Aec ACOA Series Air-Cooled Central Chillers Manuel d'utilisateur

Operation and Installation Manual $30.00 ACOA Series Air-Cooled Central Chillers Important! Read Carefully before Attempting to Install or Ope

Figure 1 ACOA Specifications Total Compressor(s) Evaporator Air-cooled condenser Model refrig- erant charge Displace-ment OilchgSteps of

Figure 2 ACOA15, ACOA20, and ACOA25 Outline Drawing ACOAMODELEVAP.MODEL'A''B'WATERCONNECTION152025CHS00560CHS00660CHS00760'C

Figure 3 ACOA30 and ACOA35 Outline Drawing ACOAMODELEVAPMODEL`A'B'WATERCONNECTION30 CHS00760'C'23-15/16" 80-1/16"10-15/

Figure 4 ACOA45 Outline Drawing ACOAMODELEVAP.MODELWATERCONNECTION45CHD010604" N.P.T.CONTROL BOX73"79"BOXCONTROL POWERAIR FLOWAIR FLOW

Figure 5 ACOA55 Outline Drawing ACOAMODELEVAP.MODELWATERCONNECTION55 CHD01160 4" N.P.T.CONTROL BOX73"79"BOXCONTROL POWERAIR FLOWAIR FL

Figure 6 ACOA70 Outline Drawing ACOAMODEL70EVAP.MODELCHD01260WATERCONNECTION4" N.P.T.CONTROL BOX73"79"BOXCONTROL POWER ENTRY AIR FLOW8

Figure 7 ACOA80 Outline Drawing ACOA80MODELMODELEVAP.CHD01360 4" NPTCONNECTIONWATER175"98"16"LIFTING HOLEMOUNTINGLOCATIONCONTROL

Figure 8 ACOA90 and ACOA100 Outline Drawing 5" VICTAULICWATERCONNECTIONEXT14092EVAP.MODEL090 & 100MODELACO86"CONTROL BOX83-3/8"77-

Figure 9 ACOA110 Outline Drawing MODEL110ACO EVAP.MODELEXF14102WATERCONNECTION5" VICTAULIC86"CONTROL BOX83-3/8"77-3/8"16-3/8"

Figure 10 ACOA125 and ACOA135 Outline Drawing ACOMODEL125MODELEVAP.EXF14102 147-3/4" 238-3/8"ADIMENSIONSBCONNECTIONWATER5" VICTAULICC1

2 Shipping Information 2-1 Unpacking and Inspection You should inspect your AEC/Application Automation ACOA Series air-cooled central chiller for po

You should have: ACOA Series central chiller. Bill of Lading. Packing list. Operating and Installation packet. Electrical schematic and pan

3 Installation 3-1 Installation Location Considerations • Consult a structural engineer to assure that the floor, mounting pad, or structural stee

3-3 Galvanic Corrosion Considerations Water circuit piping components are primarily ferrous (iron) and react electro-chemically with non-ferrous meta

3-7 Making Electrical Connections Check the serial tag voltage and amperage requirements and make sure your electrical service conforms. Bring prope

- Notes - Page 24 ACOA Series Air-Cooled Central Chillers

4 Sequence of Operation 4-1 General Information The operating thermostat (opstat) labeled 4TAS monitors return chilled water/air temperature and act

2. Run Cycle Sequence (Increasing Load) • Customer contacts close Step 1 1. Opstat 4TAS-1 closes as return chilled water temperature starts to ris

9. Compressor 1 unload solenoid 3SOL re-energizes through 4TAS-2 and 4. 10. Compressor 1 unloads one bank of cylinders. 11. Circuit 2 oil and sucti

Step 1 4. Opstat 4TAS-1 opens as water temperature reaches minimum set point. Liquid line solenoid 1SOL de-energizes and Circuit 1 refrigerant flow s

Performance figures stated in this manual are based on a standard atmosphere of 59°F (15°C) at 29.92” Hg (1,014 millibar

Typical ACOA Wiring Diagram 1HTR2HTRHTRHTRSTEP 1STEP 2STEP 3STEP 4TRWNC4NC3NO4C4CONTROL CIRCUIT 115/1/603PS-1910 112019181PS-2 3PS-29PS-1124PS-18CR14

Figure 13 Typical ACOA Option Wiring Details ~~3M200-230/460V1CPR711SCRL1M1123GND72701FM24VAC4A665T6465VARIABLE SPEEDFAN MOTORFAN MOTORVARIABLE SPEED

Figure 14 One Circuit ACOA Refrigerant Piping Schematic COND(HORIZ)MUFFLERANGLEVALVECOMP 1VALVEANGLEVALVEANGLEEVAPORATORWATERWATERINOUTSOLENOIDVALVEH

Figure 16 Three Circuit ACOA Refrigerant Piping Schematic SC OUTSC INMUFFLER 2COMP 2EVAPORATORINWATERWATEROUTDRIERFILTERVALVESANGLESC INSC OUT CO

5 Startup and Operation 5-1 Introduction Important! AEC, Inc. includes factory startup for ACOA chillers. • New chillers are started up by AEC, In

Calibrated refrigerant gauges have been connected to the suction, discharge and oil pressure ports. The optional or field installed chilled water

9. Set the controller to the entering temperature you want. Check the temperature of the process water in and out to be sure the unit is operating wi

Figure 18 ACOA Evaporator Pressure Drop Curves Chiller Curve Minimum flow rate Maximum flow rate model number gpm lpm gpm lpm ACOA15 1 27

5-6 Capacity Control The standard AEC/Application Engineering ACOA chiller capacity control operates as follows: • As the chiller load initially dr

Figure 19 ACOA Capacity Control Chiller model Comp. off Comp. 1 on 33% Comp. 1 on 50% Comp. 1 on 66% Comp. 1 on 100% Comp. 1

Safety Considerations AEC, Inc. ACOA air-cooled central chillers are designed to provide safe and reliable operation when installed and operated withi

Figure 20 ACOA Fan Cycling Control Chart ACOA Refrig. Fan number “On” at each step model circuit Step > 1 2 3 4 Remarks ACOA15 1 OFF

- Notes - Page 40 ACOA Series Air-Cooled Central Chillers

6 Electrical Devices 6-1 Control Circuit Power Switch - S1 This switch energizes the 115 VAC control circuit. Keep it on at all times (except for te

6-7 Compressor Oil Failure Switch - 3PS Manual Reset, Time Delay This differential pressure switch continuously compares oil pressure with suction pr

6-12 Contactors - M Contactors, operated by the control circuit, provide power individually to the compressor and fan motors. Contactors are used eit

6-18 Motor Overload Protection - 1TAS Automatic Reset This solid-state device monitors the internal temperature of the compressor motor. If the maxim

7 Maintenance 7-1 Making Periodic Inspections A program of regular inspection, cleaning and preventive maintenance by trained personnel will contrib

When using chemicals for cleaning, pump a caustic solution through the heat exchanger. The chemicals attack dirt, slime, and mineral deposits and flus

If a component other than those listed fails, the compressor requires replacement. Return the compressor to your local Copeland distributor for replac

To determine the proper refrigerant charge, check the amount of subcooling at design full load conditions. The amount of subcooling at the liquid line

Table of Contents 1 General Information ... 7 1-1 Introduction 1-2 Necessary Documents 1-3 Models Cov

8 Troubleshooting Symptom Possible cause Solution Chiller does not start. Power off. Check main disconnect switch. Main line open. Check main

Symptom Possible cause Solution Compressor cycles on low pressure control. Improper water flow. Check pressure drop across evaporator for proper f

Figure 22 ACOA Isolator Specifications A B C D#1#2#3#4#5 #6 #7 #8ControlBoxEnd E ACOA Field-installed spring isolators model Set Position Dimens

ACOA Chiller Maintenance Log Sheet Model Number ACOA- Initial Start Up Date: Sheet # Serial Number Initial Start Up By: Chiller System No. Main

Figure 23 R-22 Refrigerant Pressure/Temperature Properties Pressure Temp Pressure Temp Pressure Temp Pressure Temp Pressure Temp Pressure Temp

Parts Department Call Toll-Free 7am–6pm CST [800] 423-3183 or call [847] 273-7700 The AEC/Application Engineering Parts Department at AEC, Inc. i

Table of Contents 6 Electrical Devices ...41 6-1 Control Circuit Power Switch - S1 6-2 Compressor

Charts and Figures 1 ACOA Specifications 92 ACOA15, ACOA20, and ACOA25 Outline Drawing 103 ACOA30 and ACOA35 Outline Drawing 114 ACOA45 Outline Dra

1 General Information 1-1 Introduction This manual provides all necessary information for installation, operation and maintenance of AEC/Application

1-4 ACOA Physical Specifications These air cooled units include semi-hermetic compressor(s), direct expansion internal finned evaporator, copper tube