Reznor UDX Manual

3
OPT-CL31-CL32 (11-21) 102247-A
INSTALLATION
Install the relay kit as follows. Item numbers refer to Table 2.
1. Turn OFF gas and electric power.
2. Replace transformer on control unit (all models except LDAP, UDBP, UDBS, UBX, and UBZ):
a. Remove or open panel(s) as necessary and locate factory-installed transformer (see Figure 1).
(1) For models APD, UDAP, UDAS, UDX, UDZ, UEAS, and UEZ, transformer is mounted on control board
at bottom of control compartment.
(2) For models F and B, remove left (when facing rear of heater) outer side panel to expose inner side panel
and wiring.
(3) For model VR, open control side only.
Figure 1. Transformer Replacement (Refer to Table 2)
MODELS APD, UDAP, UDAS, UDX, UDZ, UEAS, AND UEZ
UDX, UDZ, UEZ
UNIT SIZES 030–125
MODELS F AND B
MODEL VR
5
5A
5
5 5
UNIT SIZES 030–125
UDX, UDZ, UEZAPD, UDAP, UDAS,
UEAS
APD, UDAP, UDAS,
UEAS
5
5

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