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Desert Aire CM35xx Quick Start Manual Download Page 11

11

 

 

low pressure trip is varied based upon the glycol ratio.

 3.12 

Sensor 

Offsets

 

 

This screen allows the control values of the analog input points to be adjusted if 

 

 

calibration shows these devices to be inaccurate.  The range of these offsets that can 

 

 

be entered is from -99.9 to 99.9. Care must be used when applying an offset to an 

 

 

analog value as erratic operation can result. To modify the offsets, press the ENTER 

 

 

key until the desired offset is selected and use the arrow keys until the desired setting 

 

 

is shown. Pressing the ENTER key will now change the offset.

 3.13 

Building 

Management 

Communication

 

 

The Building Management Communications is set to correspond with the serial card 

 

 

installed in the controller.  The communication types available with a CM35xx controller 

 

 

are LONWORKS®, BACnet™ MSTP, BACnet™ EtherNET or ModBus® Slave.  The 

 

 

correct serial card must be installed in the controller for the BMS communications to 

 

 

be active. In the ModBus® Slave mode, the baud rate and address will be displayed. 

 

 

The baud rate can be set to 1200, 2400, 4800, 9600 or 19200. The address should be 

 

 

set to the node number for the dehumidifi er on the ModBus® network.

4. Alarm 

Menu

 

The ALARM MENU can be accessed anytime by pressing the ALARM key.  The main Alarm 

 

Screen includes the instructions for viewing and resetting the alarms, as well as a means to 

 

access the Alarm History Screen.  Pressing the ENTER key while viewing the main Alarm 

 

Screen will reset any alarm that has returned to its safe state. Please note that active alarms 

 

can only be reset on this screen and not while the alarm is being displayed. Return to this 

 

screen and press the ENTER key to reset any alarm that has returned to its safe state. Any 

 

active alarm can be viewed by pressing the DOWN key from this screen. If no alarm screen is 

 

shown, no alarms are active. To view the Alarm History Screen, press the ALARM key.

 4.1 

Alarm 

History 

Screen

 

 

The Alarm History Screen is accessible from the main Alarm Screen by pressing the 

 

 

ALARM key. This screen lists a history of alarm conditions by time and date which 

 

 

have existed on the unit. The most recent alarm will be displayed as 001. The 

 

 

condition that triggered the alarm will be displayed along with the sensor data saved 

 

 

at the time the alarm was triggered. This is done to aid in troubleshooting the alarm 

 

 

condition. To access the entire listing of the alarm history, use the DOWN key to scroll 

 

 

through the recorded alarms.

 

Desert Aire - CM35xx Quick Start Guide

Summary of Contents for CM35xx

Page 1: ......

Page 2: ...2 ...

Page 3: ...8 3 5 Occupancy Schedule 8 3 5 1 Schedule Options 9 3 5 2 Current Schedule 9 3 5 3 Temporary Holidays 9 3 5 4 Annual Holidays 9 3 5 5 Set Time 9 3 6 Unit Revision 9 3 7 Service Menu 10 3 8 Unit Status 10 3 9 Factory Configuration 10 3 10 I O Status 10 3 11 Pressure Cutouts 10 3 12 Sensor Offsets 11 3 13 Building Management Communication 11 4 Alarm Menu 11 4 1 Alarm History Screen 11 Desert Aire CM3...

Page 4: ...4 Desert Aire CM35xx Quick Start Guide ...

Page 5: ...ote display terminal RDT Although the placement of the keys for these two options is different the key functions are exactly the same Figure 1 shows an RDT and Figure 2 shows an IDT The ND SA and LC products will use the RDT and the QM will use the IDT The IAQ products will use a combination of RDTs and IDTs typically depending on the physical placement of the controller in the unit If the control...

Page 6: ...ontroller is pre programmed and configured at the factory for use in the application you have specified The RDT Figure 1 allows the operator to monitor the operation and adjust the setpoints of the Desert Aire dehumidifier The RDT has an LCD screen and 6 keys The keys on the left hand side of the RDT top to bottom are the ALARM key shown as an alarm bell PROGRAM key abbreviated Prg and the ESCAPE key...

Page 7: ...y is pressed To cycle through the selections on a menu screen use the UP and DOWN keys If setpoints or selections can be altered on a screen the ENTER key will cycle through those items Once the cursor is over an item the UP and DOWN arrow keys will modify the setting Numeric values will require that the ENTER key be pressed to accept the value An on or off selection will be altered as soon as the...

Page 8: ...efer to Section 3 for setpoint modification instructions 3 4 Temporary Occupancy This screen allows the operator to set the unit into occupied mode for a preset amount of time Press the ENTER key and enter in the hours and minutes you would like the unit to be temporarily in the occupied mode When the cursor is blinking over the Press Prg to set message pressing the Prg key will override the schedu...

Page 9: ...idays can be set from this screen Select the number to assign to the Annual Holiday and then select the Start Date and the End Date for that holiday 3 5 4 Annual Holidays The Annual Holiday settings are for holidays with dates that remain constant year to year such as New Years Day and the 4th of July Up to 10 different annual holidays can be set from this screen Select the number to assign to the...

Page 10: ...puts analog inputs digital outputs and analog outputs The Digital Input Screen will display the state of any switch wired to a digital input on the wiring diagram The digital inputs are designated as ID on the controller and include switches or contacts The Analog Input Screen displays the status of any sensors wired to the analog inputs on the wiring diagram The analog inputs are designated as B ...

Page 11: ...he ModBus network 4 Alarm Menu The ALARM MENU can be accessed anytime by pressing the ALARM key The main Alarm Screen includes the instructions for viewing and resetting the alarms as well as a means to access the Alarm History Screen Pressing the ENTER key while viewing the main Alarm Screen will reset any alarm that has returned to its safe state Please note that active alarms can only be reset ...

Page 12: ...12 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 56 5 10 ...

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