TRoUbleSHooTInG GUIDe
(ConTInUeD)
Table 6 – Troubleshooting Guide (continued)
Problem
Possible Cause
action
Humidifier makes gurgling
sound .
Excess condensation in steam hose .
Install Tee and Trap Model 4028 as shown in
figure 10
.
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 .
Fill valve makes banging
sound .
Water hammer from line pressure .
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 .
Humidifier will not fill .
Saddle valve not open or pipe not pierced .
Make sure saddle valve is properly installed and the valve is open .
Hoses are blocked .
Check internal hoses and eliminate kinks or blockage .
Humidifier will not drain .
Debris in drain valve blocking outlet port .
Remove canister and clean debris from drain valve .
Water in duct .
Dispersion tube installed incorrectly .
Install dispersion tube with tublets facing straight up .
Impurities in steam hose or pipe causing foaming .
Rinse canister, fill hose and fill cup with clean water .
Insufficient absorption distance .
Determine absorption distance per
Table 3
.
Service light flashing
red before end of
humidification season .
Canister full of mineral deposits .
Remove canister and rinse with clean water .
Plumb humidifier to filtered water .
Plumb humidifier to softened water .
Humidifier runs in short cycles (does not reach
capacity) .
Use blower activation feature on ADHC or run constant HVAC fan .
Allowing the humidifier to run for longer cycles to concentrate minerals
and increase water conductivity .
Yellow steam light .
Humidifier operating below rated capacity . (Normal
operation for systems plumbed to low conductivity
water and systems that operate for short cycles .)
Plumb humidifier to softened water .
Use blower activation feature on ADHC 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 teaspoon 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 .
Humidifier is not
satisfying demand .
Control setting is too low .
Adjust control to higher setting .
Control mounted in wrong location .
See Installation Instructions with control for correct mounting location .
Short run times .
Use blower activation feature on ADHC or run constant HVAC fan .
Humidifier capacity limited by input power (120V) .
Operate humidifier on 208/240 volts .
Increase capacity to 16 .0 amps . Make sure breaker is appropriately sized .
Excess humidity .
Control setting is too high .
Adjust control to lower setting .
Control mounted in wrong location .
See Installation Instructions with control for correct mounting location .
Solid red fill light .
Fill valve has been filling for 40 minutes .
Make sure high water pin wire is securely installed .
Low spot in steam hose collecting water .
Support steam hose along its length ensuring 2” per foot slope from the
dispersion tube to the humidifier .
High static pressure in the duct is causing back
pressure in the duct .
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 .
Solid red service light .
Unit senses current 120% above nominal and
cannot lower amperage after three drain cycles .
Rinse canister to remove mineral deposits or install a new canister .
29
