Operation
20
MDG20IF4-MLG20IF4 Operating Manual
37100 B
Figure 17 - Transfer Switch Operation
DANGER
FAILURE TO ISOLATE THE GENERATOR FROM THE NORMAL POWER UTILITY CAN
CAUSE POTENTIALLY LETHAL VOLTAGE TO BACKFEED INTO THE UTILITY LINES.
THIS MAY RESULT IN INJURY OR ELECTROCUTION OF UTILITY WORKERS NEARBY.
MAKE SURE THE GENERATOR IS ISOLATED BY A TRANSFER SWITCH FROM ANY
LOCAL UTILITY LINES. THIS ALSO APPLIES IF THE GENERATOR IS BEING USED
AS A BACKUP TO SOME OTHER TYPE OF POWER SUPPLY.
Installation of a transfer switch or other type of remote starting device is the responsibility of the user. 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.
WARNING
ONLY a licensed electrician should perform wiring and related connections to the
generator. Installation should be in compliance with the National Electrical Code
(NEC), state and local regulations. Failure to follow these procedures could result in
property damage, personal injury or death. Before any connections are attempted,
make sure 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.
When using the unit as a standby or substitute power supply, make sure the output voltage
and phase rotation of the generator match those of the local power utility. Improper voltage
or phase rotation may cause equipment damage or malfunction.
AUTO EXERCISE TIMER
The Power Zone™ Light 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. Use the following procedures to operate the unit in Auto mode:
Incoming
Utility
Power
Utility
Meter
Transfer
Switch
Main
Distribution Panel
(Utility Power)
Emergency
Distribution Panel
(Generator Power)
Power From
Generator
WHITE = Incoming
Utility Power
GRAY = Normal Utility
Power Circuit
BLACK = Emergency
Generator Power Circuit
00206
Discount-Equipment.com