Trane YSC120 User Manual

3
Contents
RT-SVX31A-EN
Introduction
Literature Change History ................. 2
Overview of Manual .......................... 2
Model Number Description ............... 2
Unit Nomenclature ............................ 4
General Information
Unit Nameplate ................................. 5
Compressor Nameplate .................... 5
Unit Description................................. 5
Economizer Control Actuator
(optional) ........................................... 5
ReliaTel
Trane Communication Interface
(optional) ........................................... 5
ReliaTel
LonTalk Communication Interface
(optional) ........................................... 5
ReliaTel
Options Module
(optional) ........................................... 5
System Input Devices
and Functions .............................6 & 7
Pre - Installation
Unit Inspection .................................. 8
Unit Storage ...................................... 8
Unit Installation Clearances .............. 9
Unit Dimensions .............................. 10
Unit / Accessory Weights ................ 12
Rigging and Center-of-Gravity Data 12
Installation
Foundation ...................................... 13
Unit Supply & Return Air Openings . 14
Ductwork ......................................... 15
Roof Curb........................................ 15
Rigging ............................................ 16
Factory Installed Economizer.......... 16
Temperature Limit Switch Usage
for Gas Heat Units........................... 17
Gas Heat Technical Data ................ 17
Horizontal Discharge Conversion
YSCO60 .......................................... 18
YSC072 - 120 ................................. 19
TCO-A Instructions:......................... 20
Requirements for Gas Heat ............ 21
Condensate Drain Configuration..... 21
Condensate Trap Installation .......... 21
Filter Installation .............................. 22
Main Unit Power Wiring .................. 22
Field Installed Control Wiring .......... 22
Control Power Transformer ............. 22
Controls using 24 VAC .................... 22
24V AC Conductors with Reliatel .... 23
Controls using
DC Analog Input/Outputs ................ 23
Customer Low Voltage Routing- ..... 24
Typical Field wiring
for Optional Controls- ...................... 25
Space Temperature Averaging ........ 26
Temperature vs Resistance............. 27
Sizing Natural Gas Pipe
Mains & Branches ........................... 27
Voltage Imbalance........................... 28
Electrical Phasing ........................... 28
(Three Phase Motors) ..................... 28
Pre - Start
Service Test Guide for
Component Operation ..................... 30
Verfiying Proper Airflow ................... 31
Economizer Start-up........................ 32
Compressor Start-Up ...................... 32
Scroll Compressors......................... 32
Gas Heat Units................................ 32
Final System Setup
Final System Setup ......................... 33
Maintenance
Fan Belt Adjustment - ...................... 34
Belt Tension Gauge ......................... 35
Filters .............................................. 36
Cooling Season............................... 36
Heating Season .............................. 36
Annual Maintenance ....................... 37
Final Process .................................. 37
Sample Maintenance Log ............... 38
Trouble Shooting
ReliaTel Control............................... 39
System Status Checkout Procedure 39
LED 4 (Service)............................... 39
System failure ................................. 39
Heating Failure................................ 39
Cooling Failure ................................ 40
Service Failure ................................ 40
Simultaneous Heat and Cool Failure40
Cool Failure..................................... 40
Cooling and Ignition Lockouts ......... 40
Zone Temperature Sensor
(ZTS) Service Indicator ................... 40
Fan Failure Switch .......................... 41
Zone Temperature Sensor
(ZTS) Test ....................................... 41
Zone Temperature Thermistor
(ZTEMP) ......................................... 41
Cooling Set Point (CSP) and
Heating Set Point (HSP) ................. 41
Testing
serial communication voltage.......... 41
Wiring Schematic
Control Schematic ........................... 43
Power Schematic ............................ 44

Trane YSC120 Specifications

General

Model	YSC120
Category	Air Conditioner
Phase	3
Refrigerant	R-410A
Cooling Capacity	120000 BTU/H