Reznor APD User Manual

10
UEZ-IOM (07-23) 1034347-I
Vent/Combustion Air System Piping Requirements
⚠ DANGER ⚠
All separated-combustion units MUST BE equipped with both combustion air and exhaust piping
to the outdoors.
Vent/Combustion Air Piping Requirements (Unit Sizes 055–110)
NOTE: Unit sizes 055, 085, and 110 are recommended for use with UL-1738-compliant Category IV
venting systems in the US, and with any ULC-S636-listed Category IV venting system in Canada.
Venting may be terminated horizontally or vertically, provided that instructions for the selected
system are followed.
• Where permitted by local codes, PVC/CPVC pipes meeting ASTM D1785 and/or ASTM F441 designated Schedule
40 are permitted to be used.
• Refer to Table 8 for vent and combustion air piping size requirements.
• The venter outlet and combustion air inlet are located at the rear of the heater (see Figure 4).
VENTING AND COMBUSTION AIR REQUIREMENTS
NOTE: Refer to the Vent Connections section for details on vent system installation.
These units are certified as Category IV heaters. These heaters are very thermal efficient and will produce condensate
during operation. Refer to Table 7 for suggested Category IV venting system providers.
Table 7. Suggested Category IV Venting System Providers
IPEX USA LLC DuraVent Inc. Industrial Chimney Co.
Noritz America Corporation METAL-FAB Inc. Cleaver-Brooks Inc.
The Schebler Co. Tokyo Gas Renovation Co. Ltd. SFL Flue & Chimney
Cheminee Lining E Inc. Lifetime Chimney Supply LLC Industrial Combustion LLC
Selkirk Corporation Van-Packer Co. Inc. CaptiveAire Systems
Z-FLEX US Inc. Security Chimneys International Ltd.
ECCO Manufacturing Division of ECCO
Heating Products Ltd.
Rheem Sales Co. Inc. ENERVEX Inc. Sunair Products
Table 8. Vent/Combustion Air Piping Size Requirements (Unit Sizes 055–110)
Unit
Size
Vent Piping Combustion Air Piping
Diameter
(Inches (mm))
Maximum
Length
Equivalent Straight
Length for Elbows
Pipe
Section
Diameter
(Inches (mm))
Length
(Feet (Meters))
90-Degree
Elbow*
45-Degree
Elbow
Feet (Meters) Minimum Maximum
055, 085 2 (51) or 3 (76) 50 (15.2)
8 (2.4) 4 (1.2)
Heater to
concentric vent
2 (51) 3 ( 914) 50 ( 15.2)
110
2 (51) 25 (7.6) 2 (51) 3 ( 914) 25 (7.6)
3 (76) 50 ( 15.2) 3 (76) 3 ( 914) 50 ( 15.2)
*All 90-degree elbows in the vent system must be sweep type.

Reznor APD Specifications

General

Brand	Reznor
Model	APD
Category	Gas Heater
Language	English