Reznor UDBP Option - Installation - Power Venting User Manual
Page 2
Form I-UD-V-PV, Page 2
1.0 Venting
Requirements
Model UDAP and UDBP heaters are certified as Category III heaters.
Venting must be in accordance with local codes and the National Fuel Gas Code
Z223.1 or CAN/CSA B149.1 and B149.2, Installation Code for Gas Burning Appliances
and Equipment. Local requirements supersede national requirements.
These power-vented unit heaters are designed to operate safely and efficiently with
either a horizontal or vertical vent. Comply with the specific requirements and instruc-
tions.
When an existing appliance is removed or replaced in a venting system, verify that the
venting system is properly sized to vent the new appliance. An improperly sized vent-
ing system may result in the formation of condensate, leakage, and/or spillage.
Do not vent into an existing gravity vent or chimney.
Installation should be done by a qualified agency in accordance with these instructions.
The qualified service agency installing this system is responsible for the installation.
Requirements and instructions vary depending on whether the installation is
residential or commercial/industrial. Select and follow the venting instructions
that apply to the installation only. All sizes of Model UDAP and Model UDBP unit
heaters are certified for commercial/industrial installation. Model UDAP Sizes
30, 45, 60, 75, 100, and 125 are also certified for residential installation. Utility
heaters certified for “residential use” are intended for heating of non-living spaces that
are attached to, or part of, a structure that contains space for family living quarters.
They are not intended to be the primary source of heat in residential applications or to
be used in sleeping quarters.
Is the Installation Residential or Commercial/Industrial?
Select and follow the venting instructions that apply.
Do not mix any instructions or
requirements.
• Paragraph 2.0, Residential Installation Venting Requirements and
Instructions (begins on page 3)
• Paragraph 3.0, Commercial/Industrial Installation Venting Requirements and
Instructions (begins on page 6)
General ..................................................................................................................1
1.0 Venting Requirements ....................................................................................2
2.0 Venting Requirements and Instructions - Residential Installation ........ 3-5
2.3 Venter (Flue) Outlet Diameter ....................................................3
2.4 Vent System Sealing ..................................................................3
2.5 Vent System Support ..................................................................4
2.6 Condensation .............................................................................4
2.7 Vent Terminal (Type of Pipe and Vent Cap) ...............................4
3.0 Venting Requirements and Instructions - Commercial/Industrial ......... 6-9
3.1 Type of Vent Pipe Required for Vent Run ...................................6
3.2 Vent Pipe Diameter and Length ................................................6
3.3 Venter (Flue) Outlet ....................................................................7
3.4 Vent System Sealing ..................................................................7
3.5 Vent System Support ..................................................................7
3.6 Condensation ............................................................................7
3.7 Vent Terminal ..............................................................................7
Section A - Instructions for Attaching Double-Wall Vent Pipe
(Type-B) ...................................................................................10
Section B - Instructions for Installing Flex-L brand Category III
Model UDAP or UDBP Heater ...........11
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