Reznor UDAS Unit Installation Manual - Manual (Page 2)

Page 2
HAZARD INTENSITY LEVELS
1. DANGER: Failure to comply will result in severe personal
injury or death and/or property damage.
2. WARNING: Failure to comply could result in severe personal
injury or death and/or property damage.
3. CAUTION: Failure to comply could result in minor personal
injury and/or property damage.
WARNING
Gas-fired appliances are not designed for use in hazardous
atmospheres containing flammable vapors or combustible
dust, in atmospheres containing chlorinated or halogenated
hydrocarbons, or in applications with airborne silicone
substances. See Hazard Levels, above.
WARNING
Should overheating occur, or the gas supply control system
fail to shut off the flow of gas, shut off the manual gas valve
to the utility heater before shutting off the electrical supply.
1.0 General 1.1 Hazard Labels and Notices
There are warning labels on the unit and throughout this manual. For your safety, read
the definitions below and comply with all boxes labeled CAUTION, WARNING, and
DANGER during installation, operation, maintenance, and service of this heater.
Definitions of Hazard Intensity Levels in this Manual
Table of Contents
1. General ....................................................... 2-4
1.1 Hazard Labels and Notices ............................ 2
1.2 General Installation Information .................... 3
1.3 Warranty .......................................................... 4
1.4 Installation Codes ........................................... 4
2. Unit Heater Location .................................. 4-6
2.1 Heater Throw .................................................. 4
2.2 Location Recommendations .......................... 5
3. Uncrating and Preparation ........................ 6-7
3.1 Uncrating and Inspecting ............................... 6
3.2 Preparing for Installation ............................... 6
4. Clearances and Dimensions .................... 7-9
4.1 Clearances ....................................................... 7
4.2 Dimensions ..................................................... 8
5. Hanging the Heater ................................ 10-11
5.1 Weights .......................................................... 10
5.2 Lifting and Suspending ................................ 10
6. Mechanical ............................................. 11-16
6.1 Gas Piping and Pressures ............................11
6.2 Combustion Air - Standard Power Vent and
Standard Power Vent with CV Option Models 16
7. Electrical Supply and Wiring ................ 16-22
7.1 General .......................................................... 16
7.2 Supply Wiring ................................................ 17
7.3 24V Control Wiring Connections ................. 17
7.4 Wiring Diagrams ........................................... 18
7.5 Electrical Operating Components ............... 21
8. Controls and Operation ......................... 22-26
8.1 Thermostat .................................................... 22
8.2 DDC Controls, Options D10 and D14 .......... 23
8.3 Ignition System ............................................. 24
9. Commissioning and Startup ................. 27-28
9.1 Check the installation prior to startup: ....... 27
9.2 Heater Startup: .............................................. 27
9.3 Check installation after startup: .................. 28
10. Maintenance and Service .................... 29-36
10.1 Maintenance Schedule ............................... 30
10.2 Maintenance Procedures ........................... 31
10.3 Troubleshooting ......................................... 36
APPENDIX ....................................................... 38
Index ................................................................ 39
INSTALLATION RECORD .............................. 40