Figure D – Fiber Board Duct Mount |
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| CONTROL BOARD |
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COVER | GASKET | |
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| SCREW (x2) |
KNOB |
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| INSIDE OF |
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| RETURN |
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| DUCT |
| BASE PLATE |
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| SHEET METAL PLATE |
| RETURN DUCT |
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RETURN | SHEET METAL | CUT OPENING IN |
DUCT | PLATE | RETURN DUCT |
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| 8 |
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Figure E – Digital Humidifier Control 24V Terminals | |||||||||
R | C | A | B | ODT | W | G | H | H | Gf |
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| OUTDOOR |
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| FAN SIGNAL | |
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| TEMPERATURE |
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| TO HVAC | ||
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| SENSOR |
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| EQUIPMENT | |
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| COMMUNICATION |
| HEAT SIGNAL |
| SOLENOID |
| ||
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| WITH APRILAIRE |
| FROM HVAC |
| CONTROL |
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| 8570 THERMOSTAT |
| EQUIPMENT |
| OUTPUT |
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24 VAC FROM |
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| FAN SIGNAL |
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HVAC EQUIPMENT |
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| FROM |
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“R” AND “C” |
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| THERMOSTAT |
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| ||||
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| 9 |
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