Figure 2: Manual override and actuator coupler
Table 1: Manual override and actuator coupler
1
Manual override button
2
Actuator coupler
14. If the damper for a 45° or 60° box closes CCW or CW, rotate the coupler to the CW mechanical
limit. This action sets the open end-stop; the closed end-stop is set by the closed damper.
For 45° and 60° boxes, you must provide hard stops at both full-closed and full-open damper
positions. If you install the ZEC510 at the full-open position, it provides the open stop for 45°
and 60° boxes. The closed damper seal provides the full-closed stop.
15. Tighten the square coupler bolt to the shaft using an 8 mm (5/16 in.) wrench or 10 mm (3/8 in.)
12-point socket. Tighten to 10.5 N·m to 11.5 N·m (95 lb·in to 105 lb·in).
16. Put a loop in the poly tubing to trap condensation when you attach the poly tubing to
the ZEC510 pressure transducer ports. Loop the poly tubing before you make the final
connections.
17. Push the manual override button, and turn the actuator coupling manually to ensure that the
actuator can rotate from the full-closed to the full-open positions without binding.
18. Rotate the damper to the full-open position.
Verasys ZEC510 VAV Controllers Installation Guide
8
