Reznor UDX Installation, Operation And Maintenance

10
UBX-UBZ-UDX-UDZ-IOM (07-23) 1034344-K
Clearances
Units must be installed so that the clearances listed in Table 6 are provided for with regards to combustion air space,
inspection, and service and for proper spacing from combustible construction. Clearance to combustibles is defined
as the minimum distance from the heater to a surface or object for which it is necessary to ensure that a surface
temperature of 90°F (50°C) above the surrounding ambient temperature is not exceeded. Refer to the dimensions
listed in Table 4 and Table 5 and shown in Figure 2 and Figure 3 when determining clearances to combustibles.
GENERAL INFORMATION—CONTINUED
Dimensions—Continued
Table 5. Dimensions—Models UDX and UDZ
Dimension
(See Figure 3)
Unit Size
030, 045 060 075 100 125 150, 175, 200 225, 250 300, 350, 400
Inches (mm)
A 13-3/4 (349) 16-3/4 (425) 24-3/4 (629) 20-1/8 (511) 26-1/8 (664) 34-1/8 (867)
B 27 (686) 38-3/16 (970) 41 (1041)
C 10 (254) 13 (330) 21 (533) 16 (406) 22 (559) 30 (762)
D 13-13/16 (351) 23 (584)
E 29-3/4 (756) 32-23/32 (831) 31-29/32 (810) 34-9/32 (871) 34-9/32 (871) 48-7/16 (1230) 48-29/32 (1243)
F 25-9/16 (649) 40 (1016)
G 6 (152) 8-11/16 (221) 15-5/16 (389) 9-5/8 (244) 13-1/16 (332) 17-1/16 (433)
H 5-15/16 (151) 8-5/16 (211) 8-1/2 (216)
J 3-1/2 (89) 6 (152) 8-29/32 (226) 5-3/8 (137) 9 (229) 11-13/16 (300)
K 3-11/32 (85) 6-1/2 (165) 7-5/16 (186)
M*
17-3/8 (441) 25-11/16 (652) 27-11/16 (703)
N*
1-9/16 (40) 1-13/32 (36)
P*
4-9/32 (109) 8-1/8 (206)
Q*
13 (330) 22-3/16 (564)
R**
11-9/16 (294) 16-3/8 (416) 15-5/8 (397) 16-1/4 (413)
S 3-3/4 (95) 4-1/16 (103) 5-15/32 (139) 5-1/2 (140) 8-1/16 (205) 11-9/16 (294)
T 2-15/16 (75) 4-1/4 (108) 4-5/16 (110) 4-1/2 (114)
*Heater suspension points for four-point suspension (3/8-16 FEM).
**Heater suspension points for two-point suspension (3/8-16 FEM).
Table 6. Clearances
Heater
Surface
Unit Size
030–125 150–400
Minimum Clearance (Inches (mm))
Top 1 (25) 4 (102)
Flue connector 6 (152) 6 (152)
Access panel 18 (457) 18 (457)
Non-access side 1 (25) 2 (51)
Bottom*
1 (25) 1 (25)
Rear**
18 (457) 18 (457)
Front
Refer to values for variable X (distance from heater to start of floor coverage)
in Heater Throw section
*Suspend the heater so that the bottom is a minimum of 5 feet (1.5 meters) above the floor.
**Measure rear clearance from the fan motor.

Reznor UDX Specifications

General

Model	UDX
Category	Heater
Fuel Type	Natural Gas or Propane
Ignition System	Direct Spark Ignition
Installation	Horizontal or Vertical
Heat Exchanger Material	Aluminized Steel
Dimensions	Varies by model
Weight	Varies by model
Heating Capacity	30, 000 to 400, 000 BTU/hr
Efficiency	83%
Vent Type	Separated Combustion
Voltage	115V
Control Type	Thermostat
Type	Gas-fired unit heater