Installation, Operation & Service Manual
Combat
UHA-Series Tubular Unit Heaters Standard Range
Models UHAXS 150, 175, 200, 225 250, 300
Page
Gamme standard
Modèles UHAXS 150, 175, 200, 225 250, 300, 350,
Manuel d’installation, d’operation, et de service
Combat
Page
2012 Roberts-GordonLLC
Printed in U.S.A
Page
TABLE OF FIGURES
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SECTION 1: HEATER SAFETY
1.1 Manpower Requirements
1.2 Safety Labels and Their Placement
1.3 California Proposition
Figure 1: UHAXS150 - 175 Label Placement
For separated combustion units only 2 of
Figure 2: UHAXS200 - 250 Label Placement
For separated combustion units only 3 of
Figure 3: UHAXS300 - 400 Label Placement
For separated combustion units only 4 of
SECTION 2: INSTALLER RESPONSIBILITY
2.1 Wall Tag
2.2 Corrosive Chemicals
Product Damage Hazard
3.4 Minimum Required Installation Clearances
3.2 Manufactured Units
3.5 Ventilation
3.6 Gas Supply
Fire Hazard
4.2 Clearances To Combustibles
5.1 Gas Codes
5.2 Aircraft Hangars
5.3 Parking Structures and Repair Garages
5.4 Electrical
5.6 High Altitude
SECTION 6: HEATER INSTALLATION 6.1 General
6.2 Suspension
Crush Hazard Use 3/8 threaded rod minimum
Figure 5 Suspension Methods
Heaters may be installed vented or unvented
7.2 Vent Installation
SECTION 7: VENTING
Carbon Monoxide Hazard
7.2.1Standard Vented Heaters Models UHAX 150 -
7.3 Unvented Operation
7.4 Horizontal Venting
7.5 Vertical Venting
Figure 6: Vent and Roof Detail
Maximum Vent Lengths Table
7.7 Vent Material
14 of
Vertical Option Bend Horizontal Option
Model
Part Number
15 of
Requirements
Heaters must be of the same BTU output
Figure 10: Concentric Vent Box
16 of
17 of
Vertical
Option
Horizontal
8.1 Separated Combustion Installation
8.2 Unvented Installation
SECTION 8: AIR SUPPLY
Explosion Hazard
Gas can leak if piping is not installed properly
SECTION 9: GAS PIPING
9.1 Connections
Explosion Hazard
Product Damage Hazard
Do not bend flexible gas connector
Figure 12 Gas Connection
SECTION 10: WIRING
Disconnect electric before service
DANGER
Electrical Shock Hazard
22 of
Model
Relay Type
Relay Part Number
23 of
Model
Relay Type
Relay Part Number
10.5 UHAXS Series Internal Wiring Diagram
10.6 UHAXS Series Ladder Wiring Diagram
26 of
10.7 Electrical Connection to the Heater
Note: Junction box is not provided with heater
SECTION 11: OPERATION AND MAINTENANCE
heater before service
before service
during installation
11.2 Begin Start-Up
11.2.1 Before Operating the Heater
on Page 28, Figure
Figure 13: Automatic Burner Control Sequence
11.2.3 Pressure Switch
Figure 14: Gas Valve for Models UHAXS 150 -
Check Gas Rate
11.2.4 Turning Off the Heater
11.3.1 Instruction to the User
11.2.5 External Controls
11.3 Complete the Start-Up
12.3 Simple Troubleshooting
12.3.1 Simple Troubleshooting Burner Fault
Figure 15: LED Diagnostic Codes
SECTION 12: USER INSTRUCTIONS
13.2 Burner Maintenance
13.3 Fan/Motor Assembly Maintenance
13.4 Heat Exchanger Maintenance
13.5 Gas Valve Maintenance
13.8 Maintenance Checklist
13.7 Venting and Air Intake Pipe
Annual Fall Start-Up
The Vicinity of the Heater
when installed
Heat Exchanger
See Page 19, Section
Gas Line and Shut-off
SECTION 14: TROUBLESHOOTING
heater before service
before service
during installation
14.1 General
36 of
37 of
14.3 Troubleshooting for Flame Supervision System
39 of
14.4 Troubleshooting for Gas Valves
14.5 Troubleshooting for Flue Blower
SECTION 15: REPLACEMENT PARTS
Burner Components
15.1 Gas Valve
DANGER
15.2 Burner Compartment
15.2.1 Burner Injectors
15.3 Ignition Electrode and Flame Probe
15.4 Heat Exchanger
15.5 Louvers and Louver Spring
15.6 Flue Blower
15.8 Ignition Control
15.7 Pressure Switch
15.9 Axial Fan/Guard/Motor Assembly
15.9.1Fan Removal and Replacement
15.10 Limit Switches
15.10.1 Removal and Replacement
15.9.2 To Replace the Fan Assembly
SECTION 16: SPECIFICATIONS 16.1 Dimension Data
47 of
48 of
16.2 General Technical Data Table
16.3 Technical Data Table
WARRANTY IS VOID IF
ROBERTS-GORDONLLC WILL PAY FOR
ROBERTS-GORDONLLC WILL NOT PAY FOR
U.S.A
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Mail or Fax to
OWNER WARRANTY REGISTRATION CARD
About the Installer
Purchased From if different than installer
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