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Unit Dimensions

RT-SVX21K-EN 13

Figure 2. 3-5 ton standard efficiency, 3 ton high efficiency

Notes:

1. All dimensions are in inches/millimeters.

2. ½ NPT Gas Connection

Figure 3. 3-5 ton standard efficiency, 3 ton high efficiency - roof curb

Note: All dimensions are in inches/millimeters.

4444 MMMM

10381038 MMMM

10531053 MMMM

Main Page

Table of Contents3
Model Number Description5
Model Number Notes6
Unit Inspection7
Storage7
Unit Nameplate7
Compressor Nameplate7
Microchannel Condenser Barcode ID7
Unit Description7
Economizer Control Actuator (Optional)7
System Input Devices & Functions8
Low Pressure Control9
High Pressure Control9
Power Exhaust Control (Optional)9
Lead/Lag Control (Dual Circuit Only)9
Evaporator Frost Control10
Smoke Detector Sensor (Optional)11
Phase Monitor11
Single Zone Variable Air Volume / Displacement Ventilation (Optional)11
Unit Dimensions12
Installation19
Pre-Installation19
Procedure19
Foundation21
Horizontal Units21
Ductwork21
Roof Curb23
Downflow23
Rigging23
General Unit Requirements24
Factory Installed Economizer24
Temperature Limit Switch Usage for Gas Heat Units25
Horizontal Discharge Conversion (3 through 5 Ton Units)26
TCO-1 Instructions26
Horizontal Discharge Conversion (6 through 10 Ton Units)27
TCO1 Instructions28
Return Air Smoke Detector28
Main Electrical Power Requirements29
Through the Base Gas Installation29
Requirements for Gas Heat30
Condensate Drain Configuration30
Filter Installation31
Field Installed Power Wiring31
Main Unit Power31
Standard Wiring32
Optional TBUE Wiring (through the Base Electrical Option)32
Field Installed Control Wiring32
Control Power Transformer33
Controls Using 24 VAC33
Controls Using DC Analog Input/Outputs (Standard Low Voltage Multi Conductor Wire)33
DC Conductors33
Smoke Detector Customer Low Voltage Wiring38
Space Temperature Averaging (Reliatel™ Only)38
Pre-Start42
Voltage Imbalance42
Electrical Phasing (Three Phase Motors)42
Compressor Crankcase Heaters (Optional)43
Reliatel™ Controls43
Test Modes44
Reliatel Controls44
Electromechanical Controls Test Procedure44
Unit Start-Up46
Verifying Proper Air Flow46
Units with 5-Tap Direct Drive Indoor Fan46
Units with Belt Drive Indoor Fan46
Units with Direct Drive Indoor Fan - Electromechanical Control47
Reliatel Units with Direct Drive Indoor Fan (7.5 - 8½ Ton High Efficiency, 10 Ton)47
Units with Constant CFM Direct Drive Indoor48
Fan48
Return Air Smoke Detector48
Economizer Start-Up49
Compressor Start-Up50
Dehumidification Option50
Gas Heat Units50
Final System Setup50
Maintenance51
Fan Belt Adjustment - Belt Drive Units51
Monthly Maintenance51
Filters51
Return Air Smoke Detector Maintenance51
Condensate Overflow Switch52
Cooling Season52
Heating Season52
Coil Cleaning52
Annual Maintenance54
Final Process54
Troubleshooting55
Reliatel™ Control55
System Status Checkout Procedure55
Method 155
Method 256
Resetting Cooling and Ignition Lockouts56
Method 156
Method 257
Zone Temperature Sensor (ZTS) Service Indicator57
Clogged Filter Switch57
Fan Failure Switch57
Condensate Overflow Switch57
Zone Temperature Sensor (ZTS) Tests57
Test 1 - Zone Temperature Thermistor (ZTEMP)57
Test 2 - Cooling Set Point (CSP) and Heating Set Point (HSP)57
Test 3 - System Mode and Fan Selection57
Test 4 - LED Indicator Test57
Relative Humidity Sensor Test58
Programmable & Digital Zone Sensor Test58
Reliatel Refrigeration Module (RTRM) Default Chart58
Unit Operation Without a Zone Sensor58
Unit Economizer Control (ECA) Troubleshooting58
Reliatel Control58
Electromechanical Control59
Heating Failure59
Cooling Failure59
Resetting Cooling and Ignition Lockouts59
Method 159
Method 259
Unit Economizer Control (ECA) Test Procedures Electromechanical Control59
Test 160
Test 260
Troubleshooting Procedures for Direct Drive Plenum Fan60
Unit Wiring Diagrams Numbers61
Limited Warranty63
Combination Gas Electric Air Conditioner63
YCC, YCD, YCH, YCP, YSC and YHC63
Models Less than 20 Tons for Residential Use63
Ycz, Ycy, Ycx, Ycc, Ycd, Ych, Ycp, Yhc63
And YSC (Parts Only)63
Models Less than 20 Tons for Commercial Use63

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