 350 500 150

No. of persons in room 4 - 6 10 15 3 - 4

Condensation capacity (at 25°C – 65% R.H.) [L/day]

24 38.3 60.1 19

Operating temperature limits [°C] 18°C / +32 18°C / +32 18°C / +32 18°C / +35

Relative humidity [% R.H] 50/85 50/85 50/85 50/85

Air flow [m3/h] 200 350 500 150

Lift /drop pressure at nominal flow rate [Pa]

60/50 60/50 60/50 50

Bank water flow rate [L/h] ≥ 240 ≥ 350 ≥ 500 ≥ 180

Bank pressure loss [kPa] 15.68 - 32.93 12 16 15

Thermal power absorb. of isothermal dehumidification ** [W]

1235 1800 2745 1060

Thermal power absorb of banks on dehumidification and integration ** [W]

1710 2500 3995 1555

R134a refrigerant gas charge [g] 230 580 680 190

Max. refrigerant pressure [bar] 14 14 14 14

Ele

ctri

cal

spec

ifica

tio

ns Input voltage [V] 230 V, 50 Hz 230 V, 50 Hz 230 V, 50 Hz 230 V, 50 Hz

Current consumption [A] 1.9 1.3 2.1 1.9 2.7 1.16

Power consumption [W] 300 265 460 400 550 240

Noise level [dB(A)] < 40 < 40 < 40 < 40

Dim

ensi

ons Height 245 mm 262 mm 286 mm 267 mm

Width 705 mm 726 mm 796 mm 670 mm

Depth 550 mm 613 mm 665 mm 564 mm

Weight [kg] 32 32 54.2 30

All the dehumidifiers are designed to be installed at ceiling horizontally or in a false ceiling and cannot be installed outdoors.

** Note: 26°C and 84% - Water temp. 15°C

Each Zehnder dehumidification unit has the following features:

� Pre-processing heat exchanger battery, finned copper pipe evaporator, water cooled condenser, post-processing water heating heat exchanger

battery, all with hydrophilic treatment

� Galvanised sheet steel frame

� Electrical board with Phase-Neutral connection enabled by Zehnder Control

� 1” F connections for connecting adduction lines to radiant panel plant manifold

� Centrifugal fan (4 selectable speeds)

� Alternating air-tight R134a compressor

� Compressor compartment soundproofed with polyethylene foam sheet and lead

� Condensate drain with 14 mm hose connection

� Stainless steel condensate tray

Note: The Zehnder ComfoDew models do not have the centrifugal fan

For full technical specifications please contact the sales office.

38

Plenum for Zehnder ComfoDew dehumidifiers

Plenum made of insulated, galvanised sheet steel to use with Zehnder ComfoDew dehumidifiers with circular connection for connecting to heat recovery / heat pump unit.

Part no. Description

06000096 Zehnder ComfoDew 200 DN 125 Plenum






Need help with the design...?

Let us design your system for you:

Our in-house team would be more than pleased to help

design your system, without cost, and visit site if required.

39

Zehnder Comfosystems10Zehnder Nestsystems happily work alongside a traditional boiler and chiller unit in addition Zehnder Nestsystems also works perfectly with alternative energy sources particularly air or ground source heat pumps and heat recovery and ventilation units.

At Zehnder, we are able to provide a full heat recovery and ventilation solution including the heat recovery unit, the ducting and grilles, the controllers and a ground source heat exchanger or enhanced cooling option which fit together logically and easily.

Zehnder has a comprehensive range of products which can be tailored to meet the requirements of a broad spectrum of dwellings from smart, urban apartments to large, luxury dwellings.

Please contact us for further details or visit the website

www.zehnder.co.uk/comfosystems

Zehnder CA160 Zehnder CA200 Zehnder CA350 Zehnder CA550

40Zehnder – always around you

Fresh Air – a product range with a long tradition at Zehnder. Zehnder Comfosystems provides products and solutions for comfortable indoor ventilation with heat recovery for houses and apartments, for new builds and for renovation projects.

■ Comfortable indoor ventilation

■ Compact energy station with integrated ventilation unit

Zehnder Clean Air Solutions provide Clean Air in buildings particularly prone to dust. In residential applications, the comfortable indoor ventilation provided by Zehnder Comfosystems filters external pollutants out of the air.

■ Comfortable indoor ventilation with integrated fresh-air filter

■ Compact energy unit with integrated fresh-air filter

■ Systems for clean air

At Zehnder, heating doesn’t just come in the form of designer radia-tors. We offer solutions in all shapes and sizes, from radiant ceiling panels to heat pumps with integrated venti-lation unit.

■ Designer radiators

■ Compact energy station with integrated heat pump

■ Heating and cooling ceiling systems

■ Comfortable indoor ventilation with heat recovery

■ Radiant ceiling systems

Zehnder also offers sophisti-cated solutions for indoor cooling. These range from cooling ceiling systems to comfortable indoor ventilation with a supply of pre-cooled fresh air.


■ Compact energy station with heat pump and brine pipe

■ Comfortable indoor ventilation with geothermal heat exchanger for fresh air pre-tempering


Heating, cooling, fresh and clean air: at Zehnder, you will find everything you need to create a comfortable, healthy and energy-efficient indoor climate. Zehnder’s wide and clearly structured portfolio can offer the right product for any project, be it private, public or commercial, new build or refurbishment. And where service is concerned, you’ll find that Zehnder is “always around you”.

Zehnder – everything you need to create a comfortable, healthy and energy-efficient indoor climate

Zehnder ComfosystemsZehnder designer radiators, Zehnder Nestsystems

Zehnder heating and cooling ceiling systems, Zehnder Nestsystems Zehnder Clean Air Solutions

Heating

Cooling

Fresh Air

Clean Air

Most innovative brand in the category heating & climate

Z_MASTER_V0513_ALL_CrossSelling_en.indd 3-4 30.08.2013 11:05:00

41Zehnder – always around you

Fresh Air – a product range with a long tradition at Zehnder. Zehnder Comfosystems provides products and solutions for comfortable indoor ventilation with heat recovery for houses and apartments, for new builds and for renovation projects.

■ Comfortable indoor ventilation

■ Compact energy station with integrated ventilation unit

Zehnder Clean Air Solutions provide Clean Air in buildings particularly prone to dust. In residential applications, the comfortable indoor ventilation provided by Zehnder Comfosystems filters external pollutants out of the air.

■ Comfortable indoor ventilation with integrated fresh-air filter

■ Compact energy unit with integrated fresh-air filter

■ Systems for clean air

At Zehnder, heating doesn’t just come in the form of designer radia-tors. We offer solutions in all shapes and sizes, from radiant ceiling panels to heat pumps with integrated venti-lation unit.

■ Designer radiators

■ Compact energy station with integrated heat pump


■ Comfortable indoor ventilation with heat recovery


Zehnder also offers sophisti-cated solutions for indoor cooling. These range from cooling ceiling systems to comfortable indoor ventilation with a supply of pre-cooled fresh air.


■ Compact energy station with heat pump and brine pipe

■ Comfortable indoor ventilation with geothermal heat exchanger for fresh air pre-tempering


Heating, cooling, fresh and clean air: at Zehnder, you will find everything you need to create a comfortable, healthy and energy-efficient indoor climate. Zehnder’s wide and clearly structured portfolio can offer the right product for any project, be it private, public or commercial, new build or refurbishment. And where service is concerned, you’ll find that Zehnder is “always around you”.

Zehnder – everything you need to create a comfortable, healthy and energy-efficient indoor climate

Zehnder ComfosystemsZehnder designer radiators, Zehnder Nestsystems

Zehnder heating and cooling ceiling systems, Zehnder Nestsystems Zehnder Clean Air Solutions

Heating

Cooling

Fresh Air

Clean Air

Most innovative brand in the category heating & climate

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From concept to actualisation...

Featured product: Zehnder Terraline

...with Zehnder BIM components

Download free of charge at www.zehnder.co.uk/bim

Zehnder (commercial) · Unit 4 Watchmoor Point · Camberley · Surrey · GU15 3AD

T +44 (0) 1276 605800 · F +44 (0) 1276 605801 · [email protected] · www.zehnder.co.uk

Zehnder (commercial) is a division of Zehnder Group UK Ltd · Registered in England 2296696

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