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威图空调说明书

Montage-, Installations- und Bedienungsanleitung

Assembly and operating instructions

Manuel d’installation et de maintenance

Montage- en bedieningshandleiding

Montage- och hanteringsanvisning

Istruzioni di montaggio

Instrucciones de montaje

R

Schaltschrank-Kühlger?t

Cooling unit

Climatiseur

Koelaggregaat

Kylaggregat

Condizionatori per armadi di comando

Refrigerador para armarios SK 3302.xxx SK 3302.3xx SK 3303.xxx SK 3304.xxx SK 3305.xxx

SK 3328.xxx

SK 3329.xxx SK 3332.xxx SK 3361.xxx SK 3366.xxx SK 3377.xxx

Rittal cooling unit assembly instructions 3GB

Contents

1Notes on documentation. . . . . . . . . . 4

1.1Associated documents. . . . . . . . . . . . . . . . . 4

1.2CE labelling . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3Retention of documents. . . . . . . . . . . . . . . . 4

1.4Symbols used . . . . . . . . . . . . . . . . . . . . . . . . 4

2Safety notes . . . . . . . . . . . . . . . . . . . . 4

3Device description. . . . . . . . . . . . . . . 5

3.1Functional description . . . . . . . . . . . . . . . . . 5

3.1.1How it works . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1.2Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1.3Bus mode (Comfort controller only) . . . . . . . . 5

3.1.4Safety equipment . . . . . . . . . . . . . . . . . . . . . . 6

3.1.5Condensation . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.1.6Filter mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.1.7Door limit switch . . . . . . . . . . . . . . . . . . . . . . . 6

3.1.8Additional interface X3 . . . . . . . . . . . . . . . . . . 7

3.2Proper usage. . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3Scope of supply . . . . . . . . . . . . . . . . . . . . . . 7

4Assembly and connection . . . . . . . . 7

4.1Choosing an installation site. . . . . . . . . . . . 7

4.2Assembly instructions . . . . . . . . . . . . . . . . . 7

4.2.1General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.2.2Layout of the electronic components

in the enclosure. . . . . . . . . . . . . . . . . . . . . . . . 8

4.3Fitting the cooling unit . . . . . . . . . . . . . . . . . 8

4.3.1Cutting out the enclosure . . . . . . . . . . . . . . . . 9

4.3.2External mounting of the cooling unit . . . . . . . 9

4.3.3Partial internal mounting of the cooling unit . . 9

4.3.4Full internal mounting of the cooling unit . . . 11

4.4Connecting the condensate drain. . . . . . . 11

4.5Notes on electrical installation . . . . . . . . . 12

4.5.1Connection data . . . . . . . . . . . . . . . . . . . . . . 12

4.5.2Overvoltage protection and

supply line load . . . . . . . . . . . . . . . . . . . . . . . 12

4.5.3Three-phase devices . . . . . . . . . . . . . . . . . . 12

4.5.4Door limit switch . . . . . . . . . . . . . . . . . . . . . . 12

4.5.5Notes on the flicker standard . . . . . . . . . . . . 12

4.5.6Potential equalisation . . . . . . . . . . . . . . . . . . 13

4.6Carrying out the electrical installation . . . 13

4.6.1Bus connection

(only in conjunction with several units

with a Comfort controller) . . . . . . . . . . . . . . . 13

4.6.2Installing the power supply. . . . . . . . . . . . . . 14

4.7Finalising assembly . . . . . . . . . . . . . . . . . . 21

4.7.1Installing the filter media . . . . . . . . . . . . . . . 21

4.7.2Fitting the cooling unit. . . . . . . . . . . . . . . . . . 21

4.7.3Setting the filter mat monitor

(only with Comfort controller) . . . . . . . . . . . . 21

5Commissioning . . . . . . . . . . . . . . . . 216Operation . . . . . . . . . . . . . . . . . . . . . 22 6.1Control using the Basic controller . . . . . . 22 6.1.1Properties. . . . . . . . . . . . . . . . . . . . . . . . . . . .226.1.2Operating and error display. . . . . . . . . . . . . .236.1.3Test mode for the Basic controller. . . . . . . . .236.1.4Setting the temperature . . . . . . . . . . . . . . . . .246.1.5Resetting the Basic controller . . . . . . . . . . . .246.2Control using the Comfort controller. . . . 246.2.1Properties. . . . . . . . . . . . . . . . . . . . . . . . . . . .246.2.2Launching test mode . . . . . . . . . . . . . . . . . . .256.2.3General information about programming. . . .256.2.4Variable parameters. . . . . . . . . . . . . . . . . . . .266.2.5Programming overview . . . . . . . . . . . . . . . . .276.2.6Defining system messages for evaluation . . . . . . . . . . . . . . . . . . . . . . . . .286.2.7Setting the master/slave identifier . . . . . . . . .296.2.8Evaluating system messages. . . . . . . . . . . . .296.2.9Resetting the Comfort controller . . . . . . . . . .31 7Inspection and servicing. . . . . . . . . 31 7.1General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 7.1.1Compressed air cleaning SK 3304.xxx/SK 3305.xxx . . . . . . . . . . . . . . .317.1.2Compressed air cleaning SK 3328.xxx, SK 3329.xxx, SK 3332.xxx . . . . . . . . . . . . . . .35 8Storage and disposal. . . . . . . . . . . . 409Technical specifications . . . . . . . . . 4110List of spare parts . . . . . . . . . . . . . . 4411Appendix: Cut-out and hole sizes. . . . . . . . . . . 48

11.1Dimensions for external mounting. . . . . . 4811.2Dimensions for partial internal mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . 4911.3Dimensions for full internal mounting . . . 50

1 Notes on documentation

GB 1Notes on documentation

These assembly instructions are aimed at tradesper-

sons who are familiar with assembly and installation

of the cooling unit, and at trained specialists who are

familiar with operation of the cooling unit.

1.1Associated documents

There are two sets of instructions for the unit types

described here:

–Assembly and installation instructions enclosed

with the unit in the form of a paper document.

–Assembly, installation and operating instructions

enclosed with the unit in the form of a PDF file

(Adobe Acrobat) on CD-ROM.

We cannot accept any liability for damages asso-

ciated with failure to observe these instructions.

Where applicable, the instructions for any acces-

sories used shall also apply.

1.2CE labelling

The declaration of conformity is supplied with the unit

as a separate document.

1.3Retention of documents

These instructions and all associated documents

shall constitute an integral part of the product. They

must be supplied to the plant operator. The plant

operator shall be responsible for storage of the

documents, to ensure that they are readily available

when needed.

1.4Symbols used

Please observe the following safety instructions and

other notes in this guide:

Symbol for an instructed action:

?The bullet point indicates that you should perform

an action.

Safety and other instructions:

2Safety notes

Please observe the following general safety instruc-

tions when assembling and operating the unit:

–Assembly, installation and servicing must only be

carried out by properly trained specialists.

–Screw the enclosure to the floor to prevent it from

tipping over when the cooling unit is installed.

–Do not obstruct the air inlet and air outlet of the

cooling unit inside and outside the enclosure

(see also section 4.2.2).

–To ensure problem-free opening and closing of the

enclosure door, use a ride-up door roller (refer to

the accessories in the Rittal Catalogue). This raises

the door slightly and balances out the weight of the

cooling unit, to prevent buckling of the door and

associated seal problems.

–The heat loss of the components installed in the

enclosure must not exceed the specific useful

cooling output of the cooling unit.

–When transporting the enclosure with the cooling

unit externally mounted, always use an additional

shipping brace to support the cooling unit.

–The cooling unit must always be transported in an

upright position.

–Only use original spare parts and accessories.

–Do not make any changes to the cooling unit other

than those described in these instructions or asso-

ciated instructions.

–Risk of burn injuries! For cooling units with auto-

matic condensate evaporation, the surface of the

thermal element will get very hot during operation,

and will remain so for some time afterwards.

–The mains connector of the cooling unit must only

be connected and disconnected with the system

de-energised. Connect the pre-fuse specified on

the rating plate.

威图空调说明书

4Rittal cooling unit assembly instructions

3 Device description

Rittal cooling unit assembly instructions5GB

3Device description

Depending on the model chosen, your cooling unit may vary in appearance from the illustrations con-tained in these instructions. However, the functions are identical in principle.

Fig. 1:Device description

Key

1Blind nut

2Evaporator fan

3Electrical wiring plan

4X2 master/slave connection

5X3 optional serial interface

6X1 terminal strip

7Air outlet hole

8Front half of the enclosure

9Rear half of the enclosure

10Louvred grille for air outlet

11Controller

12Infill panel

13Louvred grille for air inlet

14Rating plate

15Condensate discharge

16Dispatch bag

3.1Functional description

Enclosure cooling units are designed to dissipate heat from enclosures by cooling the air inside the enclosure and protecting temperature-sensitive components. They are built into the side or rear panel or into the door of the enclosure.

3.1.1How it works

The cooling unit (compression refrigeration system) is comprised of four main components (see Fig. 2): the evaporator (1), the coolant compressor (2), the condenser (3), and the control or expansion valve (4), which are connected by suitable pipework. This circuit is filled with a readily boiling substance, the refrigerant. Coolant R134a (CH2FCF3) is chlorine-free. Its ozone destruction potential is 0, making it very eco-friendly. A filter dryer (5) which is integrated into the hermetically sealed cooling circuit provides effective protection against moisture, acid, dirt par-ticles, and foreign bodies within the cooling circuit.

Fig. 2:Cooling circuit

In the evaporator coil (1), the liquid coolant is con-verted to a gaseous state. The energy needed for this purpose is taken from the enclosure air in the form of heat, which has the effect of cooling the enclosure air. In the compressor (2), the coolant is heavily compressed, so that it achieves a higher temperature inside the condenser (3) than the ambient air. This means that excess heat may be emitted to the ambient air via the surface of the con-denser, as a result of which the temperature of the coolant drops and it is converted back into liquid. It is re-injected into the evaporator coil via a thermo-static expansion valve (4), which causes it to cool down further, and is then once again able to absorb the energy from the enclosure air in the evaporator coil. The whole cycle begins again.

3.1.2Controller

Rittal enclosure cooling units are fitted with a control-ler for setting the functions of the cooling unit. Depending on the design, this is either a Basic con-troller (display of the operating status via LED) or a Comfort controller (display plus extended functions, see chapter “6 Operation”, page 22).

3.1.3Bus mode (Comfort controller only)

The serial interface X2 allows you to create a bus connection with up to 10 cooling units using the master/slave cable (shielded, four-wire cable, Model No. SK 3124.100). This allows you to imple-ment the following functions:

–Parallel unit control (the cooling units in the network can be switched on and off simultaneously)

–Parallel door status message (“door open”)

–Parallel collective fault message

Data is exchanged via the master/slave connection. During commissioning, an address is assigned

to each device which also includes the identifier “master” or “slave”.

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3 Device description

GB 3.1.4Safety equipment

–In the cooling cycle, the cooling unit has a tested

pressure-operated switch to EN 12 263 which is

set to maximum PS (admissible pressure); this

operates via an automatic reset device whenever

the pressure drops again.

–Temperature monitoring prevents the evaporator

coil from icing over. If there is a risk of icing over,

the compressor switches itself off and automati-

cally switches itself on again at higher tempera-

tures.

–The refrigerant compressor and the fans are

equipped with thermal winding shields to protect

against excess current and excess temperatures.

–In order to allow a reduction of pressure inside the

compressor and hence a safe restart, once it has

been switched off (e.g. upon reaching the set tem-

perature via the door limit switch function or via de-

energising), the device will switch back on with a

delay of 180 seconds.

–The device has one (in the case of the Basic con-

troller) or two (in the case of the Comfort controller)

integral floating contacts on the connection clamp

(system message relay with changeover contact,

terminal 3 – 5) which may be used to retrieve

messages from the cooling unit, e.g. via PLC.

3.1.5Condensation

At high levels of humidity and low temperatures

inside the enclosure, condensation may form on the

evaporator coil.

The cooling units (except SK 3302.xxx, SK 3303.xxx

and SK 3361.xxx) have automatic, electric conden-

sate evaporation. The thermal component used for

this purpose is based on self-regulating PTC tech-

nology. Condensation arising on the evaporator coil

is collected in a tank in the external circuit of the

cooling unit, and partially evaporated via the airflow.

When the water level rises, the water enters the PTC

thermal component and is evaporated (through-flow

principle). The water vapour flows out of the cooling

unit with the airflow from the external fan.

The PTC thermal component is permanently con-

nected and has no switchpoint. It is protected

against short-circuits with miniature fuses. If the fuse

has tripped, any condensation is drained off via the

safety overflow.

For unit types SK 3302.xxx, SK 3303.xxx and

SK 3361.xxx, the condensation is routed downwards

out of the unit via a drain pipe on the evaporator coil

divider panel. For this purpose, a hose must be con-

nected to the condensate nozzle (see “4.4 Connect-

ing the condensate drain”, page 11). External con-

densate evaporators are available as accessories

for these unit types (refer also to the accessories in

the Rittal Catalogue).

3.1.6Filter mats

The entire condenser in the cooling units is finished

with a dirt-repelling, easy-to-clean RiNano coating.

In many cases, therefore, the use of filter media is

unnecessary, particularly in the case of dry dusts.

For coarse dust and lint in the enclosure air, we

recommend installing an additional PU foam filter

mat (available as an accessory) in the cooling unit.

Depending on the incidence of dust, you will need to

replace the filter from time to time.

For air containing oil condensation, we recommend

the use of metal filters (also available as an acces-

sory). These may be cleaned with suitable deter-

gents and reused.

Function of the filter mat monitor:

Dirt on the filter mat is automatically determined by

measuring the temperature difference in the external

circuit of the cooling unit. As the level of filter mat

soiling rises, the temperature difference will increase.

The nominal value of the temperature difference in

the external circuit adapts automatically to the rele-

vant operating points in the performance diagrams.

Hence there is no need to readjust the nominal value

for different unit operating points.

3.1.7Door limit switch

The cooling unit may be operated with a door limit

switch connected. The door limit switch is not

included with the supply (available as an accessory,

Model No. PS 4127.000).

The door limit switch function causes the fans and

the compressor to be switched off after approxi-

mately 15 seconds when the enclosure door is

opened (contacts 1 and 2 closed). This prevents the

formation of condensation inside the enclosure while

the enclosure door is open. In order to prevent dam-

age to the unit, it is equipped with an ON delay: The

evaporator fan cuts back in with a delay of approxi-

mately 15 seconds after the door has been closed,

while the condenser fan and compressor switch on

after approximately 3 minutes.

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6Rittal cooling unit assembly instructions

4 Assembly and connection

Rittal cooling unit assembly instructions7GB

3.1.8Additional interface X3

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Tab. 1:Scope of supply 4Assembly and connection

4.1Choosing an installation site

When choosing an installation site for the enclosure, please observe the following:

–The installation site and the positioning of the cooling unit must be selected in such a way as to ensure good ventilation (distances between units and distances between the unit and the wall must be at least 200 mm in each case).

–The cooling unit must be installed and operated in a vertical position (maximum deviation: 2°).

–The site must be free from excessive contamina-tion and moisture.

–The ambient temperature must not exceed 55°C.–It must be possible to create a condensate drain (see “4.4 Connecting the condensate drain”, page 11).

–The mains connection data as stated on the rating plate of the device must be guaranteed.

4.2Assembly instructions

4.2.1General

–Check the packaging carefully for signs of damage. Traces of oil on damaged packaging are an indica-tion of refrigerant loss and leakages. Any packaging damage may be the cause of a subsequent func-tional failure.

–The enclosure must be sealed on all sides (IP 54). Condensation will occur if the enclosure is not air-tight.

–In order to avoid excessive condensation in the enclosure, we recommend installing a door limit switch (e.g. PS 4127.000) which deactivates the cooling unit when the enclosure door is opened (see “3.1.7 Door limit switch”, page 6).

4 Assembly and connection

GB 4.2.2Layout of the electronic components

in the enclosure

Fig. 3:Never direct the cold air flow at active components

Air diversion components are available as acces-

sories – please refer to the Rittal Catalogue under

“System climate control”.

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.

Measure the distance “x” (see Fig. 4) from electronic

components and other installed enclosures so that

the required air circulation is not obstructed and pre-

vented.

Fig. 4:Air circulation inside the enclosure

4.3Fitting the cooling unit

The enclosure cooling unit may optionally be exter-

nally mounted on the enclosure (1), partially inter-

nally mounted (2) or fully internally mounted (3):

Fig. 5:Installation method

To this end, cut the side panel or door of the enclo-

sure as per the drilling template included with the

supply, and drill the relevant holes.

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8Rittal cooling unit assembly instructions

4 Assembly and connection

威图空调说明书

Rittal cooling unit assembly instructions 4 Assembly and connection

GB

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pull the enclosure forwards by approx. 5 cm.

?Loosen the flat-pin connectors of the PE conductor

between the two enclosure halves.

?Disconnect the fan connection.

?Remove the front enclosure tray completely.

威图空调说明书

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Fig. 11:Remove the cover

?Remove the four spacer bolts.

?Cut the supplied sealing tape to the correct length

and stick it carefully along the inside of the rear

enclosure half so that no gaps are left at the

connection points.

Fig. 13:Secure the cooling unit ?Connect the fan connector and PE conductor.?Mount the front enclosure tray using the washers and nuts.

?Carefully connect the display connector.?Push the louvred grille and, where applicable, the infill panel, onto the enclosure.

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4 Assembly and connection

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11GB

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Fig. 15:Remove the louvred grille and disconnect the display

?Cut the supplied sealing tape to the correct length and stick it carefully along the front enclosure half so that no gaps are left at the connection points.?Push the louvred grille and, where applicable, the infill panel, onto the enclosure.

4.4Connecting the condensate drain

Unit types SK 3302.xxx, SK 3303.xxx and

SK 3361.xxx support the installation of a condensate discharge hose (? 1/2?).

The condensate drain

–must be laid with a suitable and constant gradient (no siphoning)

–must be laid without kinks

–must not have a reduced cross-section if

威图空调说明书

and secure it with a hose clip.

?Lay the condensate hose into a pay-off or into the external condensate evaporator (refer to Accessories in the Rittal Catalogue).

4 Assembly and connection

GB 4.5Notes 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 respon-

sible 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.

4.5.1Connection data

–The connection voltage and frequency must match

the values specified on the rating plate.

–The cooling unit must be connected to the mains

via an all-pin isolating device, which ensures at

least 3 mm contact opening when switched off.

–No additional temperature control must be con-

nected upstream of the device at the supply end.

–Install the pre-fuse cited on the rating plate (minia-

ture circuit-breaker “K” characteristic or slow fuse)

to protect the cable and equipment from short-

circuits.

–The mains connection must ensure noiseless

potential equalisation.

4.5.2Overvoltage protection and

supply line load

–The unit does not have its own overvoltage protec-

tion. 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 capac-

ity at the point of connection to the public grid is

sufficient for connection of such a unit.

–The fans and compressors in single- and three-

phase units are intrinsically safe (thermal winding

protection). This also applies to the transformer

versions of types SK 3304.110, SK 3304.510,

SK 3305.110, SK 3305.510, SK 3328.110,

SK 3328.510, SK 3329.110 and SK 3329.510 and

to special-voltage units which are likewise

equipped with a transformer.

–Install the pre-fuse cited on the rating plate (minia-

ture circuit-breaker with “K” characteristic, motor

circuit-breaker or transformer circuit-breaker) to

protect the cable and equipment from short-cir-

cuits. Select the motor circuit-breaker/transformer

circuit-breaker in accordance with the information

supplied on the rating plate: Set it to the minimum

value specified. 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.

4.5.3Three-phase devices

–The three-phase variant of models SK 3304.xxx,

SK 3305.xxx, SK 3328.xxx, SK 3329.xxx and

SK 3332.xxx must be connected to a TN grid with

earthed star point (current setting as per rating

plate). Special-voltage three-phase units must

be protected with a transformer circuit-breaker

(category AC-3) as per the rating plate.

–Units designed for three phase 400/460 V have

additional monitoring of the rotary field or the

absence of a phase. If the rotary field is incorrect

or a phase is absent, the unit will not run.

4.5.4Door limit switch

–Each door limit switch must only be assigned to

one cooling unit.

–Several door limit switches may be connected in

parallel and operated on one cooling unit.

–The minimum cross-section for the connection

cable is 0.3 mm2 for a cable length of 2 m.

–The line resistance to the door limit switch must not

exceed a maximum of 50 Ω.

–The door limit switch only supports a floating con-

nection; no external voltages.

–The contact of the door limit switch must be closed

when the door is open.

The safety extra-low voltage for the door limit switch

is provided by the internal power pack: Current

approx. 30 mA DC.

?Connect the door limit switch to terminals 1 and 2

of the connector.

4.5.5Notes on the flicker standard

The flicker limits specified in standard

EN 61 000-3-3 or -3-11 are adhered to, provided

the supply impedance is less than approx. 1.5 Ω.

Where necessary, the unit operator should measure

his connected impedance or consult the responsible

power supply company. If there is no way of influ-

encing the supply impedance and sensitive installed

components (e.g. BUS) experience interference, a

line reactor or starting-current limiting device should

be connected upstream of the cooling unit to restrict

the startup current of the cooling unit.

12Rittal cooling unit assembly instructions

4 Assembly and connection

Rittal cooling unit assembly instructions13GB

4.5.6Potential equalisation

Rittal recommends connecting a conductor with a nominal cross-section of at least 6 mm2 to the poten-tial equalisation connection point in wall-mounted cooling units, and incorporating it into the existing potential equalisation system.

According to the standard, the PE conductor in the mains connection cable is not classified as an equi-potential bonding conductor.

4.6Carrying out the electrical installation 4.6.1Bus connection

(only in conjunction with several units with

a Comfort controller)

When using several cooling units, the serial device interface can be used to connect up to 10 cooling units with the bus cable (Model No. SK 3124.100).

威图空调说明书

–De-energise the cooling units to be connected.–Ensure proper electrical insulation.

–Make sure the cables are not laid in parallel to power lines.

–Make sure that the lines are short.

4 Assembly and connection GB

Fig. 19:Connection example: Master/slave operation

Key

1Serial interface

2Serial interface cable

3Master/slave bus cable (Model No. SK 3124.100) RTT Rittal TopTherm cooling units

X1Supply connection/door limit switch/alarms X2Master/slave connection Sub-D, 9-pole X3Serial interface Sub-D, 9-pole

St.Sub-D connector, 9-pole

Bu.Sub-D jack, 9-pole

Adr.Address

Fig. 20:Connection example: Door limit switch and master/slave operation

Key

1Master cooling unit

2Slave cooling units

3Twin-door enclosure with two door limit switches 4Enclosure with door limit switch 4.6.2Installing the power supply

?Complete the electrical installation by following the wiring plan on the rear of the cooling unit

(see Fig. 1 on page 5, for key see page 20).

?If you would like the system messages from the cooling unit to be evaluated via the system message relay, you should also connect a suitable low-voltage cable to connection clamps 3 – 5.

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14Rittal cooling unit assembly instructions

4 Assembly and connection

Rittal cooling unit assembly instructions 15GB

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Fig. 21:Electrical wiring plan no. 1

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Fig. 22:Electrical wiring plan no. 2

16Rittal cooling unit assembly instructions 4 Assembly and connection

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GB Fig. 23:Electrical wiring plan no. 3

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Fig. 24:Electrical wiring plan no. 4

4 Assembly and connection

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Rittal cooling unit assembly instructions 17GB Fig. 25:Electrical wiring plan no. 5

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Fig. 26:Electrical wiring plan no. 6

18Rittal cooling unit assembly instructions 4 Assembly and connection

威图空调说明书

GB Fig. 27:Electrical wiring plan no. 7

威图空调说明书

Fig. 28:Electrical wiring plan no. 8

4 Assembly and connection

威图空调说明书

Rittal cooling unit assembly instructions 19GB Fig. 29:Electrical wiring plan no. 9

威图空调说明书

Fig. 30:Electrical wiring plan no. 10