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Related Manuals for Desert Aire CM3540 Series
Summary of Contents for Desert Aire CM3540 Series
- Page 1 CM3540 Series Controller Installation and Operation Manual for LW units Advanced program capabilities. Internal Display Terminal (IDT) Multiple communication interface options: - LonWorks ® - BACnet™ Ethernet - BACnet™ MS/TP - Modbus ® Precise temperature and humidity control.
- Page 3 TERMS Desert Aire warrants all components (except as noted) for a period of two (2) years from the date of shipment. This warranty shall be limited to the supply of new or rebuilt parts for the part which has failed because of defects in workmanship or material, and does not include the cost for labor, transportation or other costs not herein provided for.
- Page 4 E-MAIL: service@desert-aire.com Additional copies of this manual can be purchased for a nominal fee from Desert Aire. Desert Aire also posts the most current revision of our I/O Manuals on our website. For a digital copy of the I/O Manual for your unit revision, please submit request to the contact information listed above.
- Page 5 Product Warning for the State of California Desert Aire - CM3540 Manual...
- Page 6 Desert Aire - CM3540 Manual...
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Page 7: Table Of Contents
2.2.4.4 Air Heat Settings ................2.2.4.5 Condenser Settings ............... 2.2.5 Unit Revision ....................Alarms ..........................3.1. Alarm Menu ......................3.1.1. Alarm Screen .................... 3.1.2. Low Suction Pressure ................3.1.3. High Discharge Pressure ................3.1.4. Compressor Overload ................Desert Aire - CM3540 Manual... - Page 8 Hardware Details ......................4.1. Programmable Controller ..................4.2. Suction Pressure Transducer ................. 4.3. Discharge Pressure Transducer ................4.4. Defrost and Ambient Temperature Sensor ............. 4.5. Zone Air Temperature / Relative Humidity Sensor ..........Appendix ..........................Desert Aire - CM3540 Manual...
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Page 9: Installation
1.1. Humidity and Temperature Control Package Your Desert Aire CM3540 controller is designed for precise monitoring and control of air temperature and relative humidity (RH) within a conditioned environment. This CM3540 control system is easy to install and operate. It features a display mounted on the controller face which allows you to view and adjust set points and modes of operation. - Page 10 Install using 24-16 AWG stranded wire; 18 AWG stranded wire is recommended. Do not run sensor wiring adjacent to, OR in the same conduit as, wires carrying more than 24 VAC. See manufacturer’s specifications for more details. Desert Aire - CM3540 Manual...
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Page 11: Lw Controller Details
The internal display (IDT – Figure 1) allows the operator to monitor the operation and adjust the set points of your Desert Aire LW dehumidifier. The IDT has an LCD screen and six keys. The keys from left to right are: The Home Screen displaying the Desert Aire logo (Figure 2) can show three items. -
Page 12: Main Menu
Pressing the Esc key from the Home Screen displays the MAIN MENU. This menu allows the operator to select the STATUS MENU, Unit Set points, Occupancy Menu, Service Menu or Unit Revision. To return to the HOME SCREEN, press the Esc key. Desert Aire - CM3540 Manual... -
Page 13: Status Menu
“RC Unavailable.” The occupied state is listed either as “Occupied” or “Un-Occupied.” The Unit Status will show one of the following states: • Unit Off/Satisfied • Heating Required • Cooling Required Desert Aire - CM3540 Manual... -
Page 14: I/O Status
To return to the Unit Status Menu, press the Esc key. Figure 5 2.2.1.2 I/O Status (Figure 6) Selecting the I/O Status from the STATUS MENU displays Digital Inputs, Analog Inputs, Digital Outputs and Analog Outputs. To return to the Unit Status Menu, press the Esc key. Figure 6 Desert Aire - CM3540 Manual... -
Page 15: Digital Inputs
The Analog Inputs Screen shows the current readings of the Zone Relative Humidity, Zone Temperature, Return Air Temperature, Suction Line Temperature, Suction Pressure and Discharge Pressure. To return to the I/O STATUS, press the Esc key. Desert Aire - CM3540 Manual... -
Page 16: Digital Outputs
• Defrost Sol: Turns on the defrost solenoid. • Liquid Sol: Turns on the liquid solenoid. • Occupancy: Turns on the occupancy relays. Note: Refer to the CM3540 electrical schematic for point identification. Figure 9 Desert Aire - CM3540 Manual... -
Page 17: Analog Outputs
These pressure settings are factory-set and cannot be changed by the operator. To return to the STATUS MENU, press the Esc key. Figure 11 Desert Aire - CM3540 Manual... -
Page 18: Unit Setpoints
Select the SCHEDULE SETUP from the MAIN MENU to show the OCCUPANCY SCHEDULE MENU. From this menu you can access and adjust the Schedule Options, Temporary Holidays, Annual Holidays, Temporary Occupancy and Time settings. To return to the MAIN MENU, press the Esc key. Figure 13 Desert Aire - CM3540 Manual... -
Page 19: Schedule Options
Up to 10 schedules can be active at any time. These allow for different start and stop times on various days of the week, weekends or programmed holidays. To return to the OCCUPANCY MENU, press the Esc key. Desert Aire - CM3540 Manual... -
Page 20: Temporary Holidays
Select the number to assign to the Annual Holiday and then select the Start Date and the End Date for that holiday. To return to the OCCUPANCY MENU, press the Esc key. Desert Aire - CM3540 Manual... -
Page 21: Temporary Occupancy
To clear this occupied override, set the hours and minutes to zero and press the Prg key. This screen will now show “Override Off”. To return to the OCCUPANCY MENU, press the Esc key. Figure 18 Desert Aire - CM3540 Manual... -
Page 22: Set Time
To return to the OCCUPANCY MENU, press the Esc key. Figure 19 2.2.4 Service Menu (Figure 20 and 21) Selecting the SERVICE MENU will display the Login Screen (Figure 20). Enter the service password, 1234, and press the ENTER key. Figure 20 Desert Aire - CM3540 Manual... -
Page 23: Deadbands
0.0°F to 9.9°F. The range of the Heating DB is 0.0°F to 9.9°F. Refer to the differential screen to set the cooling and heating switch differentials. To return to the SERVICE MENU, press the Esc key. Desert Aire - CM3540 Manual... -
Page 24: Differentials
0.0% RH to 9.9% RH. To modify these set points, press the ENTER key and use the arrow keys until the desired setting is shown. Press the ENTER key again to accept the set point value. To return to the SERVICE MENU, press the Esc key. Figure 23 Desert Aire - CM3540 Manual... -
Page 25: Sensor Offsets
Pressing the ENTER key will now change the set point. The set point, actual zone temperature and the output of the control settings are displayed at the bottom of this screen for reference. To return to the SERVICE MENU, press the Esc key. Desert Aire - CM3540 Manual... -
Page 26: Condenser Settings
ENTER key, select “No” and modify this setting to “Yes”. Please note that in this case, overheating the space may occur or cause safety devices to trip. If this occurs, contact Desert Aire’s Service Department at (262) 946-7400. -
Page 27: Unit Revision
The Unit Revision Screen (Figure 29) shows the version of the application program that is running along with the release date of the software. This information should be passed to the Desert Aire Service Department in the event that a service call is necessary. - Page 28 Figure 29 To return to the MAIN MENU, press the Esc key. Desert Aire - CM3540 Manual...
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Page 29: Alarms
This condition would only occur on a loss of refrigerant in a circuit or an extremely low operating temperature. The red ALARM LED on the display will stay lit until the alarm is reset. Desert Aire - CM3540 Manual... -
Page 30: High Discharge Pressure
0 – Unit is off or the zone is satisfied 1 – Heating is required 2 – Cooling is required 3 – Dehumidification is required 4 – Dehumidification and heat is required 5 – Dehumidification and cooling is required Desert Aire - CM3540 Manual... - Page 31 To access the history of alarms, press the DOWN key. The last 100 alarm conditions are saved in this history with the 101st being overwritten. Figure 32 Desert Aire - CM3540 Manual...
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Page 33: Hardware Details
Hardware Details 4.1. Programmable Controller The programmable controller is pre-programmed by Desert Aire for the control of your unit. The Desert Aire replacement part number for this controller is available by calling our service department. 4.2. Suction Pressure Transducer The Suction Pressure Transducer is a 0.5 - 4.5 VDC to 0 - 250 psig ratiometric device. The body is brass with a ¼”... -
Page 34: Defrost And Ambient Temperature Sensor
-623.3º F if the sensor is open, and display a reading of 687.3º F if the sensor is shorted. The Desert Aire replacement part number for the Temperature Sensor is available by calling our service department. -
Page 35: Appendix
Appendix File downloads for BMS connectability are available on Desert Aire’s website at www.desert-aire.com. Desert Aire - CM3540 Manual... - Page 36 PTIMIZING OLUTIONS HROUGH UPERIOR EHUMIDIFICATION ECHNOLOGY N120 W18485 Freistadt Road • Germantown, WI 53022 • E-mail: info@desert-aire.com Ph: (262) 946-7400 • Fax: (262) 946-7401 • Website: www.desert-aire.com 341 2018/12...