Table of Contents
6 RT-SVX36K-EN
Precautionary Measures ............. 77
First Aid Measures .................. 77
Electrical Connection .................. 77
Requirements for Gas Heat ........... 78
Requirements for Hot Water Heat (SLH*) 78
Requirements for Steam Heat (SSH*) . . 78
Space Pressure Sensor and Tubing Installa-
tion (All units with Statitrac) .......... 78
Condensate Drain Connections ........ 78
Supply and Return Duct Connections . . . 79
Lifting procedures .................... 79
Unit Rigging & Placement ............ 79
Installation Checklist .................... 84
20-130 Ton, Air-Cooled and Evaporative Con-
densing ........................... 84
Unit Start Up ........................... 86
Cooling Sequence of Operation ....... 86
Gas Heating Sequence of Operation . . . 91
Modulating Gas Sequence of Operation—Full
and Limited Modulating Gas Furnace . . 92
Electric Heat Sequence of Operation . . . 93
Wet Heat Sequence of Operation ...... 93
Voltage Supply and Voltage Imbalance . 95
Verifying Proper Fan Rotation ........ 101
Direct-Drive Supply Fan Speed Adjustment
101
System Airflow Measurements ....... 102
VAV Systems with DDP Supply Fan . . . 104
Exhaust Airflow Measurement (Optional with
all Units) ......................... 104
Traq Sensor Airflow Measurement (Optional
with all units equipped with an economizer)
105
Return Plenum Pressure Control (Units
equipped with Return Fan) .......... 105
Economizer Damper Adjustment ..... 125
Compressor Start-Up (All Systems) . . . 127
Compressor Operational Sounds ..... 129
Evaporative Condenser Startup ...... 130
Pressure Curves ................... 131
Thermostatic Expansion Valves ...... 147
Charging by Subcooling .............148
Low Ambient Dampers ..............148
Gas Furnace Start-Up (Constant Volume &
Variable Air Volume Systems) ........150
Two Stage Gas Furnace ..............150
Full Modulating Gas Furnace .........152
Limited Modulating Gas Furnace ......153
Final Unit Checkout .................154
Startup Checklists ......................155
20-75 Ton — Air-Cooled .............155
24-89 Ton — Evaporative Condenser . . .157
90-130 Ton — Air Cooled .............161
Maintenance ...........................165
Fan Belt Adjustment ................171
Scroll Compressor Replacement ......172
Scroll Compressor Replacements .....173
Monthly Maintenance ...............178
Coil Cleaning ......................179
Fall Restraint .......................182
Final Process .......................182
Unit Wiring Diagram Numbers ...........184
Warranty ..............................187
Commercial Equipment Rated 20 Tons and
Larger and Related Accessories .......187
Factory Warranty Information .........187
Index ..................................188