UDBP Venting Requirements

ManualsBrandsReznor ManualsHeating SuppliesPower Vented Gas Fired Unit Heater - 105,000 BTU

Form I-UD&APD Series-V-PV (5-17), P/N 195675R20, Page 1

APPLIES TO:

Standard Power Vent, Fan Type Unit Heaters:

Model UDAP & Model APD

Standard Power Vent, Blower Type Unit Heaters:

Model UDBP

Form I-UD&APD Series-V-PV (05-17)

Obsoletes I-UD&APD Series-V-PV (03-17)

General

WARNING

Each heater requires its own individual vent pipe run and

vent cap. Manifolding of vent runs can cause recirculation

of combustion products into the building. Failure to comply

could result in severe personal injury or death and/or

property damage.

WARNING

Installation should be done by a qualied agency in

accordance with these instructions. The qualied service

agency installing this heater is responsible for the

installation.

This manual applies only to venting instructions and must be used with the installation

manual. Both manuals are shipped with the heater. If either manual is missing, contact

your distributor before beginning installation. The instructions in this manual apply to

Standard Power Vent fan type and Standard Power Vent blower type unit heaters.

Verify that the label near the vent outlet on the heater matches the label illustrated

below. (Label P/N is 201214; color is red.)

POWER

VENT

201214

Rear View of a Std Power Vent Fan Type Unit Heater

CAUTION: Standard Power Vent Fan & Blower type unit heaters

should not be used in an application where the heated space

temperature is below 50°F (10°C). Operating under low ambient

conditions may cause condensate to form in the heat exchanger.

Venting Requirements for Indoor, Power Vent

Summary of content (16 pages)

PAGE 1
Form I-UD&APD Series-V-PV (05-17) Obsoletes I-UD&APD Series-V-PV (03-17) Venting Requirements for Indoor, Power Vent APPLIES TO: Standard Power Vent, Fan Type Unit Heaters: Model UDAP & Model APD Standard Power Vent, Blower Type Unit Heaters: Model UDBP General This manual applies only to venting instructions and must be used with the installation manual. Both manuals are shipped with the heater. If either manual is missing, contact your distributor before beginning installation.
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Table of Contents General....................................................................1 1.0 Venting Requirements.....................................2 2.0 Venting Requirements and Instructions Residential Installation.....................................3 2.1 Type of Vent Pipe Required for Vent Run.....3 2.3 Venter (Flue) Outlet Diameter......................3 2.4 Vent System Sealing....................................3 2.2 Vent Pipe Diameter and Vent Length...........3 2.5 Vent System Support.......
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Residential Installation Std Power Vent fan type unit heater - Sizes 30, 45, 60, 75, 100, 125 2.0 Venting Requirements and Instructions - Residential Installation A Category III vent as defined by the National Fuel Gas Code Z223.1 or CAN/CSA B149.1 and B149.2 is required for a residential installation of a Std Power Vent fan type unit heater. Some venting requirements will vary, however, depending on whether the vent is horizontal or vertical.
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Residential Installation Std Power Vent fan type unit heater - Sizes 30, 45, 60, 75, 100, 125 2.0 Venting Requirements and Instructions - Residential Installation (cont’d) 2.5 Vent System Support 2.6 Condensation Support horizontal runs every six feet (1.8M). Support vertical runs of Category III vent pipe in accordance with the requirements of the pipe manufacturer. Do not rely on the heater for support of either horizontal or vertical pipes. Use noncombustible supports on vent pipe.
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Residential Installation Std Power Vent fan type unit heater - Sizes 30, 45, 60, 75, 100, 125 FIGURE 1 - Horizontal Vent Terminal - Residential Installation (NOTE: Read all measurements; drawing is not proportional.) Wall 3 ft (1M) minimum 6” (152mm) minimum 6 ft (1.8M) minimum Category III Vent Terminal Pipe Vent Pipe approved for a Category III heater Pitch flue pipe down toward outlet 1/4” per foot for condensate drainage (NOTE: Slope applies to entire horizontal vent run).
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Commercial / Industrial Installation Std Power Vent fan type or blower type unit heater - All Sizes 3.0 Venting Requirements and Instructions - Commercial/ Industrial Installation 3.1 Type of Vent Pipe Required for Vent Run A commercial/industrial installation may have either a horizontal or a vertical vent run using one of the types of vent pipe listed. Do not intermix different vent system parts from different manufacturers in the same venting system. Horizontal Vent Run Vertical Vent Run 3.
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Commercial / Industrial Installation Std Power Vent fan type or blower type unit heater - All Sizes 3.3 Venter (Flue) Outlet TABLE 5 Venter Outlet Size Venter Outlet Attachment Requirements: Depending on the size of vent pipe as determined in Paragraph 3.2, attach either the vent pipe directly to the collar or a taper-type connector. For Category III, attach a 4” appliance adapter from Category III pipe manufacturer directly to the collar, then use a reducer if using 3” pipe.
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Commercial / Industrial Installation Std Power Vent fan type or blower type unit heater - All Sizes 3.0 Venting Requirements and Instructions - Commercial/Industrial Installation (cont’d) 3.7 Vent Terminal (cont’d) TABLE 6 - Horizontal Vent Terminal Clearances Maintain a clearance of 6 to 12 inches (152-305mm) from the wall to the vent terminal cap for stability under wind conditions. Products of combustion can cause discoloration of some building finishes and deterioration of masonry materials.
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Commercial / Industrial Installation Std Power Vent fan type or blower type unit heater - All Sizes FIGURE 4 - Vertical Vent Terminal - Commercial/Industrial (NOTE: Read all measurements; drawing is not proportional.) Heaters w/Option CC1, CC21 or Novavent #2NVTB4 vent cap.
PAGE 10
Residential or Commercial / Industrial Installation Vertical Category I, Std Power Vent fan type unit heater Size 30, 45, 60 4.0 Venting Requirements & Instructions On vent systems where at least 75% of the equivalent length of the vent run is vertical and the vent terminates at least 5 feet above the vent outlet of the heater.
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4.6 Condensation On units with long vent runs (over 50% of maximum vent length allowed) or installed in low ambient conditions (below 50°F), it is recommended that vent pipes be fitted with a tee, a drip leg and a clean out cap to prevent any moisture in the vent pipe from entering the unit. The drip leg should be inspected and cleaned out periodically during the heating season.
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ADDENDUM Section A - Instructions for Attaching DoubleWall Vent Pipe (Type-B) FIGURE 5 - Attaching Double-Wall (Type B) Pipe to Single-Wall Pipe Figure 5 - STEP 1 Figure 5 - STEP 2 On the single-wall pipe, where Insert the single-wall pipe into illustrated, place a continual 1/4 the inner pipe of the doubleinch bead of silicone sealant wall pipe until the bead of around the circumference. Do sealant contacts the inner pipe STEP 2 immediately following creating a sealed joint. STEP 1.
PAGE 13
FIGURE 7 Attaching DoubleWall (Type-B) Vent Pipe to the Heater Figure 7 - STEP 1 Place a continual 1/4” bead of silicone sealant around the circumference of the venter outlet collar. Do STEP 2 immediately after STEP 1. Figure 7 - STEP 2 Slide the double-wall pipe over the collar so that the collar is inside the inner pipe. Push the doublewall pipe tight to the heater cabinet.
PAGE 14
ADDENDUM, Section B (cont’d) Instructions for Installing Flex-L brand Category III Vent Pipe (cont’d) b) Push the adapter pipe or reducer over the flue collar. c) On the top of the overlap, drill a 1/8” hole and insert a sheetmetal screw to secure the connection. 2. Run the Vent Pipe a) Refer to either the residential or commercial/industrial venting instructions in this manual for vent length requirements.
PAGE 15
NOTES: Form I-UD&APD Series-V-PV (5-17), P/N 195675R20, Page 15
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Specifications & illustrations subject to change without notice and without incurring obligations. ©Nortek Global HVAC, LLC 2017. All rights reserved. All marks are the property of their respective organizations. O’Fallon, MO I Printed in U.S.A.