Minimum Limit Value Reduction And Pi Settings; Standstill And Disposal - Helios AIR1-SM DX Installation And Operating Instructions Manual

Installation and Operating Instructions
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NOTE
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DANGER
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Control module AIR1-SM DX

2711 Minimum limit value reduction and PI settings

The control module DX can be used to optimise the control of the change-over register DX by lowering the supply air
temperature lower limit, provided a room temp. cascade or extract air temp. cascade control is used.This results in
the quieter, continuous operation of the cooling systems.
The set reduction of the limit value is only activated when DX cooling is active!
The reduction is not active for cold water cooling, heating or when the cooling requirement is deactivated.
The standard setting for this function is a reduction of 5 °C. This value can be adjusted under Configuration → Cooling
→ "Reduction of minimum supply air temp. limit when DX cooling is active". We recommend adjusting the neutral
zone under Temperature → Supply air temperature → Neutrale zone to a value between +2 and + 5°C. Login as
Administrator required.
The control mode can also be tuned by setting the PI value. The P-band and I-time can be set for this purpose.
P-band control stands for proportional control over a defined range (band). A small P-band results in a rapid response
to a certain change, whereas a larger P-band results in a slower response to the same change.
The I-time is defined as the time required to amplify the output signal by the same value of the P-band.
A small I-time results in a rapid increase in the output signal (depending on P-value), whereas a larger I-time results in
a slower increase in the output signal to the same difference.
If the P-band and I-time presets need to be changed, please contact our customer service team for more information.
The P-band and I-time define the behaviour of the entire temperature controller. This means that the heating, heat
recovery and cooling will be set to the same values. A change in the P-band/I-time not only changes the cooling cont-
rol mode, but also the heating control mode.
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Standstill and disposal

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Danger to life due to electric shock!
When dismantling, live parts can be exposed, which can result in electric shock if touched Before dismant-
ling, isolate the unit from the mains power supply and protect against being switching on again! Danger of
electric shock, moving parts (fans) and potentially hot surfaces of optional auxiliary heating registers
Parts and components of the fan, whose service life has expired, e.g. due to wear and tear, corrosion, mechanical
load, fatigue and/or other effects that cannot be directly discerned, must be disposed of expertly and properly after
dis-assembly in accordance with the national and international laws and regulations. The same also applies to auxiliary
materials in use. Such as oils and greases or other substances. The intended and unintended further use of worn parts,
e.g. impellers, rolling bearings, filters, etc. can result in danger to persons, the environment as well as machines and
systems. The corresponding operator guidelines applicable on-site must be observed and used.
Please think of the environment, you can make a significant contribution to the environmental protection by returning
batteries and accumulators!
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