Luft/Wasser-Wärmetauscher Air/water heat exchangers

Luft/Wasser-Wärmetauscher Air/water heat exchangers
Luft/Wasser-Wärmetauscher
Air/water heat exchangers
Echangeurs thermiques air/eau
Lucht/water-warmtewisselaars
Luft/vatten värmeväxlare
Scambiatori di calore aria/acqua
Intercambiadores de calor aire/agua
SK 3378.XXX
Montage-, Installations- und Bedienungsanleitung
Assembly and operating instructions
Notice d’emploi, d’installation et de montage
Montage- en bedieningshandleiding
Montage- och hanteringsanvisning
Istruzioni di montaggio e funzionamento
Instrucciones de montaje y funcionamiento
Contents
EN
1 Notes on documentation. . . . . . . . . . 3
1.1
1.2
1.3
1.4
Associated documents . . . . . . . . . . . . . . . .
CE labelling . . . . . . . . . . . . . . . . . . . . . . . . .
Retention of documents . . . . . . . . . . . . . . .
Symbols used. . . . . . . . . . . . . . . . . . . . . . . .
3
3
3
3
2 Safety notes . . . . . . . . . . . . . . . . . . . . 3
3 Device description . . . . . . . . . . . . . . . 4
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.2
3.3
Functional description . . . . . . . . . . . . . . . .
How it works. . . . . . . . . . . . . . . . . . . . . . . . . .
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety equipment . . . . . . . . . . . . . . . . . . . . . .
Condensation. . . . . . . . . . . . . . . . . . . . . . . . .
Leak detection . . . . . . . . . . . . . . . . . . . . . . . .
Proper use . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of supply . . . . . . . . . . . . . . . . . . . . . .
4
4
4
4
5
5
5
5
4 Assembly and connection . . . . . . . . 5
4.1
4.2
4.2.1
4.2.2
4.3
4.4
4.5
4.5.1
4.5.2
4.6
4.6.1
4.6.2
4.6.3
4.6.4
2
Choosing the installation site . . . . . . . . . . . 5
Assembly instructions . . . . . . . . . . . . . . . . 5
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Layout of the components in the enclosure. . 6
Assembling air/water heat exchangers . . . 6
Connecting the condensate discharge . . . 7
Connecting the water connection . . . . . . . 8
Notes on water quality . . . . . . . . . . . . . . . . . . 8
Preparation and maintenance of the water
in recooling systems . . . . . . . . . . . . . . . . . . . 9
Notes on electrical installation . . . . . . . . . . 9
Connection data . . . . . . . . . . . . . . . . . . . . . . 9
Overvoltage protection and
supply line load . . . . . . . . . . . . . . . . . . . . . . . 9
Potential equalisation . . . . . . . . . . . . . . . . . . 10
Installing the power supply . . . . . . . . . . . . . 10
5 Commissioning . . . . . . . . . . . . . . . . 11
6 Operation . . . . . . . . . . . . . . . . . . . . . 11
6.1
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.1.7
Control using the Basic controller . . . . .
Display and system analysis. . . . . . . . . . . .
Properties . . . . . . . . . . . . . . . . . . . . . . . . . .
General programming information . . . . . . .
Operation of the basic controller. . . . . . . . .
Setting the temperature. . . . . . . . . . . . . . . .
Setting of system messages . . . . . . . . . . . .
Programming and control of
the Basic controller . . . . . . . . . . . . . . . . . . .
6.2
Reset r6 and r7
(min./max. internal temperature) . . . . . . .
6.2.1 System message contact (K1; floating) . . .
6.2.2 Programming overview of Basic controller . .
11
11
11
11
11
11
11
12
12
12
13
7 Inspection and maintenance. . . . . . 14
7.1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.1.1 Fan replacement . . . . . . . . . . . . . . . . . . . . . 14
8 Storage and disposal. . . . . . . . . . . . 15
9 Technical specifications . . . . . . . . . 15
10 List of spare parts . . . . . . . . . . . . . . 16
11 Further technical information . . . . . 16
11.1 Hydrological data . . . . . . . . . . . . . . . . . . . 16
11.2 Characteristic curves . . . . . . . . . . . . . . . . 17
11.2.1 Water resistance . . . . . . . . . . . . . . . . . . . . . 17
12 Dimensions. . . . . . . . . . . . . . . . . . . . 18
13 Application example:
Parallel connection of
4 air/water heat exchangers . . . . . . 19
Rittal air/water heat exchanger assembly instructions
1 Notes on documentation
1
Notes on documentation
These assembly instructions are aimed at skilled
persons who are familiar with assembly and installation of the air/water heat exchanger, and are trained
specialists who are familiar with the operation of the
air/water heat exchanger.
1.1 Associated documents
There is one set of instructions for the unit types
described here:
– Assembly, installation and operating instructions
enclosed with the unit as a printed document
and/or CD-ROM.
We cannot accept any liability for damage associated with failure to observe these instructions. Where
applicable, the instructions for any accessories used
also apply.
1.2 CE labelling
The declaration of conformity is supplied with the unit
as a separate document.
1.3 Retention of documents
These instructions and all associated documents
constitute an integral part of the product. They must
be given to the plant operator. The operator is
responsible for storage of the documents so they
are readily available when needed.
1.4 Symbols used
Please observe the following safety instructions and
other notes in this guide:
Symbol identifying required actions:
䡲 The bullet point indicates an action to be performed.
Safety and other notes:
2
Safety notes
Please observe the following general safety notes
when assembling and operating the unit:
– Assembly, installation and servicing may only be
performed by properly trained specialists.
– The minimum water inlet temperature of +7 °C
must not be reduced at any point in the water
cycle.
– Use antifreeze agents only with the manufacturer’s
consent.
– Do not obstruct the air inlet and air outlet of the
air/water heat exchanger inside the enclosure
(see also section 4.2.2).
– The heat loss of the components installed in the
enclosure must not exceed the specific useful
cooling output of the air/water heat exchanger.
– The air/water heat exchanger must always be
transported in a vertical position.
– Use only original spare parts and accessories.
– Do not make any changes to the air/water heat
exchanger other than those described in these
instructions or associated instructions.
– The mains connector of the air/water heat exchanger must only be connected and disconnected
with the system de-energised. Connect the prefuse specified on the rating plate.
– Always disconnect the unit from the supply voltage
before servicing or maintenance work.
– Readily flammable objects/materials must not be
stored in the immediate vicinity of the air/water heat
exchanger.
Danger!
Immediate danger to life and limb!
Caution!
Potential threat to the product and its
environment.
Note:
Useful information and special features.
Rittal air/water heat exchanger assembly instructions
3
EN
3 Device description
3
EN
Device description
Depending on the model chosen, your air/water heat
exchanger may vary in appearance from the illustrations contained in these instructions.
However, the functions are identical in principle.
2
The air/water heat exchanger is integrated into a
TS 8 frame and can be incorporated flexibly into a
TS 8 baying system (to either side or between two
TS 8 enclosures), see “4.3 Assembling air/water heat
exchangers”, page 6, fig. 5.
3.1.1 How it works
The air/water heat exchanger comprises three main
components (see fig. 2): Heat exchanger package
(1), fan (2) and the magnetic valve (3) connected
with each other using pipes.
1
3
Fan (2)
4
Temperature
control
Heat
exchanger
(1)
5
Magnetic
valve (3)
Non-return
valve
Cooling water return
Cooling water inlet
6
Fig. 2:
7
12
8
11
9
10
Fig. 1:
Key
1
2
3
4
5
6
7
8
9
10
11
12
13
13
Device description
Water outlet, top
Water inlet, top
Fan
Display
Terminal strip X1, right and left inside of enclosure
Magnetic valve
Condensate discharge
Switching valves (see also fig. 11 and 12)
Water inlet, bottom
Non-return valve
Water outlet, bottom
Baying bracket
Dispatch bag
3.1 Functional description
Air/water heat exchangers are designed and built
to dissipate heat from enclosures by cooling the air
inside the enclosure and so protect the temperaturesensitive components. Air/water heat exchangers are
particularly appropriate for the temperature range of
+5 °C to +70 °C where comparable units, such as air/
air heat exchangers, enclosure cooling units or fanand-filter fans, cannot be used for system reasons to
effectively and economically dissipate heat loss.
4
Air/water heat exchanger
The heat loss of the enclosure is dissipated in a
membrane heat exchanger to the water coolant.
A fan (2) blows the internal enclosure air over the
heat exchanger (1); except for the inlet and outlet
water and the condensed water discharge, the unit
is closed to the environment.
The magnetic valve (3) controls the cooling output by
changing the water flow volume depending on the
required target temperature and the water inlet temperature.
3.1.2 Control
This air/water heat exchanger is equipped with a
basic controller for setting the functions of the heat
exchanger. For display reading and extended functions, please refer to chapter “6 Operation”, page 11.
3.1.3 Safety equipment
– To protect against overcurrent and overtemperature, the fan is equipped with a thermal winding
protection.
– The device has one integral floating contact on
the terminal block (system message relay with
changeover contact, terminals 3 – 5), which may
be used to alert the user in the event of a fault,
e.g. via PLC.
– Air/water heat exchangers possess a leakage
sensor as condensate warning.
Rittal air/water heat exchanger assembly instructions
4 Assembly and connection
3.1.4 Condensation
At high levels of humidity and low cooling water
temperatures inside the enclosure, condensation
may form on the heat exchanger.
Any condensation that forms on the heat exchanger
(with high humidity and low water temperatures) is
routed to the front out of the unit via a drain opening
in the heat exchanger tray. For this purpose, a hose
must be connected to the condensate nozzle
(see “4.4 Connecting the condensate discharge”,
page 7). The condensate must be able to run off
freely. The hose used for draining off condensate
must be laid free from kinks and checked for correct
drainage. Condensate hoses are available as accessories (refer also to the accessories section in the
Rittal Catalogue).
3.1.5 Leak detection
If a leakage or pipe breakage occurs in the water
circuit of the air/water heat exchanger, a magnetic
valve immediately stops the cooling water supply,
the floating change-over contact activated and the
fan switched off. The warning “IA” appears on the
display and alternates with the enclosure internal
temperature.
3.2 Proper use
Rittal enclosure air/water heat exchangers were
developed and designed in accordance with the
state-of-the-art and the recognised rules governing
technical safety. Nevertheless, if used improperly,
they may pose a threat to life and limb or cause
damage to property. The unit is only intended for
cooling enclosures. Any other use is deemed
improper. The manufacturer will not be liable for
any damages caused as a result of improper use,
or for incorrect assembly, installation or use. All risk is
borne solely by the user. Proper usage also includes
the observation of all valid documents and compliance with the inspection and servicing conditions.
4
Assembly and connection
EN
4.1 Choosing the installation site
When choosing the installation site for the enclosure,
please observe the following:
– The air/water heat exchanger must be installed
and operated in a vertical position.
– The ambient temperature must not exceed +70 °C.
– It must be possible to fit a condensate discharge
(see “4.4 Connecting the condensate discharge”,
page 7).
– It must be possible to fit a cooling water supply and
return (see “4.5 Connecting the water connection”,
page 8).
– The mains connection data as stated on the rating
plate of the unit must be guaranteed.
– Clearance of at least 1 m must be left in front of the
door to guarantee convenient access in case of
servicing.
4.2 Assembly instructions
4.2.1 General
– Check the packaging carefully for signs of damage.
Packaging damage may be the cause of a subsequent functional failure.
– The enclosure must be sealed on all sides (IP 54).
Increased condensation will occur if the enclosure
is not airtight.
– The air inlet and outlet must not be obstructed on
the inside of the enclosure.
3.3 Scope of supply
The unit is supplied in a packaging unit in a fully
assembled state.
Please check the delivery for completeness:
Qty.
Description
1
Air/water heat exchanger
1
1
1
1
Dispatch bag:
– Sealing tape for horizontal separation
– Plug-in terminal strip
– Assembly material for baying bracket
TS/TS
– Assembly, installation and operating
instructions
– Corner seals
– Declaration of conformity
1
4
1
Tab. 1: Scope of supply
Rittal air/water heat exchanger assembly instructions
5
4 Assembly and connection
4.2.2 Layout of the components in the enclosure
EN
Caution!
Risk of condensation!
When arranging the components inside
the enclosure, please ensure that the
cold airflow from the air/water heat exchanger is not directed at active components. Please also ensure that the cold
airflow is not directed at the warm exhaust airflow from active components
such as converters. This may lead to an
air short-circuit and therefore prevent
adequate climate control, or may even
cause the air/water heat exchanger’s
internal safety devices to cease cooling
operation.
Fig. 4:
Targeted air routing inside the enclosure
4.3 Assembling air/water heat exchangers
Fig. 3:
Never direct the cold airflow at active components
Exercise particular caution with the airflow from
the blowers of built-in electronic components
(see fig. 3).
The air/water heat exchanger enclosure can be
placed either within or to the right or left of an existing
TS 8 enclosure suite (observe TS 8 dimensions!).
Caution!
To ensure dependable baying, always
use the installation accessories included
in the scope of supply (baying brackets).
After baying, stick the four corner seals
included in the supply onto the baying
brackets.
Note:
The air/water heat exchangers should never
be fitted directly next to the mounting plate. If
such installation is unavoidable, appropriate
measures must be taken to optimise the air
routing.
Note:
It is important to ensure even air circulation
inside the enclosure. Under no circumstances should air inlet and outlet openings be
obstructed, otherwise the cooling performance of the unit will be reduced.
Ensure a suitable distance from electronic
components and other installed enclosures
so that the required air circulation is not
obstructed and prevented.
Fig. 5:
6
Baying brackets
Rittal air/water heat exchanger assembly instructions
4 Assembly and connection
EN
20° C
20° C
1
20° C
2
3
= warm
= cold
1
If the air/water heat exchanger is placed to the left or right of the enclosures to be cooled, the
horizontal sealing tape included in the scope of supply must be used to prevent air short-circuits.
2
In case of installation within an enclosure suite, it is not necessary to seal the air/water heat
exchanger to the left or right.
3
If the air/water heat exchanger is placed between two TS 8 enclosures, but cooling is only
required on one side, the air inlet and outlet openings can be closed with optional metal covers.
Fig. 6:
Baying options
Note:
The enclosure must be sealed on all sides.
In particular, in the area of the cable inlet
openings and the enclosure base.
The condensate discharge
– must be laid with a suitable and constant gradient
(no siphoning)
– must be laid without kinks
– must not have a reduced cross-section if extended
The condensate hose (SK 3301.612), condensate
collecting bottle (SK 3301.600) and external condensate evaporator (SK 3301.560) are available as
accessories (see also Accessories in the Rittal
Catalogue).
Sealing tape
Fig. 7:
Sealing when baying
4.4 Connecting the condensate discharge
(1/
A flexible condensate hose, dia. 12 mm 2˝), can be
fitted to the air/water heat exchanger to drain any
condensate into a collecting bottle.
Rittal air/water heat exchanger assembly instructions
Fig. 8:
Connecting the condensate discharge
䡲 Connect a suitable hose to the condensate nozzle
(at the bottom of the door) and secure it with a hose
clip (with 2 Nm torque).
䡲 Lay the condensate hose, e.g. into a drain.
7
4 Assembly and connection
4.5 Connecting the water connection
EN
A PA hose for both the supply and the return can be
fitted to the air/water heat exchanger. The water connections (3/4˝ hose nozzle) are provided on the top
of the unit as standard (for the valve positions, see
fig. 12). Alternatively, they can also be installed on
the underside of the unit (3/4˝ internal thread) – in this
case, the hose barb fitting from the top can be used.
Valves for water connecion at the top
of the unit
Fig. 12:
Fig. 9:
Remove hose barb fitting from the top
Valves for water connecion at the top
Note:
The water circuit should be protected from
ingress of dirt or excess pressure (maximum
permitted operating pressure 10 bar)!
Note:
Pressure limitation
No increase in cooling output is achieved
with flow rates > 3,000 l/h. Appropriate
measures must be taken to regulate the
flow rate, e.g. balancing valves
(model nos. SK 3301.930/.940).
Fig. 10:
Fit hose barb fitting on the bottom connection
The cooling water hose
– must be laid without kinks
– must not have a reduced cross-section if extended
and, if necessary, must be insulated.
Valves for water connecion at the bottom
of the unit
Fig. 11:
8
Valves for water connecion at the bottom
Note:
Observe the flow direction and check for
leaks!
The units do not have any separate ventilation.
䡲 For pressure-sealed systems, install the appropriate
ventilation equipment on the water side. This must
be carried out only by authorised expert personnel.
4.5.1 Notes on water quality
To ensure the reliable operation of the above-mentioned units, the VBG guidelines for cooling water
must be observed (VGB R 455 P).
The cooling water must not contain any limescale deposits; in other words, it should have a low level of
hardness, in particular, a low level of calcium hardness. In particular, for recooling within the plant, the
calcium hardness should not be too high. On the other hand, the water should not be so soft that it attacks
the materials. When recooling the cooling water, the
salt content should not be allowed to increase excessively due to the evaporation of large quantities of
water, since electrical conductivity increases as the
concentration of dissolved substances rises, and the
water thereby becomes more corrosive.
䡲 Always add the appropriate volume of fresh water.
䡲 Always remove part of the enriched water.
Rittal air/water heat exchanger assembly instructions
4 Assembly and connection
The following criteria for the cooling water must be
observed:
– Water with high gypsum content is unsuitable for
cooling purposes because it has a tendency to
form boiler scale that is particularly difficult to
remove.
– The cooling water should be free from iron and
manganese, otherwise deposits may occur that
accumulate in the pipes and block them.
– At best, organic substances should only be present in small quantities, otherwise sludge deposits
and microbiological contamination may occur.
4.5.2 Preparation and maintenance of the water
in recooling systems
Depending on the type of installation to be cooled,
certain requirements are placed on the cooling water
with respect to purity. According to the level of contamination and the size and design of the recooling
systems, a suitable process is used to prepare and/
or maintain the water.
The most common types of contamination and most
frequently used techniques to eliminate them in
industrial cooling are:
Contamination of the water
Procedure
Mechanical contamination
Filter the water using:
– Mesh filter
– Gravel filter
– Cartridge filter
– Precoated filter
Excessive hardness
Water softening via ion exchange
Moderate content of mechanical contaminants and
hardeners
Addition of stabilisers and/or dispersing agents
to the water
Moderate content of chemical contaminants
Addition of passifiers and/or inhibitors to the water
Biological contaminants, slime bacteria and algae
Addition of biocides to the water
Tab. 2: Water contaminants
4.6 Notes on electrical installation
When carrying out the electrical installation, it is
important to observe all valid national and regional
regulations as well as the provisions of the responsible power supply company. Electrical installation
must only be carried out by a qualified electrician
who is responsible for compliance with the existing
standards and regulations.
4.6.1 Connection data
– The connected voltage and frequency must correspond to the values stated on the rating plate.
– The air/water heat exchanger must be connected
to the mains via an all-pin isolating device that
ensures at least 3 mm contact opening when
switched off.
– No additional temperature control may be connected upstream of the unit at the supply end.
– Install the pre-fuse cited on the rating plate to
protect the cable and equipment from shortcircuits.
– The mains connection must ensure low-noise
potential equalisation.
Rittal air/water heat exchanger assembly instructions
4.6.2 Overvoltage protection
and supply line load
– The unit does not have its own overvoltage protection. Measures must be taken by the operator at
the supply end to ensure effective lightning and
overvoltage protection. The mains voltage must
not exceed a tolerance of ±10%.
– In accordance with IEC 61 000-3-11, the unit is
intended solely for use at sites with a continuous
current-carrying capacity (incoming mains power
supply) of more than 100 A per phase and with
a supply voltage of 400/230 V. If necessary, the
power supply company must be consulted to ensure that the continuous current-carrying capacity
at the point of connection to the public grid is
sufficient for connection of such a unit.
– The fans are intrinsically safe (thermal winding protection). The same also applies to all transformer
versions and to special-voltage units which are
equipped with a transformer.
– Install the slow pre-fuse specified on the rating
plate (miniature circuit-breaker with “K” characteristic, motor circuit-breaker or transformer circuitbreaker) to protect the cable and equipment
from short-circuits. Select a suitable motor circuitbreaker/transformer circuit-breaker in accordance
with the information specified on the rating plate:
Set it to the minimum specified value. This will
achieve the best short-circuit protection for cables
and equipment. Example: Specified setting range
MS/TS 6.3 – 10 A; set to 6.3 A.
9
EN
4 Assembly and connection
EN
4.6.3 Potential equalisation
Rittal recommends connecting a conductor with a
nominal cross-section of at least 6 mm2 to the potential equalisation connection point in the air/water
heat exchangers, and incorporating it into the potential equalisation system.
According to the standard, the PE conductor in the
mains connection cable is not classified as an equipotential bonding conductor.
4.6.4 Installing the power supply
䡲 Complete the electrical installation in accordance
with the wiring plan to be found behind the open
door of the air/water heat exchanger.
䡲 The electrical connection can be made on either
the right- or left-hand side of the air/water heat
exchanger, using the terminal strip included in the
accessories bag.
Fig. 13:
Protective cover
䡲 Remove the protection cover on the side on which
the electrical connection is to be made.
䡲 To be able to evaluate the system messages of the
air/water heat exchanger via the system message
relay, a corresponding low-voltage cable must be
connected additionally on terminals 1 – 3.
SK 3378.XXX
1˜ 230 V AC 50/60 Hz
4A
Power
Supply 2
1˜ 230 V AC 50/60 Hz
4A
Power
alternative
Supply 1
Alarm
Signal
XSC1 L
Alarm
Signal
N PE 1 2 3
XSC2 L
W1
User Interface
N PE 1 2 3
W2
X1 L
X1 L
N PE 1 2 3
PE
W4
W3
A2
W10
N PE 1 2 3
PE
8
NC
C
N0
PE
Interface
8 pole
1 2 3
Kx
Power
D0-A
Temperature Sensor
W9
1 2 3
L
N
PE
NTC_I
A1
NTC_E
S2
N N L L´
4 3
2 1
W5
PE
X2
4 5
PE
PE
X2
W6
XS1
B1
W11
D0-E
D0-I
L N
1 2 3 4 5 6
4 5
PE
W7
XS2
M
1~
PE
6 7
X2
PE
W8
L N
1 2 3 4 5 6
M
1~
L
PE
N
M1
M2
Y1
Evaporator Fan 1
Evaporator Fan 2
Water Valve
Key
A1
A2
B1
D0-A
M1
M2
S2
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
X1
X2
XSC1
XSC2
Y1
Power PCB
Display terminal
Internal temperature sensor, red
Collective fault relay
Internal fan 1
Internal fan 2
Float-actuated switch (optional)
Power cable 1, 7 x 1 mm2
Power cable 2, 7 x 1 mm2
Power cable, 2 x 1 mm2
Power cable, 4 x 1 mm2
Power cable, 5 x 1 mm2
Cable fan 1, 3 x 1 mm2
Cable fan 2, 3 x 1 mm2
Cable valve, 3 x 1 mm2
Signal cable sensor, 2 x 0.25 mm2
Signal cable interface, 8 x 0.25 mm2
Cable level switch, 2 x 0.5 mm2
Terminal strip
Terminal strip
Main terminal strip 1
Main terminal strip 2
Magnetic valve
Caution!
Only one power supply may be used.
Fig. 14:
10
Electrical wiring plan
Rittal air/water heat exchanger assembly instructions
5 Commissioning
5
Commissioning
Note:
With the Basic controller, the temperature is
preset at the factory to +35 °C. In order to
save energy, do not set the temperature lower
than that actually necessary.
䡲 Once all the assembly and installation work is com-
plete, switch on the power supply to the air/water
heat exchanger.
The air/water heat exchanger starts running and the
enclosure internal temperature is displayed.
You can now make your individual settings on the
unit, e.g. set the temperature.
6
Operation
You can operate the air/water heat exchanger using
the display on the front of the unit (fig. 1, no. 4,
page 4). The unit is equipped with a Basic controller.
6.1 Control using the Basic controller
6.1.1 Display and system analysis
H2 = Key
H1 = Display terminal
Fig. 15:
K1
H3 = Key
6.1.5 Temperature setting
(see page 12, tab. 4)
The setting of the enclosure internal temperature is
preset at the factory to 35 °C. To change the value
press key H2 (▲ K1) or H3 (▼ K2) for one second
until °1 appears in the display, then confirm with the
H4 “set” key.
The set value can then be altered within the preset
parameters (+20 °C to +55 °C) via the keys H2 (▲ K1)
or H3 (▼ K2). Press the H4 “set” key for 1 seconds to
save the new value. The current enclosure internal
temperature is displayed again.
H4 = Key set/°F
K2
Display and system analysis of the Basic controller
6.1.2 Properties
The air/water heat exchanger operates automatically, i.e. after switching on the power supply, the
fan (see fig. 2, page 4) will run continuously and
permanently circulate the internal enclosure air.
The magnetic valve controls the cooling water flow
as specified by the temperature setpoint. The built-in
Basic controller ensures automatic normal shutdown operation of the air/water heat exchanger by
the value of the fixed preset switching difference
of 5 K.
6.1.3 General programming information
Using buttons H2, H3 and H4 (fig. 15) you can
change 3 parameters within the preset ranges
(target value, min. value, max. value).
Tables 4 and 5 on page 12 show the parameters
which can be altered.
6.1.4 Operation of the basic controller
The display terminal “H1” consists of a 3-position
7-segment display which indicates the temperature
in °C as well as any system messages. The current
enclosure internal temperature is usually displayed
permanently. In the event of a system message, this
will alternate with the internal temperature display.
Rittal air/water heat exchanger assembly instructions
6.1.6 Setting of system messages
(see page 12, tab. 5)
To change the system messages keep the H4 “set”
key pressed for 5 seconds. The controller is now in
programming mode. While in programming mode,
if you do not press any buttons for approx.
60 seconds, the display will first flash, then the controller will switch back to normal display mode. You
can then navigate in the levels with the H2 (▲ K1) or
H3 (▼ K2) keys (see table 3).
The level is selected by pressing the H4 button.
The parameters are changed with the H2 (▲ K1) or
H3 (▼ K2) keys. Press the H4 “set” key for 5 seconds
to confirm the new value.
Alarm System
no.
message
Cause
Remedy
HI
Internal
temperature
of enclosure
too high
Cooling capacity
inadequate/unit
undersized/unit
defective
Check
cooling
capacity/
check unit
LO
Internal
temperature
of enclosure
too low
Ambient temperature too low/no
heat loss in the
enclosure
Check unit
IA
Leakage
warning/
condensate
warning
Heat exchanger
leaky/condensate
discharge kinked
or blocked
Check heat
exchanger
for leaks/
check
condensate
discharge
Tab. 3: Warning messages on the display
11
EN
6 Operation
EN
6.1.7 Programming and control of the Basic controller
See also fig.16 on page 13.
Progr.
level
Display
screen
Parameter
Min. Max. Factory
value value setting
Description
0
1
Ps
°1
–
Internal enclosure
temperature
setpoint Ti
–
20
No function
The setting of the enclosure internal temperature is
preset at the factory to 35 °C and may be altered
within a range of +20 °C to +55 °C. When the setpoint
is reached, the “H2” (▲ K1) key is lit continuously.
–
55
–
35
Tab. 4: Setting the setpoint
Progr.
level
Display
screen
Parameter
Min. Max. Factory
value value setting
Description
2
H5
Software
version number
–
–
–
Displays the current version number of the device
software.
3
AH
Alarm – maximum
temperature
AL
+150
50
Maximum temperature alarm (NOT in relation to the
nominal value). HI is displayed alternating with the
internal temperature. The “HI” alarm is displayed
when the internal temperature > HI.
The alarm stops when the internal temperature
< AH –2K.
4
AL
Alarm – minimum
temperature
–50
AH
20
Minimum temperature alarm (NOT in relation to the
nominal value). LO is displayed alternating with the
internal temperature. The “LO” alarm is displayed
when the internal temperature < LO.
The alarm stops when the internal temperature
> AL +2K.
5
r8
Reset of r6 and r7
0
1
0
Reset of r6 and r7. Set this parameter to 1 to reset the
stored maximum and minimum values of r6 and r7 to
the respective current actual value.
6
r7
Querying of the
min. internal
temperature
–50
+150
0
Stores the min. internal enclosure temperature
occurring after > 1 min.
7
r6
Querying of the
max. internal
temperature
–50
+150
0
Stores the max. internal enclosure temperature
occurring after > 1 min.
Tab. 5: Setting the system messages, monitoring of the min./max. enclosure internal temperature
6.2 Reset r6 and r7
(min./max. internal temperature)
To reset the stored internal temperatures keep the
H4 “set” key pressed for 5 seconds.
Navigate to level r8 with the H2 (▲ K1) or H3 (▼ K2)
keys. Press the H4 “set” key and change the parameter from 0 to 1 using the “H2” (▲ K1) or the “H3”
(▼ K2) keys.
Press the H4 “set” key for 5 seconds to confirm resetting the values.
12
6.2.1 System message contact (K1; floating)
The relay is normally closed. All assigned system
messages lead to the relay dropping out – and likewise to loss of the control voltage. Terminal strip X1
provides the connection. For contact data and
occupancy – see the wiring diagram in chapter
“4.6.4 Installing the power supply”, page 10.
K1 fault signal relay (normally open contact/
changeover contact)
– Terminal 1: NO (normally open)
– Terminal 2: C (connection of the supply voltage to
the fault signal relay)
– Terminal 3: NC (normally closed)
The NC and NO definitions refer to the de-energised
state.
Rittal air/water heat exchanger assembly instructions
6 Operation
6.2.2 Programming overview of Basic controller
EN
Setpoint
K1
= 1 sec.
K1
K1
K2
K2
= 1 sec.
K1
K1
K2
K2
Parameters
= 5 sec.
K1
K2
= 5 sec.
K1
K1
K2
K2
K1
K2
K1
K1
K2
K2
K1
K1
K2
K2
K1
K1
K2
K2
K1
K2
K1
K2
K1
K1
K2
K2
Fig. 16:
Programming overview of Basic controller
Rittal air/water heat exchanger assembly instructions
13
7 Inspection and maintenance
7
Inspection and maintenance
EN
Risk of electric shock!
The unit is live.
Switch off the power supply before
opening, and take suitable precautions
against it being accidentally switched
on again.
7.1 General
The air/water heat exchanger is largely maintenance
free. The water circuit is checked at the factory for
leaks and subjected to a function trial run.
The installed maintenance-free fan is mounted on
ball bearings, protected against moisture and dust,
and fitted with a temperature monitor. The life expectancy is at least 60,000 operating hours. The air/
water heat exchanger is consequently largely maintenance free. If dirt is present in the cooling water,
a filter must be fitted.
Maintenance interval: 2,000 operating hours.
Fig. 18:
Remove the metal plates
Fig. 19:
Loosen the screws
Caution!
Risk of fire!
Never use flammable liquids for
cleaning.
Sequence of maintenance measures:
– Check the level of dirt.
– Check the noise generation of the fan.
7.1.1 Fan replacement
Note:
After removing the screws, the fans can be
removed to the front and through the door
for replacement.
Fig. 17:
Open door
Fig. 20:
14
Disconnect the connector from the display
Rittal air/water heat exchanger assembly instructions
8 Storage and disposal
8
Storage and disposal
9
Technical specifications
EN
RITTAL
Rittal GmbH & Co. KG
Auf dem Stützelberg
D-35745 Herborn
Caution! Risk of damage!
The air/water heat exchanger must
not be subjected to temperatures above
+70 °C during storage.
WA:
SK3378.100
During storage, the air/water heat exchanger must
stand upright.
Disposal can be performed at the Rittal plant.
Please contact us for advice.
Luft/Wasser - Wärmetauscher
Air/water heat exchanger
Echangeur de temperature air/eau
Lucht/Water - Warmtewisselaar
Luft/vatten vaermeevaexlare
Scambiatore di calore ad aria/acqua
Intercambiador de calor aire/agua
Nennspannung
1/230V 50 Hz
Rated voltage
Nennstrom
3,04 A
Rated current
Vorsicherung
4A
Pre-fuse gG
Nennleistung
704 W
Nominal refrigeration
Nutzkuehlleistung W/K
Cooling capacity
2000l/h
Nutzkuehlleistung
L35 10 W
Usefull cooling output
Kuehlmedium
Wasser - water
Refrigerant
Betriebsdruck
- 3 bar
Operating pressure
Temperaturbereich
+5
- +70 °C
Temperature range
Geraeuschpegel
70
dB(A)
Noise level
Schutzart EN 60529
IP 54
Protective category
Gewicht
130 kg
Weight
Baujahr
Year of Construction
Fabr.-Nr.:
Production No.
Fig. 21:
1/230 V 60Hz
3,54 A
4A
816 W
10000 W
09/02/2012
K
Rating plate (technical data)
– Observe the mains connection data (voltage and
frequency) as per the rating plate.
– Observe the pre-fuse as per the specifications on
the rating plate.
Cooling medium
Water (for specifications see operating instructions)
Model No. SK
3378.100
3378.180
Rated operating voltage V, Hz
230, 50/60
230, 50/60
Dimensions in mm
Useful cooling output kW
W x H x D 300 x 2000 x 600
L35 W10, 2000 l/h 10
Air throughput of fans (unimpeded air flow)
300 x 2000 x 800
10
1060 m3/h per fan
Rated current
3.04 A/3.54 A
Pre-fuse T
4A
Power consumption Pel to DIN 3168
704 W/816 W
Water inlet temperature
>+7 °C to +30 °C
Permissible operating pressure p. max.
1 to 10 bar
Operating temperature
+5 °C to +70 °C
Setting range
+20 °C to +55 °C
Protection category to IEC 60 529
IP 54
Duty cycle
100%
Electrical connection
Connection clamp
Water connection
3/
Weight, max.
121 kg
4˝
hose nozzle or 3/4˝ internal thread
130 kg
Tab. 6: Technical specifications
Rittal air/water heat exchanger assembly instructions
15
10 List of spare parts
10 List of spare parts
EN
Legend
10 Fan
15 Dispatch bag
32 Magnetic valve
33 Non-return valve
40 Controller board
55 Controller (display)
71 Temperature sensor
73 Leak detection
SK 3378.XXX
10
55
71
Note:
As well as the spare part number,
when ordering spare parts the following
information must be provided:
– Unit model
– Fabrication number
– Date of manufacture
This information may be found on the
rating plate.
40
73
33
15
32
Fig. 22:
Spare parts for SK 3378.XXX
11 Further technical information
11.1 Hydrological data
To avoid system damage and to ensure safe operation, Rittal GmbH & Co. KG recommends the use of
Hydrological data
Unit
–
pH value
system water or an additive whose composition
does not differ from that presented in the following
summary:
Model No. SK
3378.100/3378.180
7 – 8,5
Calcium hardness
°dH
3<8
Free carbonic acid
mg/dm3
8 – 15
Corresponding carbonic acid
mg/dm3
8 – 15
Aggressive carbonic acid
mg/dm3
0
Sulphides
mg/dm3
free
Oxygen
mg/dm3
< 10
Chloride ions
mg/dm3
< 50
Sulphate ions
mg/dm3
< 250
Nitrates and nitrites
mg/dm3
< 10
COD
mg/dm3
<7
Ammonia
mg/dm3
<5
Iron
mg/dm3
< 0,2
Manganese
mg/dm3
< 0,2
Conductivity
µS/cm
< 2200
Residue on evaporation
mg/dm3
< 500
Potassium permanganate
mg/dm3
< 25
mg/dm3
<3
mg/dm3
> 3 < 15; partial current purification recommended
mg/dm3
> 15; continuous purification recommended
Suspended matter
1)
The complete absence of corrosion under experimental conditions suggests that solutions with a significantly higher salt content and
greater corrosion potential (such as seawater) can still be tolerated.
Tab. 7: Hydrological data
16
Rittal air/water heat exchanger assembly instructions
11 Further technical information
11.2 Characteristic curves
EN
11.2.1 Water resistance
2.5
2
1.5
P
1
0.5
0
0
10
20
30
.
V
Fig. 23:
40
50
60
Water resistance [ΔP] = bar
.
Volumetric flow [V] = l/min
Water resistance SK 3378.100/SK 3378.180
Rittal air/water heat exchanger assembly instructions
17
12 Dimensions
12 Dimensions
EN
297
605
524.8
105.5
75
400
481
605
230
314.5
96.5
2004.5
116
105
230
400
95
107
Fig. 24:
SK 3378.100
805
297
106.5
724.5
96.5
75
724
604
230
317.2
600
108
230
2004.5
116
600
Fig. 25:
18
SK 3378.180
Rittal air/water heat exchanger assembly instructions
13 Application example
13 Application example: Parallel connection of 4 air/water heat exchangers
Example: Parallel connection of air/water heat
exchangers with cold water supply via a recooling
system.
2
2
1
4
5
4
6
1
2
3
2
2
3
Fig. 26:
Overflow valves and bypass control should be integrated into the recooling system and the customer’s
own pipeline system respectively.
4
4
Recooling system
Air/water heat exchanger
Overflow valve
(bypass function with
closed magnetic valve
in the air/water heat
exchanger)
4 Flow regulator valve
(for volumetric flow control
for air/water heat
exchangers)
5 Non-return valve (optional)
6 Magnetic valve (optional)
Parallel connection of 4 air/water heat exchangers
Rittal air/water heat exchanger assembly instructions
19
䡲
䡲
䡲
䡲
1st ed. 12.2012 / ID no. 330 825
䡲
Enclosures
Power Distribution
Climate Control
IT Infrastructure
Software & Services
RITTAL GmbH & Co. KG
Postfach 1662 · D-35726 Herborn
Phone +49(0)2772 505-0 · Fax +49(0)2772 505-2319
E-mail: [email protected] · www.rittal.com
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