Reznor CD2 User manual

Revision: UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (03-23) 1036421-B
DOWNTURN NOZZLE KIT INSTALLATION FOR
GAS-FIRED UNIT HEATERS
Supersedes: UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (04-22) 1036421-A
OPTIONS CD2, CD3, CD4, AND CD5 FOR MODELS UBX, UBZ, UDX, UDZ, AND UEZ
⚠ DANGER ⚠
Before installing a downturn nozzle, ensure that the unit is installed using four-point suspension
in accordance with the installation manual provided with the unit.
NOTE: 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.
•Downturn nozzles are designed to direct the discharge air in a more vertical flow. Refer to Table 1 for option
descriptions.
DO NOT DESTROY. PLEASE READ CAREFULLY. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
KIT COMPONENTS
Ensure that all components listed in Table 2 or Table 3 are available before beginning installation.
Table 1. Downturn Nozzle Options
Option Description Option Description
CD2 Downturn of from 25- to 65-degrees CD4 CD2 nozzle with vertical louvers (option CD1)
CD3 Downturn of from 50- to 90-degrees CD5 CD3 nozzle with vertical louvers (option CD1)
Table 2. Kit Components—Models UBX, UBZ, UDX, and UDZ
Component Option Model
Unit Size
030, 045 060, 075 100, 125 150, 175, 200 225, 250 300, 350, 400
PN (Quantity)*
Kit package
CD2 UBX, UDX 1036261 1036262 1036263 1036264 1036265 1036266
UBZ, UDZ 1036267 1036268 1036269 1036270 1036271 1036272
CD3 UBX, UDX 1036273 1036274 1036275 1036276 1036277 1036278
UBZ, UDZ 1036279 1036280 1036281 1036282 1036283 1036284
CD4 UBX, UDX 1036285 1036286 1036287 1036288 1036289 1036290
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
Right nozzle
panel
CD2, CD4 All 1033918 1034681 1034682 1034683 1034684 1034685
CD3, CD5 1033918 (2) 1034681 (2) 1034682 (2) 1034683 (2) 1034684 (2) 1034685 (2)
Left nozzle
panel
CD2, CD4 All 1033917 1034676 1034677 1034678 1034679 1034680
CD3, CD5 1033917 (2) 1034676 (2) 1034677 (2) 1034678 (2) 1034679 (2) 1034680 (2)
Top nozzle
panel
CD2, CD4 All 1033919 1034671 1034672 1034673 1034674 1034675
CD3, CD5 1033919 (2) 1034671 (2) 1034672 (2) 1034673 (2) 1034674 (2) 1034675 (2)
Nozzle bottom CD2, CD4 All 1033921 1033921 1033921 1034669 1034669 1034670
CD3, CD5 1033921 (2) 1033921 (2) 1033921 (2) 1034669 (2) 1034669 (2) 1034670 (2)
Nozzle
blockoff
CD2, CD3,
CD4, CD5
UBX, UDX 1036215 1034686 1036205 1036206 1036207 1036208
UBZ, UDZ 1036209 1036210 1036211 1036212 1036213 1036214
Blockoff panel CD3, CD5 All 1033920 1036216 1036217 1036218 1036219 1036220
Louver frame
CD4, CD5 All
1028413 1028433 1028443 1033695 1033715 1033728
Vertical louver 1028418 (5) 1028434 (5) 1028441 (5) 1033904 (8) 1033961 (8) 1033730 (8)
Louver spring 195046 (5) 195046 (5) 195046 (5) 195046 (8) 195046 (8) 195046 (8)
Screw, sheet metal, 8-18 × 3/8 195638 (AR)
*Quantity is one (1) unless otherwise indicated. AR = as required.

2UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (03-23) 1036421-B
INSTALLATION
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.
CD2, CD4
CD3, CD5
NOZZLE BLOCKOFF
BLOCKOFF
PANEL
Figure 1. Downturn Nozzle Assemblies
Table 3. Kit Components—Model UEZ
Component Option
Unit Size
055 085 110 130, 180 260, 310
PN (Quantity)*
Kit package
CD2 1041269 1041272 1041275 1042599 1042600
CD3 1041270 1041273 1041276 1042601 1042602
CD4 1041271 1041274 1041277 1036297 1042603
Right nozzle panel CD2, CD4 1036677 1036683 1036689 1042328 1042333
CD3 1036677 (2) 1036683 (2) 1036689 (2) 1042328 (2) 1042333 (2)
Left nozzle panel CD2, CD4 1036676 1036682 1036688 1042327 1042332
CD3 1036676 (2) 1036682 (2) 1036688 (2) 1042327 (2) 1042332 (2)
Top nozzle panel CD2, CD4 1036675 1036681 1036687 1042325 1042330
CD3 1036675 (2) 1036681 (2) 1036687 (2) 1042325 (2) 1042330 (2)
Nozzle bottom CD2, CD4 1036678 1036684 1036690 1042324 1042329
CD3 1036678 (2) 1036684 (2) 1036690 (2) 1042324 (2) 1042329 (2)
Nozzle blockoff CD2, CD3, CD4 1036680 1036686 1036692 1042326 1042331
Blockoff panel CD3 1036679 1036685 1036691 1042597 1042598
Louver frame
CD4
1036666 1036668 1036670 1033902 1033728
Vertical louver 1036667 (6) 1036669 (6) 1036671 (7) 1033904 (8) 1033730 (8)
Louver spring 195046 (6) 195046 (6) 195046 (7) 195046 (8) 195046 (8)
Screw, sheet metal, 8-18 × 3/8 195638 (AR)
*Quantity is one (1) unless otherwise indicated. AR = as required.
KIT COMPONENTS—CONTINUED

3
UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (03-23) 1036421-B
2. If heater is already installed, turn OFF gas and electric power. Allow time for louvers to cool before proceeding.
3. Remove access door:
a. Loosen screwlock and open door.
b. Disconnect door strap and remove door.
4. Remove face plate assembly (see Figure 2):
a. Remove and save two screws next to access door slots from back of face plate.
b. To access remaining screws that secure face plate, remove each horizontal louver. Push louver toward spring
to compress spring and release louver. Remove and save each louver and spring.
c. Remove and save screws that secure face plate to unit and remove face plate assembly.
Figure 2. Typical 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, position vertical louver frame (see Figure 2) in face plate outlet so that holes align
and 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 installed.
Secure second nozzle section to first nozzle section using screws from kit to create downturn with two sections
(see Figure 1).
7. Mount downturn nozzle assembly to face plate assembly:
a. Position top and side panels assembled in step 1 on back of face plate assembly so that holes align and secure
top panel using screws from kit. Do not install screws in side panels at this point.
b. 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.
c. 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.
9. Re-install access door:
a. Place door tabs in slots and reconnect door strap.
b. Close door and tighten screwlock.
FACE PLATE ASSEMBLY
VERTICAL
LOUVER FRAME

Specifications and illustrations subject to change without notice or incurring obligations.
Latest version of this manual is available at www.reznorhvac.com.
©2023 Nortek Global HVAC LLC, O’Fallon, MO. All rights reserved.
UBX-UBZ-UDX-UDZ-UEZ-CD2,3,4,5 (03-23) 1036421-B
INSTALLATION—CONTINUED
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.
10. 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.
Figure 3. Vertical Louver Installation
(3) Install all remaining louvers in accordance with steps 10a(1) and 10a(2).
b. Re-install horizontal louvers and springs.
⚠ 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 provide desired throw pattern.
11. Turn ON gas and electric power.
12. Light heater in accordance with lighting instructions.
13. Check for proper operation.
COMPRESSION
SPRING
COMPRESSION
SPRING