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© 2008
Roberts-Gordon LLC
All rights reserved. No part of this work covered by the copyrights herein may be reproduced
or copied in any form or by any means - graphic, electronic, or mechanical, including
photocopying, recording, taping or information storage and retrieval systems - without the
written permission of Roberts-Gordon LLC.
Printed in U.S.A.
TABLE OF CONTENTS
SECTION 1: Heater Safety......................................................1
1.1 Manpower Requirements .............................................1
1.2 Safety Labels and Their Placement .............................1
SECTION 2: Installer Responsibility .....................................5
2.1 Wall Tag.......................................................................5
2.2 Corrosive Chemicals....................................................5
2.3 National Standards and Applicable Codes ..................5
SECTION 3: Critical Considerations .....................................6
3.1 Basic Information.........................................................6
3.2 Manufactured Units......................................................6
3.3 Location and Suspension ............................................6
3.4 Minimum Required Installation Clearances .................6
3.5 Clearances to Combustibles........................................6
3.6 Ventilation ....................................................................6
3.7 Gas Supply..................................................................7
3.8 Electrical Supply .........................................................7
3.9 Vent..............................................................................7
SECTION 4: National Standards and Applicable Codes .....8
4.1 Gas Codes...................................................................8
4.2 Aircraft Hangars ...........................................................8
4.3 Parking Structures and Repair Garages......................8
4.4 Electrical......................................................................8
4.5 Venting.........................................................................8
4.6 High Altitude ................................................................9
SECTION 5: Major Components.......................................... 10
5.1 General...................................................................... 10
5.2 Shelf Mounting and Suspension................................10
5.3 Wall Mounting............................................................10
SECTION 6: Venting..............................................................14
6.1 Changing Vent and Air Intake Orientation.................. 14
6.2 Venting.......................................................................14
6.3 Vent Installation ......................................................... 14
6.4 Unvented Operation...................................................15
6.5 Horizontal Venting......................................................15
6.6 Vertical Venting.......................................................... 16
6.7 Length Requirements ................................................16
6.8 Vent Material..............................................................16
6.9 Replacing an Existing Heater in a Venting System....16
SECTION 7: Air Supply.........................................................21
7.1 Separated Combustion Installation.............................21
7.2 Unvented Installation..................................................21
7.3 Building Ventilation.....................................................21
7.4 Outside Combustion Air Supply..................................21
SECTION 8: Gas Piping........................................................22
8.1 Connections...............................................................22
SECTION 9: Wiring................................................................23
9.1 Positioning Thermostats ............................................23
9.2 Low Voltage Thermostat with One Heater .................23
9.3 Low Voltage Thermostat with
Multiple Heaters 30 - 45.............................................24
9.4 Low Voltage Thermostat with
Multiple Heaters 60 - 125 ...........................................25
9.5 Internal Wiring Diagram .............................................26
9.6 Ladder Wiring Diagram..............................................27
9.7 Electrical Connection to the Heater............................28
SECTION 10: Operation and Maintenance ..........................29
10.1 Pre-Start-Up Checks ................................................29
10.2 Begin Start-Up .........................................................29
10.3 Complete Start-Up ...................................................32
SECTION 11: User Instructions............................................33
11.1 User Instructions.......................................................33
11.2 Heater Operation ......................................................33
11.3 Common User Controls.............................................33
11.4 Lighting Instructions..................................................33
11.5 Simple Troubleshooting.............................................34
SECTION 12: Servicing.........................................................35
12.1 Servicing Instructions...............................................35
12.2 Burner Maintenance.................................................35
12.3 Fan/Motor Assembly Maintenance...........................35
12.4 Heat Exchanger Maintenance..................................35
12.5 Gas Valve Maintenance ...........................................35
12.6 Flue Blower ..............................................................35
12.7 Venting and Air Intake Pipe......................................36
12.8 Maintenance Checklist.............................................36
SECTION 13: Troubleshooting.............................................38
13.1 General ....................................................................38
13.2 Troubleshooting For Automatic Ignition
Burner Systems .......................................................39
13.3 Troubleshooting for Flame Supervision System .......40
13.4 Troubleshooting for Gas Valves................................41
13.5 Troubleshooting for Flue Blower...............................41
SECTION 14: Replacement Parts.........................................42
14.1 Gas Valve.................................................................42
14.2 Burner Compartment ...............................................43
14.3 Ignition Electrode and Flame Probe .........................44
14.4 Heat Exchanger .......................................................45
14.5 Louver and Louver Springs......................................45
14.6 Flue Blower Vertical Installation ...............................46
14.7 Pressure Switch........................................................47
14.8 Ignition Control.........................................................47
14.9 Axial Fan/Guard/Motor Assembly.............................47
14.10 Limit Switches ........................................................48
SECTION 15: Specifications.................................................49
15.1 Dimension Data........................................................49
15.2 General Technical Data Table (All Models) ..............50
15.3 Technical Data Table (All Models) ............................50
SECTION 16: ROBERTS GORDON
®
BLACKHEAT
™
UHA-Series Warranty......................................51