(8) OPTIONAL – INSTALL AN AUTOMATIC DIGITAL HUMIDIFIER CONTROL (ADHC)
Figure 9 | Automatic Digital Humidifier Control |
|
Note: The ADHC uses its own outdoor temperature sensor, which is read by the thermostat. If an ADHC is to be installed, do not wire an outdoor temperature sensor to the ODT terminal of the thermostat.
2. | Run a |
3. | Wire the ADHC to the thermostat (see Figure 9). |
| • Strip 1/4" of insulation from the ends of the wires. |
| • Connect the A terminal of the ADHC to the ZA terminal |
R C A B ODT W/G Cf | H |
1.Mount the ADHC and its outdoor temperature sensor.
•Follow the directions provided with the ADHC except do not mount the ADHC temperature sensor in a fresh air intake. The temperature sensor must be mounted outside to provide a precise temperature reading.
•Maximum wire length from ADHC to thermostat is 300 feet.
•The ADHC must have constant power. DO NOT power the ADHC through furnace accessory terminals. DO NOT use a Model 50 Current Sensing Relay.
•NOTE: Operating the ADHC in Manual Mode will result in the outdoor temperature shown on the thermostat to always be 20°F.
CAUTION
Do not run the wire along side line voltage
| of the thermostat. |
| • Connect the B terminal of the ADHC to the ZB terminal |
| of the thermostat. |
4. | You will need to power up the thermostat to verify the |
| connection. Refer to step 7 of THERMOSTAT START UP |
| on page 28. |
5. | After completing the thermostat installation, you will also |
| need to verify proper operation of the ADHC – see ADHC |
| installation instructions for details on how this is done. |
WARNING | Improper installation may cause serious |
|
injury from electrical shock. Do not power up humidifier before completing the thermostat installation.
Transformer
Model 8570 Thermostat
To Humidifier
Outdoor
Temperature
Sensor
Note: ADHC must be powered by a continuous supply - do not wire to furnace accessory terminals.
(120 VAC) or higher lines as this can cause erratic readings.
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