Installation - Aprilaire 62 Safety And Installation Instructions Manual

The Model 62 shipped with the Model 800 steam humidifier is
factory set to "OFF." The Model 62 does not have the "Change
Water Panel" light on the control. The canister change indicator
for the Model 800 is on the humidifier.
STEP 4: Blower Activation Feature Explanation
The Blower Activation switch is set to the "ON" position 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 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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INSTALLATION

STEP 1: Mount the Humidifier Control
Humidifier control must be mounted on the return duct, at least 6
inches upstream of the following (see Figure D):
• Humidifier
• Humidifier bypass ductwork (if applicable)
• Fresh air intake ductwork (if applicable)
For accurate humidity control, mount the humidifier control at least
12 inches upstream of the steam humidifier dispersion tube.
Ambient operating temperature of the humidifier control is to be
from 20°F to 120°F to prevent damage to the control display.
RETURN
DUCT
6" MIN.
HUMIDIFIER
CONTROL
FRESH AIR
INTAKE
BYPASS
CONNECTION
Figure D
HUMIDIFIER
COIL
90-1137
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