Product Manual

Milbank Manual Transfer Switch Owner’s and Installation Manual 11
OPERATION & INSTALLATION
MMTS WIRING DIAGRAM
Utilizing a portable generator, your Manual Transfer Switch
will power to selected circuits in the event that utility power
is interrupted. The MMTS normal operation is to connect
the Utility to the selected circuits using the internal Load
Subpanel. The MMTS system can manually switch up to 8 AC
circuits when operating on generator power. MMTS301SYS
and MMTS501SYS systems monitors and displays power
being consumed by the selected circuits, using Light Emitting
Diodes (LED’s), to allow the home owner to manually control
the loads on the generator. A survey of power usage of the
selected circuits should be performed to achieve the desired
performance from the portable generator.
After unpacking inspect the Manual Transfer Switch for any
damage that may have occurred during shipping. If any
missing parts or damage is discovered when unpacking, do
not return the unit to the place of purchase; please contact
Milbank Technical Services for instructions on how to
proceed. Never install a Manual Transfer Switch that has been
damaged.
The MMTS enclosure is NEMA type 3R rated and is suitable
for indoor or outdoor installations.
Guidelines for mounting the unit include:
• Ensure that mounting surface can support the 25 pound
weight of the MMTS and adheres to all local codes
• The enclosure must be installed with NEMA type 3R
hardware and connections
• Level and plumb the unit enclosure to prevent deformation
• Never install the MMTS where any corrosive substance may
come in contact with the enclosure
• Protect the MMTS at all times against excessive moisture,
dust, dirt, lint, construction grit and corrosive vapors
• An optional inlet box can be used to permit installing the
generator outside while installing the MMTS inside next to
the Main distribution panel/ load center
UNPACKING AND HANDLING
Figure 1 – Manual Transfer Switch Diagram
The schematic shows the internal wiring of
the MMTS with the Manual Transfer Switch
Indicator Printed Circuit Board (MTSI PCB)
assembly. The MTSI PCB uses 2 current
transformers to acquire power for the
monitoring circuitry and to measure power
in each line of the input power. Each circuit
being monitored must have the circuit wire
pass through the A or B current transformer.
If this is not done the monitoring will not
function. If additional circuits are added to
the MMTS, make sure that the wire to the
new circuit breaker is passed through the
appropriate current transformer.