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To turn the fan on, press the Power On/Start Fan button. The fan will start and the damper fl aps will open. Be-
cause the VentCool is a single speed fan, pressing this button repeatedly will have no effect on the fan’s speed.
To set the fan’s timer, press the INCREASE TIMER button. The timer will be set to 1 hour, after which the fan will
automatically turn off. To increase the timer’s setting, press this button again. Each time you press this button,
the timer’s setting will increase by 1 hour, up to 12 hours total. The timer resets each time the fan is turned off.
To turn the fan off, press the POWER OFF/FAN OFF button. The fan will turn off and the damper fl aps will fall
closed.
When starting this fan for the fi rst time, make sure to observe it turning on, running, and turning off from
both the attic (to see the fan itself) and the living space (to see the backdraft damper).
• If the fan does not turn on, check the power to the unit, the control connections, and the circuit breaker
feeding the fan mounted electrical control box.
• If the damper fl aps do not open or close, visually inspect the damper for any debris obstructing their move-
ment.
• If the steps above do not work, contact Field Controls Tech Support at 800.742.8368 or by email at
fi eldtec@fi eldcontrols.com for further assistance.
FIGURE 16A: VentCool 1.8
1st Generation Control Wiring Schematic
FIGURE 16B: VentCool 1.8
2nd Generation Control Wiring Schematic
P/N: 78030007018
P/N 78010007000 05/17 Rev B