ML7999A UNIVERSAL PARALLEL-POSITIONING ACTUATOR
65-0239—2
4
Mounting the ML7999 Actuator on V5197A
Firing Rate Gas Valve. (Fig. 2)
WARNING
Explosion Hazard and Electrical Shock Hazard.
Can cause severe injury, death or property
damage.
1. Turn off gas supply before starting installation.
2. Disconnect power supply for valve actuator before
beginning installation and wiring. More than one
disconnection can be involved.
1.
Attach the mounting bracket for the ML7999 Actuator
(supplied with the V5197 Valve) in the position that best
suits the valve location, access space and wiring
requirements.
2.
Place the short end of the V5197 valve drive stem in the
top of the V5197 Valve drive so that the rectangular
portion of the drive stem is inside the valve drive.
3.
Mount the ML7999 Actuator on the V5197 Valve and
secure the actuator to the mounting bracket with the
supplied screws.
4.
Wire the ML7999 Actuator per the instructions in the
Wiring section.
5.
Restore power to the system.
Fig. 3. Mounting ML7999.
Fig. 4. Mounting ML7999 with mounting
bracket accessory.
WIRING
WARNING
Electrical Shock Hazard.
Can cause severe injury or death.
Disconnect power supply before installation.
All wiring must comply with local electrical codes, ordinances
and regulations. The ML7999 is designed for used with a
Class 2 power supply for low voltage. Voltage and frequency
of the transformer must correspond with the characteristics of
both the actuator and the power supply.
Earth Ground
Earth ground is required for proper operation of the
ControLinks™ system. Earth ground provides a connection
between the subbase and the control panel of the equipment.
The earth ground must be capable of conducting enough
current to blow the fuse or breaker in the event of an internal
short.
1.
Use wide straps or brackets to provide minimum length,
maximum surface area ground conductors. If a leadwire
must be used, use 14 AWG copper wire.
2.
Make sure that mechanically tightened joints along the
ground path are free of nonconductive coatings and
protected against corrosion on mating surfaces.
Shield Ground
Connect the shield ground of the ML7999 Actuator(s),
Remote Reset, Manual Potentiometer, Controller 4-to-20 mA
and Auxiliary 4-to-20 mA inputs to the earth ground strip
provided in the Q7999 Universal Subbase. Connect the shield
at the controller end only. See Fig. 6.
Preparation
Use OEM-supplied 1/2 in. conduit connectors in the low- and
line- voltage base openings; the motor has separate line- and
low-voltage wiring compartments. Use Belden 9535,
5-conductor, 100% shield coverage, 300V, 80°C (UL2464,
CSA PCC FT4), or equivalent for low voltage wiring.
Wiring Procedures
IMPORTANT
Device must be hardwired.
1.
Remove the cover from the actuator.
2.
Pull back the snap-locks while opening the low-voltage
compartment. See Fig. 5.
3.
Wire the low-voltage circuit to the R7999. See Fig. 6 for
typical wiring connections.
4.
Close the low-voltage compartment.
5.
Wire the line-voltage circuit. See Fig. 6 for typical wiring
connections.
6.
Replace the cover on the actuator.
M16467A
LOCK WASHER OR
CAPTIVE NUT
(NOT PROVIDED)
M16468A
LOCK WASHER OR
CAPTIVE NUT
(NOT PROVIDED)
Содержание ML7999A
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