Automatic Digital
and Manual
Humidifier Control
Models 60, 62 & 4655
Operating
Instructions
INSTALLER:
Please leave this Operation Manual with the homeowner.
YOUR HUMIDIFIER
Your humidifier is controlled by either an Automatic Digital Humidifier Control, or a Manual Humidifier Control.
The Automatic Digital Humidifier Control offers two modes of operation, Automatic or Manual. 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 Control automatically adjusts your home’s RH based on the outdoor temperature, increasing the time maximum comfort is maintained
•Simple operation with few adjustments. The Control 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.
Digital Humidifier Control Indicator Lights
Call Dealer for Service: The red light indicates that the humidifier is not operating normally and that service is required.
Change Water Panel: The yellow light indicates that it is time to change the Water Panel in the humidifier. (Model 60 only. The Model 62 is used for steam applications that do not require this feature.)
Humidifier On: The green light indicates that the humidifier is operating normally.
OPERATING INSTRUCTIONS
Blower Activation
Set the “Blower Activation Switch” to “ON” to allow the humidifier control to activate the HVAC fan for maximum humidification. For this setting the Models 500, 600 and 700 must be connected to hot water.
If the HVAC system has been idle for one 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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Automatic Digital Humidifier Control
Your Automatic Digital Humidifier Control works in conjunction with your heating, ventilating, air conditioning equipment (HVAC) to control the operation of the humidifier. The control senses indoor humidity and outdoor temperature and automatically adjusts the operation of the humidifier to provide the optimum humidity level in the home.
The digital readout on the automatic control displays the humidity level inside the cold air return duct. This reading will accurately indicate the humidity in the living space when the HVAC blower is operating.
AUTOMATIC MODE (Manual Mode – see page 6)
Figure A – Automatic Mode
90-1235B
Your Aprilaire Humidifier Control is installed in the cold air return duct. During the first heating season, your 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 TABLE 3 – Operation Guide.
2.During the coldest portion of the first heating season, minor adjustments may be necessary. This is dependent upon your home’s construction. Refer to TABLE 3 – Operation Guide.
The 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 to “OFF” when performing annual maintenance of your Aprilaire humidifier.
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