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Summary of Contents for Johnson Controls DSH
- Page 1 Model DSH Ceiling Mounted Ducted R-410A Air Conditioning Units New Release Form 145.32-IOM1 (908) CEILING MOUNTED DUCTED R-410A AIR CONDITIONING UNITS INSTALLATION INSTRUCTIONS...
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Page 2: Safety Symbols
READ BEFORE PROCEEDING! GENERAL SAFETY GUIDELINES This equipment is a relatively complicated apparatus. During installation, operation, maintenance or service, individuals may be exposed to certain components or conditions including, but not limited to: refrigerants, oils, materials under pressure, rotating components, and both high and low voltage. -
Page 3: Table Of Contents
CHANGEABILITY OF THIS DOCUMENT In complying with Johnson Controls policy for continu- ous product improvement, the information contained in this document is subject to change without notice. While Johnson Controls makes no commitment to up- date or provide current information automatically to the manual owner, that information, if applicable, can be obtained by contacting the nearest Johnson Controls service office. -
Page 4: General Information
GENERAL INFORMATION Our units are designed to meet the ever-changing (unique) installation requirements of today’s market. The horizontal configuration is unitized for single package or split installation. Low profile design allows the unit to be installed on the floor or suspended from the ceiling. All unit components are securely mounted inside the heavy gauge “Galvalume”... - Page 5 FORM 145.32-IOM1 (908) TYPICAL INSTALLATION DRAWING JOHNSON CONTROLS...
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Page 6: Pre-Installation Inspection Of Equipment
PRE-INSTALLATION INSPECTION OF EQUIPMENT All units are factory tested to ensure safe operation and quality assembly. Units are packaged and sealed on shipping skids and shipped in first class condition. Torn and broken packaging, scratched or dented panels should be reported to carrier immediately. An internal inspection of each unit should be performed prior to installation. -
Page 7: Unit Mounting
UNIT MOUNTING The 2 through 5 ton unit consist of an evaporator and condenser module. These two modules are rigidly at- tached by a joining strip across the top of the two cabinet, and two long side cross-member angles which bridge the mounting channels on the bottom of the unit. -
Page 8: Separation Of Units
SEPARATION OF UNITS The 2 through 5 ton units are provided with refrigerant shut-off valves to allow the evaporator and condenser sections to be field split - without the necessity of re- claiming the entire unit refrigerant charge. The evaporator and condenser sections may be sepa- rated by performing the following procedure: 1. -
Page 9: Dimensional Data
FORM 145.32-IOM1 (908) DIMENSIONAL DATA JOHNSON CONTROLS... - Page 10 FORM 145.32-IOM1 (908) DIMENSIONAL DATA (Cont.) JOHNSON CONTROLS...
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Page 11: Ductwork
DUCTWORK When installing ductwork, adhere to local Codes and sensible practice. Minimize duct runs and avoid abrupt changes in direction where possible. Allow ample access space for servicing of the coils and changing of filters. Perform regular maintenance on ducts to increase unit life, maintain efficient operation, and reduce accumu- lation of explosive dust. -
Page 12: Electrical Wiring
ELECTRICAL WIRING Follow local electrical codes when making electrical connections. Units are completely factory wired for normal supply voltages (ie.208-230, 460, 575/3phase/60Hz) Confirm unit specifications by checking unit data plate. The factory wiring terminates in two boxes, one in each section of the unit. - Page 13 STANDARD MOTORS MODEL VOLTAGE COMPRESSOR AC024H12 208-230/1/60 @ 13.5 AC024H32 208-230/3/60 AC036H12 208-230/1/60 @ 14.1 AC036H32 208-230/3/60 AC036H34 460/3/60 AC036H35 575/3/60 AC048H12 208-230/1/60 @ 19.9 AC048H32 208-230/3/60 @ 13.1 AC048H34 460/3/60 AC048H35 575/3/60 AC060H32 208-230/3/60 @ 16.0 AC060H34 460/3/60 AC060H35 575/3/60 Notes: Data shown for packaged unit installation, with single point power supply.
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Page 14: Motor And Pulley Data
MOTOR AND PULLEY DATA EVAPORATOR - STANDARD BLOWER MOTOR AND DRIVE DATA Motor Drive Range Model (RPM) Frame 2 TON 845-1170 3 TON 675-1010 4 TON 675-1010 5 TON 745-1120 CONDENSER - STANDARD BLOWER MOTOR AND DRIVE DATA Motor Drive Range Model (RPM) Frame... -
Page 15: Start-Up And Operation
START-UP AND OPERATION Prior to starting unit for the first time, turn the thermostat system switch to oFF - or raise the cooling setpoint to the highest temperature, to prevent the unit from starting. Close the electrical disconnect switch. This will energize the compressor crankcase heater(s). - Page 16 FORM 145.32-IOM1 (908) TYPICAL SCHEMATIC JOHNSON CONTROLS...
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Page 17: Maintenance / Service
MAINTENANCE / SERVICE Disconnect And Lock Out Power When Servicing Unit. Failure To Do So May Result In Personal Injury Or Death Due To Electrical Shock. Exercise care when working around the sharp metal edges of door panels or door frames, etc. These edges can cause injury. -
Page 18: Comfort Alert™ Diagnostics
COMFORT ALERT™ DIAGNOSTICS The Comfort Alert diagnostics module is a breakthrough innovation for troubleshooting and protecting three phase Copeland Scroll® compressors. The module installs easily in the electrical box of the condensing unit near the compressor contactor. By monitoring and analyzing data from the Copeland Scroll compressor and the thermostat demand, the module can accurately detect the cause of electrical and system related failures... - Page 19 Status LED Status LED Description Green “POWER” Module has power Red “TRIP” LED Thermostat demand signal Y On Solid is present, but the compressor is not running Red “TRIP” LED The anti-short cycle timer (3 minutes), in module is preventing compressor restart. Flashing Module locks out compressor when compressor damaging ALERT codes appear.
- Page 20 Status LED Status LED Description Yellow “ALERT” Locked Rotor Flash Code 4 LOCKOUT Yellow “ALERT” Open Circuit Flash Code 5 Yellow “ALERT” Missing Phase Flash Code 6 LOCKOUT Yellow “ALERT” Reverse Phase Flash Code 7 LOCKOUT Yellow “ALERT” Welded Contactor Flash Code 8 Compressor always runs Yellow “ALERT”...
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Page 21: Installation Verification
Miswiring the Comfort Alert module will cause false LED codes. Table 1 describes LED opera- tion when the module is miswired and what troubleshooting action is required to correct the problem. TABLE 1 - COMFORT ALERT MODULE TROUBLESHOOTING Installation Verification To verify the installation of Comfort Alert is correct, a functional test can be performed. -
Page 22: Limited Warranty
Johnson Controls warrants this product to be free from defects in workmanship or material for a period of one year from date of original installation or 18 months from date of shipment, whichever comes first. Johnson Controls obligation under this Warranty is LIMITED to repairing or replacing at our sole option, at our factory, any part thereof which shall be returned to our factory, transportation charges prepaid and which on examination proves to have been thus defective under normal domestic use not exceeding the fuel rating. - Page 23 R-410A QUICK REFERENCE GUIDE Refer to Installation Instructions for specific installation requirements. • R-410A Refrigerant operates at 50 - 70 percent higher pressures than R-22. Be sure that servicing equipment and replacement components are designed to operate with R-410A. • R-410A Refrigerant cylinders are rose colored. • Recovery cylinder service pressure rating must be 400 psig. DOT 4BA400 or DOT BW400. •...
- Page 24 Subject to change without notice. Printed in U.S.A. Form 145.32-IOM1 (908) Copyright 2008 by Unitary Products Group. All rights reserved. New Release © Engineered Systems P.O. Box 1592 York Products York, PA Group 17405 17405...
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