Specifications

44
5.8 Installationofcontrolandmonitoringdevices
– Install the roomhumiditysensorand the safetyhumidistatat the same height as thermostats
andinalocationwherethemeasuredhumiditycorrespondstothatoftheroom.Undernocir-
cumstancesshouldthehumiditysensorsbepositionedinthevicinityoftheairowfromventila-
torunitsorairintakegrids.Donotmounthumiditysensorsonanouterwall,wheretemperature
uctuationscanaffectthecontrolbehavior.
– Installtheducthumiditysensorinapositionwherethemeasuredhumiditycorrespondstothat
oftheroomthatisbeinghumidied(usuallyintheductreturncircuit).Donotpositionhumidity
sensors in the immediate vicinity of steam distribution pipes, nor in sections of a duct subject to
airturbulence,norwithinthepathofthehumidicationprocessitself.
– Installthesafetyhumidistatintheduct,afterthesteamdistributionpipesandfarenoughaway
from these, that all the steam has been absorbed into the air (minimum distance 3 m). The safety
humidistatmustbepositionedsuchthatitonlydetectsthatthehumidityistoohighwhentheroom
humidity is in reality too high or has reached the saturation limit.
– Installtheowmonitorsuchthatreliablydetectstheexistenceofanairowandtheabsenceof
anairow.Connectitinsuchaway,thatthecircuitisclosedwhenairowispresentandopens
whenthereisnoairow.
– Beforestartingthehumidier,checkallcontrolandmonitoringdevicesforcorrectfunction.
– Calibrationofthecontrolandmonitoringdevices(On/Offandcontinuous)followingtheinstallation
isrecommended.Theaccuracyofthehumiditysensorandthesafetyhumidistatmustalwaysbe
checkedbeforecommissioningthehumidiersystem.
Terminallocations
When locating the airintake and the ue gasterminals the following requirements must be ob-
served:
– All terminal must terminate at an outside location.
– Locationofairintakeanduegasterminalmustcomplywithalllocalandnationalregulations.
– Airintakeanduegasterminalcanbeinstalledindifferentpressurezones.
– Airintakeanduegasterminalcannotbeinstalledonoppositewallsofthebuilding.
– Aminimumdistanceof1.2mmustbemaintainedbetweentheairintakeandtheuegasterminal
topreventrecirculationofuegases(seegureabove).
– Whentheuegasorairintaketerminalislocatedlessthan2.75mfromthegroundorcanbe
accessed by personnel a guard must be installed at a minimum distance of 50 mm to the terminal
to prevent personal injury.