UWS Downturn Nozzle Kit

Product Information

Specifications

• Product Name: Downturn Nozzle Kit

• Compatible Models: UBX, UBXC, UBZ, UDX, UDXC, UDZ, UEZ,
  UWS

• Options: CD2, CD3, CD4, CD5

• Kit Components: Various components as listed in the manual

Product Usage Instructions

Installation

1. Ensure all components listed in the corresponding table for
   your model are available.

2. Follow the detailed installation steps provided in the
   manual.

Component Assembly

Assemble the kit components according to the instructions
provided. Make sure to match the components with the correct model
and unit size.

Adjusting Nozzle Options

Depending on the desired downturn angle, select the appropriate
CD option from the available choices (CD2, CD3, CD4, CD5). Follow
the guidelines for adjusting the downturn angle provided in the
manual.

Maintenance

Regularly inspect the nozzles and components for any signs of
damage or wear. Replace any worn-out parts to ensure optimal
performance.

FAQ

Q: Can I install this kit on any unit heater model?

A: The kit is compatible with specific gas-fired models (UBX,
UBXC, UBZ, UDX, UDXC, UDZ) and hydronic model UWS. Make sure to
check compatibility before installation.

Q: How do I determine the correct nozzle option for my

unit?

A: Refer to Table 1 in the manual to understand the descriptions
and downturn angles associated with each CD option. Choose the
option that best fits your requirements.

Q: What should I do if I encounter difficulties during

installation?

A: If you face challenges during installation, refer to the
troubleshooting section in the manual or contact customer support
for assistance.

Revision: OPT-CD2,3,4,5 (06-24) 1036421-D Supersedes: OPT-CD2,3,4,5 (01-24) 1036421-C
DOWNTURN NOZZLE KIT INSTALLATION FOR UNIT HEATERS

OPTIONS CD2, CD3, CD4, AND CD5 FOR GAS-FIRED MODELS UBX, UBXC, UBZ, UDX, UDXC, UDZ, AND UEZ
AND HYDRONIC MODEL UWS

· Downturn nozzles are designed to direct the discharge air in a more vertical flow. Ensure that the unit location provides sufficient clearance for the nozzle option that is being installed.
· Refer to the installation manual provided with the heater for important safety information.
· Refer to Table 1 for option descriptions.

Option CD2 CD3

Table 1. Downturn Nozzle Options

Description

Option

Description

Downturn of from 25- to 65-degrees

CD4

CD2 nozzle with vertical louvers (option CD1)

Downturn of from 50- to 90-degrees

CD5

CD3 nozzle with vertical louvers (option CD1)

KIT COMPONENTS
Ensure that all components listed in Table 2, Table 3, or Table 4 are available before beginning installation.

Table 2. Kit Components (Models UBX, UBXC, UBZ, UDX, UDXC, and UDZ)

Unit Size (MBTUh)

Component Option

Model

30, 45

60, 75

100, 125 150, 175, 200 225, 250

PN (Quantity)*

CD2

All UBZ, UDZ**

1036261 1036267

1036262 1036268

1036263 1036269

1036264 1036270

1036265 1036271

CD3

All UBZ, UDZ**

1036273 1036279

1036274 1036280

1036275 1036281

1036276 1036282

1036277 1036283

Kit package

CD4

All UBZ, UDZ**

1036285 1036291

1036286 1036292

1036287 1036293

1036288 1036294

1036289 1036295

CD5

UBX, UBXC, UBZ, UDXC,
UDZ

1036306

1036307

1036308

1036309

1036310

UBZ, UDZ** 1036312

1036313

1036314

1036315

1036316

Right nozzle panel

CD2, CD4 CD3, CD5

All

1033918 1033918 (2)

1034681 1034681 (2)

1034682 1034682 (2)

1034683 1034683 (2)

1034684 1034684 (2)

Left nozzle panel

CD2, CD4 CD3, CD5

All

1033917 1033917 (2)

1034676 1034676 (2)

1034677 1034677 (2)

1034678 1034678 (2)

1034679 1034679 (2)

Top nozzle panel

CD2, CD4 CD3, CD5

All

1033919 1033919 (2)

1034671 1034671 (2)

1034672 1034672 (2)

1034673 1034673 (2)

1034674 1034674 (2)

CD2, CD4

Nozzle bottom

All

CD3, CD5

1033921 1033921 (2)

1033921 1033921 (2)

1033921 1033921 (2)

1034669 1034669 (2)

1034669 1034669 (2)

Nozzle blockoff

CD2, CD3,

All

CD4, CD5 UBZ, UDZ**

1036215 1036209

1034686 1036210

1036205 1036211

1036206 1036212

1036207 1036213

Blockoff panel CD3, CD5

All

1033920

1036216

1036217

1036218

1036219

Louver frame

1028413

1028433

1028443

1033695

1033715

Vertical louver CD4, CD5

All

1028418 (5) 1028434 (5) 1028441 (5) 1033904 (8) 1033961 (8)

Louver spring

195046 (5) 195046 (5) 195046 (5) 195046 (8) 195046 (8)

Screw, sheet metal, 8-18 × 3/8

195638 (AR)

*Quantity is one (1) unless otherwise indicated. AR = as required.

**For model UBZ or UDZ units manufactured before 8 NOV 2022.

300, 350, 400
1036266 1036272 1036278 1036284 1036290 1036296
1036311
1036317 1034685 1034685 (2) 1034680 1034680 (2) 1034675 1034675 (2) 1034670 1034670 (2) 1036208 1036214 1036220 1033728 1033730 (8) 195046 (8)

DO NOT DESTROY. PLEASE READ CAREFULLY. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

KIT COMPONENTS–CONTINUED

Table 3. Kit Components (Model UEZ)

Unit Size (MBTUh)

Component

Option

55

85

110

PN (Quantity)*

CD2

1041269

1041272

1041275

Kit package

CD3

1041270

1041273

1041276

CD4

1041271

1041274

1041277

Right nozzle panel

CD2, CD4 CD3

1036677 1036677 (2)

1036683 1036683 (2)

1036689 1036689 (2)

Left nozzle panel

CD2, CD4 CD3

1036676 1036676 (2)

1036682 1036682 (2)

1036688 1036688 (2)

Top nozzle panel

CD2, CD4 CD3

1036675 1036675 (2)

1036681 1036681 (2)

1036687 1036687 (2)

Nozzle bottom

CD2, CD4 CD3

1036678 1036678 (2)

1036684 1036684 (2)

1036690 1036690 (2)

Nozzle blockoff

CD2, CD3, CD4

1036680

1036686

1036692

Blockoff panel

CD3

1036679

1036685

1036691

Louver frame

1036666

1036668

1036670

Vertical louver

CD4

1036667 (6)

1036669 (6)

1036671 (7)

Louver spring

195046 (6)

195046 (6)

195046 (7)

Screw, sheet metal, 8-18 × 3/8

195638 (AR)

*Quantity is one (1) unless otherwise indicated. AR = as required.

130, 180
1042599 1042601 1036297 1042328 1042328 (2) 1042327 1042327 (2) 1042325 1042325 (2) 1042324 1042324 (2) 1042326 1042597 1033902 1033904 (8) 195046 (8)

260, 310
1042600 1042602 1042603 1042333 1042333 (2) 1042332 1042332 (2) 1042330 1042330 (2) 1042329 1042329 (2) 1042331 1042598 1033728 1033730 (8) 195046 (8)

Table 4. Kit Components (Model UWS)

Unit Size (MBTUh)

Component Option 10/15 15/21, 22/31 32/45

44/62

62/77

83/104

110/137

159/191

PN (Quantity)*

CD2 1047179 1047180 1047181 1047182 1047183 1047184 1047185 1047186

Kit package

CD3 CD4

1047187 1047195

1047188 1047196

1047189 1047197

1047190 1047198

1047191 1047199

1047192 1047200

1047193 1047201

1047194 1047202

CD5 1047203 1047204 1047205 1047206 1047207 1047208 1047209 1047210

Right nozzle panel

1047009 1047018 1047037 1047000 1047046 1047046 1047060 1047027

Left nozzle panel

1047010 1047019 1047038 1047001 1047047 1047047 1047061 1047028

Top nozzle panel

1047011 1047020 1047039 1047002 1047048 1047048 1047062 1047029

Bottom nozzle panel

All

1047012 1047021 1047040 1047003 1047049 1047049 1047063

1047030

Face plate, painted

1042740 1042806 1042823 1042774 1042834 1042858 1042851 1042784

Nozzle bracket

1047036

Reznor logo

1043007

Face plate, unpainted

CD3, CD5

1042740

1042806

1042823

1042774

1042834

1042858

1042851

1042784

Louver frame bottom

1047013 1047022 1047041 1047004 1047050 1047055 1047064 1047031

Louver frame left panel

1047014 1047023 1047042 1047005 1047051 1047056 1047065 1047032

Louver frame right panel
Louver frame top panel

CD4, CD5

1047015 1047016

1047024 1047025

1047043 1047044

1047006 1047007

1047052 1047053

1047057 1047058

1047066 1047067

1047033 1047034

Louver

1047017 (4) 1047026 (5) 1047045 (5) 1047008 (7) 1047054 (7) 1047059 (8) 1047068 (9) 1047035 (11)

Spring, compression

195046 (4)

195046 (5)

195046 (7)

195046 (8) 195046 (9) 195046 (11)

Screw, sheet metal, 8-18 × 3/8

195638 (92)

195638 (120)

*Quantity is one (1) unless otherwise indicated.

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OPT-CD2,3,4,5 (06-24) 1036421-D

INSTALLATION
For a gas-fired unit heater, refer to the Install Downturn Nozzle on Gas-Fired Unit Heater section. For a hydronic unit heater, refer to the Install Downturn Nozzle on Hydronic Unit Heater section. Install Downturn Nozzle on Gas-Fired Unit Heater
DANGER
Before installing a downturn nozzle on a gas-fired unit heater, ensure that the unit is installed using four-point suspension in accordance with the installation manual provided with the unit.
1. Assemble top and side panels of downturn nozzle assembly (see Figure 1): a. Secure right and left panels to top panel using screws from kit. Ensure that panel with slotted holes in bottom of panel is installed on door side of unit. Nozzle bottom will be added in step 7. b. If installing option CD3 or CD5, assemble second nozzle section–sections will be joined in step 6.
NOZZLE BLOCKOFF

CD3, CD5

BLOCKOFF PANEL

CD2, CD4 Figure 1. Gas-Fired Unit Heater Downturn Nozzle Assemblies
2. If heater is installed, turn OFF gas and electric power. Allow time for louvers to cool before proceeding. 3. Remove each horizontal louver by pushing louver toward spring to release louver. 4. Remove face plate assembly (see Figure 2):
a. Loosen screwlock, open access door, disconnect door strap, and remove door. b. Remove and save two screws next to access door slots from back of face plate. c. Remove and save screws that secure face plate to unit and remove face plate assembly.

OPT-CD2,3,4,5 (06-24) 1036421-D

3

INSTALLATION–CONTINUED Install Downturn Nozzle on Gas-Fired Unit Heater–Continued
FACE PLATE ASSEMBLY

VERTICAL LOUVER FRAME

Figure 2. Typical Gas-Fired Unit Heater Face Plate Assembly (with Vertical Louver Frame Shown)
NOTE: The vertical louver frame is installed only on units ordered with either option CD4 or CD5– vertical louvers (option CD1) with either a CD2 nozzle or a CD3 nozzle.
5. If installing option CD4 or CD5, install vertical louver frame (see Figure 2): a. Position frame in face plate outlet so that holes align. b. Secure frame to face plate using screws from kit.
6. If installing option CD3 or CD5, position second assembled nozzle section in outlet of nozzle already assembled. Secure second nozzle section to first nozzle section using screws from kit to create downturn with two sections (see Figure 1).
7. Install downturn nozzle assembly on face plate assembly: a. Position top and side panels assembled in step 1 on back of face plate assembly so that holes align. b. Secure top panel using screws from kit. Do not install screws in side panels at this point. c. Slide nozzle bottom (see Figure 1) into place so that it rests on small tabs on each side. Align holes and secure nozzle bottom to face plate using screws from kit. d. Align holes and secure side panels to face plate using screws from kit.
8. Install downturn nozzle assembly with face plate assembly: a. Position downturn nozzle assembly with face plate assembly so that holes align and secure nozzle to front of unit using existing screws. b. Position nozzle blockoff (see Figure 1) so that holes align and secure to face plate using screws from kit. c. If installing option CD3 or CD5, secure blockoff panel (see Figure 1) to nozzle blockoff. d. Re-install existing two screws in back of face plate next to slots for access door. e. Place access door tabs in slots, reconnect door strap, close door, and tighten screwlock.
NOTE: Before installing the louvers, note the louver curve and determine how the louvers should be positioned to provide the optimal throw pattern. Depending on where the heater is installed and on the desired airflow direction, the louvers may be installed with their curves all in the same direction (either way) or the right half one way and the left the other.

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OPT-CD2,3,4,5 (06-24) 1036421-D

9. Install and adjust louvers: a. If installing option CD4 or CD5, install vertical louvers in louver frame: (1) On notched end of louver, slide louver spring over tab.
NOTE: Depending on the desired throw pattern, the end of the louver with the spring can go either into the frame top or bottom.
(2) With wider louver blade facing in toward heat exchanger, push tab with louver spring into hole in top or bottom louver frame (see Figure 3)–spring compresses. Insert tab on other end of louver into opposite louver frame. For left airflow, compress spring into top louver frame. For right airflow, compress spring into bottom louver frame.
COMPRESSION SPRING

COMPRESSION SPRING
Figure 3. Vertical Louver Installation (3) Install all remaining louvers in accordance with steps 9a(1) and 9a(2). b. Install horizontal louvers removed in step 3.
WARNING
To avoid burns, adjust louvers while the heater is not in operation. If louvers must be adjusted while the heater is operating, wear protective gloves.
c. Adjust all louvers to produce desired throw pattern. 10. Turn ON gas and electric power and check for proper operation. Install Downturn Nozzle on Hydronic Unit Heater 1. If heater is installed, turn OFF hot water and electric power. Allow time for louvers to cool before proceeding. 2. Remove each horizontal louver by pushing louver toward spring to release louver. 3. Assemble downturn nozzle assembly (see Figure 4):
a. Assemble top and side nozzle panels, align holes, and secure panels together using screws from kit. b. Position face plate into nozzle assembly so that holes on side of face plate align with holes on side nozzle panels. c. Secure face plate to nozzle assembly using screws from kit. d. Slide nozzle bottom into place so that it rests on small tabs on each side. Align holes and secure nozzle bottom
to face plate using screws from kit.

OPT-CD2,3,4,5 (06-24) 1036421-D

5

INSTALLATION–CONTINUED Install Downturn Nozzle on Hydronic Unit Heater–Continued
NOZZLE BRACKET

FACE PLATE
Figure 4. Hydronic Unit Heater Downturn Nozzle Assembly
NOTE: The vertical louver frame is installed only on units ordered with either option CD4 or CD5– vertical louvers (option CD1) with either a CD2 nozzle or a CD3 nozzle.
4. If installing option CD4 or CD5, install vertical louver frame: a. Position frame against recessed black face plate on nozzle (see Figure 4). b. Align holes on inside of frame top, bottom, and sides and secure frame to unit using screws from kit.
5. If installing option CD3 or CD5: a. Ensure that first assembled nozzle section that will be attached to unit is assembled with unpainted face plate–second assembled nozzle section will have painted face plate. b. Position second assembled nozzle section in outlet of nozzle already assembled. Secure second nozzle section to first nozzle section using screws from kit to create downturn with two sections.
6. Install downturn nozzle assembly: a. Position assembly against recessed black face plate on unit. b. Align holes on inside of assembly and secure assembly to unit using screws from kit.
NOTE: Before installing the louvers, note the louver curve and determine how the louvers should be positioned to provide the optimal throw pattern. Depending on where the heater is installed and on the desired airflow direction, the louvers may be installed with their curves all in the same direction (either way) or the right half one way and the left the other.

6

OPT-CD2,3,4,5 (06-24) 1036421-D

7. Install and adjust louvers: a. If installing option CD4 or CD5, install vertical louvers in louver frame: (1) On notched end of louver, slide louver spring over tab.
NOTE: Depending on the desired throw pattern, the end of the louver with the spring can go either into the frame top or bottom.
(2) With wider louver blade facing in toward heat exchanger, push tab with louver spring into hole in top or bottom louver frame (see Figure 3)–spring compresses. Insert tab on other end of louver into opposite louver frame. For left airflow, compress spring into top louver frame. For right airflow, compress spring into bottom louver frame.
(3) Install all remaining louvers in accordance with steps 7a(1) and 7a(2). b. Install horizontal louvers removed in step 2.
WARNING
To avoid burns, adjust louvers while the heater is not in operation. If louvers must be adjusted while the heater is operating, wear protective gloves.
c. Adjust all louvers to produce desired throw pattern. 8. Position H2O logo in three holes in right side of face plate and snap into place.
DANGER
Horizontal discharge units with a downturn nozzle require three-point suspension–from the heater’s two 3/8-16 suspension points and from the nozzle bracket provided in the kit that is to be installed on top of the downturn nozzle assembly.
NOTE: If the downturn nozzle is being installed on a unit with downward discharge, the nozzle bracket is not required.
9. For units with downward discharge, proceed to step 10. For units with horizontal discharge, install nozzle bracket as follows: a. Position nozzle bracket on first nozzle as shown in Figure 4 and secure bracket using screws from kit. b. Secure suspension hardware to nozzle bracket.
10. Turn ON hot water and electric power and check for proper operation.

OPT-CD2,3,4,5 (06-24) 1036421-D

7

Specifications and illustrations subject to change without notice or incurring obligations. Latest version of this manual is available at www.reznorhvac.com. ©2024 Nortek Global HVAC LLC, O’Fallon, MO. All rights reserved. OPT-CD2,3,4,5 (06-24) 1036421-D

References

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