Reznor UBX User manual

Revision: UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (04-22) 1036421-A
DOWNTURN NOZZLE KIT INSTALLATION FOR UNIT HEATERS
Supersedes: UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (01-22) 1036421-0
OPTIONS CD2, CD3, CD4, AND CD5 FOR MODELS UBX, UBZ, UDX, UDZ, AND UEZ
•Downturn nozzles are designed to direct the discharge air in a more vertical flow.
•Refer to the installation manual provided with the heater for important safety information.
•Ensure that all components listed in Table 1 are available before beginning installation.
Table 1. Downturn Nozzle Kit Components
Component Option
Unit Size (UBX, UBZ, UDX, UDZ) Unit Size (UEZ)
UB/UD
Model
030,
045
060,
075
100,
125
150,
175,
200
225,
250
300,
350,
400
055 085 110 130,
180
260,
310
PN
Kit Packages
Kit package
CD2 UBX, UDX 1036261 1036262 1036263 1036264 1036265 1036266 1041269 1041272 1041275 1036270 1036272
UBZ, UDZ 1036267 1036268 1036269 1036270 1036271 1036272
CD3 UBX, UDX 1036273 1036274 1036275 1036276 1036277 1036278 1041270 1041273 1041276 1036282 1036284
UBZ, UDZ 1036279 1036280 1036281 1036282 1036283 1036284
CD4 UBX, UDX 1036285 1036286 1036287 1036288 1036289 1036290 1041271 1041274 1041277 1036297 1036296
UBZ, UDZ 1036291 1036292 1036293 1036294 1036295 1036296
CD5 UBX, UDX 1036306 1036307 1036308 1036309 1036310 1036311 —
UBZ, UDZ 1036312 1036313 1036314 1036315 1036316 1036317
Common Parts
Nozzle
section,
right side*
CD2,
CD3,
CD4 All 1033918 1034681 1034682 1034683 1034684 1034685 1036677 1036683 1036689 1034683 1034685
CD5 1033918 1034681 1034682 1034683 1034684 1034685 —
Nozzle
section,
left side*
CD2,
CD3,
CD4 All 1033917 1034676 1034677 1034678 1034679 1034680 1036676 1036682 1036688 1034678 1034680
CD5 1033917 1034676 1034677 1034678 1034679 1034680 —
Nozzle
section,
top*
CD2,
CD3,
CD4 All 1033919 1034671 1034672 1034673 1034674 1034675 1036675 1036681 1036687 1034673 1034675
CD5 1033919 1034671 1034672 1034673 1034674 1034675 —
Nozzle
section,
bottom*
CD2,
CD3,
CD4 All 1033921 1034669 1034670 1036678 1036684 1036690 1034669 1034670
CD5 1033921 1034669 1034670 —
Nozzle
blockoff
CD2,
CD3,
CD4
UBX, UDX 1036215 1034686 1036205 1036206 1036207 1036208
1036680 1036686 1036692 1036212 1036214
UBZ, UDZ 1036209 1036210 1036211 1036212 1036213 1036214
CD5 UBX, UDX 1036215 1034686 1036205 1036206 1036207 1036208 —
UBZ, UDZ 1036209 1036210 1036211 1036212 1036213 1036214
Kit-Specific Parts
Blockoff
panel
CD3 All 1033920 1036216 1036217 1036218 1036219 1036220 1036679 1036685 1036691 1036218 1036220
CD5 1033920 1036216 1036217 1036218 1036219 1036220 —
Vertical
louver frame
CD4 All 1028413 1028433 1028443 1033695 1033715 1033728 1036666 1036668 1036670 1033695 1033728
CD5 1028413 1028433 1028443 1033695 1033715 1033728 —
Vertical
louver**
CD4 All 1028418 1028434 1028441 1033904 1033961 1033730 1036667 1036669 1036671 1033904 1033730
CD5 1028418 1028434 1028441 1033904 1033961 1033730 —
*Quantity is two (2) for options CD3 and CD5. All other quantities are (1) unless otherwise indicated.
**Quantity is five (5) for model UBX, UBZ, UDX, and UDX unit sizes 030–125. Quantity is six (6) for model UEZ unit sizes 055 and 085. Quantity
is seven (7) for model UEZ unit size 110. Quantity is eight (8) for model UBX, UBZ, UDX, and UDX unit sizes 150–400 and model UEZ unit sizes
130–310.

2UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (04-22) 1036421-A
INSTALLATION
NOTE: Before installing a downturn nozzle, ensure that the unit is installed with four-point suspen-
sion in accordance with the installation manual provided with the unit and ensure that the location
provides sufficient clearance for the nozzle option being installed.
Install the downturn nozzle kit as follows:
1. Assemble downturn nozzle assembly (see Figure 1) as follows:
a. Secure both side sections to top section using screws.
b. Slide bottom section into place so that it rests on small tabs on each side.
c. If installing option CD3 or CD5, assemble second nozzle section. Sections will be joined in step 12.
CD2, CD4
CD3, CD5
NOZZLE BLOCKOFF
BLOCKOFF
PANEL
Figure 2. Typical Face Plate Assembly and Louver Frame
Figure 1. Downturn Nozzle Assemblies
2. If heater is already 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 door on right side of unit to access screws that secure face plate assembly (see Figure 2) to front of
unit. Remove screws and remove face plate assembly.
FACE PLATE ASSEMBLY
FACE PLATE
LOUVER FRAM
E

3
UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (04-22) 1036421-A
5. If installing option CD4 or CD5, position louver frame (see Figure 2) in face plate outlet so that holes align and
secure frame to face plate using screws from kit.
6. Position downturn nozzle assembly in face plate so that holes align and secure nozzle to face plate using screws
from kit.
7. Install nozzle blockoff (see Figure 1) and secure to face plate using screws from kit.
8. Position face plate assembly with downturn nozzle assembly so that holes align and secure both assemblies—
through face plate opening on left side, top, bottom and through door opening on right side—to front of unit using
screws from kit. Replace door on right side of unit.
9. Secure nozzle blockoff installed in step 7 to right panel of unit.
10. If installing option CD3 or CD5, secure blockoff panel (see Figure 1) to nozzle blockoff installed in step 7.
11. If installing option CD3 or CD5, position second assembled nozzle section in outlet of nozzle already attached
to heater. Secure second nozzle section to first nozzle section using screws from kit to create downturn with two
sections.
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.
12. Install vertical louvers in louver frame as follows:
a. On notched end of louver, slide compression 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.
b. With wider louver blade facing in toward heat exchanger, push tab with compression 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.
c. Install all remaining louvers in accordance with steps 12a and 12b.
Figure 3. Louver Installation
13. Install horizontal louvers removed in step 3.
COMPRESSION
SPRING
COMPRESSION
SPRING

Specifications and illustrations subject to change without notice or incurring obligations.
Latest version of this manual is available at www.reznorhvac.com.
©2022 Nortek Global HVAC LLC, O’Fallon, MO. All rights reserved.
UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (04-22) 1036421-A
INSTALLATION—CONTINUED
⚠ 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.
14. Adjust horizontal and vertical louvers to provide desired throw pattern.
15. Turn ON gas and electric power.
16. Light heater in accordance with lighting instructions.
17. Check for proper operation.