BLOwER ACTIVATION
The blower Activation feature provided with the Model 63 ADMC turns the
HVAC system fan on when there is a call for humidity .
AUTOMATIC MODE
During the first heating season, your ADMC needs to be set to match
your home's condition . The ADMC default set point is 40% RH . Follow
these steps when adjusting your control .
1 . For the first 24-48 hours of operation, it may be necessary to adjust the
set point for more or less humidity, depending on your personal comfort
and home's requirements . Refer to Table 6 – ADMC Operation guide .
2 . During the coldest portion of the first heating season, minor adjustments
may be necessary . This is dependent on your home's construction . Refer
to Table 6 – ADMC Operation guide .
TABLE 6 – ADMC Operation guide
Condensation on
Reduce the setting on the control by 5% .
windows.
Lack of humidity.
Increase the setting on the control by 5% .
Humidifier does
Check that set point is higher than sensed humidity .
not turn on.
Make certain HVAC blower is operating and humidifier is
On . If humidifier still does not operate consult a heating
contractor .
Humidifier won't
Turn ADMC Off . If humidifier continues to produce steam
shut off.
(humidifier steam light On), disconnect main power to
turn off the humidifier and consult a heating contractor .
"OFF", "– – –"
The humidity sensor is not connected or is short circuited .
and alarm symbol
Consult a heating contractor .
are displayed.
"– – –" is
The temperature sensor is not connected or is short
displayed.
circuited . Consult a heating contractor .
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The humidity in your home will
now be accurately controlled
to meet your needs and should
not need further adjustment
during future heating seasons .
The Aprilaire ADMC measures
outdoor temperature and
automatically adjusts the set
point to prevent condensation
and damage . Table 7 shows the
maximum Humidistat set point
the ADMC will allow for various
outdoor temperatures .
MANUAL MODE
If an outdoor temperature
sensor cannot be installed or the
application requires a specific
RH set point, the ADMC can be
configured to Manual Mode . In
Manual Mode, the humidifier
and control will maintain a
constant RH, regardless of
outdoor temperature .
It is important to anticipate a
drop in outdoor temperature
and reduce the setting
accordingly to avoid excessive
condensation . See Table 8 for
the recommended settings . These settings are based on years of research,
represent a compromise between humidity levels that would be most
desirable for comfort and humidity levels that are suitable for protection
of your home and to avoid condensation on your windows . For example, a
wintertime indoor humidity of 50% may be considered ideal for comfort, but
unfortunately, it probably would result in condensation, which can cause
damage to your home . Observing the recommended humidity levels on your
ADMC is an important safeguard . Condensation of water on the inside
surface of windows in the form of fogging or frost is usually an indication
of too much humidity . This same condensation can occur in other areas in
your home, possibly resulting in damage .
TABLE 7 – ADMC Maximum Set Point
for Outdoor Temperature
Outdoor
Maximum
Temperature
Setpoint
°F (°C)
(%RH)
20 (-7)
35%
10 (-12)
30%
0 (-18)
25%
-10 (-23)
20%
-20 (-29)
15%
TABLE 8 – Outdoor Temperature and
Recommended Indoor RH Setting
Outdoor
Recommended
Temperature
Indoor RH Setting
+40°F
45%
+30°F
40%
+20°F
35%
+10°F
30%
0°F
25%
-10°F
20%
-20°F
15%
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