Generac Power Systems 53187 - Manual (Page 53)

PARTI
THE REVOLVING FIELD AC GENERATOR
1
SECTION 1.9
OPERATIONAL TESTS & ADJUSTMENTS
Section 1.9
OPERATIONAL TESTS AND ADJUSTMENTS
Introduction
Follow ing m ajor m aintenance, an operational test
of the generator should be conducted. Any required
adjustm ents should be com pleted at this tim e. Opera­
tional testing m ay be accom plished on either an in­
stalled or uninstalled generator.
Preparation Before Operation
Before you attem pt to crank or start the generator,
be sure to check the follow ing:
□ Check engine oil level.
□ Check engine coolant level.
□ Check fuel supply.
□ Check cooling air flow .
CHECK ENGINE OIL LEVEL:
Rem ove the engine dipstick and w ipe end w ith a
clean, lint-free cloth. Insert dipstick again and check oil
level. Add the recom m ended oil, if necessary, to the
dipstick
"FULL" m ark only. DO NOT OVERFILL
ABOVE THE "FULL" MARK. NEVER OPERATE THE
ENGINE
W ITH OIL LEVEL BELOW THE "ADD"
MARK.
Engine oil capacity w ithout oil filter change is 3.7
U.S. quarts; w ith oil filter change, capacity is 4.0 U.S.
quarts.
Use a high quality detergent oil classified "For
Service CC or CD". Detergent oils keep the engine
cleaner and reduce carbon deposits. Use oil having the
follow ing SAE (Society of Autom otive Engineers) vis­
cosity rating, based on the am bient tem perature range
anticipated before the next oil change:
AMBIENT TEMPERATURE RECOMMENDED SAE VISCOSITY
Above 100’ F.
40MOO' F.
Below 40‘ F.
Use SAE 4tTo1l
SAE10W-30orSAE30 0ll
SAE SW-20 or SW-30 Oil
CHECK COOLANT LEVEL:
Som e generator m odels w ill be equipped w ith a
rem ote m ounted radiator, som e m odels w ith a unit-
m ounted radiator. Before starting, be sure to check the
coolant level in the radiator as w ell as the coolant
recovery bottle.
Recom m ended coolant is a 50-50 m ixture of ethyl­
ene glycol base anti-freeze and soft w ater. Use only a
low silicate type anti-freeze. W hen adding coolant,
alw ays add the recom m ended 50-50 m ixture.
CHECK FUEL SUPPLY:
Recom m ended fuel is a high quality, autom otive
type DIESEL fuel conform ing to JIS No. 2D diesel fuel.
The fuel supply m ust be kept CLEAN.
CHECK COOLING AIR FLOW ;
If the generator is installed, m ake sure all cooling
air inlet and outlet openings are open and unot^
staicted. W ithout adequate cooling air flow , the unit w ill
quickly overheat and cause problem s.
Starting the Engine
Before startup, turn OFF all electrical loads. Initial
tests and adjustm ents are accom plished w ith the unit
at no-load. To crank and start engine, hold the engine's
startfstop sw itch at START. Release the sw itch w hen
the engine starts. Let the engine stabilize and w arm up.
Operational Tests
PRELIMINARY CHECKS:
W hen the engine has stabilized and w arm ed up,
check all gauge and instrum ent readings available (oil
pressure, coolant tem perature, DC voltm eter, AC volt­
age, AC frequency).
NO TE: Som e Installations m ay Include a gauge and
m eter panel. See Part S, Section 5.8, "REM OT E
PANELS AND CABLES".
Listen to the engine-generator w hile it is running.
Unusual noises should be investigated and corrected.
If the exhaust system is defective, shut dow n and
com plete the necessary repairs.
DANGER: ENGINE EXHAUST GASES CONTAIN
DEADLY CARBON MONOXIDE GAS. CARBON
MONOXIDE IS AN ODORLESS AND COLOR­
LESS GAS THAT IS FORMED DURING THE
COMBUSTION OF HYDROCARBON FUELS. DO
NOT OPERATE THE GENERATOR IF ITS EX­
HAUST
SYSTEM IS DAMAGED OR LEAKING.
EXHAUST FUMES, IF BREATHED IN SUFFI­
CIENT CONCENTRATIONS, CAN CAUSE UN­
CONSCIOUSNESS OR EVEN DEATH. PROVIDE
ADEQUATE VENTILATION TO PREVENT THIS
DANGEROUS GAS FROM ACCUMULATING.
Inspect the engine carefully for signs of oil, fuel or
coolant leaks. No leakage should be perm itted.
CHECK AC OUTPUT VOLTAGE & FREQUENCY:
W ith the engine running at no-load, use an accu­
rate AC voltm eter and frequency m eter to check volt­
age and frequency output. Record all readings for
future reference. Frequency should bo 60.5-63.5 Hertz.
Line-to-neutral voltage should be 121-127 volts AC;
line-to-line voltage should be 242-254 volts AC at no-
load. Setting the no-load frequency slightly high helps
S revent excessive rpm and frequency droop under
eavy electrical loading.
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