Product Manual

30 Owner’s Manual for MDG25IF4
Operation
NOTE: The main circuit breaker only interrupts power to
the connection lugs and the optional cam lock
receptacles. The customer convenience receptacles
have power even if the main circuit breaker is OFF (O).
Use the individual circuit breakers located near each
receptacle to disconnect power to these receptacles.
Transfer Switch
The installation should be in compliance with the National
Electrical Code (NEC), state, and local regulations.
Before any connections are attempted, verify the main
circuit breaker and the control power switch are in the
OFF (O) position and that the negative (-) battery cable
has been disconnected from the battery.
Installation of such devices must be performed by
following all directions supplied by the manufacturer of
the switch. If attaching the unit to a power supply
normally serviced by a utility company, notify the utility
company and check state and local regulations.
Familiarize yourself with all instructions and warning
labels supplied with the switch.
When the unit is used as a standby power supply, it must
be equipped with a transfer switch that isolates it from the
utility’s distribution system. A transfer switch is designed
to transfer electrical loads from the normal power source
(utility) to the emergency power source (generator) when
normal voltage falls below a prescribed level. The
transfer switch automatically returns the load back to the
normal source when power is restored back to operating
levels.
Figure 3-10. Transfer Switch Operation
AUTO Exercise Timer
The PowerZone controller is capable of starting and
stopping the unit automatically, based on a
programmable schedule.
Units installed in a standby application should be
exercised regularly to maintain operating condition and to
ensure responsiveness in an emergency situation.
Proceed as follows to operate the unit in AUTO mode:
Accessing the Configuration Menu
1. With the unit stopped, press ▲, ►, ▼, or ◄ to
navigate to the maintenance screens from any of
the operator screens.
2. While on any maintenance screen, press  and O
simultaneously. The controller will display the
Configuration menu.
3. To save any changes and exit the Configuration
menu, press and hold  for five seconds. To cancel
any changes and return to the maintenance
screen, press and hold O for five seconds.
(000190)
DANGER
Loss of life. Property damage. Installation must always
comply with applicable codes, standards, laws and
regulations. Failure to do so will result in death
or serious injury.
(000237)
DANGER
Electrical backfeed. Use only approved switchgear to
isolate generator from the normal power source.
Failure to do so will result in death, serious injury,
and equipment damage.
(000155a)
WARNING
Electric shock. Only a trained and licensed electrician
should perform wiring and connections to unit. Failure
to follow proper installation requirements could result in
death, serious injury, and equipment or property damage.
(000226b)
Electric shock. Phase rotation must be compatible.
Incompatible phase rotation could result in death,
serious injury, or equipment damage.
WARNING
A Incoming utility power
B
Emergency distribution panel (generator
power)
C Main distribution panel (utility power)
D Transfer switch
E Power from generator
F Utility meter
WHITE Incoming utility power
GRAY Normal utility power circuit
BLACK Emergency generator power circuit
A
B
C
D
E
F
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