System Checkout - Aprilaire 62 Safety And Installation Instructions Manual

Figure L – Model 62 wiring for Model 800 Series Steam
Humidifier and Model 60 Wiring for Model 700* Series
(Almond Housing) Humidifiers
ADHC TERMINAL STRIP
POWER
R C A
OUTDOOR TEMPERATURE SENSOR
FOR AUTOMATIC MODE
R
R
C
C
G
G
Y
Y
W
W
THERMOSTAT
FURNACE
OR ZONE PANEL
EQUIPMENT
TERMINALS
* Model 700 Series humidifiers produced prior to October
2007 have an almond color housing and internal transformer
providing 24VAC to the solenoid valve. Models produced after
October 2007 have a gray housing and external transformer
provided with the unit. For zoned HVAC systems, refer to the
THERMOSTAT IN A ZONED HVAC SYSTEM section found
in the Series 800 Steam Humidifier Installation and
Maintenance Instructions for instructions pertaining to
ductwork and wiring.
INPUTS OUTPUTS
B ODT W G H H Gf
MODEL 800
STEAM HUMIDIFIER
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SYSTEM CHECKOUT

1. Replace the cover by snapping it into the humidifier control
base. Also replace the knob onto the control.
2. Turn Blower Activation switch to "OFF."
3. Restore power to the HVAC system.
4. Activate the HVAC system or heat pump (fan or heat).
5. Once the blower is operating, rotate the knob of the
humidifier control clockwise to the "Test/Reset" position.
When the knob is set in the "Test/Reset" position, the green
"Humidifier On" light will illuminate. After 5 seconds, the
green "Humidifier On" light will blink, indicating a system
reset.
6. If the humidifier control and humidifier are set up properly,
you should hear the solenoid valve click into the open
position. On the Model 800 steam humidifier, the "Steam"
light will illuminate green. In the "Test/Reset" position, the
humidifier will operate for 1 minute. If the humidifier control
is left in the "Test/Reset" position for more than 1 minute,
the "H" terminals will open (closing the solenoid valve). The
knob and display backlights will flash, and the digital display
will show the software revision level (e.g., "r1") indicating that
90-1511
the humidifier control is still in the "Test/Reset" position.
7. If the humidifier does not activate with the humidifier control
in the "Test/Reset" position, refer to the troubleshooting
guide.
Blower Activation Test
• Deactivate HVAC system or heat pump.
• Turn knob to "OFF."
• Set switch to Blower Activation "ON."
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