Reznor APD User Manual

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UEZ-IOM (07-23) 1034347-I
Figure 16. Combustion Air Pipe Installation
6. Install terminal-end vent pipe:
NOTE: The length of the terminal-end vent pipe is determined by the installation within maximum
and minimum requirements. The vent pipe extending through the box, through the combustion air
inlet pipe, and above the combustion air inlet air pipe must be one piece without joints.
a. Refer to Figure 16 to determine required length of continuous section of vent pipe. Determine length as follows:
1) start with at least 6 inches (152 mm) below concentric adapter box for connecting to coupler, 2) plus 6
inches (152 mm) through box, 3) plus length of combustion air pipe, 4) plus minimum of 23 inches (584 mm)
beyond top of combustion air pipe—total is minimum length of vent pipe section.
NOTE: A longer vent pipe may be required.
b. Ensure that vent pipe is in proper flow direction and slide end of pipe into box and out through combustion air
pipe. Position vent pipe to lengths determined above.
c. Ensure that silicone ring is seated properly and connect terminal vent pipe to vent pipe run.
d. Recheck silicone ring to ensure that it is still properly seated.
7. 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.
DETAIL A

Reznor APD Specifications

General

Brand	Reznor
Model	APD
Category	Gas Heater
Language	English