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Gas Heater
Roberts Gorden
300, 200, 350, 150, 400, 175, 225 250 service manual
Models:
225 250
175
300
400
150
350
200
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Troubleshooting
Specs
Install
UHAS Series Internal Wiring Diagram
Replacement Parts
Warranty
Maintenance
Wiring
Axial Fan/Guard/Motor Assembly
Safety
Page 46
Image 46
COMBAT
®
UHA U
NIT
H
EATER
I
NSTALLATION
O
PERATION AND
S
ERVICE
M
ANUAL
40
Page 45
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Page 46
Image 46
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Contents
Models UHAS
Combat
UHA-Series Tubular Unit Heaters Standard Range
If you smell gas
Page
2008 Roberts-GordonLLC
Page
TABLE OF FIGURES
Page
SECTION 1 HEATER SAFETY
1.1 Manpower Requirements
2.2 Corrosive Chemicals
SECTION 2 INSTALLER RESPONSIBILITY
2.1 Wall Tag
2.3 National Standards and Applicable Codes
3.4 Clearances to Combustibles
3.3 Minimum Required Installation Clearances
3.9 Separated Combustion Installation
3.5 Ventilation
Clearance to Vent 2 5 cm
4.3 Parking Structures and Repair Garages
4.1 Gas Codes
4.2 Aircraft Hangars
4.4 Electrical
5.2 Suspension
SECTION 5 MAJOR COMPONENTS 5.1 General
Figure 2 Suspension Methods
6.1.1 United States Requirements
6.2 Vent Installation
SECTION 6 VENTING 6.1 Venting
6.1.2 Canadian Requirements
6.5 Vertical Venting
6.3 Unvented Operation
6.4 Horizontal Venting
6.6 Length Requirements
6.7 Vent Material
Figure 3 Vent and Roof Detail
SIDE VIEW
TOP VIEW
Figure 7 Concentric Vent Box
Horizontal
Vertical Option 10 3 m Maximum
Option
SECTION 7: AIR SUPPLY
7.1 Separated Combustion Installation
7.2 Unvented Installation
7.3 Building Ventilation
8.1 Connections
SECTION 8 GAS PIPING
Figure 9 Gas Connection
9.1 Positioning Thermostats
SECTION 9 WIRING
9.2 Low Voltage Thermostat with One Heater
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
10.1.1 Louvers
SECTION 10 OPERATION AND MAINTENANCE
10.1 Pre-Start-UpChecks
10.1.2 Electrical Checks
Regulator
Figure 10 Automatic Burner Control Sequence
Figure 11 Gas Valve for Models UHAS
Gas Inlet
10.2.4 Turning Off the Heater
10.2.3 Pressure Switch
Check Gas Rate
10.2.5 External Controls
Figure 12 LED Diagnostic Codes
11.4 Simple Troubleshooting
11.4.1 Simple Troubleshooting Burner Fault
11.2 Heater Operation
FOR YOUR SAFETY
If you smell gas
12.4 Heat Exchanger Maintenance
12.2 Burner Maintenance
12.3 Fan/Motor Assembly Maintenance
12.5 Gas Valve Maintenance
See Page 3, Section
12.8 Maintenance Checklist
The Vicinity of the Heater
Vehicles and Other
Window
when installed
Burner Observation
Flue Blower Scroll, Wheel
Explosion Hazard
SECTION 13 TROUBLESHOOTING 13.1 General
START
Do not touch ignition components
START
Electrical Shock Hazard
Voltage from ignition components is high
13.3 Troubleshooting for Flame Supervision System
13.5 Troubleshooting for Flue Blower
13.4 Troubleshooting for Gas Valves
For your safety and optimum heater performance
Burner Components
SECTION 14 REPLACEMENT PARTS
GAS VALVE IS USED WHEN REPLACING THESE CONTROLS
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
14.9 Axial Fan/Guard/Motor Assembly
14.7 Pressure Switch
14.8 Ignition Control
See Page 16, Section 9.3 wiring diagram
14.9.1 Fan Removal and Replacement
14.9.2 To Replace the Fan Assembly
14.10 Limit Switches
SECTION 15 SPECIFICATIONS
15.2 General Technical Data Table All Models
15.3 Technical Data Table All Models
Page
ROBERTS-GORDONWILL NOT PAY FOR
WARRANTY IS VOID IF
ROBERTS-GORDONWILL PAY FOR
U.S.A
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Fire Hazard
