CAT 624-2 AGZ-E Air Cooled Chiller
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Model AGZ-E Catalog 624-2 Air-Cooled Scroll-Compressor Chillers

Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . 4 Application Considerations . . . . . . . . . . . . . . . . . . . 8 Sound Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . 18 Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Part Load Performance Data (60 Hz) . . . . . . . . . . 22 Part Load Performance Data (50 Hz) . . . . . . . . . . 23 Pressure Drop Data . . . . . . . . . . ....

Introduction Introduction Air Cooled Chiller Products A Air-Cooled Scroll Compressor Chiller M Model AGZ-B • 10 - 34 RT Air-Cooled Scroll Compressor Chiller Model AGZ-E • 30 - 70 RT Model AGZ-D • 75 - 190 RT Remote Evaporator and Pump Package options available A Air-Cooled Screw Compressor Chiller Model AGS • 140 - 200 RT M Pathfinder™ Air-Cooled Screw Compressor Chiller Model AWS • 170 - 550 RT Standard, High, and Premium Efficency VFD and Remote Evaporator options available The AGZ family of air-cooled scroll chillers continues the Daikin Applied legacy of high quality, high efficiency,...

Chiller Nomenclature A G Z XXX E H Air-Cooled Global Design Scroll Compressor Nominal Tons Unit Design Features Features and Benefits Daikin AGZ air-cooled chillers are a product of our commitment to offer quiet, reliable, energy efficient equipment, incorporating high quality compressors, and innovative packaging. Construction AGZ chillers are factory-assembled and mounted on a heavygauge steel base. The base rails, supports and cabinetry are powder-coat painted for long life. The base distributes the unit weight for roof loading. Their small footprint allows smaller mounting pads or...

Features and Benefits Condenser Fans and Motors Multiple direct-drive, dynamically balanced propeller fans operate in formed venturi openings at low tip speeds for maximum efficiency and minimum noise and vibration. A heavy-gauge vinyl-coated fan guard protects each fan. The MicroTech III controller's design will not only permit the chiller to run more efficiently, but will also simplify troubleshooting if a system failure occurs. Every MicroTech III controller is programmed and tested prior to shipment to help provide a trouble-free start-up. Each condenser fan motor (including the...

Features and Benefits Optional Remote Interface Panel Optional Pump Package In addition to the unit-mounted user interface provided with MicroTech® III controls, the AGZ chillers can be individually equipped with a remote user interface. It provides convenient access to unit diagnostics and control adjustments without having to access a rooftop or outdoor location. One remote panel can be connected to up to eight chillers. The on-board, integrated chilled water pump package provides important benefits: Features Each remote user interface is similar to its unit-mounted counterpart and offers...

Features and Benefits Optional Variable Flow VFD The operating cost savings resulting from using variable chilled water flow via a pump VFD is well known. In the past, however, its usage has been somewhat limited by the cost and uncertainty of field installing the required system pressure differential sensors. Daikin Applied can now offer an innovative variable chilled water flow system completely self-contained within the pump package by simply ordering the optional pump VFD-no external sensors required. In addition to the sensorless operation, there are three other selectable operating...

Application Considerations Unit Placement Spacing Requirements AGZ units are for outdoor applications and can be mounted either on a roof or at ground level. For roof mounted applications, install the unit on a steel channel or I-beam frame to support the unit above the roof. For ground level applications, install the unit on a substantial base that will not settle. Use a one-piece concrete slab with footings extended below the frost line. Be sure the foundation is level within 0.5” (13mm) over its length and width. The foundation must be strong enough to support the weights listed in the...

Application Considerations Case 3: Three or More Units, Side-by-Side Maintain a minimum of 6-feet on all sides. For more than three units, allow an additional 2-feet clearance between units. Pit installations can cause operating problems resulting from air recirculation and restriction and require care that sufficient air clearance is provided, safety requirements are met and service access is provided. Pit covers must have abundant open area at least equal to the chiller footprint.A solid wall surrounding a unit is substantially a pit and this data should be used. Figure 6: Case 3 - 3...

Application Considerations Chilled Water Piping IMPORTANT: Piping design must be provided by a qualified Architect or Systems HVAC Design Engineer familiar with piping design, as well as local codes and regulations. The manufacturer recommendations provided here are to be used as a general guide, but do not replace system design by a qualified professional. Follow all instructions and recommendations for Chilled Water Piping in the current version of the installation manual available on www.DaikinApplied.com. Design the water piping so the chilled water circulating pump discharges into the...

Application Considerations Evaporator Variable Flow Reducing evaporator flow in proportion to load can reduce system power consumption. The rate of flow change should be a maximum of 10 percent of the flow per minute. For example, if the maximum design flow is 200 gpm and it will be reduced to a flow of 140 gpm, the change in flow is 60 gpm. Ten percent of 200 gpm equals 20 gpm change per minute, or a minimum of three minutes to go from maximum to desired flow. Do not reduce flow lower than the minimum flows listed in the evaporator pressure drop section, page 24. The water flow through the...