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TABLE 1 – Operation Guide
Models HUMD300A and HUMD500A with Automatic Humidifier
Control: (Manual Humidifier Control-see pg 4)
Your Automatic Humidifier Control is installed in the cold air return.
During the first heating season, your Automatic 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
adjustments may be necessary. This is dependent upon your individual
home construction, refer to the “Operation Guide” (Table 1).
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
and blower are operating. If unit still
doesn’t operate, consult your air
conditioning and heating dealer.
Humidifier won’t shut off Turn dial to “Off.” If unit continues to
operate, consult your air conditioning
and heating dealer.
Test mode System operation is checked by setting the
knob to “Test.” Make certain furnace and
blower are operating. Humidifier will
operate for one minute.
Off
7
6
5
4
3
2
1
T
e
s
t
N
O
R
M
A
L
Humidity Level
The relative humidity in your home
will now be accurately controlled
to meet your needs and should not
need further adjustment during
future heating seasons. Make note
of the dial setting in the event you
temporarily move the knob when
performing annual maintenance of
the Humidifier.
II. OPERATING INSTRUCTIONS
FIGURE A