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American Standard
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YHC120A
American Standard YHC120A User Manual
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Installation
Oper
ation and
Maint
enance
June 2008
RT
-
SV
X
21
F-
E
N
Model Numbers
:
Y
SC036A - Y
SC1
20A
YHC036E - YHC060E
YHC033A - YHC1
20A
Y
SC072 - Y
SC1
20E
YS
C
0
3
6
E
-
YS
C
0
6
0
E
P
ac
k
ag
ed Gas/Electr
ic
3 - 1
0 T
on
2
Table of Contents
Hazard Identification
2
Unit Inspection
2
Storage
2
Overview of Manual
2
Table of Contents
4
Model Number Description
6
General Information
8
Unit Clearances
12
Unit Dimensions
12
Pre-Installation
15
Installation
16
Foundation
18
Roof Curb
19
General Unit Requirements
20
Horizontal Discharge Conversion
21
TCO-1 Instructions
22
Horizontal Discharge Conversion
22
Return Air Smoke Detector
23
Through the Base Gas Installation
24
Requirements for Gas Heat
25
Filter Installation
26
Field Installed Power Wiring
26
Main Unit Power
26
Controls Using DC Analog Input/Outputs
27
Smoke Detector Customer Low Voltage Wiring
30
Space Temperature Averaging
31
Voltage Imbalance
34
Electrical Phasing
34
Pre-Start
34
Test Modes
36
Verifying Proper Air Flow
37
Reliatel Control
37
Electro Mechanical Control
37
Start-Up
37
Verifying Proper Air Flow
38
Return Air Smoke Detector
39
Economizer Start-Up
39
Compressor Start-Up
39
Final System Setup
40
Fan Belt Adjustment - Belt Drive Units
41
Monthly Maintenance
41
Filters
41
Maintenance
41
Annual Maintenance
44
Final Process
44
Reliatel Control
45
System Status Checkout Procedure
45
Trouble Shooting
45
Resetting Cooling and Ignition Lockouts
46
Zone Temperature Sensor (ZTS) Service Indicator
46
Clogged Filter Switch
47
Fan Failure Switch
47
Zone Temperature Sensor (ZTS) Test
47
Unit Economizer Control (ECA) Troubleshooting
48
Resetting Cooling and Ignition Lockouts
49
Unit Economizer Control (ECA) Test Procedures
49
Combination Gas Electric Air Conditioner
50
Limited Warranty
50
Combination Gas Electric Air Conditioner
51
4
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American Standard YHC120A Specifications
General
Brand
American Standard
Model
YHC120A
Category
Air Conditioner
Language
English
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