Prestart Checklist - Generac Power Systems Magnum MTT25 Operating Manual

120/
208V
120/
277/
240V
480V
Switch styles vary by model.
120/ 120/
208V 240V 3PH
277/ 120/
480V 240V
1PH
Switch styles vary by model.
= Not recommended for normal use
120/
208V
120/
240V
Switch styles vary by model.

PRESTART CHECKLIST

Before starting the unit, all items in the prestart checklist must be completed. This checklist applies to both manual
and remote starting of the unit.
 Read and understand ALL safety sections at the beginning of this manual.
 Ensure all maintenance procedures are up to date. For more information, refer to
Maintenance" on page 38
 The unit must be level.
 The unit must be dry. Check for any water inside, on, or near the unit; dry if needed.
 Ensure the unit is properly grounded to a good earthen ground. Installation should be in compliance
with the National Electrical Code (NEC), state and local regulations.
 Switch the Control Power switch to the OFF (O) position.
 Switch all circuit breakers to the OFF (O) position.
 Inspect all electrical cords; repair or replace any that are cut, worn, or bare.
 Ensure all winch cables are in good condition and centered on each pulley. Do not use if cables are
kinked or beginning to unravel.
 Check oil, coolant, and fuel levels. For more information, refer to
 Ensure battery connections are secure.
 Turn the battery disconnect switch on, if equipped.
 Check the engine fan belt tension and condition.
26
120/208V 3-PHASE
120/240V 3-PHASE
4 Position Voltage Selector Switch Option
120/240V 1-PHASE
and "Basic Maintenance Schedule - Isuzu Engine" on page
L1-L2 = 208V L1-N = 120V
L2-L3 = 208V L2-N = 120V
L3-L1 = 208V L3-N = 120V
VOLTAGES AT RECEPTACLES
RECEPTACLE
GFCI
GFCI w/Buck
Twist-locks
L1-L2 = 240V L1-N = 120V
L2-L3 = 240V L2-N = 208V
L3-L1 = 240V L3-N = 120V
VOLTAGES AT RECEPTACLES
RECEPTACLE
GFCI
GFCI w/Buck
Twist-locks
L1-L2 = - L1-N = 120V
L2-L3 = - L2-N =
L3-L1 = 240V L3-N = 120V
VOLTAGES AT RECEPTACLES
RECEPTACLE
GFCI
GFCI w/Buck
Twist-locks
"General Maintenance" on page
N =
L-L L-N
- 120V
- 120V
208V 120V
00085
N =
L-L L-N
- 120V
- 120V
120V 0/120V
00086
N =
-
L-L L-N
- 120V
- 120V
240V 120V
00087
"General
40.
38.