Vertical Express I-2 User manual

I-2 / I-3 Valve
®®

Every attempt has been made to ensure that this documentation is as accurate and up-to-date as
possible. However, Vertical Express assumes no liability for consequences, directly or indirectly,
resulting from any error or omission. The material contained herein is subject to revision. Please report
any problems with this manual to Vertical Express, P.O. Box 2019, Memphis, Tennessee 38101.
Vertical Express • P.O. Box 2019 • Memphis, Tennessee 38101
© 2019 Vertical Express. All rights reserved.
Published August, 2019
Third Edition
Printed in the United States of America
Manual Number: 89130 v.3.0

I-2 / I-3 Valve Contents
August 2019 - 89130 v.3.0 1
Contents
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Terms in This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mechanical Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Arrival of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Static Protection Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Preliminary Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Oil Viscosity and Viscosity Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Relief Pressure Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Low Pressure Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Lowering and Leveling Speed Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Preliminary Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Relief Pressure Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Up and Down Inspection Speed Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Final Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Valve-Up Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Valve-Down Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Performance Check with Full Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Final Relief Pressure with Full Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Valve Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Relief Pressure Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Low Pressure Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Troubleshooting Table - Up Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Troubleshooting Table - Down Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Reference Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Sequence of Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Quick Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Contents I-2 / I-3 Valve
2©Vertical Express
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intentionally
left blank.

I-2 / I-3 Valve Contents
August 2019 - 89130 v.3.0 3
Safety Precautions
Read this page before any work is performed on elevator equipment. The pro-
cedures contained in this manual are intended for the use of qualified elevator
personnel. In the interest of your personal safety and the safety of others, do
not attempt any procedure that you are not qualified to perform.
All procedures must be accomplished in accordance with the applicable rules in the
latest edition of the National Electrical Code, the latest edition of ASME A17.1, and
any governing local codes.
Terms in This Manual
CAUTION statements identify conditions that may result in damage to the
equipment or other property if improper procedures are followed.
WARNING statements identify conditions that may result in personal injury if
improper procedures are followed.
General Safety
Before applying power to the controller, check that all manufacturing wire con-
nections are tight on relays, contactors, fuse blocks, resistors, and terminals on
cards and DIN rail terminals. Connections loosened during shipment may
cause damage or intermittent operation.
Other specific warnings and cautions are found where applicable and do not appear in this
summary. See the
Elevator Employee Safety and Accident Prevention Program Manual
and the
Elevator Industry Field Employees’ Safety Handbook for electrical equipment
safety information on installation and service.
Electrical Safety All wiring must be in accordance with the National Electrical Code and be consistent with
all state and local codes.
Use the Proper Fuse To avoid fire hazards, use only a fuse of the correct type, voltage, and current rating. See
the job specific drawings sheet (Power Supplies) for fusing information.
Electric shocks can cause personal injury or loss of life. Circuit breakers, switches, and
fuses may not disconnect all power to the equipment. Always refer to the wiring diagrams.
Whether the AC supply is grounded or not, high voltage will be present at many points.
Printed Circuit Cards Printed circuit boards may be damaged if removed or installed in the circuit while applying
power. Before installation and/or removing printed circuit boards, secure all power. Always
store and ship printed circuit cards in separate static bags.
Mainline Disconnect Unless otherwise directed, always Turn OFF, Lockout, and Tagout the mainline disconnect
to remove power from elevator equipment. Before proceeding, confirm that the equipment
is de-energized with a volt meter. Refer to the
Elevator Employees’ Safety and Accident
Prevention Program Manual
for the required procedure.

Contents I-2 / I-3 Valve
4©Vertical Express
Electrical Safety
(continued)
Test Equipment Safety Always refer tomanufacturers’ instruction book for proper test equipment operation
and adjustments.
Megger or buzzer-type continuity testers candamage electronic components. Connection
of devices such as voltmeters on certain low level analog circuits may degrade electronic
system performance. Always use a voltmeter with a minimum impedance of 1M Ohm/Volt.
A digital voltmeter is recommended.
When Power Is On To avoid personal injury, do not touch exposed electrical connections or components while
power is ON.
Mechanical Safety
See the Elevator Employees’ Safety and Accident Prevention Program Manual and the Ele-
vator Industry Field Employees’ Safety Handbook
for mechanical equipment safety infor-
mation on installation and service.
Arrival of Equipment
Receiving Upon arrival of the equipment, inspect it for damage. Promptly report all visible damage to
the carrier. All shipping damage claims must be filed with the carrier.
Storing During storage in a warehouse or on the elevator job site, precautions should be taken to
protect the equipment from dust, dirt, moisture, and temperature extremes.
Asbestos Compliance
Vertical Express elevator personnel will no longer drill or modify any doors with asbestos
containing materials (ACM) or possible asbestos containing materials (PACM). All elevator
doors manufactured or installed 1980 and earlier will be treated as having ACM/PACM.
Doors with ACM/PACM should be replaced rather than modified. If replacement is not fea-
sible, abatement modifications shall be done by a licensed asbestos abatement company.
Vertical Express mechanics will safely stage the equipment for the abatement team, or
remove the doors and seal them with plastic for delivery or pick up by the asbestos abate-
ment company.
Doors manufactured or installed 1980 and earlier may be modified by Vertical Express
employees if a test is conducted by a licensed asbestos company prior to work showing
zero evidence of ACM/PACM.
All employees that risk exposure to asbestos will complete Vertical Express safety depart-
ment approved asbestos awareness training.
All employees will stop any work that could expose them to ACM/PACM, and immediately
contact their supervisor and their safety manager. All exceptions must be approved by the
Director of Health and Safety.

I-2 / I-3 Valve Contents
August 2019 - 89130 v.3.0 5
Static Protection Guidelines
Read this page before working with electronic circuit boards.
Elevator control systems use a number of electronic cards to control various functions of
the elevator. These cards have components that are extremely sensitive to static electricity
and are susceptible to damage by static discharge.
Immediate and long-term operation of an electronic-based system depends upon the
proper handling and shipping of its cards. For this reason, Manufacturing bases warranty
decisions on the guidelines below.
Handling • Cards shipped from Manufacturing in separate static bags must remain in the
bags until time for installation.
• Anti-static protection devices, such as wrist straps with ground wire, are required
when handling circuit boards.
• Cards must not be placed on any surface without adequate static protection.
• Only handle circuit cards by their edges, and only after discharging personal
static electricity to a grounding source. Do NOT touch the components or
traces on the circuit card.
• Extra care must be taken when handling individual, discrete components such as
EPROMS (which do not have circuit card traces and components for suppression).
Shipping • Complete the included board discrepancy sheet.
• Any card returned to Manufacturing must be packaged in a static bag designed
for the card.
• Any card returned to Manufacturing must be packaged in a shipping carton
designed for the card.
• “Peanuts” and Styrofoam are unacceptable packing materials.
Failure to adhere to the above guidelines will void the card warranty!

Contents I-2 / I-3 Valve
6©Vertical Express
This page
intentionally
left blank.

I-2 / I-3 Valve Preliminary Settings
August 2019 - 89130 v.3.0 7
Preliminary Settings
Oil Viscosity and Viscosity Control
Use extreme caution when making adjustments near moving belts. When operat-
ing the elevator from the controller, follow all safety precautions.
• Verify that the power unit is in a ventilated room that remains between 50°F and 90°F.
• Adjust the valve when the oil is at its operating temperature of 100°F to 170°F.
• Check the unit performance when the oil temperature is no less than 100°F.
• Changes in oil temperature cause changes in valve behavior.
Relief Pressure Setting
The I-2/I-3 Valve requires a minimum static system pressure of 90 PSI.
1. Ensure that the car is empty.
2. Turn OFF, Lockout, and Tagout the mainline disconnect.
3. Open the manual lowering valve to lower the car onto the buffers. See Figure 1.
4. Close the manual lowering valve.
5. Install a pressure gauge on the quick connector located on the far side of the valve.
6. Turn the relief pressure adjustment screw OUT until 5/8" extends beyond the relief
assembly housing, and then tighten the locknut.
Figure 1 - Relief Pressure Setting
Manual Lowering Valve
5/8"
Relief Pressure
Adjustment
Up Leveling
Adjustment

Preliminary Settings I-2 / I-3 Valve
8©Vertical Express
Preliminary Settings
(continued)
Low Pressure Setting
OUT = Counterclockwise (CCW), IN = Clockwise (CW)
1. Turn the low pressure adjustment screw OUT 1
3/4
" beyond the cover plate. See Figure 2.
2. Turn the low pressure adjustment screw IN by hand until it touches the regulator piston.
3. Turn the up leveling adjustment screw OUT until it stops.
4. Turn the up leveling adjustment screw IN 4 turns.
Adjustment Needles
To make adjustments, do not loosen the nuts on the adjustment needle stems. The nuts
must be snug against the valve body at all times.
1. Turn the up start, up stop, and up slowdown adjustments IN to the fully closed position.
See Figure 2.
2. Turn the up start adjustment OUT 9 turns.
3. Turn the up stop adjustment OUT 3 turns.
4. Verify that the up slowdown adjustment remains closed.
Figure 2 - Valve Adjustments


Low Pressure
Adjustment
Up Leveling
Adjustment
Up Start
Adjustment
Up Stop Adjustment Up Slowdown Adjustment
Down Start
Adjustment
Down Stop
Adjustment
Lowering and Leveling
Speed Adjustment
Down Slowdown
Adjustment

I-2 / I-3 Valve Preliminary Settings
August 2019 - 89130 v.3.0 9
Lowering and Leveling Speed Setting
To prevent damage to the piston face and seat, do not adjust the lowering and
leveling screw unless the car is resting on the buffers or the car is in motion.
1. Lower the car onto the buffers.
2. Adjust the lowering and leveling screw so that 3/4" extends beyond the valve body.
See Figure 3.
3. Ensure the flat end of the screw points 45° counterclockwise to the tank return line.
4.
Tighten the locknut.
Figure 3 - Lowering and Leveling Speed Setting
Adjustment Needles
To make adjustments, do not loosen the nuts on the adjustment needle stems. The nuts
must be snug against the valve body at all times.
1. Turn the down start, down stop, and down slowdown adjustments IN to the fully
closed position. See Figure 2 on page 8.
2. Turn the down start adjustment OUT 9 turns.
3. Turn the down stop adjustment OUT 10 turns.
4. Verify that the down slowdown adjustment remains closed.
Tank Return Line
ƺ/Dž"
45º
Flat End
of Screw


Preliminary Adjustments I-2 / I-3 Valve
10 ©Vertical Express
Preliminary Adjustments
When operating the elevator from the controller, follow all safety precautions.
1. Ensure that the car is empty and the manual lowering valve is closed.
2. Turn OFF, Lockout, and Tagout the mainline disconnect.
3. Disconnect the solenoid wire from the controller to disable the up slow solenoid. See
the appropriate controller diagrams.
4. Place the controller on Inspection Operation to disable the up fast solenoid.
The type of controller determines how Inspection Operation is accomplished.
5. Turn the power on, and start the motor.
6. Turn the low pressure adjustment IN just until the car starts to move.
7. Turn the low pressure adjustment OUT until the car movement stops.
8. After the car stops, turn the low pressure adjustment OUT an additional half turn.
9. On valves marked with SP on the cover plate or the valve nameplate:
a. Turn the low pressure adjustment OUT 3 turns.
b. Start and stop the car to check for excessive delay between the motor starting and
the car moving.
c. If there is excessive delay, turn the low pressure adjustment IN slightly.
d. Repeat steps b and c until the excessive delay is eliminated.
10. Tighten the locknut.
11. Stop the motor, and turn the power off.
12. Remove any jumpers that may have been used.
13. Reconnect the up slow solenoid wire to the controller.


I-2 / I-3 Valve Preliminary Adjustments
August 2019 - 89130 v.3.0 11
Relief Pressure Adjustment
Stop the power unit immediately if the pressure exceeds 625 PSI.
1. Close the line shut-off valve, and install a pressure gauge.
2. Place the controller on Inspection Operation.
3. Turn the power ON, start the motor, and read the pressure.
4. Adjust the relief valve to relieve at the pressure indicated on the power unit nameplate.
See Figure 4.
5. Tighten the locknut.
6. Turn OFF, Lockout, and Tagout the mainline disconnect.
7. Open the manual lowering valve to relieve the jack pressure.
8. Close the manual lowering valve.
Figure 4 - Relief Pressure Adjustment
9. Turn the power ON, and recheck the relief pressure.
10. Turn OFF, Lockout, and Tagout the mainline disconnect.
11. Repeat steps 7 and 8.
12. Open the line shut-off valve.
Relief Pressure Valve:
IN (CW) =
Increases Relief
Pressure
OUT (CCW) =
Decreases Relief
Pressure
Manual
Lowering
Valve
Relief
Pressure
Valve
Power Unit
Nameplate

Preliminary Adjustments I-2 / I-3 Valve
12 ©Vertical Express
Up and Down Inspection Speed Adjustment
1. Turn the up slowdown adjustment screw OUT 10 turns to ensure that the car does not
initially start up. See Figure 5.
2. Place the car on Inspection Operation, and start the car up.
3. Slowly turn the up slowdown adjustment screw IN until the car moves at 10 to 12 FPM.
4. Check the up leveling speed.
5. Turn the down stop adjustment screw OUT 10 turns to ensure that the car does not ini-
tially start down.
6. Place the car on Inspection Operation, and start the car down.
7. Slowly turn the down stop adjustment screw IN until the car runs down at 15 to 20 FPM.
8. Turn the lowering and leveling speed adjustment screw in less than one-quarter turn
increments, pausing and observing between each change, until the leveling speed is
10 to 12 FPM.
If the adjustment screw is turned more than one-quarter turn, the car locks in the down
direction. To unlock, run the car up on Inspection Operation while an assistant in the
machine room turns the lowering and leveling speed adjustment screw OUT a small amount.
9. Tighten the locknut.
If the car does not stop, turn the down stop adjustment screw OUT until the car stops.
10. Check the down leveling speed.
Figure 5 - Valve Adjustments


Low Pressure
Adjustment
Up Leveling
Adjustment
Up Start
Adjustment
Up Stop Adjustment Up Slowdown Adjustment
Down Start
Adjustment
Down Stop
Adjustment
Lowering & Leveling
Speed Adjustment
Down Slowdown
Adjustment

I-2 / I-3 Valve Final Adjustments
August 2019 - 89130 v.3.0 13
Final Adjustments
The manufacturing presets of the valve adjustments are attached to the inside of the con-
troller. These values ensure movement of the car and reduce final adjustment time.
Adjustment of the I-2/I-3 Valve requires a minimum static system pressure
of 90 PSI.
When operating the elevator from the controller, follow all safety precautions.
Valve-Up Section
Up Slowdown and Up Leveling Speed
1. Verify that the car is empty.
2. Place the controller on Automatic Operation, and send the car to the lowest landing.
3. While observing the leveling zone, run the car to the floor above.
4. Adjust the up slowdown for 3 to 4 inches of leveling.
Each time the up slowdown is adjusted, the up leveling speed must
be rechecked.
5. Adjust the up leveling speed adjustment for an up leveling speed of 10 to 12 FPM.
Run the car up on Inspection Operation after each change and check the speed until
10 to 12 FPM is obtained.
6. Place the car on Automatic Operation.
7. Check the leveling zone for 3 to 4 inches, and the leveling speed for 10 to 12 FPM.
8. Continue to adjust the up slowdown and the up leveling until achieving the
desired performance.
Up Slowdown - Adjust for 3 to 4 inches of Leveling
IN (CW)
Shorten Leveling Zone
Increase Leveling Speed
Softer Up Slowdown
Up Leveling - 10 to 12 FPM
IN (CW) Increase Leveling Speed
Softer Up Slowdown

Final Adjustments I-2 / I-3 Valve
14 ©Vertical Express
Valve-Up Section
(continued)
Up Stop and Up Start
The up stop adjustment must be adjusted first because it affects the up start adjustment.
1. Adjust the up stop for a soft but positive stop.
2. Adjust the up start for a smooth but positive start.
3. Verify that full up speed is reached on a one-floor run, which may require the up start
to be more positive.
4. Slightly adjust the slowdown to achieve optimum performance, if necessary.
Valve-Down Section
Lowering Speed
If no speed change occurs with one full turn on the lowering speed adjuster, do
not continue to turn it out. Check for a stop open wider than a start, or a mechan-
ical piston binding.
1. Place the car on Automatic Operation.
2. Set the lowering speed.
a. Use an empty car, and turn the lowering speed adjustment in one-half
turn increments.
b. After each adjustment, leave the flat end of the screw pointed 45° to the tank
return line.
IN (CW)
Up Stop Up Start
Stop Softer Start Smoother
Start Firmer Limit High Speed
Lowering Speed
OUT
(CCW)
One-half Turn Increments
Increase Lowering Speed

I-2 / I-3 Valve Final Adjustments
August 2019 - 89130 v.3.0 15
Valve-Up Section
(continued)
Down Leveling Speed and Down Stop
The down leveling speed and the down stop adjustment must be performed together since
the down stop adjustment affects the down leveling speed. However, the down leveling
speed does not affect the down stop adjustment.
1. Place the controller on Inspection Operation.
2. Adjust the down stop for a positive stop.
3. Adjust the down leveling speed to 10 to 12 FPM.
4. Tighten the locknut on the down leveling speed adjustment.
5. Check the down leveling speed.
Down Start
1. Place the controller on Automatic Operation.
2. Adjust the down start adjustment to obtain a smooth start.
3. Ensure that the car achieves full speed on a one-floor run. If it does not, make the
down start more positive.
Down Stop
IN (CW) Stop Softer
Increase Leveling Speed
Down Leveling Speed
OUT (CCW) Less than one-quarter turn increments
Increase Leveling Speed
Down Start
IN (CW) Start Smoother

Final Adjustments I-2 / I-3 Valve
16 ©Vertical Express
Valve-Up Section
(continued)
Down Slowdown
The effect of the down slowdown adjustment is the opposite of the previous adjustments.
Turning OUT on the down slowdown adjustment shortens the leveling zone. Turning IN on
the down slowdown adjustment lengthens the leveling zone. Make this adjustment in small
increments as soon as a change is observed in the leveling zone. The car will overshoot the
landing if the adjustment is turned OUT too far.
1. Turn the down slowdown adjustment OUT in small increments until the car has a level-
ing zone of 3 to 4 inches.
Typical adjustment:
a. Ensure that the down slowdown adjustment screw is 3 turns out from closed.
b. Make single, complete turns, one at a time, until the slowdown leveling changes.
c. Turn the down slowdown adjustment screw less than 1 turn to achieve 10 to 12
FPM and 3 to 4 inches of leveling.
2. Use the UIT to verify the leveling zone by selecting Show Stabilized Leveling.
It may be necessary to slightly alter the point in the hoistway where the slowdown is initi-
ated to achieve optimum valve and car performance. This action is usually accomplished by
either switch location or selector settings.
Performance Check with Full Load
1. Place a capacity load on the car.
2. Run the car on Automatic Operation, and check its performance at all floors.
• Valve functions are firmer at upper landings. Adjustments affect empty
car performance.
• The down leveling speed increases and the down leveling zone shortens. It may be nec-
essary to change the down slowdown adjustment to verify at least 2 inches of leveling.
• If necessary, turn IN on the down slowdown adjustment to increase the down
leveling zone.
• The up leveling speed increases. The up leveling zone changes between no load and
full load. Do not change any adjustments made with no load if there is at least one 1
inch of up leveling zone with a full load.
• If necessary, turn OUT on the up slowdown adjustment to increase the up leveling zone.
3. Verify that the car reaches full speed in both directions on a one-floor run.
4. Record the working pressure in the up direction.
The working pressure value is used in the next procedure.
5. Remove the capacity load from the car.




I-2 / I-3 Valve Final Adjustments
August 2019 - 89130 v.3.0 17
Final Relief Pressure with Full Load
Stop the power unit immediately if the pressure exceeds 625 PSI.
1. Place the controller on Inspection Operation, and close the line shut-off valve.
2. Start the pump, and read the relief pressure.
3. Add 25% to the working pressure recorded previously (see step 4 on page 16), and
set the relief valve to relieve at this new pressure value.
4. Stop the power unit, and tighten the locknut on the relief pressure adjustment.
5. Recheck the relief pressure.
6. Open the line shut-off valve, and place the car on Automatic Operation.

Valve Tests I-2 / I-3 Valve
18 ©Vertical Express
Valve Tests
Relief Pressure Verification
This test ensures that the pipe couplings and valve cannot be damaged if the elevator sys-
tem’s oil flow or platform become restricted.
Stop the power unit immediately if the pressure exceeds 625 PSI.
1. Close the shut-off valve.
2. Install a pressure gauge on the silencer's quick connect.
3. While monitoring the pressure gauge, use a runbug to run the power unit in the up
direction in short bursts. After confirming that the pressure does not exceed 625 PSI,
the pump motor can run constantly to verify the relief pressure setting.
4. If the pressure exceeds 625 PSI, adjust the pressure relief to reduce pressure.
• OUT = Counterclockwise (CCW) = Decrease Relief Pressure
• IN = Clockwise (CW) = Increase Relief Pressure
5. Briefly open the manual lowering valve to relieve pressure from the valve, and confirm
that the valve is fully closed when finished.