Page 3 - Description; GPC Plus Controller
Form: ORION-OE331-21-GPCPlusController-01A.doc Page 1 of 1 Description The OE331-21 General Purpose Con-troller Plus (GPC Plus) is used for con-trolling equipment or processes thatcannot be controlled using HVAC con-trollers. The Prism computer front endsoftware is used to interface with theGPC Plus...
Page 9 - Week Schedules & Holidays
Page 14 - Wall Sensor Slide Offset; Note: There are separate outputs on the Flush Mount Wall Sensors
8 Wall Sensor Slide Offset If you have configured a specific input to be connected to one of WattMasters’ standardOE212 or OE213 Flush Mount Wall Sensors which contain the optional slide offset, besure to enter a value for “Maximum Slide Offset Effect”. This tells the controller howmuch effect to ha...
Page 15 - Optimal Start Temperatures
9 to 72.0°F. If the slide is pushed down, the Hi Limit Setpoint will drop to 70.0°F and theLo Limit Setpoint to 68.0°F. Push-Button Override If you have configured a specific input to be connected to one of WattMasters’ standardOE211 or OE213 Flush Mount Wall Sensors which contain the optional push-...
Page 17 - Control Methods
11 Relay OutputConfiguration Control Methods Each individual output relay can be configured separately for one of the followingmethods of control listed below. 0 = Not Configured 1 = On Above High Limit Setpoint and Off Below Low Limit Setpoint 2 = On Above High Limit Setpoint and On Below Low Limit...
Page 18 - Control/Reset Sources; Logical AND Source; Enabling Relay; Reset Source Limits; Hi Limit Setpoint
12 8 = Follow Global Binary Only 9 = Ventilation Control 10 = Lead Relay for Lead/Lag Control 11 = Lag Relay for Lead/Lag Control Control/Reset Sources The Control Source is also selectable. This control source can be an analog value or anon/off contact closure. The list of possible sources is shown...
Page 19 - Controlling Setpoint Deadband; deadband; Controlling Schedule
13 such as outdoor air temperature. If no reset is required, simply enter the same values forthe 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 con...
Page 20 - Run Time Alarm; period that, once exceeded, generates an alarm; Relay Output Type; or
14 Run Time Alarm If the selected relay output is controlling a device that needs periodic maintenance, youcan 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 equipmentyou can select the Disabl...
Page 21 - Ventilation Control
15 Ventilation Control You can configure an output to operate in a ventilation control mode. This means that theoutput is active for the Vent Mode ON Time and then cycles off for the Vent Mode OFFTime. If the output is not enabled by a schedule or another relay, it will continue to cycleindefinitely...
Page 22 - Possible Control Modes
16 Analog OutputConfiguration Two Proportional Outputs ( 0 - 10 VDC ) are available to the user. This output operatesusing standard floating point control or a modified Proportional/Derivative control asconfigured by the user. The controlling setpoint can be reset by any other sensor readingor the o...
Page 25 - Lead/Lag Pump VFD Control
19 Lead/Lag Pump VFD Control If you are using the GPCPlus as a Lead/Lag controller and you need to maintain looppressure 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 configurationscreen and this ou...
Page 26 - Sample Configurations; Configured as Thermister Type III Sensor
20 Sample Configurations Sample #1 The user would like to control 4 boilers. Each boiler is controlled from the same WaterTemperature sensor but at a different temperature reading. Once a boiler is activated itmust remain on at least 5 minutes and if a boiler is de-activated it must remain off at le...
Page 28 - Relay Output #1 Programming; NOTE: Nothing is physically connected to Relay #1. Its only use is to
22 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
23 Relay Output #2 Programming ( Used for Boiler #1 ) As you can see, the first boiler stage is enabled to operate if the water temperature isbelow 175°F and will remain on until it rises to 190°F. This first stage can only operate ifthe outdoor air enabling relay #1 is active. Once activated, the b...
Page 30 - Relay Output #3 Programming
24 Relay Output #3 Programming ( Used for Boiler #2 ) The second boiler stage is enabled to operate if the water temperature is below 170°F andwill remain on until it rises to 180°F. The second stage can only operate if the first boilerstage relay #2 has been active for at least 5 minutes. Once acti...
Page 31 - Relay Output #4 Programming
25 Relay Output #4 Programming ( Used for Boiler #3 ) The third boiler stage is enabled to operate if the water temperature is below 160°F andwill remain on until it rises to 175°F. The third stage can only operate if the second boilerstage relay #3 has been active for at least 5 minutes. Once activ...
Page 32 - Control Source; Not Configured
26 Relay Output #5 Programming ( Used for Boiler #4 ) The fourth boiler stage is enabled to operate if the water temperature is below 150°F andwill remain on until it rises to 170°F. The fourth stage can only operate if the third boilerstage relay #4 has been active for at least 5 minutes. Once acti...
Page 33 - Operation
27 Operation Relay #1 enables the boilers to operate if the outdoor air temperature is below the lowsetpoint and the schedule is occupied. Each boiler is enabled to operate if the previousboiler is currently active and has been on for at least 5 minutes. All four boilers monitorthe same analog input...
Page 35 - Configured as Thermister Type III Sensor to measure Supply Air
29 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 temperaturegoing out of control. The method chosen was to install a backup AHU that would takeover in case of failure on the...
Page 36 - The remaining inputs are not required for this program.
30 back alarm condition because the Lead/Lag control should have already generated analarm if something was wrong and the standby AHU was called into action. Be sure tocheck the Alarming Enabled box if you want this alarm to be reported back to the PRISMscreen or to a Remote Pager. Analog Input #2 -...
Page 37 - (No Analog Output Control is Required for this Program)
31 Relay Output #2 Programming ( Used for Lag AHU Enable Signal ) There are no other settings required for the Lag Controller. All control logic from theLead relay is used in the decision making process. Analog Outputs (No Analog Output Control is Required for this Program)
Page 38 - Main Status Screen
32 Main Status Screen ( Normal Operations ) As you can see on the Status Screen shown above, the unit is operating normally and theSupply Temperature is at 51.9°F, well within the normal operating range and no alarmsare currently active. There are no schedules active since this unit is required to o...
Page 39 - The Supply Air rose to 61.9°F and the Lag AHU was activated.
33 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.
