6
RT-SVX34R-EN
Power Exhaust Control
(Tracking) . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Lead/Lag Control. . . . . . . . . . . . . . . . . . . . . 62
Coil Frost Protection. . . . . . . . . . . . . . . . . . 62
Modulating Hot Gas Reheat Frost
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Drain Pan Condensate Overflow
Switch (Optional) . . . . . . . . . . . . . . . . . . . . 63
VFD Programming Parameters . . . . . . . . 63
Condenser Fan Sequencing
Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Preparing the Unit for Operation . . . . . . . . . . 66
Electrical Phasing . . . . . . . . . . . . . . . . . . . . 66
Voltage Supply and Voltage
Imbalance . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Starting the Unit . . . . . . . . . . . . . . . . . . . . . . . . . 67
Test Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Service Test Switch Location. . . . . . . . . . 68
Verifying Proper Fan Rotation . . . . . . . . . 74
Verifying Proper Air Flow (CFM) - CV
or VFD's . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Exhaust Fan Operation . . . . . . . . . . . . . . . 83
Economizer Damper Adjustment. . . . . . . . . . 84
Economizer (O/A) Dampers . . . . . . . . . . . 84
Models with Ultra-Low Leak
Economizers. . . . . . . . . . . . . . . . . . . . . . . . . 86
Manual Outside Air Damper . . . . . . . . . . 88
Starting the Compressor . . . . . . . . . . . . . . . . . 89
Starting 27.5 to 35 Ton Standard
Efficiency Units . . . . . . . . . . . . . . . . . . . . . . 89
Starting 40 to 50 Ton Standard
Efficiency VAV Units . . . . . . . . . . . . . . . . . 90
Starting 27.5-50 Tons High Efficiency
Units and 40-50 Tons Standard
Efficiency Constant Volume
Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Line Weights . . . . . . . . . . . . . . . . . . . . . . . . 90
Compressor Oil . . . . . . . . . . . . . . . . . . . . . . 91
Scroll Compressor Operational
Noises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Compressor Crankcase
Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Charging by Subcooling . . . . . . . . . . . . . 105
Measuring Subcooling . . . . . . . . . . . . . . 105
Gas Heat Units . . . . . . . . . . . . . . . . . . . . . . . . . 105
Electric Heat Units . . . . . . . . . . . . . . . . . . . . . . 106
Final Unit Checkout . . . . . . . . . . . . . . . . . . . . . 106
For Constant Volume Units . . . . . . . . . . 106
For Variable Air Volume Units. . . . . . . . 106
For Single Zone Variable Air Volume
Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Sequence of Operation . . . . . . . . . . . . . . . . . . . 108
Units Without an Economizer . . . . . . . . 108
Economizer Operation Based on Dry
Bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Economizer Operation Based on
Reference Enthalpy . . . . . . . . . . . . . . . . . 109
Economizer Operation Based on
Comparative Enthalpy . . . . . . . . . . . . . . . 109
Economizers with Traq . . . . . . . . . . . . . . 109
Gas Heat Sequence Of Operation . . . . . . . . 110
Electric Heat Sequence Of
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Constant Volume (CV) . . . . . . . . . . . . . . . 111
Variable Air Volume (VAV) . . . . . . . . . . . 112
Variable Air Volume Applications (Single
Zone VAV) Sequence of Operation . . . . . . . 112
Occupied Cooling Operation . . . . . . . . . 112
Economizer Cooling . . . . . . . . . . . . . . . . . 112
Compressor Cooling . . . . . . . . . . . . . . . . 112
Occupied Heating Operation . . . . . . . . . 113
Staged Heating Operation . . . . . . . . . . . 113
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Содержание Voyager Commercial
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