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
8. Install combustion air inlet (see Figure 11):
a. Install additional section of vent pipe if needed on outside and make joint in accordance with pipe manufacturer’s
requirements.
b. When vent pipe is required height, slide combustion air inlet over vent pipe and fasten collar to combustion
air pipe using sheet metal screws.
c. Seal opening at top between vent pipe and combustion air inlet to prevent water leakage using silicone sealant.
Figure 11. Combustion Air Inlet and Vent Terminal
9. Install exhaust (vent) cap in accordance with APPENDIX.
10. Install indoor combustion air pipe:
a. Secure single-wall combustion air pipe run to collar on concentric adapter box using field-supplied sheet metal
screws.
b. Seal pipe joint using tape or sealant.
11. Verify compliance with Figure 7 and with all specifications listed in Venting and Combustion Air
Requirements section and subsections.
Horizontal Vent Terminal (Option CC6) Installation
• Field-supplied components required for installation of the horizontal vent kit are as follows:
• Vent and combustion air piping in accordance with Table 3
• Tapered vent pipe diameter reducers and/or increasers, as required
• Thimble (not required if wall is of non-combustible construction)
• Flashing
• Sheet metal screws, tape, and sealant, as required
• Factory-supplied components for installation of the horizontal vent kit are listed in Table 8 and shown in Figure 12.
THIRD Install exhaust (vent) terminal
SECOND Install combustion air inlet:
1) Slide combustion air inlet over vent pipe
2) Secure bottom of inlet to combustion air pipe
using sheet metal screws—be sure not to pene-
trate vent pipe
3) At top, completely seal space between vent pipe
and air inlet using silicone
Double-Wall Vent Pipe
12-inch (305 mm) minimum
Note: In geographic areas
where design ambient is
–10°F or lower, minimum
height is 24 inches (610 mm)
Single-wall combustion air pipe
FIRST If needed, add
section of double-wall
pipe to reach
minimum height
requirement
Seal completely
with silicone to
prevent water
leakage
Table 8. Horizontal Vent Terminal/Combustion Air Package (Option CC6) Components
Unit Size
Description Qty
030–125 150–400
PN
211762 211763 Kit package 1
211789 211790 Concentric adapter box (see Figure 2, Figure 3, and Figure 4) 1
211791 211792 Exhaust grill (see Figure 12) 1
151755 124940 Inlet guard (see Figure 12) 1
207232 Concentric adapter box bracket 2
37661 Screw, sheet metal, #10-16 × 1/2 8
53335 High-temperature silicone sealant, tube 1