Armstrong World Industries 243, 302, 242, 122, 123, 203, 182, 183 manual Unit Components

Service Reference Manual UNIT COMPONENTS

5-1

Section 5 - Unit Components

Transformer	5-3
Gas Valves	5-4
White-Rodgers 25K49	5-4
Honeywell 8105	5-5
Blower Control Boards	5-6
United Technologies Model 1010-611	5-6
Heatcraft Model IBC-H4C401	5-7
Ignition Controls	5-8
Fenwal Triton 2461D	5-8
Fenwal 05-29 DSI	5-10
Integrated Blower/Ignition Controls .... 5-11
Induced Draft Blower	5-14
Burners	5-15
Manifold Orifices	5-17
Contactor	5-18
Main (High) Limit Switch	5-19
Flame Rollout Switch	5-20
Pressure Switch	5-21
Pressure Switch Problems	5-23
Checking Pressure Switch Operation	5-24
Compressors	5-28
Tecumseh	5-30
Copeland	5-32
Drier-Filters	5-34

SRM-HW/HWC 2/99