TROUBLESHOOTING GUIDE (CONTINUED)
TABLE 6 – Humidifier Troubleshooting Guide (continued)
Problem Possible Cause Action
Humidifier makes gurgling
sound.
Excess condensation in steam hose. Install Tee and Trap Model 5628RP as shown in Figure 5.
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.
Unless the unit is operating on softened water, switch to the Model
8043LCRP canister if currently using the Model 8043RP 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.
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