Control Valve Adjustment and Method | Donam Engineering Co., Ltd.

Start · Pressure (#1, S)

Bypass

Adjuster #1 · Green

Function

Once the elevator specifications are decided and the pump delivery is calculated, a valve matching the specifications is shipped.
→ When coil A is de-energized, the car does not move even if the motor is running.

How to adjust

After the pump starts and coils A and B are energized, the car does not start immediately but stays still for 1 ~ 2 seconds.
Adjuster #1 adjusts this standstill time.
Clockwise shortens the standstill time,
counterclockwise lengthens it.

Pressure control valve adjustment S

Function

Close the shut-off valve and adjust until the specified value is reached. Then lock it with the headless bolt.

Upward travel (#2 ~ #5)

Upward acceleration

Adjuster #2 · Green

Function

Once the pump runs and the coils are energized, the car can be accelerated or decelerated by adjusting #2.
→ If the acceleration with adjuster #2 is satisfactory, make no further adjustment.
Adjuster #2 affects adjusters #3 and #4.

How to adjust

Turn clockwise for gentle acceleration
Turn counterclockwise for rapid acceleration

Upward deceleration

Adjuster #3 · Green

Function

Adjust #3 until satisfactory deceleration is obtained. Then fix the safety switch. This activates the coil to obtain a creep distance of 3 ~ 5 cm.
The travel speed in m/sec equals the distance between the safety switch and the landing switch. That is, at V = 0.5 m/sec, the distance is 0.5 m

How to adjust

When coil B is de-energized while coil A remains energized, the car decelerates according to adjuster #3.
Turn clockwise for gentle deceleration
Turn counterclockwise for rapid deceleration

Upward landing

Adjuster #4 · Green

Function

Adjusts the creep speed.
V = 5 ~ 7 cm/sec

How to adjust

When coil A is energized and coil B is de-energized, the landing speed changes according to adjuster #4. To adjust the landing speed,
turn clockwise for slower landing
turn counterclockwise for faster landing

Upward stop

Adjuster #5 · Green

Function

At the landing floor, when coil B is de-energized, coil A is de-energized.
→ If the pump is run 0.5 seconds longer via a time relay, the car stops smoothly according to adjuster #5.
→ Speed is not raised further with the adjuster; it is determined by the pump delivery.

How to adjust

Use adjuster #5 to land the car smoothly.
Clockwise: soft stop
Counterclockwise: abrupt stop

Downward travel (#6 ~ #9)

Downward acceleration

Adjuster #6 · Red

Function

When coils C and D are energized, downward acceleration is set by adjusting adjuster #6.

How to adjust

Clockwise: gentle downward speed
Counterclockwise: fast downward speed
→ Adjuster #8 affects adjuster #6. Readjust adjuster #6 if necessary.

Downward travel

Adjuster #7 · Red

Function

When coils C and D are energized, the maximum downward speed of the car is determined by adjuster #7.

How to adjust

Clockwise: gentle downward speed
Counterclockwise: fast downward speed

Downward deceleration

Adjuster #8 · Red

Function

Soft downward deceleration test (soft stop test)
When coils C and D are de-energized at maximum downward speed, the car must come to a gradual, smooth stop within 20 cm.

How to adjust

When coil C is de-energized while coil D remains energized, the car decelerates according to adjuster #8.
Clockwise: gentle deceleration
Counterclockwise: rapid deceleration
→ If the deceleration is satisfactory, make no further adjustment to adjuster #8. Adjuster #6 may then need to be readjusted.

Downward landing

Adjuster #9 · Red

Function

When coil C is de-energized and coil D is energized, the downward landing is set by adjuster #9.
→ When coil C is de-energized the car stops according to adjuster #8, so no further adjustment is needed.

How to adjust

Clockwise: gentle downward landing
Counterclockwise: fast downward landing