York ZT SERIES - ZT078-150 Unit Electrical Entry

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6021980-UIM-A-1120

16 Johnson Controls Ducted Systems

Figure 11: ZT078-150 unit electrical entry

Disconnect Swith Cover

Power Entry Ø 2-1/2

Control Entry Ø 7/8

Power Entry Ø 2-1/2

Convenience Outlet Cover

Convenience Outlet

Power Entry Ø 7/8

FRONT

Main Page

Table of Contents1
General2
Installation5
Preceding Installation5
Unit Shipping Bracket5
Barometric Relief Hood - Shipping Location5
Limitations6
Compressor Section6
Component Location Table7
Component Location7
ZT078-150 Unit Limitations8
Location9
Rigging and Handling9
4 Point and 6 Point Load Weight for W Units10
4 Point and 6 Point Load Weight for V Units10
Center of Gravity10
ZT078-150 Standard Unit Weights and Dimensions11
ZT078-150 Unit Weights with the Magna Dry Option11
ZT078-150 Unit Accessory Weights11
ZT078-102 Physical Dimensions12
ZT078-150 Unit Physical Dimensions13
ZT120-150 Physical Dimensions13
ZT078-150 Unit Clearances14
ZT078-150 Unit Bottom Duct Openings15
ZT078-150 Unit Electrical Entry16
ZT078-102 Side Duct Dimensions17
ZT120-150 Side Duct Dimensions17
Left/End Duct Dimensions18
ZT078-150 Unit Left/End Duct Opening18
ZT078-150 Roof Curb18
ZT078-150 Transition Roof Curb19
Ductwork20
Side Panels20
Side Panels with Hole Plugs20
Return down Flow Plenum with Panel20
Discharge Panel in Place20
Condensate Drain21
Compressors21
Side Panels for Economizer Hood Tops21
Filters22
Power and Control Wiring22
Field Wiring Disconnect23
Control Wire Sizes24
Typical Control Wiring24
Electrical Data25
Physical Data33
Optional Electric Heat35
Optional Gas Heat35
Electric Heat Minimum Supply Air35
Side Entry Gas Piping35
Gas Pipe Sizing - Capacity of Pipe36
Gas Heat Minimum Supply Air36
Bottom Entry Gas Piping36
Options and Accessories37
Economizer Sequences39
Simplified VFD Wiring39
Power Exhaust43
Smart Equipment™ Economizer Board44
SE-ECO1001-0 Economizer Controller44
Supply Air Limitations48
Belt Adjustment48
Altitude/Temperature Correction Factors49
Airflow Performance51
Airflow Performance - Side Duct Application51
Airflow Performance - Bottom Duct Application54
RPM Selection56
Indoor Blower Specifications56
Air Balance56
Checking Air Quantity56
Power Exhaust Specifications56
Dry Coil Delta P57
Motor Sheave Datum Diameters58
Operation60
Cooling Operation60
Cooling Operation Errors61
Reheat Mode Sequence of Operation62
25 3 Stage Dehumidification Sequence in Normal and Alternate Mode62
Cooling Operation Piping Schematic - Circuit No. 163
Reheat Operation Piping Schematic - Circuit No. 163
Electric Heating Sequence of Operations64
Electric Heat Operation Errors64
Gas Heating Sequence of Operations64
Ignition Control Board64
Electric Heat Limit Setting64
Electric Heat Anticipator Setpoints64
Gas Heating Operation Errors65
Cooling Start-Up66
Gas Heat Start-Up66
Gas Heat Anticipator Setpoints66
Checking Gas Heat Input67
Gas Rate Cubic Feet Per Hour68
Gas Heat Stages68
Gas Heat Limit Control Settings68
Navigation Components for the Smart Equipment™ Control Board69
Typical Flame69
Typical Two Stage Gas Valve69
Smart Equipment™ Unit Control Board70
Unit Control Board70
Cable for FC Buses and SA Buses in Order of Preference76
Ignition Control Flash Codes76
Charging the Unit77
ZT078 Charging Table - System 177
ZT078 Charging Table - System 277
ZT090 Charging Table - System 178
ZT090 Charging Table - System 278
ZT102 Charging Table - System 179
ZT102 Charging Table - System 279
ZT120 Charging Table - System 180
ZT120 Charging Table - System 280
ZT150 Charging Table - System 181
ZT150 Charging Table - System 281
Start-Up Sheet82

York ZT SERIES - ZT078-150 Unit Electrical Entry

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