600 &700 Manuals


II. OPERATING INSTRUCTIONS
There are 2 possible modes of operation of your Aprilaire Humidifier
Control and an explanation of both modes follows:

Automatic Mode:
(Manual Mode-see pg 5)

Your  Aprilaire  Humidifier  Control  is  installed  in  the  cold  air  return.
During the first heating season, your Humidifier Control needs to
be set initially to match your home’s condition. Please follow these
steps when adjusting your control (refer to Figure A).

1. Turn  the  dial  setting  knob  to  “5,”  which  is  within  the  normal  range.
During the next 24-48 hours it may be necessary to adjust the dial for
more  or  less  humidity,  depending  on  your  personal  comfort  and
home’s requirements. Refer to the “Operation Guide” (Table 1).
2. During  the  coldest  portion  of  the  first  heating  season,  minor
(Table 1) Operation Guide
Condition
Solution
Condensation on windows
Reduce the setting on the control dial 
by 1 increment.
Lack of humidity
Increase the setting on the control dial 
by 1 increment.
Humidifier does not operate
Turn dial to “Test.” Make certain furnace
blower is operating and furnace is calling 
for heat. If unit still doesn’t operate, consult
a heating contractor.
Humidifier won’t shut off
Turn dial to “Off.” If unit continues to 
operate, consult a heating contractor.
Test mode
System operation is checked by setting the
knob to “Test.” Make certain furnace blower
is operating and furnace is calling for heat.
Humidifier will operate for one minute.
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