Derating For Altitude; Generator Output Connection Lugs - Generac Power Systems MAGNUM MMG25IF4 Operating Manual

and information on isolating the generator with a transfer switch if the unit is to be used as a standby power supply.
See Transfer Switch, then continue with the steps described below:
1. Perform a manual start of the unit to verify the engine is operating correctly.
Remove the wires from the remote start terminal block to check the remote start circuit. Press the Auto/
2.
Manual Mode ( ) button, the LCD window should show "Auto Mode" at the top of the screen. Attach a
jumper wire (minimum 16 gauge) across the two terminals on the remote start terminal block. This applies a
ground to the Power Zone™ Controller to close the starting circuit contacts. The engine should crank, start
and run.
Remove the jumper wire from the remote start terminal block and the engine will stop. Reconnect any nec-
3.
essary wires from the remote start switch (transfer switch) to the remote start terminal block.
Verify the unit is in Auto mode. The LCD window should show "Auto Mode" at the top of the screen.
4.
Close the main circuit breaker (set to ON (I)).
5.
Secure unit by closing and locking all access doors.
6.
The unit is now ready for remote starting.
7.
The remote start terminal block provides a connection for installation of a remote start
switch which will allow the unit to be started by a remote dry-contact closure switch.
For location of the remote start terminal block, refer to
Before entering Auto mode, verify the contacts on any remote switch linked to the unit are OPEN. If the contacts on
a remote switch are closed, the engine will crank and start when Auto mode is entered. Attach the switch leads to
the two unused terminals on the unit's remote start terminal block. For additional information, refer to
Starting of the Unit.

DERATING FOR ALTITUDE

All units are subject to derating for altitude and temperature; this will reduce the available power for operating tools
and accessories connected to the receptacles. Typical reductions in performance are 0.5% for every 1000 ft (305
m) and 2-4% for every 1000 ft (305 m) above 10,000 ft (3048 m) of elevation, and 1% per 10ºF (5.6ºC) increase in
ambient air temperature over 72ºF (22ºC).

GENERATOR OUTPUT CONNECTION LUGS

The unit is equipped with connection lugs, located on the lower portion of the control box behind the lug box door
on the right side of the unit. The lugs provide connection points for attachment of external loads to the generator. A
large decal on the inside of the control door details the proper connections for selected voltages.
Only a trained and licensed electrician perform any wiring and related connections
to unit. Failure to follow proper installation requirements could result in death, serious
Before any connections are made to the generator, verify the main circuit breaker
and the Control Power switch are OFF (O). Potentially lethal voltages may be present
36949 B
WARNING
injury, and damage to equipment or property. (000155)
WARNING
at the generator connection lugs.
MMG25I-35D-45I-55DF4 Operating Manual
Control Panel.
Operation
Remote Start
Switch Terminals
00886
Figure 3-3. Remote Start
Terminal Block
Auto (Remote)
25