134
RT-SVX36G-EN
Unit Start Up
10. Open the field supplied main power disconnect switch upstream of the rooftop unit. Lock the
disconnect switch in the “Open” position while working on the dampers.
11. Compare the static pressure reading to the static pressure ranges and linkage positions in
for the unit size and operating CFM.
To relocate the fresh air/return air connecting rod to balance the fresh air damper pressure drop
against the return static pressure, use the following steps. If no adjustment is necessary, proceed
to step 17.
12. Remove the drive rod and swivel from the crank arm(s). If only one hole requires changing,
loosen only that end.
13. Manually open the return air dampers to the full open position.
14. Manually close the fresh air dampers.
15. Reattach the drive rod and swivel to the appropriate hole(s). The length of the drive rod may
need to be adjusted to align with the new hole(s) location. If so, loosen the lock nut on the drive
rod against the swivel. Turn the swivel “in” or “out” to shorten or lengthen the rod as necessary.
For some holes, both ends of the rod may need to be adjusted.
16. Tighten the lock nut against the swivel(s).
17. Plug the holes after the proper CFM has been established.
Use
to select the appropriate crank arm hole configuration based on the;
a. specific unit
b. operating CFM
c. and return static pressure.
WARNING
Rotating Components!
The following procedure involves working with rotating components. Disconnect all electric
power, including remote disconnects before servicing. Follow proper lockout/tagout
procedures to ensure the power can not be inadvertently energized. Failure to disconnect
power before servicing could result in rotating components cutting and slashing technician
which could result in death or serious injury.
Table 48. F/A Damper travel adjustment
Position of Connecting Rod
Damper Crank Arm Hole
Configuration
Position #1
2 - 3
Position #2
2 - 4
Position #3
2 - 5
Position #4
2 - 6
Position #5
1 - 8
Position #6
1 - 7
Note:
As shipped from the factory, the connect rod is installed in Position #1.
