Sunlife Enterprises DM240, DM300, DM180 installation manual LOW-PRESSURE Limit Switch

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356214-XIM-A-0108

has energized the economizer), "Y2" will energize compressor #1. If the outdoor air is above the setpoint, "Y2" will energize compressor #2.

Once the thermostat has been satisfied, it will de-ener- gize Y1 and Y2. If the compressors have satisfied their minimum run times, the compressors and condenser fans are de-energized. Otherwise, the unit operates each cooling system until the minimum run times for the compressors have been completed. Upon the final compressor de-energizing, the blower is stopped fol- lowing the elapse of the fan off delay for cooling, and the economizer damper goes to the closed position. If the unit is in continues fan operation the economizer damper goes to the min. position.

ECONOMIZER WITH DUAL ENTHALPY SENSORS -

HIGH-PRESSURE LIMIT SWITCH

During cooling operation, if a high-pressure limit switch opens, the UCB will de-energize the associated com- pressor, initiate the ASCD (Anti-short cycle delay), and, if the other compressor is idle, stop the condenser fans. If the call for cooling is still present at the conclu- sion of the ASCD, the UCB will re-energize the halted compressor.

Should a high-pressure switch open three times within two hours of operation, the UCB will lock-out the asso- ciated compressor and flash a code (see Table 24). If the other compressor is inactive, the condenser fans will be de-energized.

LOW-PRESSURE LIMIT SWITCH

The operation with the dual enthalpy sensors is identi- cal to the single sensor except that a second enthalpy sensor is mounted in the return air. This return air sen- sor allows the economizer to choose between outdoor air and return air, whichever has the lowest enthalpy value, to provide maximum operating efficiency.

ECONOMIZER (SINGLE OR DUAL ENTHALPY) WITH POWER EXHAUST -

The low-pressure limit switch is not monitored during the initial 30 seconds of a cooling system's operation. For the following 30 seconds, the UCB will monitor the low-pressure switch to ensure it closes. If the low-pres- sure switch fails to close after the 30-second monitor- ing phase, the UCB will de-energize the associated compressor, initiate the ASCD, and, if the other com- pressor is idle, stop the condenser fans.

This system operates as specified above with one addition. The power exhaust motor is energized 45 seconds after the actuator position exceeds the exhaust fan setpoint on the economizer control. When the power exhaust is operating, the second stage of mechanical cooling will not operate. As always, the "R" to "G" connection provides minimum position but does not provide power exhaust operation.

MOTORIZED OUTDOOR AIR DAMPERS -

This system operation is the same as the units with no outdoor air options with one exception. When the "R" to "G" circuit is complete, the motorized damper drives open to a position set by the thumbwheel on the damper motor. When the "R" to "G" circuit is opened, the damper spring returns fully closed.

COOLING OPERATION ERRORS

Each cooling system is monitored for operation outside of the intended parameters. Errors are handled as described below. All system errors override minimum run times for compressors.

Once the low-pressure switch has been proven (closed during the 30-second monitor period described above), the UCB will monitor the low-pressure limit switch for any openings. If the low-pressure switch opens for greater than 5 seconds, the UCB will de-energize the associated compressor, initiate the ASCD, and, if the other compressor is idle, stop the condenser fans.

If the call for cooling is still present at the conclusion of the ASCD, the UCB will re-energize the halted com- pressor.

Should a low-pressure switch open three times within one hour of operation, the UCB will lock-out the associ- ated compressor and flash a code (Table 24). If the other compressor is inactive, the condenser fans will be de-energized.

FREEZESTAT

During cooling operation, if a freezestat opens, the UCB will de-energize the associated compressor, initi- ate the ASCD, and, if the other compressor is idle, stop the condenser fans. If the call for cooling is still present at the conclusion of the ASCD, the UCB will re-ener- gize the halted compressor.

Johnson Controls Unitary Products

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Contents Installation Table of Contents List of Tables List of FiguresGeneral Safety ConsiderationsInspection ReferenceApprovals Renewal PartsTon Sunline & Magnum & MagnaDRY Model Number Nomenclature Product NomenclatureInstallation Safety Information InstallationLimitations Location Unit Application DataClearances Rigging and HandlingFixed Outdoor AIR Intake Damper DuctworkFilters Service AccessField Wiring DM ELECTRIC/ELECTRIC and GAS/ Electric Units Control Wire Sizes Power and Control WiringThermostat Electric Heat Application Data Optional Electric HeatGAS Heat Application Data Optional GAS HeatGAS Piping Pipe SizingExternal Supply Connection External SHUT-OFF Vent and Combustion AIR Hood Vent and Combustion AIR HoodsOptional Power EXHAUST/BAROMETRIC Relief Damper Rain Hood Enthalpy Setpoint Adjustment Four and SIX Point Loads Models Physical DataSize DM Electrical Data -WITHOUT Powered Convenience OutletDM Electrical Data -WITH Powered Convenience Outlet Front View Rear View Dimensions Unit Clearances and Rain Hood Dimensions 15, 20 & 25 TON AIR Temp Altitude Meter Altitude Correction FactorsALTITUDE/TEMPERATURE Conversion Factor High Static Drive CFM 80 m3/s 30 m3/s 10 m3/s 40 m3/s 1030 378 321 258 199 134 1070 417 361 299 240 XIM-A-0108 DM300 Unit Downflow Duct Connections CFM Static RESISTANCES1 Power Exhaust PerformanceBlower Motor and Drive Data Checking AIR Supply CFM PhasingDrop Pressure Nominal CFM Thousands Supply AIR IWGSequence of Operations Overview OperationCooling Sequence of Operation LOW-PRESSURE Limit Switch Reset Safety ControlsCompressor Protection Flash CodesLimit Control Setting Heating Operation ErrorsHeat Anticipator Setpoints Electric Heat Anticipator SetpointsGAS Valve Piping GAS Heating Operation ErrorsGAS Valve START-UP Cooling Shut Down START-UP GAS HeatPRE-START Check List POST-START Check List GASBurner AIR Shutter Adjustment Manifold GAS Pressure AdjustmentBurner Instructions Checking GAS InputAdjustment of Temperature Rise TroubleshootingCooling Troubleshooting Guide GAS Rate Cubic Feet PER HourXIM-A-0108 XIM-A-0108 XIM-A-0108 XIM-A-0108 GAS Heat Troubleshooting Guide XIM-A-0108 Unit Flash Codes Unit Control Board Unit Control Board Flash CodesOption Byte Setup Unit Control Board Option SetupXIM-A-0108 Johnson Controls Unitary Products Johnson Controls Unitary Products York Drive Norman, OK

DM300, DM240, DM180 specifications

Sunlife Enterprises has made significant strides in the competitive market of digital management tools with their innovative lineup of products: the DM240, DM300, and DM180. Each of these devices has been engineered to cater to specific operational needs while sharing a common foundation of advanced technology, versatility, and user-centric design.

The DM240 is an entry-level model that caters to small businesses looking for an efficient digital management solution without the hefty price tag. With a compact design and intuitive user interface, the DM240 allows for seamless integration into various work environments. Key features include a high-resolution touchscreen display, which facilitates easy navigation and quick access to essential functions. The device supports wireless connectivity options, ensuring users can manage tasks from anywhere within their operating environment. The energy-efficient design of the DM240 also promotes sustainability without compromising performance.

Moving up the line, the DM300 offers enhanced capabilities for medium-sized enterprises. This model is powered by advanced processing technology, allowing for faster data handling and superior multitasking. The DM300 features expanded memory and storage options, ensuring that users can manage larger datasets effortlessly. Additionally, with built-in advanced security features like biometric authentication and encrypted data storage, businesses can ensure that sensitive information remains protected. The intuitive software interface of the DM300 is designed for ease of use while providing advanced analytics tools to enable users to make data-driven decisions.

At the top of the range is the DM180, a sophisticated solution tailored to large organizations with complex digital management needs. The DM180 showcases a state-of-the-art design with high-performance computing capabilities. It features an expansive multi-touch display, allowing multiple users to interact simultaneously, facilitating collaboration and teamwork. The DM180 is equipped with cloud integration options, promoting real-time data access and sharing among teams, regardless of location. Its scalability ensures that businesses can adapt the system to accommodate growth without compromising functionality. Moreover, it offers comprehensive reporting and analytics tools, empowering organizations to gain valuable insights into their operations.

In summary, Sunlife Enterprises’ DM240, DM300, and DM180 models stand out for their unique features designed to meet the evolving needs of businesses. With a focus on user experience, performance, and security, these devices are poised to help organizations enhance productivity and drive innovation in the digital management landscape.
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