York MILLENNIUM Y24 - Power Exhaust - Two Forward Curved Fans - 30 & 40 Tons; Power Exhaust

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102777-YIM-E-0206

62 Unitary Products Group

FIGURE 25 - POWER EXHAUST - TWO FORWARD CURVED FANS - 30 & 40 TONS

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Table of Contents2
Nomenclature6
Component Location7
General8
Safety Considerations8
Notes, Cautions and Warnings8
Gas Fired Models8
What to Do if You Smell Gas8
All Models8
Inspection8
Reference9
Approvals9
Installation9
Limitations9
Location9
Cooling & Electrical Application9
Cooling & Elec. App. Limitations9
Typical Rigging10
Gas Application Data10
Center of Gravity11
Unit Weights11
Supply Fan Motor Vfd Weights11
Exhaust Fan Motor Vfd Weights11
Rigging and Handling12
Clearances12
Unit Cornerweight12
Unit Center of Gravity12
Ductwork13
Air Hoods for Fixed Outside Air (Units Without Economizer)13
Air Hoods for Economizer13
Air Hoods for Exhaust Air13
Condensate Drain13
Service Access14
Compressors14
Filters14
Thermostat (Constant Volume Units)14
Space Sensor (Variable Air Volume Units)14
Recommended Drain Piping14
Typical Thermostat Wiring14
Control Wire Sizes14
Power and Control Wiring15
Power Wiring Detail15
Erv15
Gas Heating16
Gas Piping16
Gas Connection16
Typical Gas Piping Connection16
Pipe Sizes16
Vent and Combustion Air17
233 & 466 Mbh Heat17
Vent and Combustion Air Hoods17
699 Mbh Heat Vent17
Flue Extension17
Electric Heat18
Hot Water Heat18
Clearances18
Piping Connections19
Steam Heat19
Hot Water Piping Cross-Section19
Steam Piping Cross-Section19
Piping Connections20
Static Pressure Control Plastic Tubing20
Exhaust Static Pressure20
Electrical Data Basic Unit - 25 Ton22
Electrical Data Basic Unit - 30 Ton23
Electrical Data Basic Unit - 40 Ton23
Electrical Data Basic Unit with Electric Heat - 25 Ton24
Electrical Data Basic Unit with Electric Heat - 30 Ton25
Electrical Data Basic Unit with Electric Heat - 40 Ton26
Electrical Data Basic Unit with Power Exhaust - 25 Ton27
Electrical Data Basic Unit with Power Exhaust - 30 Ton28
Electrical Data Basic Unit with Power Exhaust - 40 Ton29
Electrical Data Basic Unit W/ Power Exhaust & Electric Heat - 25 Ton30
Electrical Data Basic Unit W/ Power Exhaust & Electric Heat - 30 Ton33
Electrical Data Basic Unit W/ Power Exhaust & Electric Heat - 40 Ton36
Bottom Supply and Return39
End Return, Bottom Supply40
Bottom Return, Front & Rear Supply41
End Return, Front & Rear Supply42
Field Installed Disconnect43
Partial Roof Curb Model 1Rc0455P44
Full Roof Curb Model 1Rc0455F45
Cfm, Static Pressure, and Power - Altitude and Temperature Corrections46
Altitude/Temperature Conversion Factor 47 21 Fan Performance - 25 Ton50
Fan Performance - 25 Ton50
Fan Performance - 30 Ton53
Fan Performance - 40 Ton56
Supply Fan Motor and Drive Data58
Power Exhaust - One Forward Curved Fan59
Power Exhaust - One Forward Curve Fan60
Tons60
Power Exhaust - Two Forward Curved Fans - 30 & 40 Tons62
Power Exhaust - Two Forward Curved62
Start-Up63
Compressor Rotation63
Supply Air Fan Instructions63
Check Blower Bearing Set Screws63
Checking Supply Air Cfm63
Fan Rotation63
Belt Tension63
Air Balance63
Checking Air Quantity63
Belt Tension Adjustment63
Supply Air Drive Adjustment65
System Setpoints65
Constant Volume and Variable Air Volume65
Drive Adjustment for Power Exhaust67
Gas Furnace Operating Instructions68
To Light the Main Burners68
To Shut down68
Post-Start Checklist (Gas)68
Manifold Gas Pressure Adjustment68
Drive Adjustment for Power Exhaust68
Burner Instructions69
Adjustment of Temperature Rise69
Checking Gas Input69
Natural Gas69
Typical Gas Valve69
Electric Heating70
Cooling Operating Instructions70
Compressor70
Internal Wiring70
Condenser Fans70
Millennium Sequence of Operation70
Overview70
Typical Flame Appearance70
Run Sequence71
Unit Controls Sequence71
Cooling Stage71
Schedule71
Variable Air Volume Unit (Vfd & Igv)73
Overview73
Occupied / Unoccupied / Morning Warm-Up73
Occupied73
Unoccupied73
Morning Warm-Up [Mwup]74
Unit Controls74
Head Pressure Control77
Description77
Sequence of Operation - for Head Pressure Control77
Intelli-Start77
Lead Lag77
Devices and Rules77
Air Proving Switch78
Fan Delays78
Comfort Ventilation Mode78
Comfort Ventilation Economizer Control78
Economizer Control During Comfort Ventilation79
Staging Control During Comfort Ventilation79
Hydronic Heat80
Cooling Lockout on Oat80
Water Coil Freeze Stat (Fsi)80
CV Operation80
Thermostat Operation for Cooling with Y1, Y2, Y3 and Y4 Inputs80
Grouping Compressors into Stages81
Economizer Mode81
Operation for Heating with W1, W2, and W381
Inputs81
Supply Fan off Delay81
Heat Stage Delays81
Thermostat Operation with Hydronic Heat81
Sensor Operation81
Types of Space Sensors81
Supply Fan Control When Using a Zone Sensor82
Supply Fan off Delay82
Control of Compressors When Using a Zone Sensor82
Heating Operation with the Sensor Option82
Cooling Operation with the Sensor Option82
Vav Operation83
Vav Operation with a Thermostat83
Vav Operation with a Zone Sensor83
Standalone Vav Operation83
Supply Fan off Delay83
Occupied Heating with a Thermostat83
Unoccupied Heating with a Thermostat84
Occupied Cooling with a Thermostat84
Unoccupied Cooling with a Thermostat84
Occupied Heating with a Space Sensor84
Unoccupied Heating with a Space Sensor84
Occupied Cooling with a Space Sensor84
Unoccupied Cooling with a Space Sensor84
Unoccupied Heating in Standalone Operation85
Occupied Cooling in Standalone Operation85
Supply Duct Pressure Control Algorithm85
Morning Warm up / Vav Occupied Heating Control Algorithm85
Starting Morning Warm up85
Morning Warm up / Vav Occupied Heating Function85
Sat Control Band85
Unoccupied Vav Heating / Cooling Control Algorithm with a Space Sensor86
Occupied Vav Heating / Cooling Control Algorithm with a Space Sensor86
Holiday Schedule86
Controlling Excessive Sat (Supply Air Temperature)87
Sat Control Configuration87
Sat Control for Cooling87
Economizer Loading Operation During an Excessive Sat for Cooling87
CV Economizer Operation87
Sat Setpoints Used During Cooling with Economizer Operation87
Demand Ventilation90
Exhaust Operation91
Two-Position Control (Non Modulating Power Exhaust)91
Proportional Control (Fan with Modulating Exhaust Air Damper (Ead) Controlled from Building Static Pressure)91
Proportional Control with Vfd Fan92
Two-Position Control (Power Exhaust with Barometric Relief, Controlled from Building Static Pressure)92
Erv92
Scheduling Operation92
Compressor Status Monitoring92
Troubleshooting a Millennium Simplicity Control95
Status Led Chart95
Failure Modes and Default Operation95
Error Histories95
Sensor Failures and Default Operation95
Sat Sensor95
Rat Sensor95
Oat Sensor95
Outside Air Relative Humidity Sensor95
Return Air Relative Humidity Sensor95
Space Temperature Sensor96
Building Pressure Sensor96
Duct Static Pressure Sensor96
Iaq Sensor96
System Errors96
Heating Sat Failure96
Cooling Sat Failure96
Supply Fan Failure96
Compressor Safety Chain Trip96
Dirty Filter Alarm96
Diagnostics Via Led97
Error History97
Simplicity Controller97
Simplicity Controls Push Buttons97
Digital Lingo98
The Pi Algorithm98
Analog to Digital Converter98
Software Terminology98
Communications Bus99
Optional Modlinc Translator99
Overview99
Component Description99
The Simplicity Controller99
Wiring and Termination, Communications100
Communication Address100
Acronyms100
Inputs100
Analog Inputs (Ai)101
Binary Inputs (Bi)102
Outputs102
Vfd Control Wiring102
Input Signal to Y1 Actuator Position102
Binary Outputs (Bo)103
H1-3 - Heat Stages 1 to 3 [Optional]103
Simplicity Control Inputs103
Simplicity Control Outputs105
Simplicity Programming Options106
Interacting through the Millennium Simplicity106
Set the Clock106
Parameter Setting106
Initial Startup Options106
Metric Operation (English)106
Settable System Parameters106
Sequence of Setting the Set Points109
Settable System Parameters112
Service114
Refrigeration System114
Compressors114
Motors114
Indoor Blower Motors114
Power Exhaust or Return Air Fan Motors114
Condenser Fan Motors114
Draft Motor (Gas Furnace)114
Ton115
Static Resistance Steam Coil115
Hot Water Coil (1 Row, 40 Ton)116
Water Pressure Drop116
30 Ton)116
Ton117
(25 & 30 Ton)117
Water Pressure Drop117
Static Resistance Hot Water Coil117
(40 Ton)117
Hot Water Coil - 25 & 30 Ton, 1 Row, at 10 Gpm118
Hot Water Coil - 25 & 30 Ton, 1 Row, at 20 Gpm118
Hot Water Coil - 25 & 30 Ton, 1 Row, at 30 Gpm119
Hot Water Coil - 25 & 30 Ton, 1 Row, at 40 Gpm119
Hot Water Coil - 25 & 30 Ton, 2 Row, at 60 Gpm120
Pg. # 41 HOT WATER COIL - 25 & 30 TON, 2 ROW, at 80 GPM120
Hot Water Coil - 40 Ton, 1 Row, at 10 Gpm121
Hot Water Coil - 40 Ton, 1 Row, at 20 Gpm121
Hot Water Coil - 40 Ton, 1 Row, at 30 Gpm122
Hot Water Coil - 40 Ton, 1 Row, at 40 Gpm122
Hot Water Coil - 40 Ton, 2 Row, at 20 Gpm123
Hot Water Coil - 40 Ton, 2 Row, at 40 Gpm123
Hot Water Coil - 40 Ton, 2 Row, at 60 Gpm124
Hot Water Coil - 40 Ton, 2 Row, at 80 Gpm . 124 50 Steam Coil - 25 & 30 Ton (1 Row)125
Steam Coil - 40 Ton (1 Row)125
Typical Control Wiring126
Legend127
Typical 25 Ton Power Wiring128
Typical 30/40 Ton Power Wiring129
Typical Gas Heat Wiring130
Gas Furnace Safety Features131
Combustion Air Proving131
Rollout131
Maintenance131
Normal Maintenance131
Filters131
Motors131
Fan Drives132
Outdoor Coil132
Gas Burner132
To Clean Burners132
Combustion Air Discharge132
Cleaning Flue Passages and Heating Elements132
Indoor Blower Bearing Lubrication132
Secure Owners Approval133
Typical Flue Baffle133
25 Ton Charging Curve134
30 Ton Charging Curve135
40 Ton Charging Curve136
Pressure Drop Dry Evaporator Coil Vs Supply Air Cfm - 25 Ton137
Pressure Drop Dry Evaporator Coil Vs Supply Air Cfm - 30 & 40 Ton138

York MILLENNIUM Y24 - Power Exhaust - Two Forward Curved Fans - 30 & 40 Tons; Power Exhaust - Two Forward Curved

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