Operator`s manual
(©July, 2008)
CeilAiR OHS Series Installation, Operation & Maintenance Manual
A
ir Technology Systems, Inc.
4-8
NOTE
Decrease the humidity setpoint below ambient
humidity to allow the cylinder to cool down be-
fore removing the cylinder.
1. Turn off water supply to the humidifier.
2. Drain the cylinder by pushing the “Auto/On-Off/
Drain” switch to the “Drain” position.
3. When drained, push the “Auto/On-Off/Drain”
switch to the “Off” position.
4. Disconnect power at the main power disconnect
switch.
5. The power wires to the cylinder are attached by
cylinder plugs to the electrode pins on top of the
cylinder. Pull these plugs vertically off the pins.
CAUTION
The cylinder and steam hose may be hot and
burns may result.
6. Loosen the steam hose clamp(s) and pull the
steam hose off vertically.
7. Lift the cylinder straight up to disengage it from
the humidifier.
8. Place the new cylinder on the side mounting slots
within the unit, ensuring the cylinder mounting
stubs are seated properly.
9. Replace the cylinder plugs on the pins, ensuring
the white sensor plug goes on the single pin,
which is offset from the others.
10. Ensure the plugs are secured on the pins. If the
plugs are loose, they may be temporarily
squeezed together, however the plugs must be
replaced since a loose plug could generate
enough heat to melt and destroy the plug.
11. Replace the steam hose and tighten the clamp(s).
12. Turn on main power at the main power disconnect
switch.
13. Push the “Auto/On-Off/Drain” switch to the “Auto/
On” position.
14. Turn on the water supply to the humidifier.
15. Readjust the humidity setpoint.
If the humidifier is to be shut down for an extended
period, always drain the cylinder first. Follow the
above steps (1 through 4) ensuring the “Auto/On-Off/
Drain” switch is in the “Off” position. Failure to do this
will drastically shorten the cylinder life.
4.3.4.5 Filter Replacement
The filters are located either internal or external to the
cabinet depending on the configuration of the unit.
Regardless of location, the filter is accessed through
an access panel, which is labeled "FILTER ACCESS".
Remove access panel and old filter. Ensuring direc-
tional airflow arrows on filter are correct, insert new
filter and replace the access panel.