Roberts Gorden Tubular Unit Heaters 300 - Manual (Page 3)

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TABLE OF CONTENTS
SECTION 1: Heater Safety...................................................... 1
1.1 Manpower Requirements ............................................. 1
SECTION 2: Installer Responsibility ..................................... 2
2.1 Wall Tag ....................................................................... 2
2.2 Corrosive Chemicals.................................................... 2
2.3 National Standards and Applicable Codes .................. 2
SECTION 3: Critical Considerations ..................................... 3
3.1 Basic Information ......................................................... 3
3.2 Location and Suspension ............................................ 3
3.3 Minimum Required Installation Clearances ................. 3
3.4 Clearances to Combustibles ........................................ 3
3.5 Ventilation .................................................................... 3
3.6 Gas Supply .................................................................. 3
3.7 Electrical Supply .......................................................... 3
3.8 Vent.............................................................................. 3
3.9 Separated Combustion Installation .............................. 3
SECTION 4: National Standards and Applicable Codes ..... 5
4.1 Gas Codes................................................................... 5
4.2 Aircraft Hangars ........................................................... 5
4.3 Parking Structures and Repair Garages ...................... 5
4.4 Electrical ...................................................................... 5
4.5 Venting......................................................................... 5
4.6 High Altitude ................................................................ 5
SECTION 5: Major Components ............................................ 6
5.1 General ........................................................................ 6
5.2 Suspension .................................................................. 6
SECTION 6: Venting................................................................ 7
6.1 Venting......................................................................... 7
6.2 Vent Installation ........................................................... 7
6.3 Unvented Operation..................................................... 8
6.4 Horizontal Venting........................................................ 8
6.5 Vertical Venting ............................................................ 8
6.6 Length Requirements .................................................. 8
6.7 Vent Material................................................................ 9
SECTION 7: Air Supply......................................................... 13
7.1 Separated Combustion Installation............................. 13
7.2 Unvented Installation .................................................. 13
7.3 Building Ventilation ..................................................... 13
7.4 Outside Combustion Air Supply.................................. 13
SECTION 8: Gas Piping ........................................................ 14
8.1 Connections............................................................... 14
SECTION 9: Wiring................................................................ 15
9.1 Positioning Thermostats ............................................ 15
9.2 Low Voltage Thermostat with One Heater ................. 15
9.3 UHA[S] Series Internal Wiring Diagram..................... 16
9.4 UHA[S] Series Ladder Wiring Diagram...................... 17
9.5 Electrical Connection to the Heater ........................... 18
SECTION 10: Operation and Maintenance.......................... 19
10.1 Pre-Start-Up Checks ................................................ 19
10.2 Begin Start-Up ......................................................... 19
10.3 Complete the Start-Up ............................................. 21
SECTION 11: User Instructions............................................22
11.1 User Instructions .......................................................22
11.2 Heater Operation ......................................................22
11.3 Lighting Instructions ..................................................22
11.4 Simple Troubleshooting.............................................22
SECTION 12: Servicing.........................................................24
12.1 Servicing Instructions...............................................24
12.2 Burner Maintenance.................................................24
12.3 Fan/Motor Assembly Maintenance ...........................24
12.4 Heat Exchanger Maintenance ..................................24
12.5 Gas Valve Maintenance ...........................................24
12.6 Flue Blower ..............................................................24
12.7 Venting and Air Intake Pipe ......................................24
12.8 Maintenance Checklist .............................................25
SECTION 13: Troubleshooting .............................................27
13.1 General ....................................................................27
13.2 Troubleshooting For Automatic Ignition
Burner Systems .......................................................28
13.3 Troubleshooting for Flame Supervision System .......29
13.4 Troubleshooting for Gas Valves ................................30
13.5 Troubleshooting for Flue Blower ...............................30
SECTION 14: Replacement Parts.........................................31
14.1 Gas Valve .................................................................31
14.2 Burner Compartment ...............................................32
14.3 Ignition Electrode and Flame Probe .........................33
14.4 Heat Exchanger .......................................................34
14.5 Louvers and Louver Spring ......................................34
14.6 Flue Blower .............................................................35
14.7 Pressure Switch........................................................36
14.8 Ignition Control .........................................................36
14.9 Axial Fan/Guard/Motor Assembly.............................36
14.10 Limit Switches ........................................................37
SECTION 15: Specifications.................................................38
15.1 Standard (Models 150 - 400) UHA[S] Series
Dimension Data .......................................................38
15.2 General Technical Data Table (All Models) ..............39
15.3 Technical Data Table (All Models) ............................39
SECTION 16: The ROBERTS GORDON ® COMBAT ®
UHA-Series Warranty .....................................41