UDZ Venting Instructions
Table Of Contents
- VENTING INSTRUCTIONS FOR UNIT HEATERS (MODEL UBZ: SEPARATED-COMBUSTION BLOWER TYPE AND MODEL UDZ: SEPARATED-COMBUSTION FAN TYPE)
- GENERAL INFORMATION
- INSTALLATION
- APPENDIX: INSTRUCTIONS FOR ATTACHING DOUBLE-WALL TYPE B VENT PIPE TO SINGLE-WALL PIPE
- FIGURES
- Figure 1. Typical Combustion Air Inlet and Venter Outlet Connections
- Figure 2. Concentric Adapter Box
- Figure 3. Concentric Adapter Box Dimensions (Refer to Table 4)
- Figure 4. Concentric Adapter Box Connections (Refer to Table 4)
- Figure 5. Vent Terminal Options
- Figure 6. Option CC2 Components
- Figure 7. Option CC2 Installation
- Figure 8. Concentric Adapter Box Brackets
- Figure 9. Combustion Air Pipe Installation
- Figure 10. Combustion Air Pipe Through Roof
- Figure 11. Combustion Air Inlet and Vent Terminal
- Figure 12. Option CC6 Components
- Figure 13. Option CC6 Installation
- TABLES
- Table 1. Combustion Air Inlet and Venter Outlet Connection Sizes
- Table 2. Concentric (Outdoor) Pipe Sizes
- Table 3. Diameter and Length of Pipe from Heater to Concentric Adapter Box
- Table 4. Vent Pipe Opening Diameter
- Table 5. Concentric Adapter Box Vent Pipe Sizes
- Table 6. Vertical Vent Terminal/Combustion Air Package (Option CC2) Components
- Table 7. Minimum Spacing Between Center Lines of Vertical Vent Pipes
- Table 8. Horizontal Vent Terminal/Combustion Air Package (Option CC6) Components
- Table 9. Minimum Clearance Requirements for Horizontal Vent Termination Location
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CP-UBZ-UDZ-VENT (02-21) 1034632-0
4. Secure longer angles on concentric adapter box brackets (see Figure 8) to concentric adapter box.
NOTE: The longer angle of the concentric adapter box bracket has five 7/32-inch holes that allow
the position of the bracket on the box to be adjusted.
Figure 8. Concentric Adapter Box Brackets
5. Connect outside section of combustion air pipe to concentric adapter box (see Figure 9):
a. Determine length of combustion air pipe so that dimension X in Figure 9 is equal to bracket length, plus roof
thickness, plus anticipated snow depth. Ensure that length of combustion air pipe does not exceed 48 inches
(1,219 mm) or does not extend less than 18 inches (457 mm) above roof.
b. Secure inlet air pipe to collar of concentric adapter box using sheet metal screws. Seal joint and seam using
tape or sealant.
Figure 9. Combustion Air Pipe Installation
For Commercial/Industrial
installations, a