CM3500 Controller - ClimateMaster DOAS Water-Source Heat Pumps - Rev.
CAUTION CAUTION - ONLY TRAINED, QUALIFIED PERSONNEL SHOULD INSTALL AND/OR SERVICE CLIMATEMASTER EQUIPMENT. SERIOUS INJURY, DEATH AND PROPERTY DAMAGE CAN RESULT FROM IMPROPER INSTALLATION/SERVICE OF THIS EQUIPMENT. HIGH VOLTAGE ELECTRICAL COMPONENTS AND REFRIGERANT UNDER PRESSURE ARE PRESENT. LIMITED WARRANTY.
CM3500 Controller - ClimateMaster DOAS Water-Source Heat Pumps - Rev.
TABLE OF CONTENTS 1 - Installation........................................................................................................................................8 1.2 - Sensor Installation.............................................................................................................................8 1.2.1 - Duct-Mount Sensor..............................................................................................................8 1.2.2 - Remote Room Sensor(s).....................
- Digital Outputs (Binary)........................................................................25 2.3.1.4.4 - Analog Outputs....................................................................................26 2.3.1.4.5 - Room Sensor Data...............................................................................26 2.3.1.4.3 - Parameter Settings...............................................................................................................27 2.3.2.1 - Hot Gas Control.
3 - Hardware Details............................................................................................................................40 3.1 - Programmable Controller..................................................................................................................40 3.2 - Remote Terminal...............................................................................................................................40 3.3 - Remote Room Sensor............................................
1. - Installation 1.1 - Humidity and Temperature Control Package Your ClimateMaster controller is designed for precise monitoring and control of air temperature and relative humidity (RH) within a conditioned environment. This CM3500 control system is easy to install and operate. It features a wall-mountable remote display terminal which allows you to view and adjust set points and modes of operation. It also indicates the operating status of major components inside of the DOAS unit.
1.2.2 - Remote Room Sensor(s) ClimateMaster DOAS units ordered with the room reset of supply air temperature (RRSAT) option are supplied with a remote room sensor. Up to four of these sensors may be wired to the system. Figure 1 This wall-mountable display is an IP30 rated device. Ambient conditions must be between 32.0ºF and 120.0ºF and less than 85% RH. The controller’s RS485 serial interface communicates via three-way plug-in terminals. Use a twisted pair plus shielded cable, 20-22 AWG.
• Four-terminal valves have two terminals for 24 VAC power and two terminals for the signal input. • Three-terminal valves have one terminal for the “hot” 24 VAC input, a second terminal for the “positive” signal input and a third, common terminal for the “neutral” 24 VAC input and the “negative” signal input. You must follow the instructions included with the valve cut sheet. Observe the proper polarity or you may damage both the valve and the controller.
1.5.1 - Installing the Remote Terminal The remote terminal is an IP40 device and is powered through the cable provided. If a longer length is required, a standard 24 AWG, 6 conductor phone cable may be used up to 150 feet. For location of the sensor up to 1,500 feet, use 22 AWG, 3 twisted pair cable. See your wiring schematic for connection details. Pull the cord and connector through the hole in the back of the mounting bracket. Attach the bracket to the wall.
2 - IAQ Controller Details Figure 3 2.1 - Menu Overview and General Instructions Your ClimateMaster CM3500 Controller is pre-programmed and configured at the factory for use in the application you have specified. The remote terminal allows the operator to monitor the operation and adjust the setpoints of the DOAS unit. The remote terminal has an LCD screen and 6 keys.
2.2 - Main Menu Pressing the Esc key from the Home Screen displays the MAIN MENU. This menu allows the operator to modify the TEMPERATURE SETTINGS set a Temporary Occupancy, change the Occupancy Schedule and view the Unit Revision. To return to the Home Screen, press the Esc key. Figure 4 2.2.1 - Temperature Settings The temperature settings for your unit can be modified from this menu. Select the appropriate item with the UP and DOWN keys and press the ENTER key to select.
2.2.1.1 - Supply Air Temperature Setpoint This screen will only be shown if the room reset of leaving air temperature (RRLAT) option is not selected. This screen allows the supply air temperature setpoint to be modified. The value of the setpoint ranges from 45.0ºF to 99.9ºF with a 72.0ºF default. To modify the setpoint, press the ENTER key and use the arrow keys until the desired setting is shown. Pressing the ENTER key will now change the setpoint.
Figure 7 2.2.1.3 - Operation of the Remote Room Sensor The remote room sensor supplied with the RRLAT option will allow modification of the Zone Air Setpoint. This can only be changed on the remote room sensor assigned as address 2. Pressing the UP or DOWN buttons will display and flash the current setpoint. Pressing the UP or DOWN buttons again will change the setpoint in 0.1ºF increments. Pressing and holding down these buttons will allow for a faster scroll of the setpoint.
now be occupied for one hour. Pressing the button multiple times will allow for up to nine hours of occupancy. To cancel the occupancy set from the remote room sensor, simply press the SLEEP button again, or set the hours to zero. When the crescent moon icon disappears, the occupancy override is cancelled. The bottom left button on the remote room sensor flips the large temperature and small humidity display to the large humidity and small temperature display for a few seconds.
2.2.3 - 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 schedule and allow the unit to be temporarily occupied. The screen will now show “Override On.
2.2.4.1 - Schedule Options This screen selects the number of occupancy schedules to be active. Setting at least one allows the occupancy schedule timing to be set from the Current Schedule Screen. If the number of active schedules is left at zero, no occupancy scheduling will be active. To return to the OCCUPANCY SCHEDULE MENU, press the Esc key. Figure 12 2.2.4.1.1 - Current Schedule This screen sets the occupancy timing for the selected day of the week (DOW) at the bottom of the screen.
2.2.4.2 - Temporary Holidays The Temporary Holiday settings are for holidays that change dates from year to year, such as Memorial Day or Thanksgiving. Up to 10 different temporary holidays 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. To return to the OCCUPANCY SCHEDULE MENU, press the Esc key. Figure 14 2.2.4.
2.2.4.4 - Set Time This screen allows the time, date and day of week to be set. To modify these settings, press the ENTER key until the cursor is over the appropriate item and use the arrow keys until the desired setting is shown. All times are set in the 24 hour format. Pressing the ENTER key will step to the next item. If any item was modified, the message “Enter to Set” will be shown. Press the ENTER key to change the time and date. To return to the OCCUPANCY SCHEDULE MENU, press the Esc key.
Figure 18 2.3 - Service Menu Selecting the SERVICE MENU will display the Login Screen. Enter the service password, 1234, and press ENTER. The SERVICE MENU allows the Unit Status, Parameter Settings, Sensor Offsets and Pressure Cutouts to be accessed. To return to the Unit Revision Screen, press the Esc key. The password is bypassed for 5 minutes after it is first entered. This is displayed on the Login Screen with the text, “Still Logged In, Press PRG to Enter.
2.3.1 - Unit Status Selecting Unit Status from the MAIN MENU allows for the Modes & Time, Outside Air Dewpoint, Outside Air Temperature and I/O Status to be accessed. To return to the SERVICE MENU, press the Esc key. Figure 20 2.3.1.1 - Modes & Time Selecting Modes & Time from the SERVICE MENU displays a text explanation of the unit. The Occupied mode either Occupied or Un-Occupied is shown as well as the unit status.
2.3.1.2 - Outside Air Dewpoint The factory set Outside Air Dewpoint Setpoint and Deadband can be modified on this screen. The factory setpoint for the Dewpoint and Deadband is preset before the controller is shipped. Modification to these settings should only be done by a trained technician. To modify these setpoints, press the ENTER key until the desired setpoint is selected and use the arrow keys until the desired setting is shown. The range of the Outside Air Dewpoint is 0.0º to 99.
2.3.1.4 - I/O Status Selecting the I/O Status from the SERVICE MENU allows for the Digital Inputs, Analog Inputs, Digital Outputs, Analog Outputs and Room Sensor Data display. To return to the Unit Status Screen, press the Esc key. Figure 24 2.3.1.4.1 - Digital Inputs (Binary) The Digital Inputs Screen will show the state of the contacts wired into the port J5 of the controller. This screen is provided for troubleshooting of the control system.
2.3.1.4.2 - Analog Inputs The Analog Inputs Screen shows the current readings of the Suction Pressure, Discharge Pressure, Outside Air Humidity, Outside Air Temperature and the Supply Air Temperature. If your unit comes standard with dual refrigerant circuits, the Suction Pressure and Discharge Pressure of circuit B is also displayed. This screen is provided for troubleshooting of the control system. To return to the I/O Status Screen, press the Esc key. Figure 26 2.3.1.4.
2.3.1.4.4 - Analog Outputs The Analog Output Screen shows the current readings of the Hot Gas Command on Y1 and the Auxiliary Heating Command on Y2. If your unit comes standard with a heat wheel VFD for freeze protection, then the VFD Command is shown on Y3. This screen will also show the Supply Air Temperature or the Zone Temperature since it relates to the Hot Gas and Auxiliary Heat Commands. The calculated Dewpoint is also shown on this screen.
2.3.2 - Parameter Settings Selecting the Parameter Settings from the SERVICE MENU allows for the Hot Gas, Auxiliary Heat, Unoccupied Deadbands, Zone Reset and Heat Wheel control parameters to be accessed. To return to the SERVICE MENU, press the Esc key. 2.3.2.1 - Hot Gas Control This screen allows the Hot Gas PI Gain (or Proportional Band) and Reset (or Integral) to be modified for loop tuning. The range of the Gain is from 0.0º to 999.9ºF. The range of the Reset is 0.0° to 999.9° F.
2.3.2.3 - Unoccupied Deadbands This screen will only be shown if the Unoccupied Control is selected in the Factory Configuration Screen. These deadbands will only be used in the unoccupied mode. The Cooling and Heating Deadband is used to prevent short cycling and is added to the Cooling Setpoint and subtracted from the Heating Setpoint. The Humidity Deadband is added to the Setpoint. To modify the Deadbands, press the ENTER key and use the arrow keys until the desired setting is shown.
2.3.2.5 - Heat Wheel Control Setpoints (Figure 36) This screen will only be shown if the Heat Wheel VFD option is selected in the Factory Configuration. This screen allows modification of the Heat Wheel PI Gain (or Proportional Band) and Reset (or Integral) for loop tuning. It also allows for modifying the Heat Wheel Humidity Setpoint, as well as displaying the Heat Wheel Humidity from the internal humidity sensor. The range of the Gain is from 0.0% to 99.9%. The range of the Reset is 0.0º 999.9º F.
2.3.3 - 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 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.
2.3.5 - Glycol Ratio This screen will only be shown if the unit is set as a heat pump in the Factory Configuration. This screen allows modifying the percent of glycol in the water. The range of the setpoint is from 0% to 30% of glycol in the water. To modify this setpoint, press the ENTER key and use the arrow keys until the desired setting is shown. Pressing the ENTER key will now change the setpoint.
2.4.1 - Refrigerant This option toggles between R-22 and R-410A to modify the High and Low Pressure Trip Points the compressor uses. To select this option, press the ENTER key and use the arrow keys until the desired setting is shown. The ENTER key will step to the next option. To return to the UNIT REVISION MENU, press the Esc key. 2.4.2 - Set as Heat Pump Selecting this option to “On” will allow the unit to be used as a heat pump.
2.4.6 - Heat Wheel VFD Selecting this option to “On” will allow analog output #3 (Y3) to control the Heat Wheel VFD to prevent freezing. To select this option, press the ENTER key and use the arrow keys until the desired setting is shown. The ENTER key will step to the next option. To return to the UNIT REVISION MENU, press the Esc key. 2.4.7 - Dual Refrigerant Circuits Selecting this option to “On” will allow the use of the second refrigerant circuit on larger units.
2.4.9 - Building Automation Communications This screen allows the Building Automation Communications setting to be modified. The communication type can be selected as 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.
2.5 - Alarm Menu 2.5.1 - Alarm Screen The ALARM MENU can be accessed anytime by pressing the ALARM button. The main alarm page includes the instructions for viewing and resetting the alarms, as well as a means to access the alarm history page. Pressing the ENTER button while viewing this 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.
A special case of the Low Suction Pressure Alarm activating is when the unit is selected as a heat pump and the compressor is used for heating. In this case, the Low Suction Pressure Setpoint is determined by the glycol ratio setting in the service setpoints. The Calculated Suction Pressure Setpoint is shown as well as the Loop Temperature Limit. In this state, the unit will stop and not restart until the suction pressure rises 20 psi above the Low Suction Pressure Trip Setpoint.
2.5.5 - Multiple Low Pressure in Heat Pump Mode This alarm is active only in the special case for the Low Suction Pressure Alarm. If the unit is selected as a heat pump and the compressor is used for heating, and the low suction pressure alarm occurs 3 times in any one hour period, this alarm will be active. In this state, the unit will stop and not restart until the alarm condition is reset manually on the Alarm Screen. The red ALARM LED on the display will stay lit until the alarm is reset.
2.5.9 - Supply Air Temperature Sensor Failure The Supply Air Temperature Sensor Failure will be active if the supply air temperature sensor is in a shorted or open condition. In this state, the unit will stop and not restart until the alarm condition is cleared. The red ALARM LED on the display will stay lit until the alarm is acknowledged, even after the alarm condition is cleared to alert the operator the alarm occurred. 2.5.
Up Button Sleep Button Down Button Figure 47 2.6 - Remote Room Sensor Configuration (Figure 47) For zone reset controlled dehumidifiers, a sensor in the conditioned space is required. The remote sensor is used with the CM3500 to accomplish this. The remote room sensor is available as a temperature sensor to reset the supply air setpoint based on the conditioned space temperature. It is also available as a temperature and relative humidity sensor.
3 - Hardware Details 3.1 - Programmable Controller The programmable controller is preprogrammed by ClimateMaster for the control of your unit. Two types of controllers are used. The small unit is used for all single refrigeration circuit units and most dual refrigeration circuit units. A medium unit is required on units with a dual refrigerant circuit and/or if a VFD is used to prevent freezing of a heat wheel.
The suction pressure transducer’s replacement part number is available from ClimateMaster by calling our customer service department. 3.5 - Discharge Pressure Transducer The discharge pressure transducer is a 0.5 - 4.5 VDC to 0 - 652 psig ratiometric device. The body is brass with a ¼ SAE female refrigerant connection. This transducer must be supplied with 4.5 to 5.5 VDC power. A display reading of 0.0 psig for the transducer indicates the device is disconnected or defective.
IOM Revision Log: Date Page # Description 7 Oct, 2008 38 Air Filter Service Required Section Added 7 Oct, 2008 39 Remote Room Sensor Configuration Section Added 7 Oct, 2008 29 Heat Wheel Control Setpoints Section Added 30 April, 2008 5-7, 11 Verbage Changes 28 April, 2008 First Published BR I HE AT P U M P S R ST AND 3 ARD 1 6 -1 IS O R AI A TO NE WATER TO IFIED TO ARI A RT S C CE NG WITH LYI MP O IR MANUFACT UR ER All 25 *97B0003N11* 7300 S.W.