Reznor UDBS Option - Installation - Separated Combustion Venting - Manual (Page 2)

Form I-UD-V-SC, PN195676R17, Page 2
Is the Installation
Residential or
Commercial/
Industrial?
Hazards of Chlorine
1.0 Venting and
Combustion
Air
Requirements
for Separated
Combustion
Models UDAS
and UDBS
All separated combustion units MUST BE equipped with both combustion air and
exhaust piping to the outdoors. The unique concentric adapter assembly required with
this heater allows for both combustion air and exhaust piping with only one horizontal
or vertical penetration hole in the building.
When an existing appliance is removed or replaced in a venting system, the venting
system may not be properly sized to vent the attached appliances. An improperly sized
venting system may result in the formation of condensate, leakage, and/or spillage.
Concentric horizontal and vertical vent/combustion air systems are the only
venting/combustion air systems approved for Model UDAS and Model UDBS
separated-combustion unit heaters.
Model UDAS 30, 45, 60, 75, 100, and 125 are certified for both residential and com-
mercial/industrial installations. 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.
Model UDAS 150, 175, 200, 225, 250, 300, 350, and 400 and Model UDBS 30, 45, 60,
75, 100, 125, 150, 175, 200, 225, 250, 300, 350, and 400 are certified only for com-
mercial/industrial installations.
The presence of chlorine vapors in the combustion air of gas-fired heating equipment
presents a potential corrosion hazard. Chlorine found usually in the form of freon or
degreaser vapors, when exposed to flame will precipitate from the compound, and go
into solution with any condensation that is present in the heat exchanger or associated
parts. The result is hydrochloric acid which readily attacks all metals including 300
grade stainless steel. Care should be taken to separate these vapors from the com-
bustion process. This may be done by wise location of the combustion air terminal with
regard to exhausters or prevailing wind directions. Chlorine is heavier than air. Keep
these facts in mind when determining installation location of the heater in relation to
building exhaust systems.
General ............................................................ 1
1.0 Venting and Combustion Air
Requirements for Separated
Combustion Models UDAS & UDBS .... 2-8
1.1 Type of Pipe ................................................ 3
1.2 Venter Outlet and Combustion Air Inlet ....... 3
1.3 Pipe Diameter and Length ........................... 4
1.4 Joints and Sealing ...................................... 4
1.5 Support ........................................................ 5
1.6 Clearance .................................................... 5
1.7 Condensation .............................................. 6
1.8 Concentric Adapter Box ............................... 6
2.0 HORIZONTAL VENT INSTRUCTIONS -
Option CC6 ........................................... 9-12
2.1 Components Required - Factory & Field ..... 9
2.2 Installation Instructions for Horizontal
Vent/Combustion Air Kit Option CC6 ........10
3.0 VERTICAL VENT INSTRUCTIONS -
Option CC2 ........................................ 12-15
3.1 Components Required - Factory & Field ... 12
3.2 Installation Instructions for Vertical
Vent/Combustion Air Kit Option CC2 ..... 13
INDEX............................................................. 16
Table of Contents
The requirements in Venting Requirement 1.1, Type of Vent Pipe, are not the same for
Residential and Commercial/Industrial installations. Other venting requirements (1.2
through 1.8) are the same for both.
The installation instructions in Paragraphs 2 and 3 apply to both residential and com-
mercial/industrial installations.
The testing requirement in Paragraph 4 applies to a residential installation.
Read the headings and comply with the requirements that apply to the type of instal-
lation.