EMI manual Mounting the CAC Cassette Ceiling Evaporator, Ceiling opening

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CAC CASSETTE CHASSIS POSITIONING AND INSTALLATION

ELECTROMECHANICAL

THERMOSTAT

An optional thermostat can be obtained through EMI or your local distributor. In addition to positioning the Cassette cor- rectly, it is very important to locate the wall mounted thermostat in the optimum posi- tion to ensure good temperature control. Therefore the installation should be se- lected with the following points in mind:

1.Position the thermostat approximately 5 ft. above floor level.

2.Avoid external walls and drafts from windows and doors.

3.Avoid positioning near shelves and cur- tains as these restrict air movement.

4.Avoid heat sources (direct sunlight, heaters, dimmer switches, etc.)

5.Seal wiring holes in the wall behind the thermostat to avoid drafts.

MOUNTING THE CAC CASSETTE

CEILING EVAPORATOR

Ceiling opening:

(In existing construction) Remove enough ceiling panels to provide clearance space for mounting unit to ceiling joists.

Before beginning the installation, inspect the unit location, test the strength of the ceiling joists to insure they will support the weight of the unit.

Determine mounting method:

-On wooden beams use threaded rods, washers, and nuts to suspend support brackets.

-With metal structures, secure thread- ed rods on an existing angle or install a new support angle.

-On newly built concrete slabs secure threaded rods with inserts and em- bedded bolts.

An opening in the false ceiling will have to be cut to the following sizes:

Small cabinet 23¼” x 23¼” Medium cabinet 33⅞” x 33⅞” Large cabinet 46 x 33⅞”

Figure #2

Cabinet

A

B

Small

19½”

23”

Medium

29⅝”

31½”

Large

29⅝”

431116

A template for ceiling cut-out and rod posi- tions can be found with the Cassette unit.

1.500 TYP

2.000 X 45° TYP

Rod

PositionsRod Positions

NOTE: Make sure the ceiling grid is supported separately from the Cas- sette. The ceiling must not be sup- ported by any part of the Cassette unit, fascia or any associated wiring or pipe work.

-For previously built concrete slabs install hanging bolts with an expansion anchor.

-Follow local building codes for required safety cables, braces, etc.

1.Use the template (provided) to cut the ceiling opening and determining the rod positions.

CAC Cassette Evaporator

7

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Contents Nominal Circuit Capacities INSTALLATION, Operation and Maintenance ManualSafety Instructions To the InstallerCAC Cassette High Efficiency Evaporator Product Description Standard FeaturesSystem Options CAC Cassette Controls and Components Preparation for InstallationMedium Unit Shown Small 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 IncorrectRefrigeration Piping Piping DO’S and DON’TS Pipe Installation NotesUse of a larger line can harm Compressor Assembly Instructions CAC Cassette Evaporator Fascia Installation InstructionsElectrical Wiring CAC Cassette Evaporator Installation InstructionsMake 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 ProcedureCooling Only Units Low Volt ControlsElectric 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.