Section 2 — Post Installation Start-up and Adjustments
Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators
5.Turn the speed adjust nut to obtain a frequency reading of 63 Hz.
6.When frequency is correct at no load, check the AC voltage reading. If voltage is incorrect, the volt- age regulator may require adjustment.
Figure 2.3 — Engine Governor Adjustment
Idle Spring
Governor
Shaft
(Rotate
Clockwise)
| Governor Clamp Bolt | No Load Idle |
| Adjustment Screw |
| |
6.Using a hand, push the governor arm to the closed throttle position. Make sure the idle spring does not stretch at all.
7.Restart the unit.
8.Slowly turn the idle adjust screw to adjust the no- load idle frequency to 63-63.5 Hz (with door open).
9.The governor is now set.
◆2.7.3 ADDITIONAL CORROSION PROTECTION
Periodically spray all engine linkage parts and brack- ets with corrosion inhibiting spray such as WD-40 or a comparable product.
2.8VOLTAGE REGULATOR
ADJUSTMENT
With the frequency between 62-63 Hertz, slowly turn the slotted potentiometer (Figure 2.5) until line volt- age reads 247-252 volts.
NOTE:
The access panel on top of the control panel must be removed to adjust the voltage regulator.
◆2.7.2 12 KW AND 15 KW UNITS
1.Loosen governor clamp bolt (See Figure 2.3).
2.Completely remove the idle spring.
3.With governor arm at wide open throttle position, rotate governor shaft fully clockwise. Tighten clamp bolt to 84 inch-pounds.
4.Start unit and apply full load. Use full load speed adjust screw (Figure 2.4) to adjust frequency to 58 Hz.
5.Remove load, stop engine, loosen the idle adjust screw and reconnect the idle spring.
Figure 2.4 — Full Load Speed Adjust Screw
Full Load Speed Adjust Screw
Figure 2.5 – Voltage Adjustment Potentiometer
NOTE:
The voltage regulator is housed above the genera- tor's control panel. The regulator maintains a volt- age in direct proportion to frequency at a 2-to-1 ratio. For example, at 62 Hertz, line-to-neutral voltage will be 124 volts.
Generac® Power Systems, Inc. 13
Installation
Authorized Dealer Location
Introduction
Introduction Inside Front Cover
Post Installation Start-up Adjustments
Maintenance
Troubleshooting
General Hazards
Standards Index
Electrical Hazards
UNPACKING/INSPECTION
Protection Systems
System SET LED
7 kW, Single Cylinder GH-410 Engine
Your Generator
Specifications
1.5.1 Generator
1.5.2 Engine
1 7 KW, 410CC Engine
Reconfiguring the Fuel System
Fuel Requirements Recommendations
Fuel Consumption
2.1 7 kW, 12 kW and 15 kW Units
Transfer Switch
Location
Generator
Battery
Battery Installation
Check Transfer Switch Operation
Before Initial START-UP
Electrical Checks
Checking Automatic Operation
Generator Tests Under Load
Adjusting the Regulator Natural GAS only
Engine Governor Adjustment
1 7 KW Units
2 12 KW and 15 KW Units
Voltage Regulator Adjustment
3.2.1 Auto Position
BREAK-IN Procedure
Automatic Transfer Operation
3.2.3 Manual Position
Manual Transfer Operation
Sequence of Automatic Operation
3.7.2 High Temperature Switch
Setting the Exercise Timer
3.5.2 Transfer Back to Utility Power Source
3.7.1 LOW OIL Pressure Switch
Checking the Engine OIL Level
Approximate Crank Cycle Times
3.7.4 Overspeed
4.3.1 Engine OIL Recommendations
4.3.2 OIL Change Procedure
Changing the Engine OIL
Changing the OIL Filter
Spark Plugs
Battery Maintenance
Cooling System
Adjusting GH-410/GT-990 Valve Clearance
Corrosion Protection
OUT of Service Procedure
4.12.1 Removal from Service
4.12.2 Return to Service
SYSTEM/COMPONENT Procedure Frequency
Service Schedule
Problem Cause Correction
Troubleshooting Guide
Electrical Data
Customer
Battery
Utility
Battery Charger Utility
Connection
BCR
Customer Connections Neutral
Exploded Views and Parts Lists
Part NO.QTY. Description
Exploded Views and Parts Lists
QTY Description
Exploded Views and Parts Lists
BOX GTS Load Center
Exploded Views and Parts Lists
COVER, 12 Position GTS Load Center
Kit Contains
BUSHING, Governor Lower
138 122
KNOB, AIR Cleaner
28 31
ADAPTOR, Engine
Exploded Views and Parts Lists
Stator 12KW
Exploded Views and Parts Lists
ASSEMBLY, Connecting ROD
Exploded Views and Parts Lists
SCREW, Taptite M6-1.0X8 Yellow Chrome
Engine only
Mounting Dimensions
Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators
Guardian Air-cooled 7 kW, 12 kW and 15 kW Generators
Your Warranty Rights and Obligations
MANUFACTURER’S Emission Control System Warranty Coverage
PURCHASER’S/OWNER’S Warranty Responsibilities
Emission Related Parts Include the Following
Emission Control System Warranty
This Warranty Shall not Apply to the Following
Warranty Schedule