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Model DSH
Ceiling Mounted Ducted R-410A
New Release Air Conditioning Units Form 145.32-IOM1 (908)
CEILING MOUNTED DUCTED R-410A
AIR CONDITIONING UNITS
INSTALLATION INSTRUCTIONS
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FORM 145.32-IOM1 (908) IMPORTANT! READ BEFORE PROCEEDING! GENERAL SAFETY GUIDELINES This equipment is a relatively complicated apparatus. which it is situated, as well as severe personal injury or During installation, operation, maintenance or service, death to themselves and people at the site. individuals may be exposed to certain components or conditions including, but not limited to: refrigerants, oils, This document is intended for use by owner-authorized materials under pressure, rotat
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FORM 145.32-IOM1 (908) CHANGEABILITY OF THIS DOCUMENT In complying with Johnson Controls policy for continu- It is the responsibility of operating/service personnel as ous product improvement, the information contained to the applicability of these documents to the equipment in this document is subject to change without notice. in question. If there is any question in the mind of oper- While Johnson Controls makes no commitment to up- ating/service personnel as to the applicability of these d
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FORM 145.32-IOM1 (908) GENERAL INFORMATION Our units are designed to meet the ever-changing Service access doors are equipped with handles and (unique) installation requirements of today’s market. The are located on all sides of the unit to allow easy servic- horizontal configuration is unitized for single package ing of all components. Service access doors are factory or split installation. Low profile design allows the unit to shipped with knock-outs allowing gauge lines to be be installed
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FORM 145.32-IOM1 (908) TYPICAL INSTALLATION DRAWING 5 JOHNSON CONTROLS
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FORM 145.32-IOM1 (908) PRE-INSTALLATION INSPECTION OF EQUIPMENT INSTALLATION Lock all electrical power supply switch- All units are factory tested to ensure safe operation es in the off position before installing and quality assembly. Units are packaged and sealed the unit. Failure to disconnect power on shipping skids and shipped in first class condition. supply may result in electrical shock or Torn and broken packaging, scratched or dented panels even death. should be reported to car
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FORM 145.32-IOM1 (908) UNIT MOUNTING A minimum of 4-in. clearance is required under the unit to The 2 through 5 ton unit consist of an evaporator and allow for trapping of the evaporator condensate drain. condenser module. These two modules are rigidly at- tached by a joining strip across the top of the two cabinet, Floor mounted units should be secured on a solid, level and two long side cross-member angles which bridge the pad. The use of isolating vibro-pads at several points mounting
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FORM 145.32-IOM1 (908) SEPARATION OF UNITS INTERCONNECTING REFRIGERANT TUBING - SPLIT INSTALLATION The 2 through 5 ton units are provided with refrigerant shut-off valves to allow the evaporator and condenser After the evaporator and condenser sections have been sections to be field split - without the necessity of re- mounted, the interconnecting refrigerant tubing can be claiming the entire unit refrigerant charge. fabricated. Line sizing recommendations shown in the accompanying table
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FORM 145.32-IOM1 (908) DIMENSIONAL DATA 9 JOHNSON CONTROLS
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FORM 145.32-IOM1 (908) DIMENSIONAL DATA (Cont.) 10 JOHNSON CONTROLS
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FORM 145.32-IOM1 (908) DUCTWORK The use of louvers with higher velocities than above may When installing ductwork, adhere to local Codes and be employed, at the discretion of the engineer/installer, sensible practice. Minimize duct runs and avoid abrupt provided that the total air pressure drop does not exceed changes in direction where possible. Allow ample access the capability of the condenser fan and motor. The use space for servicing of the coils and changing of filters. of low res
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FORM 145.32-IOM1 (908) ELECTRICAL WIRING PACKAGED UNIT If unit is to be installed as a complete integral unit, the Follow local electrical codes when making electrical thermostat (low voltage) wiring is to be brought through connections. Units are completely factory wired for normal connection “A”, while power wiring will be brought supply voltages (ie.208-230, 460, 575/3phase/60Hz) through connection “C”). Make sure you check the unit Confirm unit specifications by checking unit data pl
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FORM 145.32-IOM1 (908) STANDARD MOTORS MODEL VOLTAGE COMPRESSOR EVAPORATOR FAN CONDENSER FAN MIN. CCT. "MOP" Max Overcurrent # QTY RLA LRA HP FLA HP FLA AMPACITY Prot. DSH AC024H12 208-230/1/60 1 @ 13.5 58.3 0.25 2.6 0.50 4.5 23.98 35 DSH AC024H32 208-230/3/60 1 @ 8.6 55.0 0.25 1.4 0.50 2.2 14.35 20 DSH AC036H12 208-230/1/60 1 @ 14.1 77.0 0.33 3.3 0.75 5.5 26.43 40 DSH AC036H32 208-230/3/60 1 @ 9.0 71.0 0.33 1.6 0.75 2.6 15.45 20 DSH AC036H34 460/3/60 1 @ 5.6 38.0 0.33 0.8 0.75 1.3 9.10 15 AC0
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FORM 145.32-IOM1 (908) MOTOR AND PULLEY DATA EVAPORATOR - STANDARD BLOWER MOTOR AND DRIVE DATA Adjustable Fixed Motor Belts Drive Range Motor Pulley Blower Pulley Model (RPM) Pitch Dia.(in) Browning # Pitch Dia.(in) Browning# Rating / Size HP Frame Eff.(%) Qty 2 TON 845-1170 1/4 56 66.0 2.6-3.6 1VP40 X 5/8 5.4 AK56H 4L370 1 3 TON 675-1010 1/3 56 75.0 2.0-3.0 1VP34 X 5/8 5.2 AK54H 4L370 1 4 TON 675-1010 3/4 56 75.0 2.0-3.0 1VP34 X 5/8 5.2 AK54H 4L400 1 5 TON 745-1120 1 143 75.0 2.0-3.0 1VP34 X 7/
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FORM 145.32-IOM1 (908) START-UP AND OPERATION Prior to starting unit for the first time, If opposite rotation is needed, disconnect and reverse turn the thermostat system switch to any two leads of the three phase supply. Reconnect o FF - or raise the cooling setpoint to power and observe for correct rotation. the highest temperature, to prevent the unit from starting. Close the electrical Observe unit operation and check for unusual noise or disconnect switch. This will energize the v
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FORM 145.32-IOM1 (908) TYPICAL SCHEMATIC 16 JOHNSON CONTROLS
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FORM 145.32-IOM1 (908) MAINTENANCE / SERVICE DRIVE BELTS Examine belts periodically for wear. Glazed areas on the Disconnect And Lock Out Power When drive surfaces indicate overheating due to belt slippage. Servicing Unit. Failure To Do So May Ideal tension is the lowest tension at which the belt will Result In Personal Injury Or Death Due not slip under peak load conditions. Over-tensioning To Electrical Shock. shortens belt and bearing life. The tension on the belt should be adjusted
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FORM 145.32-IOM1 (908) 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 and protect t
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FORM 145.32-IOM1 (908) Status LED Status LED Description Status LED Troubleshooting Information Green “POWER” Module has power Supply voltage is present at module terminals Red “TRIP” LED Thermostat demand signal Y 1. Compressor protector is open On Solid is present, but the compressor is not running 2. Condensing unit power disconnect is open 3. Compressor circuit breaker or fuse(s) is open 4. Broken supply wires or connector is not makin
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FORM 145.32-IOM1 (908) Status LED Status LED Description Status LED Troubleshooting Information 1. Low line voltage to compressor Yellow “ALERT” Locked Rotor 2. Excessive liquid refrigerant in compressor Flash Code 4 LOCKOUT 3. Compressor bearings are seized Yellow “ALERT” Open Circuit 1. Condensing unit power disconnect is open Flash Code 5 2. Compressor circuit breaker or fuses are open 3. Compressor contactor has failed open 4. High pressure switch is open and requires manual reset
