EMI CAC manual Product Description, Standard Features, System Options

Page 3

PRODUCT DESCRIPTION

The EMI AmericaSeries Cassette Evaporator is available in three cabinet sizes with six cooling output capacities from 9,000-36,000 Btuh in DX refrigeration. Key features include a condensate pump with safety switch and a 36” lift*; electric heat is a factory installed option ONLY (there are no field installed electric heat kits available); fresh air inlet and branch duct knockouts; and motorized air vanes (18-36 only). The CAC accepts a 24 Volt thermo- stat control (thermostat not included). De- signed for low noise levels, easy installation and maintenance and a slim line fascia, all ensure minimum intrusion into the working environment.

Due to ongoing product development, all designs and specifications are subject to change without notice.

*Condensate pump lift measured from the base or bottom of the unit.

This American-made CAC Cassette Evaporator produces system SEER’s meet- ing or exceeding 13, when matched with EMI’s S1C single zone or S2C dual zone side discharge condensing units or with T2C, T3C, or T4C top discharge multi-zone condensing units. Refer to specifications contained in this document.

All EMI Air Handlers are backed by Enviromaster International LLC and are tested and rated in accordance with ARI standards 210/240 and UL 1995.

STANDARD FEATURES

Materials of Construction - Galva- nized steel cabinet with fire-resistant thermal and acoustic foam insulation and light grey high-impact ABS fascia. A Styro- foam drain pan with a tough fire retardant thermoplastic liner.

Air Systems:

•Fans are backward curved impeller centrifugal design; dynamically and statically balanced; and mounted on integral mounting rails.

STANDARD FEATURES

Continued

•Single Fan models (09-24) designed with fire retardant plastic or aluminum impellers.

•Twin Fan models (30-36) designed with fire retardant plastic impellers.

•Motors are multispeed, enclosed type with thermal protection and sealed life- time bearings.

•Permanent, washable filter (user ac- cessible).

•Branch duct knockouts on two sides for remote discharge locations.

•Fresh air intake capability on three sides of cabinet (2 on CAC 09-12).

•Four plastic air vanes; motor driven with auto sweep or fixed position stop setting on models 18-36 (models 09-12 equipped with manually adjusted air vanes).

Coil - Coil is seamless, copper tubing, arranged in staggered configuration, with enhanced aluminum fins, tested to 600 psig. The tubes are mechanically expanded for secure bonding to fin shoulder.

Refrigeration Circuit - Units are equipped with a serviceable fixed orifice expansion device.

Controls and Components (factory

installed or supplied):

•Connections for 24V remote wall ther- mostat.

•Custom control board featuring anti- short cycle timer; 60 second post purge fan relay; and on board 30 amp electric heat relay.

•Relays and connectors to condensing unit.

•Condensate Pump with 36” lift – mea- sured from base of unit.

•24V Transformer.

System Options:

•24V remote wall thermostat.

•Electric Heat (@ 230V) 1.5KW (9,000-12,000 Btuh) 3KW (18,000-24,000 Btuh) 5KW (30,000-36,000 Btuh)

CAC Cassette Evaporator

3

www.enviromaster.com

Page 2 Page 4
Image 3
Page 2 Page 4
Contents Nominal Circuit Capacities INSTALLATION, Operation and Maintenance ManualTo the Installer Safety InstructionsCAC Cassette High Efficiency Evaporator Standard Features Product DescriptionSystem Options CAC Cassette Controls and Components Preparation for InstallationSmall Unit Shown Medium Unit ShownLarge Unit CAC Cassette Preparation and Positioning PISTON/ORIFICE Installation InstructionCeiling opening Mounting the CAC Cassette Ceiling EvaporatorMAX CAC Cassette Chassis Positioning and InstallationCondensate Piping Correct IncorrectPiping DO’S and DON’TS Pipe Installation Notes Refrigeration PipingUse of a larger line can harm Compressor Assembly Instructions CAC Cassette Evaporator Fascia Installation InstructionsCAC Cassette Evaporator Installation Instructions Electrical WiringMake sure power is off Low Volt Interconnect Wiring High Volt Electrical WiringStart -UP for Wall Thermostat Control LOW Voltage Interconnect WiringFigure #4 Refrigerant Processing Important Notes CAC Cassette Evaporator Test Unit Performance Data Test Unit Performance Data SheetMaintenance and Troubleshooting Procedure Power Supply Check Troubleshooting ProcedureLow Volt Controls Cooling Only UnitsElectric Heat How long will the fan run? Frequently Asked QuestionsCAC Performance Data Discharge AIR VolumeSmall Cabinet CAC 9,000 12,000 CAC Cassette DimensionsMedium Cabinet CAC 18,000 24,000 Large Cabinet CAC 30,000 36,000 CAC Cassette System Matches CAC Electrical SpecificationsT2C, T3C & T4C Top Discharge Enviromaster International LLC ALL Product Limited WarrantyT2C, T3C & T4C 2, 3 & 4 Zone Top Discharge EMI’S High Efficiency Product LineHigh Wall Evaporator S1C & S1H Single Zone S2C Dual Zone

CAC specifications

EMI CAC, or Electromagnetic Interference Common-mode Current, is a critical concern in electronic device design and operation. It refers to the unwanted electromagnetic energy that can disrupt the normal functioning of electronic circuits, particularly in complex systems. EMI can arise from various sources, including power lines, radio frequency transmitters, and even other components within the same device.

One of the main features of EMI CAC is its dual nature. It can be both a source of interference and a metric to assess the integrity of electronic systems. The impacts of EMI are far-reaching, affecting communication signals, power supply reliability, and overall device performance. As technology progresses and devices become more compact, the likelihood of EMI issues increases, making it essential for engineers to develop effective solutions.

Several technologies are employed to mitigate EMI CAC in electronic systems. Shielding is one of the most common methods, involving the use of conductive materials to block electromagnetic fields. This can take the form of metal enclosures or coatings that prevent the escape of emissions. Another strategy involves the use of filters, such as ferrite beads and capacitors, which can suppress common-mode currents before they enter the sensitive parts of a circuit.

The characteristics of EMI CAC vary depending on several factors, including frequency, amplitude, and the specific environment in which the electronic devices operate. High-frequency EMI is particularly challenging due to its ability to penetrate enclosures and disrupt signals. Additionally, common-mode noise can often appear in differential signals, exacerbating the situation and making detection more difficult.

Achieving EMC (Electromagnetic Compatibility) is a major goal for designers dealing with EMI CAC. This involves not only reducing emissions from devices but also improving their immunity to external sources of interference. Effective grounding techniques and careful layout planning are crucial in minimizing EMI effects.

In summary, EMI CAC represents a significant challenge in modern electronics, with a need for advanced solutions to ensure device performance and reliability. By understanding its features, employing effective technologies for mitigation, and addressing its characteristics, engineers can create robust designs that thrive in the increasingly complex electromagnetic landscape of today’s technological world.
Top Page Image Contents