Johnson Controls DW-03

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Subject to change without notice. Printed in U.S.A. 362247-BIM-B-0109

Johnson Controls Unitary Products

5005 York Drive

Norman, OK 73069

Main Page

Table of Contents2
General4
Safety Considerations4
Inspection4
Reference5
Renewal Parts5
Approvals5
Product Nomenclature6
Installation7
Installation Safety Information7
Limitations7
Location8
Rigging and Handling8
Clearances8
Unit Application Data (Dw)8
Ductwork9
Condensate Drain9
Compressors9
Filters9
Recommended Drain Piping9
Compressor Restraining Bracket9
Service Access10
Typical Field Power & Control Wiring11
Thermostat12
Power and Control Wiring12
Options/Accessories12
Electric Heat12
Control Wire Sizes12
Gas Heat13
Electric Heater Cfm Limitations13
Gas Heat Application Data13
Table13
Gas Piping14
Gas Connection14
Shut-Off14
Gas Pipe Sizing14
L.p. Units, Tanks and Piping15
External Supply Connection External15
Bottom Supply Connection External15
Vent and Combustion Air Hoods16
Economizer/Motorized Damper and Rain Hood16
Power Exhaust/Barometric Relief Damper and Rain Hood16
Vent and Combustion Air Hood16
Economizer and Power Exhaust Damper Set Point Adjustments and Information17
Minimum Position Adjustment17
Enthalpy Set Point Adjustment17
Power Exhaust Damper Setpoint (with or Without Power Exhaust)17
Indoor Air Quality17
Enthalpy Setpoint Adjustment18
Honeywell Economizer Control W721218
Center of Gravity (All Models)19
Dw 4 and 6 Point Loads Weight Distribution19
Dw Physical Data20
Dw Operating Weights (Lbs.)20
Electrical Data - Dw-03, -04 & -05 Direct Drive W/O Powered Convenience Outlet21
Electrical Data - Dw-03, -04 & -05 Belt Drive W/O Powered Convenience Outlet23
Electrical Data - Dw-03, -04 & -05 Belt Drive High Static W/O Powered Convenience Outlet25
Electrical Data - Dw-03, -04 & -05 Direct Drive W/Powered Convenience Outlet27
Electrical Data - Dw-03, -04 & -05 Belt Drive with Powered Convenience Outlet29
Electrical Data - Dw-03, -04 & -05 Belt Drive High Static with Powered Convenience Outlet31
Unit Dimensions33
Electric Heat Correction Factors33
Voltage Limitations33
Unit Dimensions (3 - 5 Ton Cooling/Gas Heat)34
Unit with Economizer Rainhood34
Unit with Fixed Outdoor Air/Motorized Damper Rainhood35
Unit Dimensions (Rear View)35
Utilities Entry36
Minimum Clearances36
Disconnect/Blower Access Location36
Supply Air Blower Performance (Dw-03 Belt Drive) - Side Duct Application37
Supply Air Blower Performance (Dw-03 Belt Drive) - Bottom Duct Application37
Supply Air Blower Performance (Dw-04 Belt Drive) - Side Duct Application37
Supply Air Blower Performance (Dw-04 Belt Drive) - Bottom Duct Application38
Supply Air Blower Performance (Dw-05 Belt Drive) - Side Duct Application38
Supply Air Blower Performance (Dw-05 Belt Drive) - Bottom Duct Application38
Supply Air Blower Performance (Dw-03, -04, & -05 Direct Drive) Side Duct39
Supply Air Blower Performance (Dw-03, -04, & -05 Direct Drive) Bottom Duct39
Belt Drive Rpm Selection39
Belt Drive Blower Motor and Drive Data40
Static Resistances40
Table40
Phasing42
Supply Air Blowers42
Checking Supply Air Cfm42
Belt Adjustment42
Operation43
Sequence of Operations Overview43
Pressure Drop Across Coil43
Cooling Sequence of Operation44
Continuous Blower44
Intermittent Blower44
No Outdoor Air Options44
Economizer with Single Enthalpy Sensor44
Economizer with Dual Enthalpy Sensors44
Economizer (Single or Dual) with Power Exhaust44
Motorized Outdoor Air Dampers44
Cooling Operation Errors44
High-Pressure Limit Switch44
Freezestat45
Low Ambient Cooling45
Safety Controls45
Compressor Protection45
Flash Codes45
Reset45
Electric Heating Sequence of Operations46
Safety Controls46
Reset46
Heat Anticipator Setpoints46
Electric Heat Limit Control Setting46
Gas Heating Sequence of Operation47
Two Stage Furnace Only47
Gas Heat Operation Errors47
Gas Valve Piping47
Electric Heat Anticipator Setpoints47
Temperature Limits48
Gas Valve48
Centrifugal Switch48
Rollout Switch48
Flame Sense Circuit48
Shut-Off48
Flash Codes49
Resets49
Heat Anticipator Setpoints49
Start-Up (Cooling)49
Prestart Check List49
Operating Instructions49
Post Start Check List49
Shut down49
Single Stage Gas Heat Limit Control49
Gas Heat Anticipator Setpoints49
Start-Up (Gas Heat)50
Pre-Start Check List50
Operating Instructions50
To Light Pilot and Main Burners50
To Shut down50
Post-Start Check List (Gas)50
Typical Single Stage Gas Valves50
Manifold Gas Pressure Adjustment51
Pilot Checkout51
Burner Instructions51
Typical 2 Stage Gas Valves51
Proper Flame Adjustment51
Burner Air Shutter Adjustment52
Checking Gas Input52
Natural Gas52
Adjustment of Temperature Rise52
Typical Flame Appearance52
Gas Rate - Cubic Feet Per Hour52
Troubleshooting53
Cooling Troubleshooting Guide53
Charging the Unit55
Normal Operating Pressures56
Gas Heat Troubleshooting Guide57
Flash Code Troubleshooting58
Ignition Control Board58
Centrifugal Switch58
Pilot Flame Lockout59
Primary or aux Temperature Limit59
Rollout Switch59
Unexpected Flame Presence60
Gas Valve Stuck off or on60
Flame Sense Circuit Failure60
Symptomatic Troubleshooting60
Unit Flash Codes62
Fan on and off Delays62
Unit Control Board63
Ignition Control Board Flash Codes63

Johnson Controls DW-03 - Page 64

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