Humidifier Control - Aprilaire 700M Reference Manual

Humidifier Control

RECOMMENDED INDOOR
HUMIDITY LEVELS
Outdoor
Temperature (˚F)
+40
+30
+20
+10
0
-10
-20
The newest generation of Aprilaire humidifiers automatically adjusts up to 45 times per day based on outdoor temperatures and
indoor humidity levels to provide the optimum indoor RH.
continually monitors and responds to both outdoor temperatures and indoor relative humidity, delivering optimum levels of humidity
throughout the home. There is no need to monitor the settings or wait until they feel uncomfortable. The automatic set-it-and-
forget-it control keeps the home's humidity level where they want it.
Digital Control:
Digital control provides more accuracy and information.
Know your relative humidity.
Backlit display provides the current humidity level in the home.
Know when the system is running.
The green light clearly shows that the humidifier is up,
running and protecting the home, comfort and health.
Know when to replace the water panel.
The "smart" feature measures usage of the water panel,
and indicates when it's time for replacement.
Know immediately when service is needed.
The red light indicates that service is needed, while the digital display provides the
service code that the contractor can use to isolate the cause, saving time and money.
What Indoor Relative Humidity is Correct?
While some humidity conditions may be ideal for comfort, these conditions
are, in many cases, less than ideal for other reasons. An indoor RH of
60% may fulfill all the requirements for comfort, but it can result in damage
Recommended
to walls, to furnishings, etc. The fogging of windows is usually an
Humidity (%)
indication of too-high RH and it must be remembered that this same
45%
condensation could be taking place inside walls and other places
40%
vulnerable to damage by excessive moisture.
35%
30%
It is, therefore, necessary to set safe limits of indoor RH levels to
25%
receive the maximum benefits from correct humidification, without making
20%
the structure itself susceptible to damage. The table shows the
15%
recommended indoor RH based on outdoor temperatures to ensure
these benefits.
Continuous automatic control – 24/7:
Aprilaire humidifiers feature the Aprilaire Automatic Humidifier Control. This system
monitors the outdoor temperature and automatically adjusts the humidifier so that it
provides the optimum RH level to the home. This set-it-and-forget-it control allows
the humidifier to always provide the optimum humidity level and can provide up to
50% more moisture than other humidifiers.
The optimum levels of relative humidity in the home fluctuate with the change in
outdoor temperature. An Aprilaire automatic humidifier, evaporative or steam,
Blower activation on/off.
Blower activation "on" will turn the HVAC blower on
for humidification, "off" will run only during a heat call.