Sterling GG-120 User Manual

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TABLE OF CONTENTS
The following terms are used throughout this manual, in addition to the ETL requirements to bring attention to the 
presence of potential hazards, or to important information concerning the product:
 Indicates an imminently hazardous 
situation which, if not avoided, will result in 
death, serious injury, or substantial property 
damage.
                                                                                 
                               
 Indicates an imminently hazardous 
situation which, if not avoided, could result in 
death, serious injury, or substantial property 
damage.
 Indicates an imminently hazardous 
situation which, if not avoided, may result in minor 
injury or property damage.
NOTICE: Used to notify of special instructions on 
installation, operation, or maintenance which are 
important to equipment but not related to personal 
injury.
SPECIFICATIONS
 
Basic Description  .................................................... 2
 
Performance & Specifi cation Data  ...................... 4, 5
GENERAL SAFETY INFORMATION
 
Installation Codes  ............................................... 2, 3
 
Special Precautions  ............................................ 2, 3
INSTALLATION
 
Locating Units  ..................................................... 6, 7
 
Combustion Air  ................................................... 6, 7
 
Proper Clearances  .............................................. 6, 7
 
Suspension of Units  ............................................ 6, 7
 
Gas Supply Piping  .............................................. 8, 9
ELECTRICAL CONNECTIONS  ............................10-15
VENTING
 General 
.............................................................16-17 
 
Standard Combustion  ......................................18-25
 
Separated Combustion  ....................................26-30
OPERATION
 
Explanation of Controls and Operation .................. 31 
 
Main Burner Orifi ce Schedule  ............................... 32
 Adjustments 
 
.......................................................... 32
 
High Altitude Operation  .................................. 32, 33
MAINTENANCE
 
Servicing & Cleaning  ............................................ 33
TROUBLESHOOTING GUIDE  .............................34-38
IDENTIFICATION OF PARTS  .............................. 39, 40
WARRANTY ............................................................... 41
MODEL NUMBER  ..................................................... 42
INSPECTION SHEET ................................................. 43
        
See Identifi cation of Parts throughout this manual.
DESCRIPTION
The Residential Tubular Gas Fired Unit Heater is a 
factory assembled, power vented, low static pressure 
type propeller fan unit heater designed to be suspended 
within the space to be heated. THESE HEATERS ARE 
NOT TO BE CONNECTED TO DUCTWORK. These 
Tubular Unit Heaters are design certified under ANSI 
Z83.8 for Industrial/Commercial use and IAS .10.96 U.S. 
NOTICE: It is the equipment owners responsibility to provide any scaffolding or other apparatus required to 
perform emergency service or annual/periodic maintenance to this equipment.
(2nd ed.) “Unit Heaters for Residential Installation”. The 
designs are certified by ETL as providing a minimum 
of 80% thermal efficiency, and approved for use in 
California. Do not alter these units in any way. If you 
have any questions after reading this manual, contact 
the manufacturer.
Figure 1 - Tubular 30 thru 120 Propeller Unit Heaters
GG120
GG030