Daikin ACEF 3AVE- Manuals

6 IMM AGS-DP-1 Clearance Requirements Figure 2, Clearance Requirements, AGS 226DP – 501DP 5’-0” if open fence or 50% open wall6’-0” if solid wall (see note 3 for pit) 5’-0” if open fence or 50% open wall6’-0” if solid wall (see note 3 for pit) No obstructions.Recommended arearequired for unitoperati...

IMM AGS-DP-1 7 Restricted Airflow General The clearances required for design operation of AGS air-cooled condensers are described in the previous section. Occasionally, these clearances cannot be maintained due to site restrictions such as units being too close together or a fence or wall restrictin...

8 IMM AGS-DP-1 Case 1, Building or Wall on One Side of One Unit The existence of a screening wall, or the wall of a building, in close proximity to an air-cooled chiller is common in both rooftop and ground level applications. Hot air recirculation on the coils adjoining the wall will increase compr...

IMM AGS-DP-1 9 Case 2, Two Units Side By Side Two or more units sited side by side are common. If spaced closer than 12 feet (3.7 meters) it is necessary to adjust the performance of each unit; circuits adjoining each other are affected. If one of the two units also has a wall adjoining it, see Case...

10 IMM AGS-DP-1 Case 3, Three or More Units Side By Side When three or more units are side by side, the outside units (chillers 1 and 3 in this case) are influenced by the middle unit only on their inside circuits. Their adjustment factors will be the same as Case 2. All inside units (only chiller 2...

IMM AGS-DP-1 11 Case 3, Open Screening Walls Decorative screening walls are often used to help conceal a unit either on grade or on a rooftop. These walls should be designed such that the combination of their open area and distance from the unit do not require performance adjustment. It is assumed t...

IMM AGS-DP-1 13 Vibration Isolators Vibration isolators are recommended for all roof-mounted installations or wherever vibration transmission is a consideration. The following section "Lifting and Mounting Weights" contains the location of unit lifting holes and the load at each location. Mo...

16 IMM AGS-DP-1 Lifting and Mounting Weights Figure 16, AGS 226DP – AGS 251DP Lifting and Mounting Locations AGS226AGS251 AGS226AGS251 AGS226AGS251 AGS226AGS251 Figure 17, AGS 276DP - AGS 301DP Lifting and Mounting Locations 2 (51) Typical Spacing for Isolator Mounting (8) 88.0 (2235.2) Table 7, AGS...

IMM AGS-DP-1 17 Table 8, AGS 226DP - AGS 301DP Lifting and Mounting Weights (Copper Fin) Lifting Weight for Each Point lb (kg) Mounting Loads for Each Point lb. (kg) AGS Model L1 L2 L3 L4 L5 L6 M1 M2 M3 M4 M5 M6 M7 M8 Lbs. 2499 3359 2879 2879 3359 2499 1920 2562 1918 2559 2559 1918 2562 1920 226DP (...

IMM AGS-DP-1 19 Chilled Water Pump It is required that the starter(s) for the chilled water pump be wired to and controlled by the chiller's microprocessor. The controller will energize the pump whenever at least one circuit on the chiller is enabled to run, whether there is a call for cooling or no...

20 IMM AGS-DP-1 8. If the unit is used as a replacement chiller on a previously existing piping system, flush the system thoroughly prior to unit installation. Then regular chilled water analysis and chemical water treatment is recommended at equipment start-up. 9. In the event glycol is added to th...

IMM AGS-DP-1 21 1. A power failure will prevent pumpdown and there is a potential for freezing outdoor equipment in systems using 100 percent water as the chilled fluid. 2. Unit shutdown due to a fault will cause immediate compressor shutdown without the pumpdown cycle. This situation can be remedie...

22 IMM AGS-DP-1 1. These figures are examples only and cannot be appropriate to every situation. Generally, for an extended margin of protection, select a temperature at least 10 ° F lower than the expected lowest ambient temperature. Inhibitor levels should be adjusted for solutions less than 25% g...

IMM AGS-DP-1 23 Figure 20, Flow Switch Figure 21, Typical Field Water Piping Vent Drain Vibration Eliminator Flow Switch Balancing Valve Gate Valve Gate Valve Water Strainer Vibration Eliminator Valved Pressure Gauge In Out Protect All Field Piping Against Freezing Notes : 1. Connections for vent an...

24 IMM AGS-DP-1 1. Capacity - Cooling capacity is reduced from that with plain water. To find the reduced value, multiply the chiller’s water system tonnage by the capacity (Cap) correction factor to find the chiller’s capacity when using glycol. 2. Flow - To determine flow (or delta-T) knowing delt...

26 IMM AGS-DP-1 Physical Data Table 17, Physical Data, AGS 226DP – AGS 27DP AGS MODEL NUMBER 226DP 251DP 276DP DATA Ckt 1 Ckt 2 Ckt 1 Ckt 2 Ckt 1 Ckt 2 BASIC DATA Unit Cap. @ ARI Conditions, tons (kW) 220.5 (774) 243.9 (856) 270.5 (951) Unit Operating Charge lbs (kg) 298 (135) 298 (135) 298 (135) 32...

28 IMM AGS-DP-1 Dimensional Data Figure 23, Dimensions, AGS 226DP – AGS 301DP Note : 1. S ee page 16 f or lif t ing loc at ions , m ount ing loc at ions , weight s and m ount ing loads . 2. A llow one-inc h m anuf ac t uring t oleranc e. DWG. 330556901-R3 LOCATION FAR SIDE 12.0 (304.8) POWER ENTRY A...

30 IMM AGS-DP-1 Wind Baffles and Hail Guards Wind Baffles/Hail Guards are a field installed option that are used to stabilize unit operation in high wind areas and to assist in operation at low ambient temperatures. Figure 25 shows a typical panel assembly on an AGS unit. The actual number of panels...

IMM AGS-DP-1 31 Table 21, Packing List Description Part Number Bubble Number Vertical Support Rib 074758501 1 Top Cover 330409401 2 Front Panel 330409501 3 ¼ - 20 x ½” Screw (Place in Poly Bag) 046093807 Figure 26, Components VERTICAL SUPPORT RIB TOP COVER FRONT PANEL REAR (AGAINST UNIT) TOP Rib, In...

32 IMM AGS-DP-1 BAS/McQuay Remote Panel Interface BAS Interface Connection to the chiller for all building automation systems (BAS) protocols is at the unit controller. An optional interface module, depending on the protocol being used, may have been factory-installed in the unit controller (or it c...

IMM AGS-DP-1 33 Electrical Data Field Wiring General Wiring must comply with all applicable codes and ordinances. Damage to the equipment caused by wiring not complying with specifications is not covered under warranty. An open fuse or circuit breaker indicates a short, ground, or overload. Before r...

38 IMM AGS-DP-1 Electrical Data Notes 1. Allowable voltage limits Unit nameplate 460V/60Hz/3Ph: 414V to 506V Unit nameplate 575V/60Hz/3Ph: 518V to 632V 2. Unit wire size ampacity (MCA) is equal to 125% of the largest compressor-motor RLA plus 100% of RLA of all other loads in the circuit. 3. Single ...

IMM AGS-DP-1 39 Field Wiring Diagram Figure 27, Typical Field Wiring Diagram, Circuit #1 Control Box Note: Field-wired control connections are made in the control panel for circuit 1 only. LABEL DWG. 330803901 REV. 0D TO COMPRESSOR(S) AND FAN MOTORS DISCONNECT (BY OTHERS) 3 PHASE POWER SUPPLY GND LU...

40 IMM AGS-DP-1 Solid State Starters Solid state starters are standard on all AGS units. A solid state starter uses a silicon-controlled rectifier (SCR) power section to allow a motor to be brought to full speed with a reduced initial voltage that increases to full line voltage over a given time. Th...

IMM AGS-DP-1 41 OL OL will alternately blink with the normal display on the LED display when motor thermal overload content has reached 90% to 99% of its capacity. OLL The motor thermal overload content has reached 100%, and the motor has stopped. The motor cannot be restarted until the overloaded m...

42 IMM AGS-DP-1 Num ber Descri pti on Control l ed S top Auto Reset 37 Current I m bal anc e Y Y 38 G round F aul t Y N 39 No Current A t Run N Y 40 S hort ed/ O pen S CR N N 41 Current W hi l e S t opped N N 47 S t ac k P rot ec t i on F aul t N Y 48 B ypas s Cont ac t or F aul t (on S T O P i nput...

IMM AGS-DP-1 43 Figure 28, Trouble Shooting Guide Low or Missing Line? Phase Order Fault Thermal Trip? Interlock Open? Wiring OK? High Ambient? In-Line OK? Circuit Breaker OK? Fuses OK? Does Problem Still Exist Bad Air Circulation? Motor Overloaded? Wiring OK? Swap Any 2 Power Leads Correct and Wait...

46 IMM AGS-DP-1 Table 30, Solid State Starter Settings No. Operating Parameter Default Range of Setting P1 Motor Full Load Amps (FLA) Note 1 1A 1 to 9999A P2 Motor Rated Load Amps (RLA) Note 2 1A 1 to 9999A P3 Motor Service Factor 1.08 1.00 to 1.99 P4 Motor Overload cless 10 Off, 1 to 40 P5 Initial ...

IMM AGS-DP-1 47 Operation LED Display • View parameters, messages and faults • Shows software version on power-up Programming • Press PARAM to enter the menu and then UP or DOWN to reach the desired parameter. • Press ENTER to show the present value of the parameter. • Press UP or Down to change the...

48 IMM AGS-DP-1 Component Location Major Component Location Figure 29, Two-Compressor Unit Cutaway Oil Separator #1 Two-Circuit Flooded Evaporator Control/Power Panel Circuit #1 Condenser Section Circuit #2 Compressor #2 Control/Power Panel Circuit #2 Compressor #1

IMM AGS-DP-1 49 Figure 30, Piping Schematic DISCHARGE TUBING SIGHT GLASS AIR FLOW WATER OUT WATER IN LIQUID TUBING EXPANSION VALVE SCHRADER VALVE CHARGING VALVE SIGHT GLASS CONDENSER ASSEMBLY AIR FLOW AIR FLOW AIR FLOW CONDENSER ASSEMBLY CHARGING VALVE LIQUID SHUT-OFF VALVE SCHRADER VALVE FILTER DRI...

50 IMM AGS-DP-1 Power Panel Each compressor and its associated refrigerant circuit and controlled devices have a dedicated power and control system. They are contained in a duplex panel, the outer box containing the MicroTech II microprocessor with related accessories and the inner box containing th...

IMM AGS-DP-1 51 Control Panel The control panel for Circuit #1 is shown below. The panel for circuit #2 and #3 is similar but does not contain the Unit Controller. Distributed control architecture enhances unit reliability. Each compressor circuit has its own microprocessor controller so that if one...

52 IMM AGS-DP-1 Optional Features There are a number of options that may or may not be present on any specific unit. These options can affect unit control operation and how a unit is installed and wired. Controls Ice Storage The unit is equipped with control logic to handle the low temperatures asso...

IMM AGS-DP-1 53 High- Short Circuit Current Protection The control panels and single point connection box (if ordered) will have the high short circuit current rating as shown below. A high interrupt circuit breaker is included. 115 Volt Convenience Outlet A 10.0 amp, 115-volt convenience outlet mou...

54 IMM AGS-DP-1 Start-up and Shutdown NOTICE McQuayService personnel or factory authorized service agency must perform initial start-up in order to activate warranty. CAUTION Most relays and terminals in the unit control center are powered when S1 is closed and the control circuit disconnect is on. ...

IMM AGS-DP-1 55 CAUTION The unit has a one-time pumpdown operation. When the CS switches are in the Off position the unit will pump down once and not run again until the switches are moved to the On position. If the CS switches are in the On position and the load has been satisfied, the unit will do...

IMM AGS-DP-1 57 System Maintenance General On initial start-up and periodically during operation, it will be necessary to perform certain routine service checks. Among these are checking the liquid line sight glasses, evaporator sight glasses, and oil separator sight glasses, plus taking a full set ...

58 IMM AGS-DP-1 Electrical Terminals DANGER Electric shock hazard and risk of personal injury or death exists. Turn off all power before continuing with following service. Periodically check electrical terminals for tightness and tighten as required. Condensers The condensers are air-cooled and cons...

IMM AGS-DP-1 59 NOTE : Exceeding normal charge can result in abnormally high discharge pressure and relief valve discharge, or cause low discharge superheat resulting in oil loss into the system. An element inside the sight glass indicates the moisture condition corresponding to a given element colo...

60 IMM AGS-DP-1 Preventative Maintenance Schedule PREVENTATIVE MAINTENANCE SCHEDULE OPERATION WEEKLY MONTHLY (Note 1) ANNUAL (Note 2) General Complete unit log and review (Note 3) X Visually inspect unit for loose or damaged components and visible leaks X Inspect thermal insulation for integrity X C...

IMM AGS-DP-1 61 Service CAUTION 1. Service on this equipment is to be performed by qualified refrigeration personnel familiar with equipment operation, maintenance, correct servicing procedures, and the safety hazards inherent in this work. Causes for repeated tripping of equipment protection contro...

62 IMM AGS-DP-1 1. On the circuit controller, under the "SET EXV SPs (2)", change the "Service Pumpdown" set point from "No" to "Yes". 2. If the circuit status is "Off:PumpDwnSw", move the circuit pumpdown switch from "Pumpdown and Stop" to "Auto&#...

IMM AGS-DP-1 63 Evaporator The evaporator is a flooded, shell-and-tube type with water flowing through the tubes and refrigerant flowing up the shell over the tubes. The tubes are internally enhanced to provide extended surface and turbulent flow of water through the tubes. Normally no service work ...

66 IMM AGS-DP-1 Charging Oil The oil separator is equipped with two sight glasses that are used to indicate oil quantity. Oil charge determination must be done at, or near, full load. It may be normal to see the oil below the bottom sight glass while running at part load conditions due to oil laying...

IMM AGS-DP-1 69 Fan Stages with VFD Option The VFD option must always be enabled. The first two fans are controlled by the fan VFD. This leaves 6 stages of fan control available with 8 fan circuits, and 4 stages available on 6 fan circuits. Although fans 5/6 and 7/8 are controlled by one contactor e...

70 IMM AGS-DP-1 When a stage down occurs, or the saturated temperature rises back within the Stage Down deadband, the Stage Down Error Accumulator is reset to zero. The accumulator is also held at zero after startup until either the outside ambient temperature is less than, or equal to 75 ° F (23.9 ...

IMM AGS-DP-1 71 Controls, Settings and Functions Table 35, Controls DESCRIPTION FUNCTION SYMBOL SETTING RESET LOCATION Compressor Heaters To provide heat to drive off liquid refrigerant when compressor is off. HTR1-COMPR On, when compressor is off. N/A On the Compressor Compressor Solenoid - Load Lo...

72 IMM AGS-DP-1 Troubleshooting Chart Table 36, Troubleshooting PROBLEM POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS Compressor will not run. 1. Main power switch open. 2. Unit S1 system switch open. 3. Circuit switch, CS in pumpdown position. 4. Chilled water flow switch not closed. 5. Circuit breaker...

IMM AGS-DP-1 73 Periodic Maintenance Log Date of inspection: Address: Facility/job name: City/State: Unit model number: Physical location of unit: Unit serial number: Service technical (name): Software identification: Operating hours: Compressor #1 Compressor #2 Compressor #3 Number of starts Compre...