700M OWNER’S MANUAL

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Your AprilAire Digital Humidier Control is installed in the cold air

return duct. During the rst heating season, your humidier 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 rst heating season, minor

adjustments may be necessary. This is dependent upon your

home’s construction. Refer to TABLE 3: Operation Guide.

The RH 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 Humidier.

90-1235

FIGURE A: ADHC (AUTOMATIC MODE)

AUTOMATIC MODE

Once blower activation mode is initiated, the humidier and

HVAC system fan will continue to operate for 2 hours or until the

humidication set point is reached.

When the BLOWER ACTIVATION switch is in the OFF position, the

humidier control will only operate the humidier if the HVAC system

fan or heat is on AND if the RH is lower than the set point.

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OWNER’S MANUAL - Page 7