Service manual

TABLE OF FIGURES
Figure 1: UHD[X][S] 75 Label Placement..................................2
Figure 2: UHD[X][S] 100-125 Label Placement.........................3
Figure 3: Clearances to Combustibles ......................................6
Figure 4: Air Flow Direction .......................................................8
Figure 5: Suspension Methods .................................................9
Figure 6: Shelf-Mounting Methods.......................................... 10
Figure 7: Wall Shelf Mounting and Suspension ...................... 10
Figure 8: Vent and Roof Detail ................................................13
Figure 9: Standard Vented Heater - Vertical and Horizontal
Vent Termination ...................................................... 14
Figure 10: Standard Vented Heater - Common Vertical Vent
Termination.............................................................15
Figure 11: Separated Combustion Heater - Vertical and
Horizontal Vent Termination.................................... 16
Figure 12: Concentric Vent Box............................................... 16
Figure 13: Concentric Vertical and Horizontal Vent
Termination - Separated Combustion Heater ......... 17
Figure 14: Gas Connection .....................................................20
Figure 15: Automatic Burner Control Sequence......................26
Figure 16: Gas Valve for Models UHD[X][S] 75 – 125 .............26
Figure 17: Manual Reset Limit Switch.....................................29
Figure 18: LED Diagnostic Codes...........................................29
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