4 Inch Concentric Termination Installation
INTAKE AIR CONNECTION | INTAKE AIR PIPE | ||
3 INCH PVC |
| VENT PIPE | |
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3” x 3” x 4” |
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Y FITTING |
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8.Connect the intake air and vent piping from the water heater to the 4 inch concentric termination using field supplied 4” x 3” reducer couplings as needed.
9.Return to Direct Vent Installation on page 23 to complete the installation of the intake air and vent piping between the concentric termination and the water heater.
VENT CONNECTION - 3 INCH PVC | VENT CAP |
VENT PIPE IS 2 1/2 INCH
MAXIMUM ALLOWABLE LENGTH 73 INCHES (185 cm) MINIMUM ALLOWABLE LENGTH 25 INCHES (64 cm)
INTAKE AIR PIPE IS 4 INCH
MAXIMUM ALLOWABLE LENGTH 60 INCHES (152 cm) MINIMUM ALLOWABLE LENGTH 12 INCHES (30 cm)
INTAKE AIR PIPE
Y FITTING ASSEMBLY
VENT CAP
VENT PIPE ASSEMBLY
COMBUSTION
AIR
ROOF FLASHING (field supplied)
VENT
MAINTAIN 12” (30 cm) 18” (45 cm) FOR CANADA MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL. MAXIMUM OF 24” (60 cm) ABOVE ROOF.
STRAP (field supplied)
NOTE: SECURING STRAP MUST BE FIELD INSTALLED TO PREVENT MOVEMENT OF TERMINATION KIT
4 INCH CONCENTRIC TERMINATION KIT
FOUR PIECE KIT - FIELD ASSEMBLY REQUIRED
Figure 26
Assemble and install the 4 inch concentric termination. Refer to Figure 26, Figure 27 and Figure 28 for these instructions:
VENT | INTAKE |
PIPE | AIR PIPE |
4 INCH CONCENTRIC TERMINATION
VERTICAL INSTALLATION
Figure 27
1. | Cement the Y fitting to the larger diameter intake air pipe. |
2. | Slide the intake air pipe and Y fitting assembly from inside the |
| building through the hole cut for the termination in the roof |
| or sidewall. Ensure no foreign materials such as insulation |
| accumulate inside the assembly. |
3. | Secure the intake air Y fitting assembly using field supplied |
| metal strapping or equivalent support materials. |
4. | On installations installed through the roof slide a field |
| supplied plumbing boot or roof flashing over the intake air Y |
| fitting assembly and secure it to the roof. |
5. | Seal around the plumbing boot or roof flashing. |
6. | Cement the vent cap onto the vent pipe. Alternately a field- |
| supplied stainless steel screw may be used to secure the 2 |
NOTE: SECURING STRAP MUST BE FIELD INSTALLED TO PREVENT MOVEMENT OF TERMINATION KIT IN SIDEWALL.
VENT | STRAP | |||||||
PIPE | (field supplied) | |||||||
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COMBUSTION |
AIR |
VENT |
1 INCH |
MAXIMUM |
components together when field disassembly is desired for |
cleaning. A pilot hole must be drilled for the screw to prevent |
damage/cracking of the vent cap and/or vent pipe. |
7. Install the vent cap/vent pipe assembly into the intake air Y |
fitting assembly, Ensure small diameter vent pipe is cemented |
and bottomed in the Y fitting. |
INTAKE
AIR PIPE
4 INCH CONCENTRIC TERMINATION
SIDEWALL INSTALLATION
Figure 28
28