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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.
OPERATING INSTRUCTIONS – MODEL 62 AUTOMATIC
DIGITAL HUMIDIFIER CONTROL
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.
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.
DISPLAY PANEL
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