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TROUBLESHOOTING GUIDE
TABLE 6 – Troubleshooting Guide (continued)
Problem
Possible Cause
Humidifier makes gurgling
Excess condensation in steam hose .
sound .
Fill valve makes banging
Water hammer from line pressure .
sound .
Humidifier will not fill .
Saddle valve not open or pipe not
pierced .
Hoses are blocked .
Humidifier will not drain .
Debris in drain valve blocking outlet port .
Water in duct from dispersion
Dispersion tube installed incorrectly .
tube .
Impurities in steam hose or pipe causing
foaming .
Service light flashing red
Canister full of mineral deposits .
before end of humidification
season .
Humidifier runs in short cycles (does not
reach capacity) .
Yellow Steam light .
Humidifier operating below rated
capacity . (Normal operation for systems
plumbed to low conductivity water and
systems that operate for short cycles .)
Humidifier is not satisfying
Control setting is too low .
demand .
Control mounted in wrong location .
Short run times .
Humidifier capacity limited by input
power (120V) .
Excess humidity .
Control setting is too high .
Control mounted in wrong location .
Solid red Fill light .
Fill valve has been filling for 40 minutes .
High static pressure in the duct is causing
back pressure in the duct .
Low spot in steam hose collecting water .
Solid red Service light .
Unit senses current 120% above nominal
and cannot lower amperage after three
drain cycles .
(CONTINUED)
Action
Make sure steam hose has constant downward slope to humidifier or to tees
and traps in low spots of hose .
If hard pipe is used for dispersion system, make sure it is insulated .
Make sure water supply line does not contact ductwork .
Install shock arrestor .
Install section of 1/4" braided fill line . Conform to local codes .
If water supply pressure is greater than 120 psi, install pressure reducer .
Make sure saddle valve is properly installed and the valve is open .
Check internal hoses and eliminate kinks or blockage .
Remove canister and clean debris from drain valve .
Install dispersion tube with tublets facing straight up .
Rinse canister, fill hose and fill cup with clean water .
Remove canister and rinse with clean water .
Plumb humidifier to filtered water .
Plumb humidifier to softened water .
Use Blower Activation Relay Part #5387 (provided) or run constant HVAC fan .
Plumb humidifier to softened water .
Use Blower Activation Relay Part #5387 (provided) or run constant HVAC fan .
Operate humidifier on 208/240 volts .
To determine operating current, attach clamp-on ammeter to one of the
electrode wires on top of canister .
Dissolve one tablespoon of salt into one cup of hot water . Add to the fill cup in
1/4 cup increments until unit operates properly . Yellow Steam light will clear
after first fill valve cycle at nominal amperage operation . Do not over salt .
System will drain and refill with clean water due to over current fault .
Adjust control to higher setting .
See Installation Instructions with control for correct mounting location .
Use Blower Activation Relay Part #5387 (provided) or run constant HVAC fan .
Operate humidifier on 208/240 volts .
Increase capacity to 16 .0 amps . Make sure breaker is appropriately sized .
Adjust control to lower setting .
See Installation Instructions with control for correct mounting location .
Make sure high water pin electrode wire is securely installed .
Make sure dispersion tube is not discharging into a duct with greater than 2 .0
in .wg . static pressure .
Make sure dispersion tube tubelets are pointed up .
Support steam hose along its length ensuring 2" per foot slope from the
dispersion tube to the humidifier .
Rinse canister to remove mineral deposits or install a new canister .
23
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