Service manual

© 2013
Addison
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written permission of Addison.
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
1.3 California Proposition 65 ..............................................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 Ventilation ....................................................................6
3.6 Gas Supply ..................................................................6
3.7 Electrical Supply ..........................................................6
3.8 Vent..............................................................................6
SECTION 4: Clearances to Combustibles.............................7
4.1 Required Clearances to Combustibles.........................7
4.2 Clearances to Combustibles ........................................7
SECTION 5: National Standards and Applicable Codes......9
5.1 Gas Codes...................................................................9
5.2 Aircraft Hangars ...........................................................9
5.3 Parking Structures and Repair Garages ......................9
5.4 Electrical ......................................................................9
5.5 Venting .........................................................................9
5.6 High Altitude............................................................... 10
SECTION 6: Heater installation............................................ 11
6.1 General ...................................................................... 11
6.2 Shelf Mounting and Suspension ................................ 11
6.3 Wall Mounting ............................................................ 11
SECTION 7: Venting .............................................................. 15
7.1 Changing Vent and Air Intake Orientation...................15
7.2 Venting........................................................................ 15
7.3 Vent Installation .......................................................... 15
7.4 Unvented Operation....................................................16
7.5 Horizontal Venting....................................................... 16
7.6 Vertical Venting ...........................................................17
7.7 Length Requirements ................................................. 17
7.8 Vent Material...............................................................17
7.9 Replacing an Existing Heater in a Venting System ..... 17
SECTION 8: Air Supply .........................................................22
8.1 Separated Combustion Installation ............................22
8.2 Unvented Installation .................................................22
8.3 Building Ventilation.....................................................22
8.4 Outside Combustion Air Supply .................................22
SECTION 9: Gas Piping ........................................................23
9.1 Connections...............................................................23
SECTION 10: Wiring ..............................................................25
10.1 Positioning Thermostats...........................................25
10.2 Low Voltage Thermostat with One Heater................25
10.3 Low Voltage Thermostat with Multiple Heaters
Models UHA[X][S] 30 - 45........................................26
10.4 Low Voltage Thermostat with Multiple Heaters
Models UHA[X][S] 60 - 125 .................................... 27
10.5 UHA[X][S] Internal Wiring Diagram ......................... 28
10.6 UHA[X][S] Ladder Wiring Diagram .......................... 29
10.7 Electrical Connection to the Heater ......................... 30
SECTION 11: Operation and Maintenance ......................... 31
11.1 Pre-Start-Up Checks ................................................ 31
11.2 Begin Start-Up ......................................................... 31
11.3 Pressure Switch........................................................ 33
11.4 Turning Off the Heater .............................................. 33
11.5 External Controls...................................................... 34
11.6 Complete Start-Up ................................................... 34
11.7 Instruction to the User .............................................. 34
SECTION 12: User Instructions........................................... 35
12.1 Heater Operation..................................................... 35
12.2 Common User Controls ........................................... 35
12.3 Lighting Instructions ................................................ 36
12.4 Simple Troubleshooting ........................................... 36
SECTION 13: Servicing ........................................................ 37
13.1 Servicing Instructions .............................................. 37
13.2 Burner Maintenance ................................................ 37
13.3 Fan/Motor Assembly Maintenance .......................... 37
13.4 Heat Exchanger Maintenance ................................. 37
13.5 Gas Valve Maintenance........................................... 38
13.6 Flue Blower ............................................................. 38
13.7 Venting and Air Intake Pipe ..................................... 38
13.8 Maintenance Checklist ............................................ 38
SECTION 14: Troubleshooting............................................. 40
14.1 General.................................................................... 41
14.2 Troubleshooting For Automatic Ignition Burner
Systems................................................................... 42
14.3 Troubleshooting for Flame Supervision System....... 43
14.4 Troubleshooting for Gas Valves ............................... 44
14.5 Troubleshooting for Flue Blower .............................. 44
SECTION 15: Replacement Parts ........................................ 45
15.1 Gas Valve ................................................................ 45
15.2 Burner Injectors ....................................................... 46
15.3 Ignition Electrode and Flame Probe ........................ 47
15.4 Heat Exchanger....................................................... 48
15.5 Louver and Louver Springs ..................................... 48
15.6 Flue Blower Vertical Installation............................... 49
15.7 Pressure Switch....................................................... 50
15.8 Ignition Control ........................................................ 50
15.9 Axial Fan/Guard/Motor Assembly ............................ 50
15.10 Limit Switches........................................................ 51
SECTION 16: Specifications ................................................ 52
16.1 Dimension Data....................................................... 52
16.2 General Technical Data Table .................................. 53
16.3 Technical Data Table................................................ 53
SECTION 17: ADDISON
®
UHA-Series Warranty.................. 55