Venting Guide

ManualsBrandsReznor ManualsUDAS Separated Combustion HeatersUDAS-200 Direct Vented Separated Combustion Gas Fired Unit Heater w/ Vertical Roof Vent Kit - 200,000 BTU

Form RZ-NA I-UD-V-SC, Mfg #195676 Rev 5, Page 1

APPLIES TO: Separated Combustion

Model UDAS and Model UDBS

Venting Instructions for

Separated Combustion Equipment

Vent Installation Form RZ-NA I-UD-V-SC (Version B)

Obsoletes Form RZ-NA I-V-SC (Version A)

Index (by page)

Hazards of Chlorine ....................2

Clearances

Vent Pipe ..................................5

Horizontal Vent Terminal.......10

Adjoining Buildings........11, 16

Combustion Air Collars

At the Heater ............................3

At the Adapter Box ..................6

Combustion Air Requirements ...1

Components

Horizontal Vent Kit (CC6) .......9

Vertical Vent Kit (CC2) ..........13

Concentric Adapter Box ......... 5-7

Pipe Diameter ............................. 3

General........................................1

Installation Instructions for

Horizontal Vent Kit (CC6) 9-12

Vertical Vent Kit (CC2) ... 13-16

Pipe Lengths ............................... 3

Sealing Pipe ................................5

Support ...................................... 4

Taper-type Connections

At the Adapter Box .............. 7-8

At the Heater ............................3

Type of Pipe

Residential Installation .......... 2

Commercial/Industrial .............2

Venter Outlet Size ...................... 3

Use this Venting Manual with the

Heater Installation Manual

Heater Installation Form

Model UDAS ........... RZ-NA I-UDA

Model UDBS............ RZ-NA I-UDB

Table of Contents

Page

General ......................................1

Separated Combustion ..............1

Venting Requirements ........... 2-8

Horizontal Vent (Option

CC6) Instructions ............. 9-12

Vertical Vent (Option

CC2) Instructions ........... 13-16

C E R T I F I E D

General

This manual applies only to venting and combustion air inlet instructions

and must be used with the installation manual that was shipped with the

heater. If either manual is missing, contact your distributor before begin-

ning installation.

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 as-

sembly required with this heater allows for both combustion air and exhaust

piping with only one horizontal or vertical penetration hole in the building.

WARNING: Installation should be done by a qualified agency in

accordance with these instructions. The qualified service agency

installing this separated-combustion system is responsible for the

installation.

The horizontal and vertical vent/combustion air systems illustrated in

this manual are the only venting/combustion air systems approved for

Model UDAS and Model UDBS separated-combustion unit heaters. Mod-

els UDAS 30, 45, 60, 75, 100 and 125 are certified for both residential and

commercial/industrial installations. Models UDAS 150, 175, 200, 225, 250,

300, 350, and 400 and Models UDBS 30, 45, 60, 75, 100, 125, 150, 175,

200, 225, 250, 300, 350, and 400 are certified only for commercial/industrial

installations.

WARNING: Do not use an existing venting system. This

heater requires installation of the combustion air/vent system

ordered with the unit, either Option CC6 for a horizontal

system or Option CC2 for a vertical system. Failure to

comply could result in severe personal injury or death and/

or property damage.

Verify that the label

near the vent outlet

on the heater

matches this label.

Apply green

separated

combustion label

P/N 201216 here.

Summary of content (16 pages)

PAGE 1
® Venting Instructions for Separated Combustion Equipment Vent Installation Form RZ-NA I-UD-V-SC (Version B) Obsoletes Form RZ-NA I-V-SC (Version A) CERTIFIED APPLIES TO: ® Separated Combustion Model UDAS and Model UDBS General Table of Contents Page General ...................................... 1 Separated Combustion .............. 1 Venting Requirements ........... 2-8 Horizontal Vent (Option CC6) Instructions ............. 9-12 Vertical Vent (Option CC2) Instructions ...........
PAGE 2
Hazards of Chlorine 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.
PAGE 3
Residential or Commercial/Industrial Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. 2. Venter Outlet and Combustion Air Inlet FIGURE 1 - Rear of Heater showing Location of Inlet and Outlet Connections Inlet Air Collar Venter Outlet Note: Small unit is illustrated. Larger units have slightly different orientation.
PAGE 4
Residential or Commercial/Industrial Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. Venting Requirements (cont’d) 3. Pipe Diameter and Length (cont’d) TABLE 3 - Diameters of Outdoor Concentric Pipes (Outlet Side of the Concentric Adapter Box to Terminals) Pipe diameters and maximum indoor vent lengths in TABLE 2 apply to both horizontal and vertical vent/combustion air systems. Add all straight sections and equivalent lengths for elbows.
PAGE 5
Residential or Commercial/Industrial Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. (NOTE: Pipes and vent caps may not look exactly as shown in the illustrations. Instructions apply to both horizontal and vertical vent kits.) Figure 2 - STEP 2 Insert the collar on the vent cap inside the inner wall of the double-wall pipe. Insert as far as possible. Add additional silicone sealant to fully close any gaps between the vent cap and the double wall pipe.
PAGE 6
Residential or Commercial/Industrial Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. Venting Requirements (cont’d) 7. Concentric Adapter Box (cont’d) FIGURE 4 - A Concentric Adapter Box is a Required Part of all Model UDAS and UDBS Installations A vent/combustion air kit which includes the concentric adapter box is ordered with the heater. A horizontal vent/ combustion air kit is Option CC6; a vertical vent/ combustion air kit is Option CC2.
PAGE 7
Residential or Commercial/Industrial Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. FIGURE 6 - Concentric Adapter Box Airflow End View showing Airflow Gray Arrows show Flow of Combustion Air Vent (exhaust gas) flows through field-supplied double-wall pipe that extends straight through the concentric adapter box.
PAGE 8
Residential or Commercial/Industrial Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. 4 (102mm) inside 6 (152mm) diameter double-wall diameter singlevent pipe wall inlet air pipe 4 (1 sing 02mm) attacle-wall indiameter hes t l o the et air pip e heat er This o porti vent ne piece on of the a to depipe. (Se nd mus vent pip t be e sho e ho t e r m Cate d r 4 (1 gory ine leng izontal oouble-w uld alwa (152 t singl 02mm) d h r I I .
PAGE 9
Residential or Commercial/Industrial Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. HORIZONTAL OR VERTICAL Is the Separated Combustion Vent/ Combustion Air System Horizontal or Vertical? HORIZONTAL VENT INSTRUCTIONS Horizontal, Option CC6, instructions begin below.
PAGE 10
Residential or Commercial/Industrial HORIZONTAL Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. HORIZONTAL VENT INSTRUCTIONS (cont’d) TABLE 5 - Clearances to Horizontal Vent Terminal WARNING: All vent terminals must be positioned or located away from fresh air intakes, doors and windows to preclude combustion products from entering occupied space. Failure to comply could result in severe personal injury or death and/or property damage.
PAGE 11
Residential or Commercial/Industrial HORIZONTAL Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. FIGURE 12 - Installation of a Typical SeparatedCombustion Unit with Horizontal Vent and Combustion Air Pipes (Option CC6) One piece of Double-Wall Vent Pipe 2 (51mm) 2 (51mm) if wall is combustible Attach box to wall with brackets.
PAGE 12
Residential or Commercial/Industrial HORIZONTAL Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. HORIZONTAL VENT INSTRUCTIONS (cont’d) b) Attach the outside portion of the combustion air pipe to the box. Determine the length by measuring the bracket length from box to wall, plus the wall thickness, plus 2" (51 mm). (The inlet air pipe should extend beyond the outside wall approximately 2" (51mm).
PAGE 13
Residential or Commercial/Industrial VERTICAL Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use.
PAGE 14
Residential or Commercial/Industrial VERTICAL Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. VERTICAL VENT INSTRUCTIONS (cont’d) FIGURE 13 - Brackets for Attaching the Concentric Adapter Box to the Roof 4. Prepare the Concentric Adapter Box a) Attach the brackets to the box. Follow the instructions in FIGURE 13. 2) Attach the Box to the Roof (Step 5) When the box is attached to the roof in Step 5, use the 2-1/2 (64mm) portion of the brackets.
PAGE 15
Residential or Commercial/Industrial VERTICAL Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. FIGURE 15 - Slide attached Combustion Air Pipe up through the Roof Snow Clearance 18 (457mm) minimum (NOTE: Maximum from concentric adapter box is 60 (1524mm) Outside view with concentric adapter box attached to underside of roof. Install field-supplied flashing at roof opening. 5. Attach the concentric adapter box to the roof.
PAGE 16
Residential or Commercial/Industrial VERTICAL Installation Note: Only UDAS 30, 45, 60, 75, 100, and 125 are certified for residential use. VERTICAL VENT INSTRUCTIONS (cont’d) 9. Attach the indoor combustion air pipe. Use sheetmetal screws to attach the single-wall combustion air pipe run to the collar on the concentric adapter box. Seal with tape or sealant. If using 3” vent pipe on Sizes 30, 45, and 60, install a taper type reducer as illustrated in FIGURE 7A, page 7.