Specifications

TABLE 3 – Sequence of operation for Model 1160 and 1180 (continued)
Operation Expected Results
If demand for humidity prevents the chamber from cooling,
a forced Autodrain sequence is initiated. During a forced
Autodrain sequence, the humidifier will not generate steam,
even if there is a call for humidity.
• The humidifier will go into a forced cool-down period, which lasts about 6 hours for
Model 1160 and 7 hours for Model 1180. During that time, all the LEDs will blink in
sequence.
• After the forced cool down period, the Fill LED will turn on – the Fill valve will open,
water will flow into chamber until it reaches the upper probe.
• Drain LED will turn on and the drain valve will open allowing water to flow from the
bottom of the chamber.
• The drain valve will remain open for 12 minutes after the water level in the chamber
drops below the lower probe
• The Fill LED will turn on and the Fill valve will open.
• When the water in the chamber reaches the lower probe, if there is a demand for
humidity, the heating element will be energized·
• The Fill valve will remain open until the water in the chamber reaches the upper probe,
at which point the fill valve will close and the Fill LED will turn off.
End of season drain.
• After 72 hours of no demand for humidity, the Drain LED will turn on and the drain
valve will remain open for 10 hours.
• After 10 hours, the Drain LED will turn off and the Drain valve will close.
• The chamber will remain empty until there is a demand for humidity.
DISPLAY PANEL AND INDICATOR LIGHTS
The display panel shows operating status and troubleshooting information. See the display panel detail (Figure 6) and the table
describing display panel lights (Table 4). For more information about blinking indicator lights, see the troubleshooting section in
this manual.
OM-2028-M
On/Off
switch
Indicator
light
Steam
Fill Drain On/Off
FIGURE 6 – Display Panel
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