Frequency Meter; Oil Pressure Gauge; Coolant Temperature Gauge; Dc Ammeter - Generac Power Systems GR-210 Operation And Maintenance Manual

FREQUENCY METER

Indicates generator AC output frequency in "Hertz"
(cycles per second). The generator's rated AC frequency
is 60 Hertz, which is supplied at 1800 rpm. The engine
governor was factory adjusted at no-load to about 1860
rpm or 62 Hertz. Maximum droop with the generator
fully loaded should not be below about 58 Hertz. While
operating, normal frequency is between 58-62 Hertz.
NOTE: The engine automatically shuts down and the
fault indicator light goes ON if frequency exceeds about
74 Hertz (2220 rpm). This is an "overspeed" condition.

OIL PRESSURE GAUGE

Indicates engine oil pressure.

COOLANT TEMPERATURE GAUGE

Indicates engine coolant temperature. Coolant tempera-
ture during unit operation is about 170°-200°F . If the
coolant temperature exceeds about 250°F , the engine
automatically shuts down and the fault indicator light
goes ON.

DC AMMETER

The engine is equipped with a belt-driven DC alternator
which maintains battery state of charge while the unit is
running. This ammeter indicates rate of charge to the
battery while operating.
• Immediately after startup, the DC ammeter needle
may swing to the right of zero (+ - charging) but
should drop to zero or just slightly to the right of
zero (+) within a few minutes.
• If the needle drops to the left of zero (or —), battery
is discharging. Investigate and correct this problem
immediately.
• If the ammeter needle fluctuates, investigate and
correct immediately. Disconnect battery and control
panel fuse prior to working on unit.

HOURMETER

Provides a continuous indication of engine-generator
operating time, in hours and tenths of hours. Use the
hourmeter with the periodic maintenance schedule (See
"Maintenance" section, page 17).
GR-210 Generator Set

SYSTEM READY LAMP

This lamp goes ON when the unit is running. The lamp
will not go ON if a fault has occurred and you have not
set the Start/Run/Off switch to OFF to reset.

PRE-HEAT SWITCH

This engine comes with INTAKE AIR HEATERS to heat
the combustion chamber air for quicker and easier
starts. Prior to starting a cold engine manually, hold the
PREHEAT switch for about 15 seconds. DO NOT PRE-
HEAT FOR MORE THAN 30 SECONDS.
FAULT INDICATOR
The lamp goes on if any one or more of the following
automatic shutdown faults occurs:
• High coolant temperature (above about 250°F).
• Low coolant level.
• Low engine oil pressure (below 10 psi).
• Overspeed above about 74 Hz (2220 rpm).
• Overcrank

START/RUN/OFF SWITCH

To crank and start the engine, hold the Start/Run/Off
switch at "Start". When engine starts and runs at rated
frequency, release the switch to its center (Run) posi-
tion. To shut engine down, set the switch to the "Off"
position.

AUTO/OFF/MANUAL SWITCH

This safety switch should be used to prevent automatic
startup of the engine when working on the engine-gen-
erator. Use the switch as follows:
• AUTO Position: Always set switch to AUTO for auto-
matic system operation. This means when this gen-
erator is installed along with a GTS type automatic
transfer switch, the generator automatically cranks
and starts when the utility source voltage drops
below a preset level.
• OFF Position: Engine cannot be started either auto-
matically or manually. Always set switch to OFF
before working on or around the engine-generator.
• MANUAL Position:
started manually using the panel Start/Run/Off
switch. Engine will not start automatically.
Generac
Operation
Engine can be cranked and
Power Systems, Inc. 11
®