Vertical Express I-2 - Page 68

Reference Material I-2 / I-3 Valve
66 ©Vertical Express
Quick Reference
(continued)
Final Adjustments
* If the valve locks up in the down direction due to the orientation of the ƪats on the lowering and leveling screw, run the
car up, and change the orientation of the screw 90° while the car is moving to restore function.
Adjustment (ƨHct On Performance
Notes
No. Name CW CCW
1
Down Stop
Softer stop, ƩUPHU
start, faster leveling
Firmer stop, softer
start, slower leveling
Set Ʃrst, then leave alone.
$ƨects other Down adjustments.
Up Stop
Softer stop,
ƩUPHUVWDUW
Firmer stop,
softer start
Set before Up Start. Too soft will allow car to overshoot.
2
Down Start
Must be more open (CCW) than Down Stop. Increase
CCW if full speed cannot be achieved on one-ƪoor run.
Must be more open (CCW) than Up Stop. Increase
CCW if full speed cannot be achieved on one-ƪoor run.
3
Reduce fast
lowering speed
Adjust in roughly Ƹ/ǃ turn increments.
Up Fast
4
Lowering &
Leveling*
Reduce leveling speed
Increase leveling speed
Adjust in less than Ƹ/lj turn increments. Hold screw to
tighten locknut so settings don’t change. Very sensitive.
Up Leveling
May DƨHFW UP
Slowdown.
5
Down
Slowdown
Up
Slowdown
Very sensitive. More CCW gives more abrupt slowdown.
$ƨHFWV Up Leveling.
Travel (Up or Down)
Speed
Recommended Adjusting Order: Adjustment 1, 2, 3, 4, 5 on DOWN side, then Adjustment 1, 2, 3, 4, 5 on UP side.
Typical Performance Curve
Adjustment 2
Starting Acceleration
Adjustment 3
Fast Speed
Adjustment 4
Leveling Speed
Set at 10-12 FPM
Adjustment 1
Deceleration to Full Stop
Adjustment 5
Deceleration to Leveling Speed
Adjustment 5
Leveling Zone
Set at 3"-4"
Lowering &
Leveling*
More abrupt start
Softer start
Up Start
Softer start
More abrupt start
N/A No adjustment. Set by pump capacity.
Increase leveling speed,
softer slowdown
Decrease leveling speed,
ƩUPHUVORZGRZQ
Increase leveling zone,
ƩUPHUVORZGRZQ
Increase fast
lowering speed
Decrease leveling zone,
softer slowdown
Decrease leveling zone,
softer slowdown,
increase leveling speed
Increase leveling zone,
ƩUPHUVORZGRZQ
decrease leveling speed
N/A
Very sensitive. Must ƩQG "sweet spot" of about Ƹ/lj turn
range to DƨHFWDGMXVtment. $ƨHFWV Down Leveling.