Generac
®
Power Systems, Inc.
33
3.1
POST INSTALLATION TESTS
The air cooled Impact-36 plus II generator set was
factory tested and adjusted using gasoline as fuel.The
air cooled Impact-34 plus II generator set was factory
tested and adjusted using LP gas as fuel. It is not
required to adjust the unit any further except under
special circumstances.
Do not make any unnecessary adjustments.
Factory settings are correct for most applica-
tions. When making adjustments, however, be
careful to avoid overspeeding the engine.
3.2
BEFORE INITIAL START UP
Before starting, complete the following:
1. Check engine crankcase oil level and, if neces-
sary, fill to dipstick FULL mark with the recom-
mended oil. Do not fill above FULL mark.
2. Check the fuel supply. Gas fuel lines must have
been properly purged and leak tested in accor-
dance with applicable fuel codes. All fuel shutoff
valves in the fuel supply lines must be open.
If an LP (propane) gas fuel system has been
installed, it must have been properly tested
for leaks before operating the system in com-
pliance with ANSI A119.2/NFPA 501C. No leak-
age is permitted. Be sure no gaseous fuel
vapors enter the vehicle interior.
3.3
INITIAL START
When absolutely certain that the unit has been prop-
erly installed and prepared for use, start the engine
as follows:
1. Turn off all electrical loads. Do this by setting the
generator main circuit breaker to its “OFF” or
“OPEN” position.
2. Refer to the Owner's Manual shipped with unit for
cranking and starting instructions. The engine
may require more cranking for initial starting
since the fuel lines have to be primed (Use of the
Primer Switch on gasoline units will shorten this
time).
3. Let the engine warm up for about five minutes to
allow internal temperatures to stabilize.
4. Carefully inspect the engine-generator for fuel, oil
and exhaust system leaks. Before proceeding to
the next step, correct any leakage immediately.
5. When all tests and adjustments at no-load are
completed, apply electrical loads and check for
proper operation under load. See “Testing Under
Load”, Section 3.4. Run the unit at least 30 min-
utes with loads applied.
6. Turn off all electrical loads by setting the genera-
tor main circuit breaker to “OFF” or “OPEN.”
7. Let the unit run at no-load for a few minutes to
stabilize internal engine-generator temperatures.
Then, shut down the engine.
IMPORTANT: THE GENERATOR SET WAS THOR-
OUGHLY TESTED AND ADJUSTED AT THE FAC-
TORY BEFORE SHIPPING. NO ADDITIONAL
ADJUSTMENT SHOULD BE NECESSARY. ONLY
QUALIFIED SERVICE TECHNICIANS WHO HAVE
BEEN TRAINED SHOULD PERFORM ADJUST-
MENTS OUTLINED IN THIS MANUAL.
3.4
TESTING UNDER LOAD
Apply electrical loads equal to about 75-100% of the
unit's rated wattage/amperage capacity.
Let the unit run at least 30 minutes with load
applied. During this part of the test, check that the
unit is not running excessively hot and that adequate
cooling air flow is available. Do not allow the unit to
overheat during prolonged operation.
NOTE:
The generator engine is equipped with a high tem-
perature switch. The switch has normally-open
(N.O.) contacts. When the temperature is too high,
switch contacts close, and engine shuts down
automatically.
IMPORTANT: GENERAC RECOMMENDS THAT
THE GENERATOR IS TESTED FOR ADEQUATE
COOLING.
DANGER
!
Section 3 – Post-installation Start-up Checks
IMPACT-36 plus II Recreational Vehicle Generator
CHECKS
