4 RT-SVX35H-EN
Table of Contents
Overview of Manual . . . . . . . . . . . . . . . . . . 3
Model Number Descriptions . . . . . . . . . . . . . . 5
General Information . . . . . . . . . . . . . . . . . . . . . 7
Unit Nameplate Locations . . . . . . . . . . . . . 7
Precautionary Measures . . . . . . . . . . . . . . 7
Commonly Used Acronyms . . . . . . . . . . . 7
Unit Description . . . . . . . . . . . . . . . . . . . . . 7
Constant Volume (CV) Units . . . . . . . . . . 12
Variable Air Volume (VAV) Units . . . . . . 12
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Unit Inspection . . . . . . . . . . . . . . . . . . . . . 16
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Unit Clearances . . . . . . . . . . . . . . . . . . . . 16
Unit Dimensions & Weight Information . 16
Roof Curb and Ductwork . . . . . . . . . . . . . 27
Pitch Pocket Location . . . . . . . . . . . . . . . . 27
Unit Rigging & Placement . . . . . . . . . . . . 28
General Unit Requirements . . . . . . . . . . . 30
Main Electrical Power Requirements . . . 30
Field Installed Control Wiring . . . . . . . . . 30
Requirements for Electric Heat Units . . . 30
Requirements for Gas Heat . . . . . . . . . . . 30
Requirements for Hot Water Heat (WLHE) 31
Requirements for Steam Heat (WSHE) . . 31
O/A Pressure Sensor and Tubing
Installation . . . . . . . . . . . . . . . . . . . . . . . . 31
Condensate Drain Connection . . . . . . . . 31
Shipping Fasteners . . . . . . . . . . . . . . . . . 32
O/A Sensor & Tubing Installation . . . . . . 33
Gas Heat Units (WFHE) . . . . . . . . . . . . . . 34
Modulating . . . . . . . . . . . . . . . . . . . . . . . . 37
Steam Heat Units (WSHE) . . . . . . . . . . . . 38
Chilled Water Units . . . . . . . . . . . . . . . . . 41
Disconnect Switch External Handle
(Factory Mounted Option) . . . . . . . . . . . . 41
Electric Heat Units (WEHE) . . . . . . . . . . . 42
Power Wire Sizi
ng and Electrical Service
Sizing Equations . . . . . . . . . . . . . . . . . . . . 47
Constant Volume System Controls . . . . . 49
Variable Air Volume System Controls . . .49
Constant Volume or Variable Air Volume
System Controls . . . . . . . . . . . . . . . . . . . . .49
System Start-up . . . . . . . . . . . . . . . . . . . . . . . . .64
Cooling Sequence of Operation
(IntelliPak Controls Only) . . . . . . . . . . . . . .64
Gas Heating Sequence of Operation . . . .65
Modulating Gas Sequence of Operation .66
Voltage Supply and Voltage Imbalance . .74
Verifying Proper Fan Rotation . . . . . . . . . .75
System Airflow Measurements . . . . . . . .76
Variable Air Volume Systems . . . . . . . . . .77
Exhaust Airflow Measurement (Optional
with all Units) . . . . . . . . . . . . . . . . . . . . . . .78
Tr
aq™ Sensor Airflow Measurement
(Optional with all units equipped with an
economizer) . . . . . . . . . . . . . . . . . . . . . . . .79
Economize
r Damper Adjustment . . . . . . .89
Thermostatic Expansion Valves . . . . . . . . .92
Electric, Steam and Hot Water Start-Up
(Constant Volume & Variable Air Volume
Systems) . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Gas Furnace Start-Up . . . . . . . . . . . . . . . .93
Two Stage Gas Furnace . . . . . . . . . . . . . . .93
Heat Exchanger . . . . . . . . . . . . . . . . . . . . .96
Unit Control . . . . . . . . . . . . . . . . . . . . . . . .96
Limited Modulating Gas Furnace . . . . . . .97
Service & Maintenance . . . . . . . . . . . . . . . . . .99
VFD Programming Parameters . . . . . . . .102
Fan Belt Adjustment . . . . . . . . . . . . . . . .103
Monthly Maintenance . . . . . . . . . . . . . . .111
Wiring Matrix . . . . . . . . . . . . . . . . . . . . . . . . . .114
Warranty and Liability Clause . . . . . . . . . . . .115
Commercial Equipment Rated 20 Tons
and Larger and Related Accessories . . .115
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
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