Helios AIR1-CO DX-Serie Montage- Und Betriebsvorschrift Seite 41

Installation and Operating Instructions
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Change-over-unit AIR1-CO DX
The accessory AIR1-SM DX - control module DX is not acquired for ventilation units in series XVP and XHP� The
necessary connections are already available on the terminal board of the units�
2�2 Receipt
The delivery consists of the change-over-unit DX incl. mounting material�
Please check delivery immediately on receipt for accuracy and damage. If damaged, please notify the carrier immedia-
tely. In case of delayed notification, any possible claim may be void.
2�3 Storage
When storing for a prolonged time, the following steps are to be taken to avoid damaging influences:
Protection by dry, airtight and dust-proof packaging (plastic bag with desiccant and humidity indicators). The storage
place must be waterproof, vibration-free and free of temperature variations. Damages due to improper transportation,
storage or commissioning must be verified and are not liable for warranty.
2�4 Shipping
The shipping must be carried out carefully. It is recommended to leave the unit in the original packaging until installation
to avoid possible damages and contamination.
The shipping must be carried out by trained and experienced personnel and the necessary safety precautions should
be taken to prevent overturning and slipping of the device. it should be ensured that the weight is evenly distributed
when shipping the unit.
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Personal injury and/or material damage due to incorrect shipping!
It must be ensured that the means of transport/lifting is suitable to accommodate to the required weight and
size capacity�
– Make sure that the unit is firmly seated before lifting it.
Material damage due to excessive load!
Before off-loading the units, please ensure that the means of transport/lifting have sufficient capacity for the
required weight�
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Risk of personal injury and material damage!
The package units may have an eccentric centre of gravity� If the package unit is incorrectly lifted, it can tip
over� Falling or tipping package units can cause serious personal injury�
When lifting, the centre of gravity of the package unit must be vertically beneath the crane hook�
2�5 Disassembly and re-assembly
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Danger to life due to electric shock!
An electric shock can result in death or serious injury�
– Ensure that the unit is voltage-free and isolated from the mains power supply. Ground and short circuit the unit, shield
neighbouring live components.
– The unit must be isolated from the mains power supply before disassembly or re-assembly.
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Risk of personal injury and material damage!
The disassembly and re-assembly of the unit are not part of routine maintenance�
– The disassembly and re-assembly of the unit may only be carried out by qualified specialist personnel.
Risk of material damage when installing change-over-units DX!
The following must be taken into account when installing change-over-units DX:
– Close all hydraulic stop valves.
– Isolate all connections and ensure that the unit is leak-free with regard to water.
– Since the diameter of the cooling pipes is small, water may remain in the register after emptying. For safety reasons,
compressed air should be blown through the system to remove the remaining water.
2�6 Mechanical assembly
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Danger to life due to electric shock
The installation and connection of the unit may only be carried out by qualified specialist personnel. The electrical con-
nections must be carried out by a person who has proper professional training and experience in the relevant accident
prevention regulations, as well as other generally recognised safety and occupational health codes, with authorisation
to perform work on the unit.
Risk of injury due to electric shock, hot surfaces and potentially hot surface of optional auxiliary heater�
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Danger to life due to electric shock
The unit must be fully isolated from the mains power supply before all maintenance and installation work and
opening the terminal compartment! The electrical connections must be carried out in accordance with the fol-
lowing wiring diagrams and must only be carried out by qualified electricians� The electrical connection must
be fully isolated until the final assembly!
– Make sure that the coolant lines are installed and insulated properly�
– Observe the wiring diagrams for the change-over-unit DX signal connections�
– The air ducts behind the change-over-unit DX must be insulated�
The change-over-unit DX contain nitrogen ex works with a pressure of 1 bar� Check the pressure prior to
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