UDZ Venting Instructions

ManualsBrandsReznor ManualsHeatingUDZ Gas Fired Unit Heater, Separated Combustion, Low Static Axial Fan, NG, Aluminized Heat Exchanger, Vertical Roof Vent - 105,000 BTU

Table Of Contents

VENTING INSTRUCTIONS FOR UNIT HEATERS (MODEL UBZ: SEPARATED-COMBUSTION BLOWER TYPE AND MODEL UDZ: SEPARATED-COMBUSTION FAN TYPE)

Revision: CP-UBZ-UDZ-VENT (02-21) 1034632-0

VENTING INSTRUCTIONS FOR UNIT HEATERS

Supersedes: — (Original Version)

GENERAL INFORMATION

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.

Important Safety Information

Please read all information in this manual thoroughly and become familiar with the capabilities and use of your

appliance before attempting to operate or maintain this unit. Pay attention to all dangers, warnings, cautions, and

notes highlighted in this manual. Safety markings should not be ignored and are used frequently throughout to

designate a degree or level of seriousness.

DANGER: A danger statement describes a potentially hazardous situation that if not avoided, will result in severe

personal injury or death and/or property damage.

WARNING: A warning statement describes a potentially hazardous situation that if not avoided, can result in severe

personal injury and/or property damage.

CAUTION: A caution statement describes a potentially hazardous situation that if not avoided, can result in minor

or moderate personal injury and/or property damage.

NOTE: A note provides important information that should not be ignored.

⚠ CAUTION ⚠

These units 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.

⚠ DANGER ⚠

• 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, death, and/or property

damage.

• Heaters certiﬁed for residential use are intended for the 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.

• Installation should be performed by a qualiﬁed agency in accordance with these instructions.

The qualiﬁed service agency installing this unit is responsible for the installation.

Venting and Combustion Air Requirements

⚠ WARNING ⚠

All separated-combustion units MUST BE equipped with both combustion air and exhaust piping

to the outdoors.

MODEL UBZ: SEPARATED-COMBUSTION BLOWER TYPE

MODEL UDZ: SEPARATED-COMBUSTION FAN TYPE

Summary of content (20 pages)

PAGE 1
Revision: CP-UBZ-UDZ-VENT (02-21) 1034632-0 Supersedes: — (Original Version) VENTING INSTRUCTIONS FOR UNIT HEATERS MODEL UBZ: SEPARATED-COMBUSTION BLOWER TYPE MODEL UDZ: SEPARATED-COMBUSTION FAN TYPE GENERAL INFORMATION 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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GENERAL INFORMATION—CONTINUED Venting and Combustion Air Requirements—Continued ⚠ CAUTION ⚠ • 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 venting system may result in the formation of condensate, leakage, and/or spillage. • Do not intermix different vent system parts from different manufacturers in the same venting system.
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Venter Outlet and Combustion Air Inlet Connection Requirements • Venter outlet connection on unit sizes 030, 045, and 060: when using 3-inch diameter pipe, a 4- to 3-inch (102to 76-mm) taper-type reducer is required at the venter outlet—for category III, attach a 4-inch appliance adapter from a category III pipe manufacturer directly to the collar and then use a reducer if using 3-inch pipe.
PAGE 4
GENERAL INFORMATION—CONTINUED Venting and Combustion Air Requirements—Continued Pipe Size Requirements—Continued Table 3. Diameter and Length of Pipe from Heater to Concentric Adapter Box Diameter (Inches (mm)) Unit Size Vent Pipe Inlet Air Pipe Maximum Vent Length Feet (Meters) Equivalent Straight Length* 90-Degree Elbow 45-Degree Elbow 15 (4.6) 2 (0.6) 1 (0.3) 10 (3) 25 (7.6) 3 (0.9) 1.5 (0.5) 060 15 (4.6) 1.5 (0.5) 1 (0.3) 075 25 (7.6) 3 (0.9) 1.5 (0.5) 100, 125 35 (10.7) 4 (1.2) 2 (0.
PAGE 5
Condensation Mitigation • 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 at the low point of the vent system with a tee, a drip leg, and a cleanout 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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INSTALLATION—CONTINUED Concentric Adapter Box Connections—Continued Heater Connection Side Vent Terminal Connection Side Indoor combustion air pipe collar Outside combustion air pipe collar Exhaust vent pipe opening Figure 2. Concentric Adapter Box UNIT SIZES 030–125 UNIT SIZES 150–400 Figure 3.
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DETAIL A: Unit Sizes 030, 045, and 060 Using 3-Inch (76 mm) Diameter Pipes DETAIL B: Unit Sizes 030, 045, and 060 Using 4-Inch (102 mm) Diameter Pipes and Unit Sizes 075, 100, 125, 150, 175, 200, 225, and 250 DETAIL C: Unit Sizes 300, 350, and 400 Figure 4.
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INSTALLATION—CONTINUED Concentric Adapter Box Connections—Continued Table 4. Vent Pipe Opening Diameter Unit Size Vent Terminal Configuration Option Vertical Horizontal CC2 CC6 030–125 (5-Inch Vent Pipe)* 150–400 (5-Inch Vent Pipe)* Diameter (Feet (Meters)) 4-21/32 (118) 5-21/32 (144) 4-1/16 (103) 5-1/16 (129) *See Figure 3. Table 5.
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Table 6.
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INSTALLATION—CONTINUED Vent Terminal Options—Continued Vertical Vent Terminal (Option CC2) Installation—Continued Rear View Side View Shaded area represents required continuous (no joints) section of vent pipe. Section of pipe may extend higher. Vent Pipe Figure 7. Option CC2 Installation 2. Install vent pipe and combustion air pipe runs: a. Connect piping to heater in accordance with specifications listed in Venting and Combustion Air Requirements section and subsections. b.
PAGE 11
4. Secure longer angles on concentric adapter box brackets (see Figure 8) to concentric adapter box. NOTE: The longer angle of the concentric adapter box bracket has five 7/32-inch holes that allow the position of the bracket on the box to be adjusted. Figure 8. Concentric Adapter Box Brackets 5. Connect outside section of combustion air pipe to concentric adapter box (see Figure 9): a.
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INSTALLATION—CONTINUED Vent Terminal Options—Continued Vertical Vent Terminal (Option CC2) Installation—Continued 6. Secure concentric adapter box to underside of roof (see Figure 9): ⚠ CAUTION ⚠ • If the roof is combustible, ensure that brackets are positioned to allow a 2-inch (51 mm) clearance between the concentric adapter box and the roof. • If any holes are made in the concentric adapter box in error, ensure that they are sealed. a. Insert combustion air pipe through roof as shown in Figure 10. b.
PAGE 13
8. Install combustion air inlet (see Figure 11): a. Install additional section of vent pipe if needed on outside and make joint in accordance with pipe manufacturer’s requirements. b. When vent pipe is required height, slide combustion air inlet over vent pipe and fasten collar to combustion air pipe using sheet metal screws. c. Seal opening at top between vent pipe and combustion air inlet to prevent water leakage using silicone sealant.
PAGE 14
INSTALLATION—CONTINUED Vent Terminal Options—Continued Horizontal Vent Terminal (Option CC6) Installation—Continued INLET GUARD EXHAUST GRILL Figure 12. Option CC6 Components Install the horizontal vent kit as follows: ⚠ DANGER ⚠ • To prevent combustion products from entering the occupied space, all vent terminals must be positioned or located away from fresh air intakes, doors, and windows. Failure to comply could result in severe personal injury or death and/or property damage.
PAGE 15
e. Refer to Table 9 to ensure that location complies with minimum clearance requirements. Table 9. Minimum Clearance Requirements for Horizontal Vent Termination Location Component/Structure Forced air inlet within 10 feet (3.
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INSTALLATION—CONTINUED Vent Terminal Options—Continued Horizontal Vent Terminal (Option CC6) Installation—Continued 125. TOP VIEW SIDE VIEW UDAS/UDBS Sizes X* Y ft M inches mm 229 4 1 9 060, 075, 100 4 1 12 305 125, 150, 175, 200, 225 4 1 24 610 250, 300, 350, 400 6 2 36 914 *Minimum : check and comply with local codes. 030, 045 Figure 13.
PAGE 17
7. Install inlet guard: a. Position inlet guard over end of combustion air pipe in accordance with Figure 13. b. Secure inlet guard to inlet air pipe using four 1/2-inch-long screws provided. 8. Install terminal-end vent pipe: NOTE: The length of the terminal-end vent pipe is determined by the installation within maximum and minimum requirements.
PAGE 18
APPENDIX: INSTRUCTIONS FOR ATTACHING DOUBLE-WALL TYPE B VENT PIPE TO SINGLE-WALL PIPE NOTE: Work quickly to assemble components before sealant dries. STEP 1: Place continual 1/4inch bead of silicone sealant around circumference of single-wall pipe. STEP 2: Before sealant can dry, insert single-wall pipe into inner pipe of double-wall pipe until bead of sealant contacts inner pipe to create sealed joint. STEP 3: Drill three small holes spaced equally around doublewall pipe below sealant ring.
PAGE 19
NOTES CP-UBZ-UDZ-VENT (02-21) 1034632-0 19