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Related Manuals for Orion GPC Plus Controller
Summary of Contents for Orion GPC Plus Controller
- Page 1 GPC Plus Controller General Information & Application Guide...
- Page 3 OE331-21-GPC GPC Plus Controller Description .20 Dia. Typ. of 4 6.2“ The OE331-21 General Purpose Con- troller Plus (GPC Plus) is used for con- trolling equipment or processes that cannot be controlled using HVAC con- COMM trollers. The Prism computer front end SHLD COM1-3 software is used to interface with the...
- Page 4 OE331-21-GPCPLUS All Communication Loop Wiring Is GPC Plus Controller Straight Through T To T, R To R, SHLD To SHLD Local Loop RS-485 COMM 9600 Baud Connect To 24VAC Power SHLD Next Device On For Relay Outputs The Local Loop COM1-3 5 Relay Outputs Are COMM...
- Page 5 ADDRESS This Switch Should Be In The OFF Position As Shown Note: The Power To The Controller Must Be Removed TOKEN And Reconnected After Changing The Address NETWORK Switch Settings In Order For Any Changes To Take Effect. Caution Disconnect All Communication Loop Wiring From The Controller Before Removing Power Controller From The Controller.
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Page 7: Main Status Screen
General Purpose Controller (GPCPlus ) January 31, 2005 Description The GPCPlus is a controller designed to “fill in the blanks” between standard off the shelf programs and minor non-standard applications. An example of a non-standard application might be exhaust fan control, based on building pressure or a simple boiler enable controller based on schedules or outdoor air temperature. -
Page 8: Analog Inputs
accesses the configuration for the selected item and a right click accesses the force mode options if any are available. Analog Inputs Relays Analog Outputs... - Page 9 Week Schedules & Holidays...
- Page 10 Analog Input Configurations The first five analog inputs and input #7 can be configured in several different ways. Input #6 can be used for Static Pressure and accepts the standard pressure sensor with the phone jack connector, available from WattMaster Controls. The following configurations are available: 1.
- Page 11 8. Read Global Binary Broadcast from another Controller 9. Sensor #6 can be assigned to read Static Pressure Each input is separately configured so combinations of any type of input on the same controller are possible. All readings can be overridden to specific values for test purposes. All thermister sensors can also be calibrated by entering positive or negative offsets to be applied to the current readings.
- Page 12 Any or all readings can also be “broadcast” to other controllers on the communications loop. For example, the Outdoor Air Temperature is broadcast on channel #2 by any unit that happens to have the sensor attached. If none of the standard package units have the outdoor air sensor attached, you could attach it to the GPCPlus and select it for broadcast on channel #2.
- Page 13 Each input can also have an appendix selected to display with the reading to make them more user friendly. The possible appendix values are: • (None) No Appendix Required • RH% Relative Humidity • % Percentage • °F Degrees Fahrenheit •...
- Page 14 Wall Sensor Slide Offset If you have configured a specific input to be connected to one of WattMasters’ standard OE212 or OE213 Flush Mount Wall Sensors which contain the optional slide offset, be sure to enter a value for “Maximum Slide Offset Effect”. This tells the controller how much effect to have on the selected setpoints when the slide is fully deflected up or down.
- Page 15 to 72.0°F. If the slide is pushed down, the Hi Limit Setpoint will drop to 70.0°F and the Lo Limit Setpoint to 68.0°F. Push-Button Override If you have configured a specific input to be connected to one of WattMasters’ standard OE211 or OE213 Flush Mount Wall Sensors which contain the optional push-button override, be sure to enter a value for “Push-Button Override Duration”.
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Page 16: Analog Input
Analog Input #6 This analog input is reserved for Duct Static Pressure. This value can then be used to monitor the duct static or to actually control the duct static using an analog output and driving either inlet vanes or a VFD controller. It is not recommended that you attempt to use relays to control the duct static pressure, although this reading can be selected as a control source on the relay configuration screen. -
Page 17: Relay Output Configuration
Relay Output Configuration Control Methods Each individual output relay can be configured separately for one of the following methods of control listed below. = Not Configured = On Above High Limit Setpoint and Off Below Low Limit Setpoint = On Above High Limit Setpoint and On Below Low Limit Setpoint = Off Above High Limit Setpoint and On Below Low Limit Setpoint = Off Above High Limit Setpoint and Off Below Low Limit Setpoint = On with Contact Closure on Selected Input... - Page 18 = Follow Global Binary Only = Ventilation Control = Lead Relay for Lead/Lag Control = Lag Relay for Lead/Lag Control Control/Reset Sources The Control Source is also selectable. This control source can be an analog value or an on/off contact closure. The list of possible sources is shown below. 0 = Not Configured 1 = Sensor Input #1 2 = Sensor Input #2...
- Page 19 such as outdoor air temperature. If no reset is required, simply enter the same values for the Control Source Hi and Lo Limit Setpoints. No Reset Source is required. If you do need the main Control Source Setpoint to reset, this is the range over which the Reset Source must change to cause the controlling setpoint to reset from the Lo Limit to the Hi Limit values you entered.
- Page 20 Run Time Alarm If the selected relay output is controlling a device that needs periodic maintenance, you can enter a Run Time Alarm Delay period that, once exceeded, generates an alarm condition that will notify the user when it occurs. If you need to protect the equipment you can select the Disable Relay box and the relay will de-activate once this run time has been exceeded.
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Page 21: Ventilation Control
Ventilation Control You can configure an output to operate in a ventilation control mode. This means that the output is active for the Vent Mode ON Time and then cycles off for the Vent Mode OFF Time. If the output is not enabled by a schedule or another relay, it will continue to cycle indefinitely at this On/Off rate. -
Page 22: Analog Output Configuration
Analog Output Configuration Two Proportional Outputs ( 0 - 10 VDC ) are available to the user. This output operates using standard floating point control or a modified Proportional/Derivative control as configured by the user. The controlling setpoint can be reset by any other sensor reading or the outdoor air temperature and the output voltage range can be limited by the user to some range other than the standard 0 - 10 VDC. -
Page 23: Pid Control
7 = Proportional Reset Signal 8 = Economizer Control 9 = Lead/Lag Pump VFD Control Possible Control Sources 0 = Not Configured 1 = Sensor Input #1 2 = Sensor Input #2 3 = Sensor Input #3 4 = Sensor Input #4 5 = Sensor Input #5 6 = Sensor Input #7 7 = Static Pressure... -
Page 24: Economizer Control
Economizer Control If you have configured the GPCPlus as a very simple Air Handling Unit, it has the ability to control the outside air dampers in a true first stage economizer cooling mode. This mode requires a Minimum Ventilation position that it maintains whenever the economizer is not enabled for cooling. - Page 25 Lead/Lag Pump VFD Control If you are using the GPCPlus as a Lead/Lag controller and you need to maintain loop pressure or some other analog signal, configure an output for this method of control. Then all you need to do is enter the control setpoint on the Lead Relay configuration screen and this output will attempt to modulate and maintain that level of control while the Lead/Lag control is active.
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Page 26: Sample Configurations
Sample Configurations Sample #1 The user would like to control 4 boilers. Each boiler is controlled from the same Water Temperature sensor but at a different temperature reading. Once a boiler is activated it must remain on at least 5 minutes and if a boiler is de-activated it must remain off at least 10 minutes. - Page 27 Analog Input #2 Configured as Outdoor Air Thermister Sensor Notice that we set this reading to broadcast on Global Analog Channel #2. That is because the Outside Air is normally read by one controller on a job and the remaining controllers look at Global Analog #2 for this value, including the GPC Plus.
- Page 28 Relay Output #1 Programming ( Used for Outdoor Air Enable / Disable ) NOTE: Nothing is physically connected to Relay #1. Its only use is to enable or disable the other relays.
- Page 29 Relay Output #2 Programming ( Used for Boiler #1 ) As you can see, the first boiler stage is enabled to operate if the water temperature is below 175°F and will remain on until it rises to 190°F. This first stage can only operate if the outdoor air enabling relay #1 is active.
- Page 30 Relay Output #3 Programming ( Used for Boiler #2 ) The second boiler stage is enabled to operate if the water temperature is below 170°F and will remain on until it rises to 180°F. The second stage can only operate if the first boiler stage relay #2 has been active for at least 5 minutes.
- Page 31 Relay Output #4 Programming ( Used for Boiler #3 ) The third boiler stage is enabled to operate if the water temperature is below 160°F and will remain on until it rises to 175°F. The third stage can only operate if the second boiler stage relay #3 has been active for at least 5 minutes.
- Page 32 Relay Output #5 Programming ( Used for Boiler #4 ) The fourth boiler stage is enabled to operate if the water temperature is below 150°F and will remain on until it rises to 170°F. The fourth stage can only operate if the third boiler stage relay #4 has been active for at least 5 minutes.
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Page 33: Operation
Operation Relay #1 enables the boilers to operate if the outdoor air temperature is below the low setpoint and the schedule is occupied. Each boiler is enabled to operate if the previous boiler is currently active and has been on for at least 5 minutes. All four boilers monitor the same analog input sensor for the Water Temperature reading. - Page 34 This next sample screen shows that the outdoor air temperature has dropped enough to enable the boilers to operate. The system has been running long enough to satisfy all 4 Boilers 5 Minute Starting delay so they are all active at this point. It took roughly 20 minutes to get all 5 relays active since each has a 5 minute Staging Delay time period.
- Page 35 Sample #2 The user would like to use the GPC Plus as a Lead/Lag Air Handling Unit Controller. The installation is located in a critical area that does not tolerate the space temperature going out of control. The method chosen was to install a backup AHU that would take over in case of failure on the Lead AHU.
- Page 36 back alarm condition because the Lead/Lag control should have already generated an alarm if something was wrong and the standby AHU was called into action. Be sure to check the Alarming Enabled box if you want this alarm to be reported back to the PRISM screen or to a Remote Pager.
- Page 37 Relay Output #2 Programming ( Used for Lag AHU Enable Signal ) There are no other settings required for the Lag Controller. All control logic from the Lead relay is used in the decision making process. Analog Outputs (No Analog Output Control is Required for this Program)
- Page 38 Main Status Screen ( Normal Operations ) As you can see on the Status Screen shown above, the unit is operating normally and the Supply Temperature is at 51.9°F, well within the normal operating range and no alarms are currently active. There are no schedules active since this unit is required to operate 24 hours a day.
- Page 39 Main Status Screen ( Failure Mode ) The Supply Air rose to 61.9°F and the Lag AHU was activated. The alarm screen indicates the Lead AHU failure.
- Page 40 Both AHU’s are now off because the Lag AHU failed to lower the Supply Air below 60°F.
- Page 41 The alarm screen indicates both outputs failed to control the Supply Temperature. At this point, the service personnel will need to correct the problem and then select the Reset Pump/Fan button to restart the GPC Plus Lead/Lag control sequence. Although the button and alarm indicators show Lead Pump / Fan indicators, the outputs are not limited to those types of control.
- Page 42 Form: OR-GPCPlus-APP-01A Printed in the USA March 2005 All rights reserved Copyright 2005 WattMaster Controls Inc. • 8500 NW River Park Drive • Parkville MO • 64152 Phone (816) 505-1100 www.wattmaster.com Fax (816) 505-1101...