
4Designs, materials, weights and performance ratings are approximate and subject to
change without notice. Visit armstronginternational.com for up-to-date information.
Warning: Do not operate the supplied humidifier in combustible or explosive surroundings.
Warning: Do not operate the supplied humidifier if there is any damage to the cabinet or any components in humidifier
are damaged.
Warning: The main switch should be a connection breaker which has over current and leakage current protecting
functions per code EN60947-3 or EN60947-2 if point gap required by EN60947-3 can be fulfilled.
4. Physical environment and operating conditions
•Ambienttemperature+4°C~+38°C(40°Fto100°F)
•Humidity=50%at40°C(104°F),=90%at20°C(68°F)
•Altitude=1000m(abovemeansealevel)(3300ft)
5. Transportation and storage conditions
Electrical equipment shall be designed to withstand, or suitable precautions shall be taken to protect against, the
effectsoftransportationandstoragetemperatureswithinarangeof-25°Cto+55°C(-15°Fto130°F)andfor
shortperiodsnotexceeding24h,upto+70°C(160°F).Suitablemeansshallbeprovidedtopreventdamagefrom
humidity, vibration and shock.
6. Requirements
Thesupplydisconnectingdevice(i.e.aswitch-disconnect,adisconnectusedincombinationwithswitchingdevices,
oracircuit-breaker)shallfulfillallofthefollowingrequirements:
•IsolatetheelectricalequipmentfromthesupplyandhaveoneOFF(isolated)andoneONpositiononly,clearly
markedwith“O”and“I”(symbols60417-2-IEC-5008and60417-2-IEC-5007,see10.2.2),withtheactuating
directionsinaccordancewithIEC60447.Circuit-breakerthat,inaddition,hasareset(tripped)positionbetween
“O” and “I” are also deemed to satisfy this requirement.
•HaveavisiblegaporapositionindicatorwhichcannotindicateOFF(isolated)untilallcontactsareactually
open and there is an adequate isolating distance between all the contacts in accordance with IEC 60947-3.
•BeprovidedwithameanspermittingittobelockedintheOFF(isolated)position(e.g.bypadlocks).When
locked, remote as well as local closing shall be prevented.
•Disconnectallliveconductorsofitspowersupplycircuit.However,forTNsupplysystems,theneutral
conductor may or may not be disconnected. It is noted that in some countries, disconnection of the neutral
conductor(whenused)iscompulsory.
•Thehandleofthesupply-disconnectingswitchshallbelocatedbetween0.6mand1.7m(2ft.and5-1/2ft)
above the servicing level.
•Thedisconnectingswitchmusthaveovercurrentandoverloadprotectingfunctionsandinitializethemaslow
as possible under normal running.
•Thedisconnectingswitchshouldhaveabreakingcapacitysufficienttointerruptthelargestnormalrunning
currentofloads.Thebreakingcapacityrequiredshouldbeselectedaccordingtothetableonpage8.