Johnson Controls DSH, Installation Instructions Manual

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 ...

Page 2: ... It is essential that prior to performing any task on this equipment this individual shall have read and understood this document and any referenced materials This individual shall also be familiar with and comply with all applicable governmental standards and regulations pertaining to the task in question safety symbols The following symbols are used in this document to alert the reader to areas ...

Page 3: ...bility of these documents then prior to working on the equipment they should verify with the owner whether the equipment has been modified and if current literature is available safety symbols 2 Changeability of this document 3 TABLE OF CONTENTS 3 GENERAL INFORMATION 4 PRE INSTALLATION INSPECTION OF EQUIPMENT 6 RIGGING 6 INSTALLATION 6 UNIT MOUNTING 7 SEPARATION OF UNITS 8 INTERCONNECTING REFRIGER...

Page 4: ...h pressure and low pressure switches Each circuit is con stantly monitored by ComfortAlert module 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 and protect the compressor A flashing LED indicator communicates the ALERT code and guides the service technician more quic...

Page 5: ...FORM 145 32 IOM1 908 5 Johnson Controls TYPICAL INSTALLATION DRAWING ...

Page 6: ...ilure to do so may result in unit damage per sonal injury or even death To ensure safe installation of the unit when ceiling mount application is specified estimate the approximate center of gravity of the unit The configuration of internal com ponents for each unit is different and weight is unevenly distributed Determine the actual center of gravity of the unit by performing a test lift Lifting ...

Page 7: ...se all mounting points indicated regardless if unit is installed as a package or split system See unit dimension drawings Use of 1 2in dia hanger rods is recommended Ensure the attachment point of the rods to the building structure is sufficient to support the unit weight In order to ensure efficient condensate drain age the unit may be pitched towards the evaporator end of the unit Aminimum of 4 ...

Page 8: ...amage the short lengths of refrigerant tubing extending into the condenser section The separated evaporator and condenser modules may now be individually moved to the proposed installation site for re assembly or separately located for split ap plications INTERCONNECTING REFRIGERANT TUBING SPLIT INSTALLATION After the evaporator and condenser sections have been mounted the interconnecting refriger...

Page 9: ...FORM 145 32 IOM1 908 9 Johnson Controls DIMENSIONAL DATA ...

Page 10: ...JOHNSON CONTROLS 10 FORM 145 32 IOM1 908 DIMENSIONAL DATA Cont ...

Page 11: ...e condenser air discharge for 1 200 1 500 feet minute nominal velocity Maximum recommended 1 700 feet minute The use of louvers with higher velocities than above may be employed at the discretion of the engineer installer provided that the total air pressure drop does not exceed the capability of the condenser fan and motor The use of low restriction louvers with shallow blade angles can allow hig...

Page 12: ... unit Unit may start automati cally if power is not disconnected Fail ure to do so may result in personal injury or death due to electrical shock PACKAGED UNIT If unit is to be installed as a complete integral unit the thermostat low voltage wiring is to be brought through connection A while power wiring will be brought through connection C Make sure you check the unit data plate for full specific...

Page 13: ...IC PRESSURE Inches W C MODEL SUPPLY 0 2 0 4 0 6 0 8 1 0 1 2 1 4 1 6 1 8 CFM RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP 700 593 0 06 755 0 10 915 0 13 1048 0 17 1175 0 23 2 TON 800 629 0 08 777 0 12 914 0 16 1169 0 20 1178 0 25 900 668 0 11 804 0 15 930 0 19 1170 0 24 1000 598 0 11 722 0 16 835 0 19 930 0 25 1141 0 32 3 TON 1200 727 0 20 831 0 25 929 0 31 972 0 33 1400 ...

Page 14: ...Pulley Fixed Blower Pulley BLOWER SPEED ADJUSTMENT The RPM of the supply air and condenser air blow ers will depend on the required CFM and the static resistance of both the supply discharge and the return intake duct systems With this information the RPM for the blowers can be determined from the blower performance tables Adjustment of blower speed is accomplished as follows 1 Loosen belt tension...

Page 15: ...ompressors in the re versed direction for a short period of time less than one hour However after several minutes of operation the compressors internal protector will trip Ref Charge 2 TON 3 TON 4 TON 5 TON No of Circuits 1 1 1 1 Per Circuit lb 7 625 8 125 11 188 10 938 ALL MODELS High Low Cut Out PSIG 600 55 Cut In PSIG 450 75 If opposite rotation is needed disconnect and reverse any two leads of...

Page 16: ...JOHNSON CONTROLS 16 FORM 145 32 IOM1 908 TYPICAL SCHEMATIC ...

Page 17: ...k and record the compres sor discharge and suction pressures The compressor running current should also be recorded Amaintenance log of these readings can indicate if the unit is operating within its normal limits Abnormal readings should be investigated and the cause corrected B POUNDS FORCE Belt Cross Section Min Max 4L 1 1 2 2 1 2 A 3 1 2 6 1 2 B 5 1 2 8 BX 8 11 FILTERS 2 TON 3 TON QTY SIZE 2 2...

Page 18: ...s the Flash Code correlates to a particular abnormal condition Detailed descriptions of specific ALERT Flash Codes are shown in two tables attached to this manual TRIP LED Red indicates there is a demand signal from the thermostat but no current to the compressor is detected by the module The TRIP LED typically indi cates the compressor protector is open or may indicate missing supply power to the...

Page 19: ...harge b Evaporator blower is not running c Evaporator coil is frozen d Faulty metering device e Condenser coil is dirty f Liquid line restriction lter drier blocked if present 2 If high pressure switch is open go to Flash Code 2 information 3 Intermittent thermostat demand signal 4 System or control board defective Yellow ALERT Flash Code 3 Short Cycling Compressor is running only brie y LOCKOUT R...

Page 20: ...pressor bearings are seized 1 Condensing unit power disconnect is open 2 Compressor circuit breaker or fuses are open 3 Compressor contactor has failed open 4 High pressure switch is open and requires manual reset 5 Broken supply wires or connector is not making contact 6 Unusually long compressor protector reset time due to extreme ambient temperature 7 Compressor windings are damaged 1 Compresso...

Page 21: ...ation of Comfort Alert is correct a functional test can be performed Force a call for cooling and when the compressor starts to run monitor the yellowALERT LED The LED should remain off during test Disconnect power to the compressor while the call for cooling is still active The red TRIP LED will flash indicating the anti short cycle timer is active If the red LED does not function as described ref...

Page 22: ...involved in replacing the compressor is not covered by this Warranty LABOR AND COST NOT COVERED This Warranty provides only replacement parts or credits and does not provide for or cover any labor shipping handling or other costs for service travel servicing removing or installing any parts EXCLUSIONS This Warranty shall be void if 1 The unit is not installed by a licensed or otherwise qualified o...

Page 23: ...ust be at least 700 psig high side and 180 psig low side with 550 psig retard All hoses must have a service pressure rating of 800 psig Leak detectors must be designed to detect HFC refrigerants Systems must be charged with refrigerant Use a commercial type metering device in the manifold hose R 410A can only be used with POE type oils POE type oils rapidly absorb moisture from the atmosphere Vacu...

Page 24: ...to change without notice Printed in U S A Copyright 2008 by Unitary Products Group All rights reserved Form 145 32 IOM1 908 New Release York PA 17405 P O Box 1592 York PA 17405 Engineered Systems Products Group ...