Installation & Maintenance Manual
28
HUMIDIFIER CONTINUOUSLY FILLS AND DRAINS WITHOUT PRODUCING STEAM:
Causes:
1. Mineral has bridged between the electrodes.
2. There is back pressure from the steam hoses or duct.
3. The flow regulator in the fill valve is broken or out of place.
4. Water conductivity is very high.
5. Water is foaming excessively.
Remedies:
1. Clean or replace the cylinder.
2. Check the steam hoses for kinks or gullys that might be trapping condensate.
3. Replace the fill valve.
4. Consider using a mix of demineralized water with raw water.
5. Check cylinder - replace if exhausted. If feed water contains silica or nitrates, install a 1 micron water filter.
THE SELECTED QUANTITY OF STEAM IS NOT PRODUCED:
Causes:
1. Water conductivity is very low.
Remedies:
1. Wait to see if unit corrects by concentrating minerals. Add some Alka-Seltzer or salt to assist. Replace
cylinder with special low conductivity model (call factory).
EXTERNAL FUSES/BREAKERS BLOW:
Causes:
1. Fuses/breakers are undersized or faulty.
2. Short in wiring to the unit.
Remedies:
1. Replace fuses/breakers.
2. Check all wiring and test for continuity to ground.
3. Check fuse sizing.
WETTING OF DUCTS:
Causes:
1. Duct steam distributor pipes are improperly installed or are not level.
2. Steam hoses and/or condensate hoses are kinked or have gullies.
3. Humidifier is oversized.
4. Humidifier is operating when there is no air flow in the ducts.
5. Air stream cannot hold required level of water vapor.
Remedies:
1. Check installation of pipes and correct.
2. Check the steam and condensate hoses for kinks or gullys that might be trapping condensate.
3. Reduce the maximum steam production on the humidifier. Install a hi-limit humidistat downstream of the
distributor pipes.
4. Install an air flow switch in the duct to prove air flow and wire across terminals 20-21 in unit.
5. Increase airflow.
WATER LEAKS OUT OF BOTTOM OF HUMIDIFIER:
Causes:
1. The drain of the humidifier is obstructed.
2. The fill valve is leaking.
3. The overflow hoses from the fill cup and/or RDU are outside of the drain pan.
4. The steam hose is not properly connected to the top of the steam cylinder.
Remedies:
1. Clean the drain valve and piping. Make sure it connects to an open drain.
2. Clean or replace the fill valve.
3. Check that the overflow hoses are in the drain pan and reposition if necessary.
4. Check that the hose clamp is tight on the top of the cylinder. If it has been overtightened, the plastic outlet
of the cylinder may be damaged and need to be replaced.
5. Check if drain pan has been cracked at drain fitting. If a metal drain fitting was used, replace the pan. Then
replace the metal fitting with a CPVC fitting and Teflon thread sealant ONLY (do not use thread tape).
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