Important: Mount the
switch so that the housing is level horizontally, or plumb vertically. Use a shim,
if necessary.
You can mount the F262AA switch on the top, side, or bottom of a duct.
- Mount the switch in a horizontal duct whenever possible. In a
horizontal duct, make sure that the switch housing is level and the paddle is at
approximately a right angle to the air flow. Figure 1. Mounting the F262 Switch in a horizontal duct
- When you mount the switch in a horizontal duct that is not
horizontally true, check with a level and place a shim under the switch mounting
plate. Do not mount the switch without a shim. See the following figure. Figure 2. Mounting the F262 Switch in an angled duct
- When you mount the switch in a vertical duct where the airflow
is upward as shown in the following figure, see Table 1 for the minimum
flow required to actuate the switch. The maximum air velocity must not exceed
2,000 fpm (10.16 m/s). Figure 3. Mounting the F262 control in a vertical duct
- When you mount the switch in a vertical duct where the airflow
is downward as shown in the previous figure, adjust the switch:
- Turn the adjustment screw clockwise until the switch closes the circuit between the red and blue terminals when there is no air flow. See the following figure.
- Turn the adjustment screw one additional turn clockwise.
Figure 4. F262 Switch action
