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| Mpac Installation Manual -- Version 1.0 (9/98) |
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iii
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Introduction
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. . . . . . . . . . . . . 1
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| 1 |
Operation.
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. . . . . . . . . . . . . 2
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1.1
ANALOG
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2
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1.2
MANUAL
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2
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1.3
TWO POSITION
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3
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1.4
EMERGENCY SHUTDOWN (ESD)
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3
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1.5
SPRING FAILURE
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4
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| 2 |
Delivery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . 5
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2.1
RECEIPT
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5
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2.2
STORAGE
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5
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2.3
UNPACKING
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6
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| 3 |
Oil. .
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. . . . . . . . . . . . . 7
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3.1
LEVEL CHECK
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7
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3.2
FILLING
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7
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3.3
OIL WEEPING (THERMAL EXPANSION)
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8
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Mechanical
Installation . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . . 9
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4.1
MR SERIES (ROTARY)
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9
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4.1.1
Fail in Place Installation
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9
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4.1.2
Universal Rotary Spring Failure
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10
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4.2 ML
SERIES (LINEAR)
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11
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4.2.1
Elastic Coupling
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11
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4.2.2
Fail In Place Installation
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11
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4.2.3
Linear Spring Failure
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12
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4.3
MD SERIES (DRIVE)
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13
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4.3.1
Mounting
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13
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4.3.2
Drive Arm
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14
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4.4
CONTROL COMPARTMENT
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15
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| 5 |
Electrical
Installation. . . . . . . . . . . . . . . . . . . . |
. . . . . . . . . . . . 16
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5.1
SINGLE INPUT POWER (MAIN)
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16
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5.2
SEPARATE SOLENOID
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18
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5.3
SEPARATE HEATER
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18
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| 6 |
Control Signal.
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. . . . . . . . . . . . 19
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6.1
ANALOG CONTROL
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19
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6.2
MANUAL
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19
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6.2.1
Dry Contact Signal
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20
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6.2.2
Voltage Signal
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21
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6.3
TWO POSITION
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22
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6.3.1
Dry Contact Signal
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22
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6.3.2
Voltage Signal
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22
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6.4
EMERGENCY SHUTDOWN
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23
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| 7 |
Control Modes
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. . . . . . . . . . . . 25
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7.1
AUTO MODE
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25
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7.2
LOCAL MODE
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26
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7.3
SETUP
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26
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7.3.1
All except 115 Vac ESD Version
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26
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7.4
115 VAC ESD VERSION
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27
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| 8 |
Overcurrent
Protection (fuses) . . . . . . . . . . . |
. . . . . . . . . . . . 28
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| 9 |
Error Codes
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. . . . . . . . . . . . 31
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9.1
ONE BLINK—INCORRECT DIRECTION
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31
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9.2
TWO BLINKS—LOSS OF FEEDBACK
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31
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9.3
THREE BLINKS—STALL
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32
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9.4
FOUR BLINKS—NO CONTROL SIGNAL
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32
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9.5
FIVE BLINKS—NEGATIVE 5 VDC REFERENCE
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32
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9.6
SIX BLINKS—NO INPUT BOARD
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32
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Appendix B—Optional
Features |
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iii
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SHOCK
HAZARD: |
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Hazardous
voltage levels are present in the actuator. Only qualified servie and installation
personnel should install or adjust this device. |
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ALIGNMENT: |
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Insure
that the actuator shaft is in line with the valve plug stem. Misalignment
could damage the actuator and driven device or cause injury to installation
personnel. |
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AVOID
ACCIDENTAL STARTING: |
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When
installing the actuator, insure that line power to the unit is shut off.
When power is applied, the actuator may immediately respond to the control
signal. Inadvertent motion could damage the actuator and driven device or
cause injury to installation personnel. |
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HYDRAULIC
OIL:
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The
standard oil used in REXA actuators or drives is SAE 20W-50 motor oil. Oil
for special applications such as food grade would be noted on the serial
plate. The introduction of other fluids may cause damage to the unit. |
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SPRING
UNDER TENSION: |
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REXA
actuators, denoted by an E, R or U
in the model number, contain a spring under tension. Failure to properly
remove this force before disassembly can cause serious injury to maintenance
personnel. Contact REXA for disassembly instructions. |
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RELIEVING
INTERNAL PRESSURE: |
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When
the electric power is off (fail in place units) or the motor is not turning,
hydraulic pressure remains locked within the cylinder. This internal pressure
must be relieved before disconnecting any hydraulic fitting. Open the cylinder
bypass (3/16" hex) located on the power module for fail in place units
or remove electric power to the solenoid on spring fail units See section
3.M2 of the Trouble Shooting and Repair Manual. |
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