Checkout Procedures; Troubleshooting - Honeywell HE420A Manual

HE420A,B AND HE460A,B STEAM POWER HUMIDIFIERS
IMPORTANT
• Replace the float valve when it shows any signs of
deterioration.
• The float valve should shut off the water at 2-3/8 in.
(60 mm).
11. Reset the water level:
CAUTION
Flooding Hazard.
Inadequate support of the float arm can lead to
valve seat damage resulting in water leakage.
Support the float arm during adjustment.
a. Set the humidifier reservoir on a level surface.
b. Attach the water feed line and allow the unit to fill
until the float valve shuts off the incoming flow of
water. The water level should be between
2-1/4 in. (57 mm) and 2-1/2 in. (64 mm) deep. If
water level is correct, go to step d.
c. Adjust the water level in small increments. Raise
the water level by pushing down on the center of
the float arm. Lower the water level by pressing
the float down with one hand and pulling up on
the center of the float arm with the other hand.
See Fig. 9.
d. Verify the water level by removing enough water
to allow the float valve to automatically fill and
shut off the water.
12. Remount the humidifier.
13. Reconnect all plumbing connections.
14. Reconnect all electrical connections.
15. Verify humidifier operation by following the steps in the
Checkout Procedures section.
End of Humidification Season
Clean and shut off the humidifier at the end of the heating
season. Use the Every 1 To 4 Months section, steps 1
through 14, to shut down for the season.

TROUBLESHOOTING

Refer to Table 4 for troubleshooting procedures.
Problem
Low humidity
High humidity
68-0192—2
IMPORTANT
Vacation
When you leave on vacation, turn off the humidifier water
supply and the humidity control. When you return, turn on
the humidifier water supply and reset the humidity control to
restart the humidifier.

CHECKOUT PROCEDURES

After winter start-up or maintenance, use the following
procedure to check humidifier operation:
NOTE: The H1008A Automatic Humidity control stays in
Table. 4. Troubleshooting Procedures.
What To Look For
Furnace blower not operating.
Rapid air changes. Drafts (cold air
is dry and is an added load for the
humidifier).
Condensation on walls.
Heavy condensation on windows.
10
Be sure the humidifier power is off and there is no
water in the humidifier.
1. Turn on the humidifier water supply.
2. Be sure the humidifier has power and plug in the
humidifier.
3. Turn the Convertible Humidity Control to the highest
setting, or the H1008 Automatic Humidity Control to
the Test position.
the test mode for thirty minutes. After thirty minutes,
the control automatically resets to the maximum
frost factor setting. If system checkout was not
completed in thirty minutes, extend the test mode
by turning the dial back to one of the dial settings
and then returning it to the test mode.
4. Check that the furnace blower turns on to circulate the
moist air. The blower may take as long as fifteen
minutes to turn on.
5. Reset the Convertible Humidity Control to a
comfortable setting, and the Automatic Humidity
Control to the desired frost factor setting for automatic
operation.
What To Do
• Reset circuit breaker or check for blown
fuse.
• Check that the furnace power is on.
• Check all external wiring connections.
• Check the humidity control setting.
• Call a professional heating contractor.
• Keep doors and windows closed.
• Close fireplace damper when not in use.
• Keep exhaust fan running time to a minimum.
• Seal around doors and windows.
• Turn off humidity control and water until
condensation is completely evaporated.
• Turn humidity control down low enough to
eliminate condensation caused by moisture
from bathing, mopping, cooking, etc. If
moisture persists, more ventilation is needed.