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18 Generac
®
Power Systems, Inc.
4.10.2 Rodent Protection
The intrusion of rodents into the generator set can
cause a wide range of problems, from failure of the unit
to start, to personal injury and, in extreme circum-
stances, short circuit or fire. Although the unit was
designed to limit this problem, further precautions can
be taken by the owner to help minimize both the chance
of rodent entry and the extent of any damage. The fol-
lowing inspection should be performed.
1. The base frame of the unit contains an optional fuel
inlet location and four lifting holes that are capped at
the factory. These caps are sometimes removed for
transportation during installation but always should
be replaced afterwards. Check that they are secured in
place. The same applies for any access ports in the
roof of the enclosure. If any of these caps are missing,
contact a Generac/Guardian Authorized Dealer.
2. Inside the generator set, the chance of rodent entry
into the control panel is greatly reduced by the inclu-
sion of adjustable wire connectors. Check that the
wire connector screws are tight, thus closing off any
gap between the access holes and the wires.
4.11 OUT OF SERVICE PROCEDURE
4.11.1 Removal From Service
If the generator cannot exercise every seven days, and it
is to be out of service longer than 90 days, prepare the
generator for storage as follows:
1. Start the engine and let it warm up.
2. Close the fuel shutoff valve in the fuel supply line
and allow the unit to shut down.
3. Once the unit has shut down, it will signal a fault on
the control panel.
4. Set the Auto/Off/Manual switch to OFF and turn off
the utility power to the transfer switch.
5. While the engine is still warm from running, drain
the oil completely. Refill the crankcase with SAE
15W-40 oil having API Service Class SG, SH or SJ.
6. Attach a tag to the engine indicating the viscosity
and classification of the oil in the crankcase.
7. Remove the spark plug(s) and spray fogging agent
into the spark plug(s) threaded openings. Reinstall
and tighten the spark plug(s).
8. Remove the battery and store it in a cool, dry room
on a wooden board. Never store the battery on any
concrete or earthen floor.
9. Clean and wipe the entire generator.
4.11.2 Return To Service
To return the unit to service after storage, proceed
as follows:
1. Verify that utility power is turned off to the transfer
switch and that the Auto/Off/Manual switch is set to
OFF.
2. Check the tag on the engine for oil viscosity and
classification. Verify that the correct recommended
oil is used in engine. See Section 4.2.1 (Page 14). If
necessary, drain and refill with the proper oil.
3. Check the battery. Fill all cells to the proper level
with distilled water. DO NOT USE TAP WATER IN
THE BATTERY. Remove the battery before charging.
Recharge the battery to 100 percent state of charge,
or, if defective, replace the battery with a 12-volt DC
Group 27F battery rated for 90 amp hours (part #
058665).
4. Clean and wipe the entire generator.
5. Reconnect the battery. Observe battery polarity.
Damage may occur if the battery is connected incor-
rectly.
6. Open the fuel shutoff valve.
7. Start the unit by moving the Auto/Off/Manual switch
to MANUAL. Allow the unit to warm up thoroughly.
8. Stop the unit and set the Auto/Off/Manual switch to
AUTO.
9. Turn on the utility power to the transfer switch.
10. The generator is now ready for service.
Section 4 — Maintenance
Guardian Liquid-cooled 40 kW Generator