Euroclima ZHK 2000, T-TWO, INOVA, ETA Instruction Manual
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In addition to the contents of this manual, the instruction manuals of the component manufacturers
must be followed. In the corresponding chapters is pointed on the manuals. In case of contradiction
between manual ZHK 2000 and components manufacturer for safety instructions, the most restrictive interpretation is valid.
2 Safety instructions
2.1 CE-conformity / installation instructions for safe operation
2.1.1 CE-conformity declaration according to Machinery Directive 2006/42/EC
An AHU (or any part thereof) supplied by EUROCLIMA is by definition of Machinery Directive
2006/42/EC an incomplete machine, because it is limited in function and is only a part of the building system. Accordingly, for a safe operation before the initial start-up, the general in chapter 2.1.2
(Installation instructions for the proper installation in the building system) and in particular in
the following chapters described on-site work must be carried out for a safe operation.
2.1.2 Installation instructions for the proper installation in the building system
For the proper installation of AHU equipment and the safe operation of the system, depending on
the configuration of the AHU, before the first start at least the following points must be implemented or upgraded on responsibility of the client:
Assembly of delivery sections
The deliver sections of the AHU must be assembled and linked together, according to the drawing
supplied on the inner face of fan section door. See the chapter 4 (Foundation / erection) and
chapter 5 (Assembly).
Secure inlet and outlet openings
All the inlet and outlet openings must be connected to ducts or respectively equipped with grilles,
to prevent effectively access from the outside to moving parts (such as fan wheels) during operation.
Repair switch
See chapter 7.3 (Repair switch (emergency stop switch)).
Installation of ceiling units – flat units
See chapter 4.2.4 (Special guidelines for flat units – ceiling units).
Installation of filters
See chapter 5.4 (Filters).
Temperature limitation
By a control system must be ensured, that the AHU is only operated with a supply air temperature
below the allowable maximum (40 ° C, when not stated otherwise in the technical data). For this
purpose, the continuous monitoring of the supply air must be ensured on site.
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Measures regarding noise attenuation
As basis for on-site sound measures calculation (such as for sound attenuators) the on request
available sound data can be used. Information regarding the emitted sound power level over the
openings see the technical data sheet, which is available on request – refer to chapter 10 (
Information on airborne noise emitted by the air conditioning units - on request).
Measures to minimize the risk of water damage or damage caused by similar media
See chapter 4.2.2 (Actions to prevent potential risks).
Motor connection
See chapter 7.2 (AC motors).
Frequency controller for Plug fans
Also if not supplied by EUROCLIMA a frequency converter must be installed to reach the calculated operating point. For details see chapter 7.4 (Variable, frequency-controlled drives (VFD,
frequency converters)).
Connection to an external protective conductor system
See chapter 7.1 (Connecting to an external protective conductor system).
Electric heater
Installation (if not supplied by EUROCLIMA) and connection of thermostats for safety shutdown,
see chapter 7.5 (Electric heaters).
Plate heat exchanger
Installation (if not supplied by EUROCLIMA) and connection of differential pressure switches to
protect the plate heat exchanger from damage in chapter 7.6 (Differential pressure restriction
for plate heat exchangers).
Siphons
Connecting according to chapter 6.3 (Condensate drain).
Dampers with external gear wheels
According to chapter 5.5 (Dampers with external gear wheels).
Flexible connection
Installations (if not supplied by EUROCLIMA) refer to chapter 6.4 (Duct connection).
Frost protection for heat exchangers
Venting, draining of heat exchangers
2.2 Indications for minimizing specific hazards
2.2.1 General indications
An improperly performed maintenance can pose a security risk!
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Risk of thin sheets, when working on AHU
During work on AHU (or on parts), there is a substantial risk of cutting with thin
sheets as e.g. roof sheets, fins of heat exchangers, corners and edges - Use personal protective equipment: wear protective helmet, gloves, safety shoes and long
protective clothing.
Lighting
For work on AHU (maintenance and inspection work) is to provide adequate lighting.
Firefighting in case of fire
In general, the local fire protection regulations must be observed.
- If the AHU is part of the smoke extraction concept, then the specifications
of this concept have to be observed.
-
Otherwise, the power supply of the AHU must be interrupted immediately
at all conductors. In addition, the dampers must be closed to consequently
prevent oxygen supply and fire spread.
Exposure to harmful substances in case of fire
In case of fire, some materials can produce noxious substances. In addition,
harmful vapours can escape from the unit. Therefore, severe respiratory protective equipment is required and the danger zone has to be avoided.
Exposure to rotating parts / hot surfaces / electrocution
When working on AHU note the following risks:
Indentation of body parts in moving parts (belt drive, fan impeller, ...).
Burns and scalds on hot AHU components such as heat registers, heat exchangers, ...
Electrocution on current-carrying parts such as electric motors, frequency converters, electric heaters, control cabinets, interior lighting etc.
Therefore must be ensured prior working on the unit, that…
- all current-carrying parts, such as fan motors, valves, motors and electric heaters are discon-
nected from the power supply by using the repair switch (emergency stop) and that the switch
is locked in position 'off' in order to effectively prevent a re-activation during the work.
- the housing of the AHU interior lighting (can have separate supply) is not current-carrying.
- all moving parts, especially fan wheel, motor and heat wheel have come to a standstill; wait at
least 2 minutes after switching off before opening the doors.
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- for maintenance of frequency controlled motors, a waiting time of 15 minutes is recommended –
time to break down the residual capacitive charge of the frequency converter.
- Remove the key from doors with door lock before entering in the casing of the AHU. Keep the
key out of reach of unauthorized persons.
- Check that the hot media supply such as steam is interrupted and all the heat registers, heat
exchangers, etc. are cooled to ambient temperature.
In case of standstill of the plant (e.g. power failure), the repair switch is always to
check. Only when it is in the off position and secured against unintentional restart,
appliance doors can be opened and work on the device can be carried out.
Start of the AHU
Be ensured after working and before the start that…
- nobody is in the AHU.
- all protective devices are working, (optional safety devices such as door guard and belt guard
mounted again) and doors equipped with door locks are locked and the keys are removed –
refer to chapter 5.2 (Doors).
Storage of potential energy in gases and fluids
All heat exchangers can be operating up to a maximum pressure of 15 bar. If the
media is under higher pressures, the safety and tightness cannot be guaranteed.
Preventing the risk of explosion and fire spread
To prevent the fire spreading, fire dampers shall be installed into the ducts between the fire compartments.
Prevention of exposure caused by antifreeze agents
Avoid body contact with antifreeze agents, because they may cause burns. Wear
appropriate protective clothing (e.g. gloves, goggles, ...).
In case of fire, avoid the danger zone and meet different safeguards. It is recommended to wear a mouthguard, because of the risk of poisoning by inhaling the
vapors.
Prevention of hazards caused by steam heaters or humidifiers
By hot steam there is a danger of burns. Therefore, make sure that no steam
pressure is present and the system is cooled before working on the steam piping.
Avoid any type of ignition source when cleaning the humidifier and the associated
components and circuits by means of descaling agent. With strong descaling
agents, direct sunlight can already cause a fire.
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Avoid body contact with descaling agents, as it can cause chemical burns and serious eye damage. When handling descaling agents, wear appropriate protective
clothing (e.g. gloves, goggles, …) and ventilate the room well.
Please note the instructions on the unit and subsequent instructions exactly.
2.2.2 Refrigeration circuit
Preventing the risk of exceeding the maximum operating pressures PS
Never exceed the maximum operating pressures PS, which are specified on the
type plate (even not for test purposes). Damage may limit the security and lifetime
of the system. Never operate the refrigeration system with closed discharge line
valve.
Risk of burns on hot surfaces
On the compressor casing, pipelines and circuit components and on the oil sump
heater surface temperatures of far higher than 100 ° C may occur, which may
cause serious injuries. Wear the required personal protective equipment (protective goggles, gloves, ...)
Prevention of risks due to contact with refrigerant
Physical contact with refrigerant must be strictly avoided as it can cause severe
frostbite and damage the retina - temperature range, for example R407C at ambi-
ent pressure is approximately - 44°C!
Prevent the risk of suffocation
Safety refrigerants are odourless and tasteless, can replace oxygen in a technical
room and cause suffocation (MAK - value 1000 ppm).
- In case of refrigerant leaks leave immediately the affected room. Enter only with breathing pro-
tection or care for adequate ventilation.
- Refrigerant is heavier than air and will collect at the lowest room point. For small refrigerant
charges, this risk is significantly reduced.
- Refrigerant and compressor oil create as soon as in touch with open flame toxic substances.
Do not inhale!
- Do not smoke in the technical room!
- For more information refer to chapter 8.2.3 (Refrigerant).
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