Enerpac ZU4 T Serie Manual De Instrucciones página 4

5.1 Two (2) Button Pendant Operation
Figure 6, 2-Button Pendant
5.2 Torque Wrench Electric Valves with 2-Button
Pendant Operation
Oil flow and motor are both controlled by the pendant (see Fig. 6).
1. Up Arrow = Momentary Advance (Auto Mode Off). Auto cycle
between Advance and Retract (Auto Mode On). Release of
Up Arrow button automatically retracts torque wrench. (Auto
Mode On or Off)
2. On/Off = Toggle Motor On or Off
Shroud On/Off = Toggle motor Off
5.3 Setting Pump Pressure
Control Handle
Figure 7, Relief Valve
Z-Class Torque Wrench pumps provide the operator with two
methods of limiting the Advance (A port) pressure to the torque
wrench: User Adjustable Relief Valve and Auto Cycle.
A. User Adjustable Relief Valve
Limits the pressure by opening the relief valve to redirect the
pump's oil flow to the reservoir at the desired pressure value.
Pressure will remain in the Advance circuit (A port) while the
pendant Up Arrow button is pressed.
To adjust pressure value (see Figure 7):
1. Verify "Auto Mode" is Off or "Set Pres" value is a minimum
100 psi (7 bar) higher than desired relief valve setting (see
section 6.1B and C for more details).
2. Loosen the relief valve locking nut and turn relief valve control
handle counter-clockwise until there is a light drag when
turning, this will decrease pressure value.
Up arrow
ON / OFF
Locking Nut
3. Start the pump to allow the oil to warm above 32 °F (0 °C).
4. Press and hold the pendant Up Arrow button to build
pressure in the advance circuit. Turn relief valve control
handle clockwise to increase pressure to desired value.
NOTE: To get an accurate setting, decrease the pressure to
a point below the final setting and then slowly increase the
pressure until it reaches the final setting.
5. Tighten the relief valve locking nut at the desired pressure
value.
6. Release the pendant Up Arrow button to allow the system
pressure to return to the B-port by-pass setting.
7. Recheck the final pressure setting by shifting the valve and
pressurizing the system.
B. Auto Cycle
Limits the pressure by automatically changing the wrench
operation from Advance to Retract at the desired pressure value.
When the Retract pressure reaches a factory-preset value of
approximately 2000 psi (138 bar), the pump automatically
changes wrench operation from Retract back to Advance. The
pump microprocessor does this by shifting the electric control
valve to redirect the pump's oil flow between ports. This
automatic wrench cycling will continue while the pendant Up
Arrow is pressed.
To activate Auto Cycle and adjust the pressure value: (see section
6.4B and C for more detail)
1. Activate Auto Cycle by displaying the "Automode" menu and
toggling the setting to "On" using the shroud arrow buttons.
Save by pressing the Menu button once.
2. Set desired Advance pressure by displaying the "Set Pres"
menu and adjusting the value by using the shroud arrow
buttons. Save and return to the "OK" display by pressing and
holding the Menu button for 2 seconds.
3. Turn on pump by pressing the pendant On/Off button.
4. Press and hold the pendant Up Arrow button to Auto Cycle
torque wrench.
5. If torque wrench does not Auto Cycle or does so erratically,
increase the User Adjustable Relief Valve setting to a
minimum value of 100 psi (7 bar) higher than desired Auto
Cycle value. (see section 5.3A for more details).
NOTE: Maximum Retract pressure (B port), also known as B port
bypass, is factory set at approximately 2500 - 2800 psi (173
- 193 bar) and cannot be adjusted.
6.0 LCD ELECTRICAL USE INSTRUCTIONS
The Torque Wrench (TW) version of the Z-Class Pump is driven
and operated by a set of two boards: the Power Board (PB) and
the Control Board (CB), connected to each other by a flat cable.
On the PB are the terminals for the main power supply, the motor
power supply and all peripherals such as fan, valve solenoids,
pendant, pressure switch, pressure transducer, oil temperature
switch, and oil level switch. The PB also contains the transformer,
circuit breaker, rectifier and drivers.
CAUTION: The CB is an electrostatic sensitive device.
Special care has to be taken while servicing this board
(i.e.: ESD wristbands).
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