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Roberts Gorden
75, 100, 125 service manual 46 of
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Troubleshooting
Specification
Install
UHDXS Series Internal Wiring Diagram
Safety Labels and Their Placement
Warranty
Maintenance
Wiring
Manual Reset Limit Switch
Temperature Rise and Pressure Drop Ranges
Page 54
Image 54
UHD L
OW
P
ROFILE
D
UCT
F
URNACE
I
NSTALLATION
O
PERATION AND
S
ERVICE
M
ANUAL
46 of 47
Page 53
Page 55
Page 54
Image 54
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Contents
Combat
UHD-Series Tubular Duct Furnace Low Profile Range
Models UHDXS
If you smell gas
Page
Combat
Modèles UHDXS
Manuel d’installation, d’operation, et de service
AVERTISSEMENT
Page
2012 Roberts-GordonLLC
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 UHDXS 75 Label Placement
For separated combustion units only
2 of
Figure 2 UHDXS 100-125Label Placement
Combat
Combatby
2.2 Corrosive Chemicals
SECTION 2 INSTALLER RESPONSIBILITY
2.1 Wall Tag
2.3 National Standards and Applicable Codes
3.1 Basic Information
3.4 Minimum Required Installation Clearances
SECTION 3 CRITICAL CONSIDERATIONS
6, Figure 3 for details
Fire Hazard
4.2 Clearances to Combustibles
Figure 3 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
6.1.3 Air Flow and Temperature Rise Ranges
SECTION 6 DUCT HEATER INSTALLATION 6.1 General
6.1.2 Temperature Rise and Pressure Drop Ranges
6.1.1 Minimum Inlet Duct Length
6.3 Wall Mounting
6.2 Shelf Mounting and Suspension
Crush Hazard Use 3/8 threaded rod minimum
Figure 5: Suspension Methods
Existing cabinet screws must be re-used
Figure 6 Shelf-MountingMethods
Figure 7 Wall Shelf Mounting and Suspension
11 of
SECTION 7 VENTING
Heaters may be installed vented or unvented
7.3 Vent Installation
Carbon Monoxide Hazard
7.5 Horizontal Venting
7.3.1Standard Vented Heaters Models UHDX
7.4 Unvented Operation
7.6 Vertical Venting
7.7.1 Maximum Vent Lengths
7.8 Vent Material
Figure 8 Vent and Roof Detail
UHDX
15 of
Model
90502102
Requirements
Figure 12 Concentric Vent Box
17 of
Part Number
18 of
Description
Concentric Vent Kit
SECTION 8 AIR SUPPLY
8.1 Separated Combustion Installation
8.2 Unvented Installation
Explosion Hazard
Connect gas supply according to Figure
Gas can leak if not installed properly
SECTION 9 GAS PIPING Fire Hazard
9.1 Connections
Product Damage Hazard
when attaching flexible gass connector
Figure 14 Gas Connection
Hold gas nipple securely with pip wrench
10.1 Positioning Thermostats
SECTION 10 WIRING
10.2 Low Voltage Thermostat with One Heater
DANGER
10.3 UHDXS Series Internal Wiring Diagram
10.4 UHDXS Series Ladder Wiring Diagram
10.5 Electrical Connection to the Heater
before service
SECTION 11 OPERATION AND MAINTENANCE
heater before service
during installation
END VIEW
Figure 15 Automatic Burner Control Sequence
Figure 16 Gas Valve for Models UHDXS
before a one hour lockout
11.2.4 Turning Off the Heater
11.2.3 Pressure Switch
Check Gas Rate
11.2.5 External Controls
SECTION 12 USER INSTRUCTIONS
12.2.1 Manual Reset Limit Switch
The fault must be traced and repaired
12.1 Heater Operation
12.4.1 Simple Troubleshooting Burner Faults
Figure 17 Manual Reset Limit Switch
12.4 Simple Troubleshooting
Figure 18 LED Diagnostic Codes
13.4 Gas Valve Maintenance
13.2 Burner Maintenance
13.3 Heat Exchanger Maintenance
SECTION 13 SERVICING
Annual Fall Start-up
13.7 Maintenance Checklist
Installation Code and Annual Inspections
The Vicinity of the Heater
Pipe
when installed
Combustion Air Intake
Heat Exchanger
before service
SECTION 14 TROUBLESHOOTING
heater before service
during installation
14.1General
35 of
36 of
TROUBLESHOOT ENDS. No
14.3 Troubleshooting for Flame Supervision System
14.4 Troubleshooting for Gas Valves
14.5 Troubleshooting for Flue Blower
38 of
15.1 Gas Valve
SECTION 15 REPLACEMENT PARTS
Burner Components
DANGER
Ensure gas tight fitting of injectors
15.2 Burner Compartment
15.2.1 Burner Injectors
Ensure correct alignment with burners
15.3 Ignition Electrode and Flame Probe
15.4 Heat Exchanger
15.5 Flue Blower Vertical Installation
15.8.1 Removal and Replacement
15.6 Pressure Switch
15.8 Limit Switches
15.7 Ignition Control
SECTION 16 SPECIFICATIONS 16.1 Dimension Data
44 of
16.2 General Technical Data Table
16.3 Technical Data Table
45 of
46 of
ROBERTS-GORDONLLC WILL NOT PAY FOR
WARRANTY IS VOID IF
ROBERTS-GORDONLLC WILL PAY FOR
Roberts-GordonLLC
Page
About the Installer
Mail or Fax to
OWNER WARRANTY REGISTRATION CARD
Purchased From if different than installer
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