Johnson Controls ZJ Series - Field Wiring Disconnect - Cooling Unit with Gas Heat Without VFD Option

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5803635-YIM-A-0220

Johnson Controls Ducted Systems 19

Figure 23: Field Wiring Disconnect - Cooling Unit With Gas Heat Without VFD Option

THREE

PHASE

POWER

SUPPLY

FACTORY OR FIELD

SUPPLIED DISCONNECT

GROUND

LUG

CONTACTOR 1M

Main Page

Table of Contents1
General2
Installation5
Preceding Installation5
Limitations5
Unit Shipping Bracket5
Condenser Covering5
Compressor Section5
Component Location (ZJ120 Shown)6
Location7
Rigging and Handling7
ZJ078-150 Unit Limitations7
Weights and Dimensions8
Unit 4 Point Load Weight8
Unit 6 Point Load Weight8
Center of Gravity8
ZJ078-150 Unit Accessory Weights9
ZJ078-120 Physical Dimensions9
ZJ150 Physical Dimensions10
ZJ078-150 Unit Physical Dimensions11
ZJ078-150 Unit Clearances11
ZJ078-150 Unit Bottom Duct Openings12
ZJ078-150 Unit Electrical Entry13
ZJ078-120 Unit Side Duct Openings13
Side Duct Dimensions14
ZJ150 Unit Side Duct Openings14
ZJ078-150 Unit Left/End Duct Opening14
Left/End Duct Dimensions15
ZJ078-150 Roof Curb15
ZJ078-150 Transition Roof Curb15
Ductwork16
Side Panels16
Condensate Drain16
Side Panels with Hole Plugs16
Return down Flow Plenum with Panel16
Discharge Panel in Place16
Save Side Panels for Economizer Hood Tops16
Compressors17
Filters17
Power and Control Wiring17
Condensate Drain17
Field Wiring Disconnect - Cooling Unit With/Without Electric Heat and All Units with VFD Option18
Field Wiring Disconnect - Cooling Unit with Gas Heat Without VFD Option19
Control Wire Sizes20
Typical Electronic Thermostat Field Wiring20
Electrical Data21
Physical Data29
Optional Electric Heat31
Optional Gas Heat31
Electric Heat Minimum Supply Air31
Side Entry Gas Piping31
Gas Pipe Sizing - Capacity of Pipe32
Gas Heat Minimum Supply Air32
Bottom Entry Gas Piping32
Options/Accessories33
Optional Variable Air Volume (VAV)34
Optional Hot Gas Bypass (HGBP)36
Economizer Sequences36
Dry Bulb Changeover36
Single Enthalpy Changeover36
Dual Enthalpy Changeover36
Auto36
Simplified VFD Wiring36
Free Cooling Operation37
Power Exhaust37
Smart Equipment™ Economizer Board Details38
SE-ECO1001-0 Economizer Controller38
Supply Air Limitations41
Belt Adjustment42
Altitude/Temperature Correction Factors43
Airflow Performance45
Airflow Performance - Side Duct Application45
Airflow Performance - Bottom Duct Application47
RPM Selection48
Air Balance49
Checking Air Quantity49
Indoor Blower Specifications49
Power Exhaust Specifications49
Dry Coil Delta P50
Motor Sheave Datum Diameters51
Operation52
Cooling Sequence of Operation52
Additional Static Resistance52
Cooling Operation Errors54
Electric Heating Sequence of Operations55
Electric Heat Operation Errors55
Electric Heat Limit Setting55
Gas Heating Sequence of Operations56
Gas Heating Operation Errors56
Electric Heat Anticipator Setpoints56
Gas Heat Limit Control Settings57
Start-Up (Cooling)58
Start-Up (Gas Heat)58
Gas Heat Anticipator Setpoints58
Checking Gas Heat Input59
Gas Rate Cubic Feet Per Hour59
Charging the Unit60
Gas Heat Stages60
Typical Flame60
Typical Gas Valve60
Control Board Navigation Components61
Unit Control Board61
Smart Equipment™ UCB Details62
Cable for FC Buses and SA Buses in Order of Preference . 67 32 Ignition Control Flash Codes67
Start-Up Sheet68

Johnson Controls ZJ Series - Field Wiring Disconnect - Cooling Unit with Gas Heat Without VFD Option

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