North America • Latin America • India • Europe / Middle East / Africa • China • Pacific Rim
armstrong
international.com
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
armstrong
international.com for up-to-date information.
40
Maintenance
Recommended maintenance and precaution
Routine Service
• After the humidifier has run for about one hour time, check for any water leakage at the cylinder gasket and at the
drain valve.
• The cylinder should be inspected after about 50 hours of run. Make sure there is no arching between the electrodes
when the unit is in operation. As well, when switched off, all the contactor screws and the steam drain and internal
hose clamps should be retightened.
• A complete inspection of all the humidifier hoses should be made after one year of operation.
• Any faulty or damaged hose must be replaced to prevent leakage.
Warnings
When the humidifier is used for a long time or operates with very conductive water, solid deposits built-up on the electrode
plates which can make the water even more conductive.
If electrical arcs can be seen inside the steam cylinder, the humidifier doesn’t operate properly.
Switch off the humidifier immediately This arcing involves:
• Excessively heat on the plastic shells that can eventually make the material melt and make a hole from where scald-
ing water can escape.
• Circuit breaking caused by excessive intensity.
• Faster corrosion of the electrode plates.
• Burning of the electrode power cables.
Points to check in case of arcing
• Ensure that the drain valve works properly and clean it up.
• Ensure that the F3 drain valve fuse is still in order.
Caution
Always isolate all electrical and water supplies to the humidifier before commencing any maintenance and refer to the
instructions given in this manual. The EHU humidifier includes live electrical components and the steam cylinder contains
boiling water. All maintenance must only be carried out by skilled and qualified personnel.
