Aprilaire 800 Series - Operating Modes

DISPLAY PANEL
TABLE 1 – DISPLAY PANEL
Indicator Light Function
Off
Humidifier is turned OFF or not receiving power.
Solid
Green
Humidifier is turned ON.
Flashing
Green
Humidifier is preparing to turn ON. Occurs if power is disconnected,
then restored with switch ON. Flashes for 1 minute.
Solid
Green
Normal operation. Fill valve is energized allowing water to flow into
canister via fill cup. (Does not illuminate when tempering water
during drain cycle.)
Flashing
Green
Fill and drain valves are pulsing to dislodge mineral build-up in
canister. Flashes 10 times in 4 seconds.
Solid Red
Fault mode. Indicates canister needs water but cannot fill. Humidifier
shuts down. Occurs if high water probe does not detect water
after fill valve is energized for 40 minutes. Call your heating and air
conditioning dealer for service.
Solid
Green
Normal operation. Humidistat is calling for steam and humidifier is
operating.
Solid
Yellow
Normal operation. Humidifier is operating but is not delivering
steam at rated capacity. Occurs if humidifier has operated for 168
hours at less than rated capacity due to low water conductivity. Light
will turn green once water conductivity increases and humidifier is
delivering rated capacity. If yellow light persists, consult your heating
and air conditioning dealer for canister options.
Flashing
Green
Humidifier is preparing to drain. (Fill valve is open tempering water
in canister.) Occurs when humidifier is turned OFF, at end of season
drain (72 hours with no operation) and during forced drain down
(168 hours of operation with no drain activity.)
Fill and drain valves are pulsing to dislodge mineral build-up in
canister. Flashes 10 times in 4 seconds.
Solid
Green
Drain valve is energized and open, draining canister. Valve remains
energized for 4 minutes.
Indicates end of season shut-down. Occurs if humidifier does not
receive call for humidity in 72 hours. Light remains on for 24 hours.
Humidifier will turn on with the next call for humidity.
Flashing
Red
Canister has reached the end of its life and needs to be replaced.
Occurs after humidifier has operated for at least 168 hours and for
an additional 24 hours at a current level below 75% of the maximum
operating current. Humidifier continues to operate, but at reduced
capacity.
Solid Red
Operational problem with humidifier. Humidifier shuts down. Occurs
when unit detects over-current which can be caused by failure to
drain or other system failures. Call your heating and air conditioning
dealer for service.
OPERATING INSTRUCTIONS – MODEL 62 AUTOMATIC
DIGITAL HUMIDIFIER CONTROL
The Model 62 Automatic Digital Humidifier Control (ADHC) offers 2 modes
of operation, Automatic or Manual. An explanation of both modes follows.
(SeeFIGURE 2 on page 10 for Automatic Mode. See FIGURE 3 on page 12 for
Manual Mode.)
When in the Automatic Mode, this system offers the following benefits:
• You will receive the optimum amount of humidity so that your home
and its furnishings are protected from the damaging effects of excess
condensation or low humidity during the heating season. The ADHC
automatically adjusts your home’s humidity based on the outdoor
temperature, increasing the time maximum comfort is maintained.
• Simple operation with few adjustments. In the Automatic Mode, the ADHC
eliminates the need to manually adjust the control when outdoor temperature
changes. It also eliminates the need to turn the dial setting to “OFF” during
the summer season.
MODEL 62 AUTOMATIC DIGITAL HUMIDIFIER CONTROL INDICATOR LIGHTS
Call Dealer for Service: The red light indicates that the control is not operating
normally and that service is required.
Humidifier ON: The green light indicates that the control is operating normally
and sending a call for humidity to the humidifier.
BLOWER ACTIVATION
The Blower Activation switch is set to the “ON” position to allow the humidifier
control to activate the HVAC fan for maximum humidification.
If the HVAC system has been idle for 1 hour, the humidifier control will activate
the HVAC system fan to sample the air for 3 minutes. If the RH is lower than
the set point, the humidifier control will activate the humidifier and keep the
fan running. The humidifier will continue to operate for 2 hours or until the
humidification set point is reached.
If the RH set point has not been reached by the end of a call for heat, the
control will continue to operate the humidifier and the HVAC fan until the
humidification set point is reached or 2 hours have elapsed.
When the Blower Activation switch is in the “OFF“ position, the humidifier
control will only operate the humidifier if humidity is required and the HVAC
system fan is operating or the HVAC system is producing heat.
NOTE: If used in conjunction with an Aprilaire 8570 Communicating
Thermostat, and the Blower Activation feature is desired, DO NOT wire the A B
communication terminals.
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