Installation manual
1.0 General ............................................... 2
1.1 Hazard Labels and Notices .................2
1.2 General Information .............................3
1.3 Warranty ..............................................3
1.4 Installation Codes ................................3
2.0 Unit Heater Location ........................ 4
3.0 Receiving, Uncrating, and
Preparing for Installation ................. 5
4.0 Dimensions and Clearances ............ 6
4.1 Dimensions ..........................................6
4.2 Clearances ..........................................7
5.0 High Altitude Operation .................... 7
6.0 Hanging the Heater............................ 7
7.0 Mechanical ......................................... 8
7.1 Gas Piping and Pressure .....................8
7.2 Venting and Combustion Air .............13
7.3 Condensate Drain System .................26
8.0 Electrical and Wiring ....................... 28
8.1 Electrical Supply ................................28
8.2 24V Control Wiring Connections .......28
8.3 Typical Wiring Diagram ...................... 29
9.0 Controls ............................................ 30
9.1 Thermostat.........................................30
9.2 Gas Valve ..........................................30
9.3 Safety Controls ..................................30
10.0 Ignition System .............................. 31
11.0 Commissioning and Startup ......... 34
11.1 Check the Installation Prior
to Startup .........................................34
11.2 Heater Startup..................................34
11.3 Check Installation After Startup........36
12.0 Maintenance and Service.............. 36
12.1 Maintenance Schedule ....................36
12.2 Maintenance Procedures .................37
12.3 Troubleshooting ..............................43
APPENDIX .............................................. 46
INDEX...................................................... 47
INSTALLATION RECORD ..................... 48
1.1 Hazard Labels and Notices
There are warning labels on the unit and throughout this manual. For your safety,
read the denitions below and comply with all boxes labeled CAUTION, WARN-
ING, and DANGER during installation, operation, maintenance and service of this
heater.
Denitions of Hazard Intensity Levels in this Manual
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-red appliances are not designed for use in
hazardous atmospheres containing ammable vapors or
combustible dust, in atmospheres containing chlorinated
or halogenated hydrocarbons, or in applications with
airborne silicone substances. See Hazard Levels above.
1.0 General
Table of Contents
Form I-UEAS, Page 2