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Roberts Gorden
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Gas Heater
Roberts Gorden
225 250, 200, 350, 150, 400, 300, 175 service manual
Models:
225 250
175
300
400
150
350
200
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Troubleshooting
Specification
Install
UHAS Series Internal Wiring Diagram
Replacement Parts
Warranty
Maintenance
Wiring
Axial Fan/Guard/Motor Assembly
Safety
Page 48
Image 48
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Page 49
Page 48
Image 48
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Contents
Combat
UHA-Series Tubular Unit Heaters Standard Range
Models UHAS
If you smell gas
Page
2008 Roberts-GordonLLC
Page
TABLE OF FIGURES
Page
SECTION 1 HEATER SAFETY
1.1 Manpower Requirements
SECTION 2 INSTALLER RESPONSIBILITY
2.1 Wall Tag
2.2 Corrosive Chemicals
2.3 National Standards and Applicable Codes
3.3 Minimum Required Installation Clearances
3.9 Separated Combustion Installation
3.4 Clearances to Combustibles
3.5 Ventilation
Clearance to Vent 2 5 cm
4.1 Gas Codes
4.2 Aircraft Hangars
4.3 Parking Structures and Repair Garages
4.4 Electrical
SECTION 5 MAJOR COMPONENTS 5.1 General
5.2 Suspension
Figure 2 Suspension Methods
6.2 Vent Installation
SECTION 6 VENTING 6.1 Venting
6.1.1 United States Requirements
6.1.2 Canadian Requirements
6.3 Unvented Operation
6.4 Horizontal Venting
6.5 Vertical Venting
6.6 Length Requirements
6.7 Vent Material
Figure 3 Vent and Roof Detail
SIDE VIEW
TOP VIEW
Figure 7 Concentric Vent Box
Vertical Option 10 3 m Maximum
Horizontal
Option
7.1 Separated Combustion Installation
7.2 Unvented Installation
SECTION 7: AIR SUPPLY
7.3 Building Ventilation
SECTION 8 GAS PIPING
8.1 Connections
Figure 9 Gas Connection
SECTION 9 WIRING
9.2 Low Voltage Thermostat with One Heater
9.1 Positioning Thermostats
9.1.1 Fan Control
9.3 UHAS Series Internal Wiring Diagram
9.4 UHAS Series Ladder Wiring Diagram
9.5 Electrical Connection to the Heater
Note Junction box is not provided with heater
SECTION 10 OPERATION AND MAINTENANCE
10.1 Pre-Start-UpChecks
10.1.1 Louvers
10.1.2 Electrical Checks
Figure 10 Automatic Burner Control Sequence
Figure 11 Gas Valve for Models UHAS
Regulator
Gas Inlet
10.2.3 Pressure Switch
Check Gas Rate
10.2.4 Turning Off the Heater
10.2.5 External Controls
11.4 Simple Troubleshooting
11.4.1 Simple Troubleshooting Burner Fault
Figure 12 LED Diagnostic Codes
11.2 Heater Operation
FOR YOUR SAFETY
If you smell gas
12.2 Burner Maintenance
12.3 Fan/Motor Assembly Maintenance
12.4 Heat Exchanger Maintenance
12.5 Gas Valve Maintenance
12.8 Maintenance Checklist
The Vicinity of the Heater
See Page 3, Section
Vehicles and Other
when installed
Burner Observation
Window
Flue Blower Scroll, Wheel
SECTION 13 TROUBLESHOOTING 13.1 General
Explosion Hazard
START
START
Electrical Shock Hazard
Do not touch ignition components
Voltage from ignition components is high
13.3 Troubleshooting for Flame Supervision System
13.4 Troubleshooting for Gas Valves
13.5 Troubleshooting for Flue Blower
For your safety and optimum heater performance
SECTION 14 REPLACEMENT PARTS
GAS VALVE IS USED WHEN REPLACING THESE CONTROLS
Burner Components
14.1 Gas Valve
14.2 Burner Compartment
14.2.1 Burner Injectors
14.3 Ignition Electrode and Flame Probe
14.4 Heat Exchanger
14.5 Louvers and Louver Spring
14.6 Flue Blower
14.7 Pressure Switch
14.9 Axial Fan/Guard/Motor Assembly
14.8 Ignition Control
14.9.1 Fan Removal and Replacement
14.9.2 To Replace the Fan Assembly
See Page 16, Section 9.3 wiring diagram
14.10 Limit Switches
SECTION 15 SPECIFICATIONS
15.2 General Technical Data Table All Models
15.3 Technical Data Table All Models
Page
WARRANTY IS VOID IF
ROBERTS-GORDONWILL PAY FOR
ROBERTS-GORDONWILL NOT PAY FOR
U.S.A
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Fire Hazard
