Scheduled Maintenance - Manaras Opera MGT Installation And Instruction Manual

All power wiring to the operator should be installed by a qualified electrician and may vary with respect to conduit
size and type as specified in the National Electrical Code, Article 430, allowing 5% voltage drop. Power must also
be connected in accordance with local codes.
Minimum suggested
Wire gauge (AWG)
22
20
18
16
14
12

5. SCHEDULED MAINTENANCE

Inspection and service should be performed anytime a malfunction is observed or suspected.
WHEN SERVICING - ALWAYS DISCONNECT OPERATOR FROM POWER SUPPLY
5.1. MECHANICAL
• The door area should always be kept clear of dirt, rocks or any other substance to insure proper operation.
- Check and adjust the brake band and the solenoid, if needed.
EVERY 3 MONTHS - Check and adjust the clutch, if necessary.
- Check all safety features, if responding properly (photocells, pneumatic etc)
- Check the oil level in the gearbox.
- Lubricate all moving parts, bushings are oil impregnated and are lubricated for life.
- Verify that all mechanical parts function properly.
EVERY 6 MONTHS
- Inspect the V-belt and adjust or replace if necessary.
- Manually operate the door. If the door does not open or close freely, correct the
cause of the malfunction.
- Inspect all bolts and screws and tighten if necessary.
- Check for any excessive slack in chains and adjust or replace them if necessary. The
limit switches may have to be reset after a chain adjustment.
- Inspect the door for wear and damage.
- Run the operator a few cycles:
ONCE A YEAR
- Verify that the mooring bolts are holding the unit securely.
- Inspect the unit for evidence of corrosion.
5.2. ELECTRICAL
BEFORE OPENING THE CONTROL BOX COVER, DISCONNECT OPERATOR FROM POWER SUPPLY
• Inspect the wiring compartment and remove any dirt from the control units.
• Verify all the grounding wires and terminations for corrosion. Be particularly careful to check the ground wires.
• Check the terminal strip to insure that all the screws are tight.
• Verify that the security systems installed on the operator are fully operational.
• Verify the voltage at the input terminals while the operator is running. The voltage must not drop more than 10%
momentarily. If the voltage drop is too deep when running, the relays may chatter, the contact points will wear
prematurely and may eventually weld. Verify the power terminations for corrosion.
• Verify the current consumption of the unit with an amp-meter. The value of current should be consistent with the
nameplate specifications. Investigate any anomaly.
TABLE 2 WIRE SIZE vs. DISTANCE
24 VAC CONTROL WIRING
Maximum distance between operator and all
WARNING
Make sure that the door rollers are rolling smoothly on the track.
Listen to the motor: The motor should hum quietly and smoothly.
Verify that the limit operates quietly and smoothly: investigate any unusual noise.
13
Push-button stations feet (meters)
50 (15)
100 (30)
150 (45)
250 (75)
350 (105)
450 (135)
WARNING