UHA-Series Tubular Unit Heaters Standard Range
Installation, Operation & Service Manual
Combat
Models UHAXS 150, 175, 200, 225 250, 300
Page
Manuel d’installation, d’operation, et de service
Gamme standard
Modèles UHAXS 150, 175, 200, 225 250, 300, 350,
Combat
Page
2012 Roberts-GordonLLC
Printed in U.S.A
Page
TABLE OF FIGURES
Page
1.2 Safety Labels and Their Placement
SECTION 1: HEATER SAFETY
1.1 Manpower Requirements
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
2.2 Corrosive Chemicals
SECTION 2: INSTALLER RESPONSIBILITY
2.1 Wall Tag
Product Damage Hazard
3.5 Ventilation
3.4 Minimum Required Installation Clearances
3.2 Manufactured Units
3.6 Gas Supply
Fire Hazard
4.2 Clearances To Combustibles
5.3 Parking Structures and Repair Garages
5.1 Gas Codes
5.2 Aircraft Hangars
5.4 Electrical
5.6 High Altitude
Crush Hazard Use 3/8 threaded rod minimum
SECTION 6: HEATER INSTALLATION 6.1 General
6.2 Suspension
Figure 5 Suspension Methods
SECTION 7: VENTING
Heaters may be installed vented or unvented
7.2 Vent Installation
Carbon Monoxide Hazard
7.4 Horizontal Venting
7.2.1Standard Vented Heaters Models UHAX 150 -
7.3 Unvented Operation
7.5 Vertical Venting
7.7 Vent Material
Maximum Vent Lengths Table
Figure 6: Vent and Roof Detail
Model
14 of
Vertical Option Bend Horizontal Option
Part Number
Heaters must be of the same BTU output
Requirements
15 of
Figure 10: Concentric Vent Box
16 of
Option
17 of
Vertical
Horizontal
SECTION 8: AIR SUPPLY
8.1 Separated Combustion Installation
8.2 Unvented Installation
Explosion Hazard
9.1 Connections
Gas can leak if piping is not installed properly
SECTION 9: GAS PIPING
Explosion Hazard
Figure 12 Gas Connection
Do not bend flexible gas connector
Product Damage Hazard
DANGER
SECTION 10: WIRING
Disconnect electric before service
Electrical Shock Hazard
Relay Type
22 of
Model
Relay Part Number
Relay Type
23 of
Model
Relay Part Number
10.5 UHAXS Series Internal Wiring Diagram
10.6 UHAXS Series Ladder Wiring Diagram
Note: Junction box is not provided with heater
10.7 Electrical Connection to the Heater
26 of
before service
SECTION 11: OPERATION AND MAINTENANCE
heater before service
during installation
on Page 28, Figure
11.2 Begin Start-Up
11.2.1 Before Operating the Heater
Figure 13: Automatic Burner Control Sequence
Check Gas Rate
11.2.3 Pressure Switch
Figure 14: Gas Valve for Models UHAXS 150 -
11.2.4 Turning Off the Heater
11.3 Complete the Start-Up
11.2.5 External Controls
11.3.1 Instruction to the User
Figure 15: LED Diagnostic Codes
12.3 Simple Troubleshooting
12.3.1 Simple Troubleshooting Burner Fault
SECTION 12: USER INSTRUCTIONS
13.4 Heat Exchanger Maintenance
13.2 Burner Maintenance
13.3 Fan/Motor Assembly Maintenance
13.5 Gas Valve Maintenance
Annual Fall Start-Up
13.8 Maintenance Checklist
13.7 Venting and Air Intake Pipe
The Vicinity of the Heater
See Page 19, Section
when installed
Heat Exchanger
Gas Line and Shut-off
before service
SECTION 14: TROUBLESHOOTING
heater before service
during installation
14.1 General
36 of
37 of
14.3 Troubleshooting for Flame Supervision System
14.5 Troubleshooting for Flue Blower
14.4 Troubleshooting for Gas Valves
39 of
15.1 Gas Valve
SECTION 15: REPLACEMENT PARTS
Burner Components
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
15.9 Axial Fan/Guard/Motor Assembly
15.7 Pressure Switch
15.8 Ignition Control
15.10.1 Removal and Replacement
15.9.1Fan Removal and Replacement
15.10 Limit Switches
15.9.2 To Replace the Fan Assembly
SECTION 16: SPECIFICATIONS 16.1 Dimension Data
47 of
16.3 Technical Data Table
16.2 General Technical Data Table
48 of
ROBERTS-GORDONLLC WILL NOT PAY FOR
WARRANTY IS VOID IF
ROBERTS-GORDONLLC WILL PAY FOR
U.S.A
Page
About the Installer
Mail or Fax to
OWNER WARRANTY REGISTRATION CARD
Purchased From if different than installer
Page
![Figure 1: UHA[X][S]150 - 175 Label Placement](/images/new-backgrounds/34902/3490219x1.webp)
