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Roberts Gorden
UHA[X][S] 30 Combustion Air Intake, Pipe, Heat Exchanger, See Page 22, Section
Models:
UHA[X][S] 75
UHA[X][S] 60
UHA[X][S] 100
UHA[X][S] 125
UHA[X][S] 30
UHA[X][S] 45
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Troubleshooting
Install
Internal Wiring Diagram
Flame Signal Axial Fan
Wiring
Warranty
Maintenance
Checklist
How to
Replacement Parts
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Page 44
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Contents
Models UHAXS 30, 45, 60, 75, 100,
Installation, Operation & Service Manual
Combat
UHA-Series Tubular Unit Heaters Low Profile Range
Page
2008 Roberts-GordonLLC
TABLE OF CONTENTS
Printed in U.S.A
Page
TABLE OF FIGURES
Page
1.1 Manpower Requirements
SECTION 1: HEATER SAFETY
1.2 Safety Labels and Their Placement
For separated combustion units only
Figure 1: UHA 30 - 45 Label Placement
For separated combustion units only
Figure 2: UHA 60 - 75 Label Placement
For separated combustion units only
Figure 3: UHA 100 - 125 Label Placement
2.3 National Standards and Applicable Codes
SECTION 2: INSTALLER RESPONSIBILITY
2.1 Wall Tag
2.2 Corrosive Chemicals
3.6 Ventilation
3.4 Minimum Required Installation Clearances
3.2 Manufactured Units
3.5 Clearances to Combustibles
3.8 Electrical Supply
3.7 Gas Supply
3.9 Vent
4.4 Electrical
4.1 Gas Codes
4.2 Aircraft Hangars
4.3 Parking Structures and Repair Garages
4.6 High Altitude
Crush Hazard Use 3/8 threaded rod minimum
SECTION 5: MAJOR COMPONENTS 5.1 General
5.2 Shelf Mounting and Suspension
5.3 Wall Mounting
Figure 6: Shelf-MountingMethods
Figure 5: Suspension Methods
Existing cabinet screws must be re-used
Description
Description
Part Number
Wall Shelf Mounting Bracket Kit
spring to remove
Figure 8: Vertical Louvers Optional
Push in
louver and compress
6.2 Venting
6.3 Vent Installation
SECTION 6 VENTING
6.1 Changing Vent and Air Intake Orientation
6.4 Unvented Operation
6.3.1Standard Vented Heaters Models UHAX 30 -
6.5 Horizontal Venting
6.8 Vent Material
6.6 Vertical Venting
6.7 Length Requirements
6.7.1 Maximum Vent Lengths
Option
Figure 9: Vent and Roof Detail
Vertical
Horizontal
Page
Option
Figure 13: Concentric Vent Box
Vertical Option
Horizontal
Vent Terminal
7.3 Building Ventilation
7.1 Separated Combustion Installation
7.2 Unvented Installation
SECTION 7 AIR SUPPLY
8.1 Connections
SECTION 8: GAS PIPING
Figure 15: Gas Connection
9.2 Low Voltage Thermostat with One Heater
SECTION 9: WIRING
9.1 Positioning Thermostats
9.1.1 Fan Control
UHAXS 30 -
Model
Relay Type
Relay Part Number
Max. Number of Heaters
UHAXS 60 -
DPST
90436300
9.5 Internal Wiring Diagram
9.6 Ladder Wiring Diagram
9.7 Electrical Connection to the Heater
10.1.2 Electrical Checks
SECTION 10: OPERATION AND MAINTENANCE
10.1 Pre-Start-UpChecks
10.1.1 Louvers
Signals Output By Control
Figure 16: Automatic Burner Control Sequence
Figure 17: Gas Valve for Models UHAXS 30 -
Required Incoming Signals
10.2.4 Turning Off the Heater
10.2.3 Pressure Switch
Figure 18: Gas Valve for Models UHAXS 60 -
Check Gas Rate
10.3 Complete Start-Up
10.2.5 External Controls
10.3.1 Instruction to the User
11.1 User Instructions
Reset Limit Switch - See Page 33, Section
Figure 19: Manual Reset Limit Switch
SECTION 11: USER INSTRUCTIONS
11.4.2 To Turn the Heater Off
11.5 Simple Troubleshooting
11.5.1 Simple Troubleshooting Burner Faults
Figure 20: LED Diagnostic Codes
12.5 Gas Valve Maintenance
12.2 Burner Maintenance
12.3 Fan/Motor Assembly Maintenance
12.4 Heat Exchanger Maintenance
See Page 6, Section
12.8 Maintenance Checklist
12.7 Venting and Air Intake Pipe
The Vicinity of the Heater
Heat Exchanger
when installed
Combustion Air Intake
Pipe
START
SECTION 13: TROUBLESHOOTING 13.1 General
SECTION 13: TROUBLESHOOTING
13.3 Troubleshooting for Flame Supervision System
START
13.4Troubleshooting for Gas Valves
13.5Troubleshooting for Flue Blower
Correct power
Burner Components
SECTION 14 REPLACEMENT PARTS
14.1 Gas Valve
14.2.1 Burner Injectors
14.2 Burner Compartment
14.3 Ignition Electrode and Flame Probe
Horizontal
14.4 Heat Exchanger
14.5 Louver and Louver Springs
Install Vertical screws
14.6 Flue Blower Vertical Installation
14.9 Axial Fan/Guard/Motor Assembly
14.7 Pressure Switch
14.8 Ignition Control
14.10.1 Removal and Replacement
14.9.1 Fan Removal and Replacement
14.9.2 To Replace the Fan Assembly
14.10 Limit Switches
REAR VIEW
SECTION 15: SPECIFICATIONS 15.1 Dimension Data
TOP VIEW
SIDE VIEW
15.3 Technical Data Table All Models
15.2 General Technical Data Table All Models
Roberts-Gordon
WARRANTY IS VOID IF
ROBERTS GORDON WILL PAY FOR
ROBERTS GORDON WILL NOT PAY FOR
Page
Type of Installation check one
OWNER WARRANTY REGISTRATION CARD
About the Installer
Purchased From if different than installer
Page
Page
injury or property damage
Installation Clearances
Fire Hazard
close to heater
Top
Page
Image
Contents
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