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14 Generac
®
Power Systems, Inc.
If the AUTO/OFF/MANUAL switch is switched
too soon, the engine may start. If engine does
start, it will shut down automatically in about
two (2) minutes.
• Set the generator main circuit breaker to its ON or
CLOSED position.
• Generator is now programmed to start and exer-
cise every seven days thereafter, on day and time of
day the switch was actuated.
• Place a sign on the generator control panel and the
transfer switch, indicating the day and time the
generator will be exercising.
NOTE:
If battery terminals are disconnected, the exercise
timer needs to be reset for correct automatic exer-
cise operation.
Figure 3.2 - “Set Exercise” Switch
3.6 ENGINE HEATER
This standby generator comes equipped with a block
heater (Figure 3.3), similar to the block heaters used
in automotive applications. The block heater is wired
to a grounded plug.
Figure 3.3 - Engine Block Heater
Refer to applicable wiring diagram(s) and electrical
schematic(s) at back of manual for wiring connec-
tions. Customer supplies a 120V 15A Utility fed cir-
cuit for the block heater.
4.1 MAINTENANCE PERFORMED BY
AUTHORIZED SERVICE FACILITIES
A. EVERY THREE MONTHS
1.Check battery state of charge and condition.
2.Inspect and test fuel system.
3.Check transfer switch.
4.Inspect exhaust system.
5.Check engine ignition system.
6.Check fan belts.
B. ONCE EVERY SIX MONTHS
1.Test Engine Safety Devices (low oil pressure, low
coolant level, high coolant temperature).
C. ONCE ANNUALLY
1.Test engine governor. Adjust or repair, if needed.
2.Clean, inspect generator.
3.Flush cooling system.
D. FIRST 100 OPERATING HOURS
1.Change engine oil and oil filter. (After initial
change, service engine oil and filter at 150 oper-
ating hours or six months, whichever comes
first.)
2.Retorque cylinder head. (See Torque Specs,
Section 1.13.)
3.Retorque intake and exhaust manifold. (See
Torque Specs, Section 1.13.)
E. EVERY 500 OPERATING HOURS
1.Service air cleaner.
2.Check starter.
3.Check engine DC alternator.
F. EVERY 800 OPERATING HOURS
1.Retorque cylinder head. (See Torque Specs,
Section 1.13.)
2.Retorque intake and exhaust manifold. (See
Torque Specs, Section 1.13.)
3.Check engine compression.
4.Check valve clearance.
!
Section 4 — Maintenance
Guardian Liquid-cooled 15 kW, 20 kW and 25 kW Generators