
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
• Ambient temperature + 4°C ~ + 38°C (40°F to 100°F)
• Humidity = 50 % at 40°C (104°F), = 90 % at 20°C (68°F)
• Altitude = 1000 m (above mean sea level) (3300 ft)
5. Transportation and storage conditions
Electrical equipment shall be designed to withstand, or suitable precautions shall be taken to protect against, the
effects of transportation and storage temperatures within a range of -25°C to + 55°C (-15°F to 130°F) and for
short periods not exceeding 24h, up to +70°C (160°F). Suitable means shall be provided to prevent damage from
humidity, vibration and shock.
6. Requirements
The supply disconnecting device (i.e. a switch-disconnect, a disconnect used in combination with switching devices,
or a circuit-breaker) shall fulfill all of the following requirements:
• Isolate the electrical equipment from the supply and have one OFF (isolated) and one ON position only, clearly
marked with “O” and “I” (symbols 60417-2-IEC-5008 and 60417-2-IEC-5007, see 10.2.2), with the actuating
directions in accordance with IEC60447. Circuit-breaker that, in addition, has a reset (tripped) position between
“O” and “I” are also deemed to satisfy this requirement.
• Have a visible gap or a position indicator which cannot indicate OFF (isolated) until all contacts are actually
open and there is an adequate isolating distance between all the contacts in accordance with IEC 60947-3.
• Be provided with a means permitting it to be locked in the OFF (isolated) position (e.g. by padlocks). When
locked, remote as well as local closing shall be prevented.
• Disconnect all live conductors of its power supply circuit. However, for TN supply systems, the neutral
conductor may or may not be disconnected. It is noted that in some countries, disconnection of the neutral
conductor (when used) is compulsory.
• The handle of the supply-disconnecting switch shall be located between 0.6m and 1.7m (2 ft. and 5-1/2 ft)
above the servicing level.
• The disconnecting switch must have over current and overload protecting functions and initialize them as low
as possible under normal running.
• The disconnecting switch should have a breaking capacity sufficient to interrupt the largest normal running
current of loads. The breaking capacity required should be selected according to the table on page 8.