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