76
DETERMINING SPEEDS
In order to facilitate the setting of the speeds for the lift, it is recommended that the technician
has an available tachometer. Refer to your contract documents for the rated speed of the lift.
Additionally, the technician should have a set of temporary buttons set up and wired, as
instructed in the manual. By pressing the UP button alone, the lift will ascend at leveling
speed. By holding in the UP button and pressing the HS button, the lift will accelerate to full
speed. The rate of acceleration may be observed by the technician. The same procedure is
required for the DOWN direction settings.
If a tachometer is not available to set the speeds, the technician can use a stopwatch and time
the lift to set the speeds, as instructed. A simple method to set the leveling speed is to use a
standard landing doorway height. This height is usually 80" or 84" (2032 mm or 2134 mm).
For the DOWN direction, for example, set the lift car with the platform opposite to the top of the
door panel. This means the platform is now about 80"- 84" higher than the landing sill. Use
the stopwatch (or the second hand of a watch) and start the lift down in slow or leveling speed.
Time how long it takes to reach the bottom of the door or the landing level. It should take
about one (1) minute, and the leveling speed will be approximately seven (7) feet per minute.
If the speed is faster, the time will be shorter than one minute, in which case you would
decrease the FUNCTION F5 setting. (The lower the number is set, the slower is the leveling
speed.) If the timing is longer than one minute, then to speed up the lift the FUNCTION F5
number will have to be increased. The technician should note that the time of one minute is
approximate only, not absolute. A few seconds either way is insignificant. The objective is to
adjust the leveling speed to be approximately seven or eight feet per minute.
Repeat the process for the UP direction leveling speed. Start at the landing level and time how
long the lift takes to reach the top of the door panel.
When setting the fast speed without the use of a tachometer, use the following procedure:
Time the UP fast speed by setting the FUNCTION F3 to the highest number, 96. Time how
long it takes to travel the full distance from level at the bottom landing to level at the top
landing. Note this time. Now, time how long it takes for the lift to travel from the level at the
top landing to level at the bottom landing. The time should be approximately the same. If the
DOWN travel time is significantly longer than the UP travel time, then the lift is traveling slower.
To increase the speed in the DOWN direction, the FUNCTION F6 number must be raised.
NOTE
Do not slow down the UP direction fast travel speed (F3) by adjustment of the valve.
PROGRAMMING THE VALVE
Each FUNCTION adjustment (0 through 6) may be set to any number from one through 96.
Typically, the higher that the chosen number is, the further the EPV solenoid will open and the
faster the lift will move. The settings are different depending on speed, jack assembly and
type of lift or elevator.
NOTE
The valve is programmed from one to 99, however, the use of numbers 97-99 may cause
problems.
To Next Page
Loading...