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American Standard
Furnace
*UD Series
American Standard *UD Series User Manual
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40” Residential Gas
Furnace Operation
40” Residential Gas
Furnace Operation
•
Model Evolution/Nomenclature
•
Heating Sequence of Operation
•
Schematics
•
Ignition Systems
•
Service/T
roubleshooting
•
Model Evolution/Nomenclature
•
Heating Sequence of Operation
•
Schematics
•
Ignition Systems
•
Service/T
roubleshooting
©
American Standard Inc. 1
999
©
American Standard Inc. 1
999
2
Table of Contents
Table of Contents
2
Model Evolution
4
Model Nomenclature
5
Component Identification - UD/ DD-R Models
6
Component Identification - UY/ DY-R Models
7
Integrated Furnace Controls (I.F.C.)
8
Heating Blower on and off Delay
9
Dip-Switch Settings or Jumper Wire
9
LED Flash Rate
10
Self Diagnostic Features 50A50 and 50A51
10
Integrated Furnace Control Timing
11
Abnormal Furnace Operation - 50A50 and 50A51
12
Single Stage 50A50 Sequence of Operation
15
Wiring Schematic - Single Stage 50A50 Integrated Furnace Control
16
Two Stage 50A51-405 Sequence of Operation
17
Wiring Schematic - Two Stage Heat 50A51-405 Integrated Furnace Control
18
White-Rodgers Integrated Furnace Controls
19
Two Stage Variable Speed Sequence of Operation
19
Furnace Controls
20
Wiring Schematic - Two Stage Variable Speed 50A51-505/50A51-506 Integrated Furnace Control
20
Integrated Control Quick Reference
21
Furnace ECM TM 2 Motor Operation
22
ECM TM 2 Variable Speed Furnace Motor Quick Check
23
Schematic - Motor Control Board
25
Flame Rectification Principle - Measurement
26
Flame Current Tester/Simulator
27
Combustion Air Pressure Switch Check - Measurement
28
Furnace Pressure Switch Settings
29
Gas Valves
30
Models Maybe an a or T or F
30
Manifold Pressure Settings
32
Direct Vent Manifold Pressure Check
33
Determining Natural Gas Furnace Input
34
Single Stage Twinning Kit
35
Field Wiring Diagrams - Single Stage and Two Stage Thermostats
36
Two Stage Twinning Kit
37
Fields Wiring Diagram - Twinning UD-R Furnaces
38
Single Wire Twinning - for Models with Twin Terminals
39
Radiant Sense Ignition Controls
40
Identifying Radiant Sense Controls
41
Radiant Energy Sensor
42
50A52-100 Sequence of Operation
43
Wiring Schematic - Version 1 Radiant Sense Control
44
50A52-100 Sequence of Operation
45
Wiring Schematic - Version 2 Radiant Sense Control
46
50A52-100 Sequence of Operation
47
Wiring Schematic - Version 3 Radiant Sense Control
48
50A52-100/101/102 Sequence of Operation
49
Wiring Schematic - Version 4 Radiant Sense Control
50
Troubleshooting Procedures
51
50A50 Flow Chart 1
52
50A50 Flow Chart 2
53
50A50 Flow Chart 3
54
50A50 Flow Chart 4
55
50A50 Flow Chart 5
56
50A51 Flow Chart 1
57
50A51 Flow Chart 2
58
50A51 Flow Chart 3
59
50A51 Flow Chart 4
60
50A51 Flow Chart 5
61
50A52 Flow Chart 1
62
50A52 Flow Chart 2
63
50A52 Flow Chart 3
64
50A52 Flow Chart 4
65
Legends - System Wiring
66
4
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American Standard *UD Series Specifications
General
Brand
American Standard
Model
*UD Series
Category
Furnace
Language
English
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