Electric Company Water Heater User Manual

2-8 Installation & Operation MN1800
LMCF Series Brushless Linear Cog Free Servo Motor
1. Install the coil and magnet assemblies. While mounting the coil, be sure to
adjust coil assembly so it is centered within the magnet assembly with equal air
gap in the vertical and horizontal positions. See Figure 2-6.
2. Verify that the coil assembly is centered within the magnet assembly with equal
air gap in the vertical and horizontal positions along its entire length of travel.
The coil assembly must never be allowed to touch the magnets at any point
from one end of travel to the other.
Note: For modular magnet mounting, magnets are mounted end–to–end without
spacing. The mounting hole pattern is repeating and is unaffected by magnet
segments. Hole pattern repeats across joining ends of magnets.
Multiple Coil Assembly Operation
In addition to maintaining an air gap, multiple coil assemblies must also maintain a
spacing factor of 2.4″. In other words, the space between coil assemblies may vary,
however, the distance from the front end of the first coil assembly to the front end of the
next must be a multiple of 2.4″. See Figure 2-6.
Ensure that this factor is established at the time of installation.
Figure 2-6 Air Gap Spacing
Horizontal Air Gap
Vertical Air Gap
Magnet Assembly
Mounting Plate
Coil Assembly
Vertical Air Gap
Horizontal Air Gap
Machine Base
Operation Considerations The motor must always be operated within the specified operating parameter limits.
Exceeding those limits will permanently damage the motor.
The motor must never touch the magnets during operation. Equal horizontal and vertical
air gap must be maintained.
Remove the shim that sets the air gap between the motor and the magnets prior to
operation.
Note: Be aware that the total bearing load includes the magnetic attractive force.
The following steps must be completed to ensure safe and proper operation.
1. Verify that all electrical wiring and cables are properly connected. Refer to the
manual provided with the control for this information.
2. Adjust the servo drive current to match the motor’s current specification.
3. Refer to the motor specifications for operating parameters. Adjust the control
parameters as necessary to the motor data specifications.
4. Adjust the control for the proper P.I.D. loop tuning. Begin at a low gain setting
and increase the gain as necessary.
5. Strain relieve the wires prior to operating.
AY1763A00 Leadwire Connection
Motor Cable Hall Cable Limit Cable
Wire Color
Signal Name
LinDrive Trap
Signal Name Wire Color Signal Name Wire Color
Motor Phase A (U) Red Black Hall 1 White Limit + Output White
Motor Phase B (V) White Red Hall 2 Red Limit – Output Red
Motor Phase C (W) Black White Hall 3 Black Home Output Black
Motor Ground Green Hall Ground Green Limit & Home PWR * Brown
Thermal Switch+ Blue Hall +5VDC Brown Limit & Home GND Green
Thermal Switch– Orange
* Limit & Home power is +4 to +24VDC.
Note: Motor phasing is for LinDrive or MintDrive. Other controls may require different phasing (such as most trap
drives (U) Black, (V) Red, (W) White). Phase angle between phases is 120 degrees.