Engineering Guide - Price Industries
Contents
1. Room Setpoint Cool Room Condition Warm Single Duct Cooling HCCO With Tri State Modulating Heat Max Heating Max Cooling N y lt S Min Heating Min Cooling Setpoint Cool Room Condition Warm Single Duct Cooling HCCO With Analog Modulating Heat N N Max Heating NER 4 Max Cooling Y DS D 4 SG N Be S G Min Heating Min Cooling Setpoint Cool Room Condition Warm Series Fan Powered and Electric Coil or Proportional Heat Continuous Fan Operation Max Heating Max Cooling Min Heating 2nd Stg X F Min Cooling Room Condition Warm PIC System Controls ENGINEERING GUIDE Applications Parallel Fan Powered and Electric or Proportional Heat When a variable volume terminal unit is used the fan is off when room temp is above the thermostat set point During these periods primary airflow modulates within the minimum and maximum limits based on the zone temperature If the zone temperature cannot be maintained by the fan alone heating coils will be energized When the zone temperature drops below the heating set point the fan is turned on When the zone temperature rises above the set point the fan is turned off In all cases the fan is subject to a minimum cycle time which is adjustable to prevent short cycling Night Setback Night setback provides a means of con2. For more information see the PRTU installation and service manual Network Compatibility Along withthe capability for independent control the PIC offers native BACnet MS TP compatibility enabling the package with an existing or future BACnet compli ant BAS network for maximum flexibility B BACnet network continues upup recommended 30 a devices www price hvac com PIC System Controls ENGINEERING GUIDE Typical Applications Single Duct Cooling or Heat Cool Changeover In this application the damper is modulated based on the zone temperature and duct air temperature with optional chaveover probe within the minimum and maximum airflow limits Sequence diagrams 2800 and 2850 Single Duct Cooling HCCO With 1 3 Stages of Electric Heat Inelectricheat applications the damper is modulated based on the zone temperature within the minimum and maximum airflow limits In this application up to three outputs perform staged on off control of the heat Each stage is energized independently based on the heat requirement Sequence diagrams 2801 2802 2851 and 2852 Single Duct Cooling HCCO With Tri State Modulating Heat In tri state modulating heat usually hot water applications both the damper and the hot water valve are modulated based on zone temperature PI control sends a corresponding clockwise CW or counter clockwise CCW signal to a tri state actuator positioning the valve One 1 stage of
3. Master Slave Token Passing MS TP MS TP stands for Master Slave Token Passing which is a robust low cost strategy for networking controllers BACnet MS TP uses the RS 485 standard which uses 1 pair 2 wires and a shield The network wire is connected in a daisy chain configuration to each controller Typically the terminals are labeled plus and minus but sometimes can be labeled A and B MS TP is much more robust and economical than Ethernet For example Ethernet can only be run a maximum of 330 feet without a repeater while RS Network Diagram Security System Hr 485 MS TP can theoretically be run up to 4000 feet without a repeater Presently it is not cost effective to put Ethernet on each device Once a network of controllers is setup using MS TP the network segment is typically connected to a computer running a graphical software package sometimes referred to as a front end The software package graphics can typically show all networked controllers and their variables trend log and schedule devices and objects This allows for energy savings and easier setup and maintenance of the system See the Price Rooftop Unit Controller PRTU brochure for more information Available at www price hvac com PIC and PRTU The PIC can be used in conjuction with the Price Rooftop Unit Controller PRTU This allows for polling of each zone s demand so that intelligent decisions can be made by the rooftop controller
4. Engineering Guide Price Intelligent ER Controller PIC PIC System Controls ENGINEERING GUIDE Contents PERO CUI ee EEE EE NE EEE EE 3 MERE 4 5 TN ee ee 5 Room Sensor Thermostat PIC TS SENS M dsssseeeneeeeeeek ett k kk LEE ERE RENEE ERE ERE ERE TERRE REESE REE E REE ERE anne nevn nennen 5 DialThermostat PIC TS DIAL ae nennen 5 LCD Thermostat PICTS LED use a een 5 LCD Thermostat with Motion Sensor PIC TS MOTION zu 5 Wireless PAN Seed etg 5 Optional Expansion Modules nenne ee 6 BACnet Module PIC BAD Lavere 6 VAV Module NNN 6 Install au ONT hd SEA ee 6 TRE EN ae ER OE EE EN ee rnlee 6 Installing a Thermostat ee ee ee er pe 6 ETEN ee Eee 7 BNP 7 VAV Pressure Independent vs VVT Pressure Dependent rrnunnnnnnnnrnnnnnennnnnennnnnennnnnrennnnsennnnnennnnnsennnnnene 7 Feld VS Factory NNN nee ee De ee een nee 7 Cooling Only vs Heating Cooling Changeover HCCO 222222220 22200800 te kk LEE nnnnnnnnnnnnnnnnnnnnnnn nennen nennen 7 NOON ONKO MERE EEE EEE EE EEE EE SEE 8 AE os APP FE eg EE EN DR 9 Single Duct Cooling or Heat Cool Changeover rrrrarrrnnnrvnnnnvnnnnennnnrnnnnrnnnnnennnsnnnnrennnsnnnnnennnnennnnrnnnnsennnrennusennn 9 Single Duct Cooling HCCO with 1 3 Stages of Electric Heat rrrnnnnrennnnnennnnnnnnnnnnnnnnnnnnnnnnennnnnennnnnrnnnnneennnn 9 Single Duct Cooling HCCO with Tri State Modulating Heat rrrnnnnnnnnnnnnnnnnnrnnnnnnnnnnnnnnnnnnennnnnennnnnennnnneennnn 9 Single Duct Cooling HCCO wi
5. Improvement is a continuing endeavour at Price Therefore specifications are subject to change without notice Consult your Price Sales Representative for current specifications or more detailed information Not all products may be available in all geographic areas All goods described in this brochure are warranted as described in the Limited Warranty shown at the web site www price hvac com The Price catalog is available online at www price hvac com Grilles amp Diffusers Gritical Environments Terminals amp Controls Sustainable Building Noise Control www price hvac com Q Price is a registered trademark of Price Industries Limited O 2012 Printed in Canada 2012 v001
6. VAV 2805 Pressure Independent Cooling or HCCO 0 10V HW or Analog heat Field Wired PIC 0 10V External VAV 2850 Pressure Dependent Cooling or HCCO eee ff 2851 Pressure Dependent Cooling or HCCO up to 3 stg Electric Heat Factory Wired PIC EC 2852 Pressure Dependent Cooling or HCCO 24VAC up to 3 stg Electric Heat Field Wired PIC Binary External 2853 Pressure Dependent Cooling or HCCO HW or Tri State modulating HW heat Field Wired PIC Tri State External 2854 Pressure Dependent Cooling or HCCO Analog electric heat Factory Wired PIC EC 2855 Pressure Dependent Cooling or HCCO 0 10V HW or Analog heat Field Wired PIC 0 10V External 6800 _ CV Pressure Independent CoolingorHeco Pc 6801 CV Pressure Independent Cooling or HCCO up to 3 stg Electric Heat Factory Wired PIC EC VAV 6802 CV Pressure Independent Cooling or HCCO 24VAC up to 3 stg Electric Heat Field Wired PIG Binary External VAV 6803 CV Pressure Independent Cooling or HCCO HW or Tri State modulating HW heat Field Wired PIC Tri State External VAV 6804 CV Pressure Independent Cooling or HCCO Analog electric heat Factory Wired PIC EC VAV 6805 CV Pressure Independent Cooling or HCCO 0 10V HW or Analog heat Field Wired PIC 0 10V External VAV 6850 CV Pressure Dependent Cooling or Heco Pe 6851 CV Pressure Dependent Cooling or HCCO up to 3 stg Electric Heat Factory Wired PIC EG 6852 CV Pressure Dependent Cooling or HCCO 24VAC up t
7. C Binary PWM Analog 2 10V 0 10V etc e 24 VAC binary switched outputs field switchable between hot and common e Analog 0 10 VDC outputs fully configurable for heating cooling fan and auxiliary e VAV module optional provides airflow sensing for true VAV control e BACnet module optional provides a native BACnet MS TP interface Thermostat Options Room Sensor Dial Thermostat LCD Thermostat LCD Thermostat Wireless Dial Thermostat PIC TS DIAL PIC TS LCD with Motion Sensor Thermostat PIC TS SENS PIC TS MOTION Room Sensor Thermostat PIC TS SENS This economical model of thermostat measures room temperature The setpoint can be set from a hidden dial on the back of the I Stat through free setup software or through a BACnet system This eliminates the problem of unauthorized tampering without the need for visually unappealing thermostat lock boxes Dial Thermostat PIC TS DIAL This model measures room temperature and features a dial adjustment and an occupancy button Temperature set point limits are set through software BACnet LCD Thermostat PIC TS LCD This model measures room temperature and features an LCD screen with an advanced menu structure and 3 pushbuttons Temperature set point limits are set through software BACnet Balancing and modification to the controller setup can be accomplished from the LCD screen LCD Thermostat with Motion Sensor PIC TS MOTION This model possesses the same features as the LC
8. D T Stat with the addition of a passive infrared motion sensor The motion sensor allows for automatic detection of space occupancy and therefore can save energy by shutting down during unoccupied periods Wireless Dial Thermostat This model allows you to place the thermostat in any location including glass walls cement walls etc No wiring needed for the remote Dial thermostat A local indicator LED shows battery life when pressed www price hvac com 5 PIC System Controls ENGINEERING GUIDE Optional Expansion Modules BACnet Module PIC BAC With native BACnet MS TP compatibility the PIC can tie into an existing or future BACnet compliant BAS system for maximum flexibility When connected the network monitors all of the controller sfunctions and variables assigns set points and initiates occupied unoccupied and night setback modes taking advantage of the level of control and visibility inherent to BAS systems A computer on the BACnet network can also be used to configure the PIC instead of using the keypad on the LCD T Stat Each PIC on the BACnet network can relay data containing a variety of setup and room condition information This can be read by other controllers such as the Price PDRC rooftop controller allowing for intelligent decisions to be made at the air supplier level See the PDRC Engineering Guide for more information VAV Module PIC VAV The VAV module increases the PIC s functionality by addin
9. IC is a Direct Digital Controller DDC The PIC offers many advantages over the older analog electronic style controllers 1 Full tunable Proportional Integral control for fast accurate control with little overshoot 2 Digital thermostats with setup and balancing functions 3 Multiple customizable outputs Binary and Analog 4 Native BACnet module for interface to building automation and polling systems 5 Sequence of operation changeable in the field if required PIG Features The Price Intelligent Controller comes with the Price Intelligent Controller PIC following standard features e Stand alone or BACnet network operation with the optional BACnet expansion module e Integrated actuator e Service port on all thermostat models provides a computer interface using the Price USB LINKER for setup balancing when LCD thermostat is not available sufficient eA range of thermostat options from a room sensor thermostat up to a motion controlled LCD thermostat eExpansion modules add additional functionality when required 4 www price hvac com PIC System Controls ENGINEERING GUIDE e Fast and error proof RJ 45 thermostat connections e LED s on the PIC indicate the status of all outputs aiding with troubleshooting e Adjustment of sequence parameters settings and balancing are possible from the password protected service menu of LCD thermostats e A variety of Heat control interfacing is available 24 VA
10. Tri State External 8854 VV Pressure Dependent Cooling or HCCO Analog electric heat Factory Wired PIC EC 8855 VV Pressure Dependent Cooling or HCCO 0 10V HW or Analog heat Field Wired PIC 0 10V External Notes VV is Variable Volume HCCO is Heating Cooling Changeover cool or warm air suppled to terminal External means reheat external to the terminal non box mounted i e Perimeter Radiation etc NSB is Night Setback www price hvac com 13 PIC System Controls ENGINEERING GUIDE Notes 14 www price hvac com PIC System Controls ENGINEERING GUIDE Notes www price hvac com 15 price NDUSTRIES 2975 Shawnee Ridge Court Suwanee Georgia USA 30024 Ph 770 623 8050 Fax 770 623 6404 rice INDUSTRIES 1290 Barrow Industrial Parkway Winder Georgia USA 30680 5704 rice INDUSTRIES 999 North Thornton Road Casa Grande Arizona USA 85122 3809 rice INDUSTRIES 638 Raleigh Street Winnipeg Manitoba Canada R2K 3Z9 Ph 204 669 4220 Fax 204 663 2715 price NDUSTRIES 130B Pippin Road Vaughan Ontario Canada L4K 4X9 U S Head Office Price Technical Center Atlanta Manufacturing Facility Atlanta Manufacturing Facility Price Technical Center West Phoenix Manufacturing Facility Canadian Head Office Price Research Center North International Sales Office Winnipeg Manufacturing Facility Toronto Manufacturing Facility Product
11. additional 24VAC binary heat can also be used Sequence diagrams 2803 2853 Single Duct Cooling HCCO With Analog Modulating Heat In modulating heat usually hot water or SCR electric applications both the damper andthe hot water valve are modulated based on zone temperature PI control determines the desired valve position or SCR heat level and sends a corresponding 0 10V DC signal to the motorized actuator or SCR heater controller Sequence diagrams 2804 2805 2854 and 2855 Series Fan Powered and Electric Coil or Proportional Heat In constant volume applications the fan operates continuously during occupied periods The primary flow is modulated between the minimum and maximum cooling set points based on the thermostat demand When the zone temperature falls below the zone set point the stages of heat will be energized During unoccupied periods the primary air system is off and the fan runs intermittently to maintain the zone temperature between the night set points If zone temperatures can not be maintained by the fan alone heating coils will be energized www price hvac com Single Duct Cooling or Heat Cool Changeover a Max Heating 4 Max Cooling Min Heating Min Cooling Setpoint Cool Room Condition Warm Single Duct Cooling HCCO With 1 3 Stages of Electric Heat _HeatOn _ B KA Max Heating Ss KOM Ss S Max Cooling K Min Heating Min Cooling
12. and BACnet network The PIC is designed with a modular architecture Options such as BACnet networking and airflow sensing are offered as add on modules This allows flexibility to the customer by providing both value in the core controller as well as powerful control and communication options with the use of the expansion modules Any PIC ordered with either the BACnet or Pressure Independent Control options will ship with the appropriate modules installed and mounted Modules may also be field mounted and connected to the PIC with a single ribbon type cable The PIC is available with several thermostat options allowing the designer to match the specific needs of the customer Every model of thermostat has an RJ 12 service port allowing setup and configuration access without having to access the plenum www price hvac com Price Intelligent Controller with VAV and BACnet modules Price Intelligent Controller with Dial and LCD motion thermostats PIC System Controls ENGINEERING GUIDE Introduction The price LINKER2 setup tool combined with FREE software can be used to reconfigure the PIC from this service port stand alone setup tool LCD SETUP is available Alternative methods of reconfiguration include the LCD thermostats BACnet software see page F2 21 for more information on setup tools BACnet network LINKER2 interface and software for local setup DDC vs Analog Electronic Contols The P
13. g pressure independent air flow control The airflow transducer contained in this module used in conjunction with Price s SP300 flow sensor provides consistent highly accurate readings These readings are not affected by mounting direction Installation and Setup Installation and configuration of the PIC is easy All wiring terminals are of the pluggable type allowing the contractorto make connections quickly and easily Thermostat and BACnet network connections are made using modular RJ 45 connectors Plenum rated and factory tested RJ 45 cables are provided by Price where required The PIC comes factory calibrated and mounted to Price VAV boxes but may also be ordered stand alone for retrofit jobs Installing the PIC 1 Mountthe controller onto the duct with the damper shaft going through the PIC s actuator Tighten the screws on the actuator 2 Secure the back end of the controller using the supplied anti rotational bracket 3 Connect any of the controller s outputs as required 4 Power the PIC using 24 VAC BACnet Module PIC BAC VAV Module PIC VAV Thermostat Back View Price Intelligent Controller 35 Plenum Cable Included Set Screw for locking thermostat 0 050 Allen Key Installing a Thermostat 1 Install the thermostat back plate to a standard electrical box or directly to drywall using anchors supplied by others 2 Connect the I Stat to the PIC s I Stat jack using the suppl
14. ied plenum rated modular network type cable 3 Clip the thermostat onto the back plate and tighten the set screw www price hvac com PIC System Controls ENGINEERING GUIDE Setup of the PIC The PIC comes pre calibrated from the factory However if field conditions require readjustment the Service Maintenance personal may change PIC settings There are several ways to access setup variables in the PIC 1 Through the password protected menu structure built into the LCD thermostats 2 Through the BACnet network for controllers ordered with the BACnet option or those with the BACnet module field installed 3 Through the service jack located on the bottom of each thermostat and the Price LINKER2 The LINKER2 is a USB 2 0 interface to Price controls It is used in conjunction with FREE setup and balancing software available from Price 4 Using the stand alone setup tool LCD SETUP This special setup tool resembles the LCD thermostat in both appearance and menu function It can be plugged into either the DialThermostat or the Room SensorThermostat and used to setup the controller when a computer is not available Typical Application Overview The PIC can be factory configured to any one of more than 35 standard sequences as well as special sequences if required There are three categories of sequences Single Duct Constant Volume Fan Powered series box and Variable Volume Fan Powered parallel box Each of
15. o 3 stg Electric Heat Field Wired PIC Binary External 6853 CV Pressure Dependent Cooling or HCCO HW or Tri State modulating HW heat Field Wired PIC Tri State External 6854 CV Pressure Dependent Cooling or HCCO Analog electric heat Factory Wired PIC EG 6855 CV Pressure Dependent Cooling or HCCO 0 10V HW or Analog heat Field Wired PIC 0 10V External 8800 WV Pressure Independent CoolingorHeco Pc w gt AV 8801 VV Pressure Independent Cooling or HCCO up to 3 stg Electric Heat Factory Wired PIC EC V 12 www price hvac com PIC System Controls ENGINEERING GUIDE PIC Table of Se quence Diac Number Sequence Description 8802 VV Pressure Independent Cooling or HCCO 24VAC up to 3 stg Electric Heat Field Wired Binary External VAV 8803 VV Pressure Independent Cooling or HCCO HW or Tri State modulating HW heat Field Wired PIC Tri State External VAV 8804 VV Pressure Independent Cooling or HCCO Analog electric heat Factory Wired 8805 VV Pressure Independent Cooling or HCCO 0 10V HW or Analog heat Field Wired ms 10V External 8850 VV Pressure Dependent Cooling or HCCO 8851 VV Pressure Dependent Cooling or HCCO up to 3 stg Electric Heat Factory Wired PIC EG 8852 VV Pressure Dependent Cooling or HCCO up to 3 stg Electric Heat Field Wired PIC 24VAC Binary External 8853 VV Pressure Dependent Cooling or HCCO HW or Tri State modulating HW heat Field Wired PIC
16. oard heat or hot water valves either mounted to the terminal or externally These must be wired to the controller s outputs during installation in the field Cooling Only vs Heating Cooling Changeover HCCO All PIC sequences are designed for both cooling only applications where only cool air is supplied to the terminal and for HCCO applications where both warm or cool air can be supplied to the box The optional changeover probe PIC PRB allows HCCO operation If no probe is connected to the PIC the controller assumes it is receiving cool supply air and acts accordingly Options There are several optional that are available on every sequence 1 BACnet network interface A BACnet MSTP interface to connect to a BACnet BMS network 2 Changover probe Asupply airtemperature sensor required for heating cooling changeover systems 3 Thermostats Four models of thermostats are available for every PIC sequence PIC System Controls ENGINEERING GUIDE Networking With native BACnet MS TP compatibility the PIC can tie into an existing or future BACnet compliant BAS system for maximum flexibility When connected the network monitors all of the controller s functions and variables assigns setpoints and initiates occupied unoccupied and night setback modes taking advantage of the level of control and visibility inherent to BAS systems Acomputer running BACnet communication software can connect to each controller
17. sensor optional Thermostat inputs e Room setpoint dial e Temperature sensor 10K Type J thermistor o Accuracy of 0 5 F from 55 F to 85 F 0 25 C from 13 C to 25 C Communication ports BACnet MS TP Connection optional e Communication speeds 9 600 19 200 38 400 76 800 default e Maximum recommended nodes per MS TP segment 30 LINKER2 port e For local setup using Price LINKER2 Actuator Specifications 35 in Ibs nominal torque 90 seconds running time 90 maximum angle of rotation External slide knob for manual override Less than 35 db A noise level Airflow Sensor Specifications Optional 0 1 SLM flow sensor 0 1 W C equivalent Tubing Specifications Flow Sensor tubing must be 1 4 inch outside diameter Size Weight 11 x 5 75 x 2 75 1 81b 8169 www price hvac com 11 PIC System Controls ENGINEERING GUIDE PIG Table of Sequence Diagrams Number Sequence Description Controller Reheat Required Accessories 2800 Pressure Independent CoolingorHcco Pc 2801 Pressure Independent Cooling or HCCO up to 3 stg Electric Heat Factory Wired PIG EG VAV 2802 Pressure Independent Cooling or HCCO 24VAC up to 3 stg Electric Heat Field Wired PIC Binary External VAV 2803 Pressure Independent Cooling or HCCO HW or Tri State modulating HW heat Field Wired PIG Tri State External VAV 2804 Pressure Independent Cooling or HCCO Analog electric heat Factory Wired PIC EC
18. serving energy by changing the temperature setpoints In the unoccupied hours when environmental requirements are reduced By default PIC controllers with any sequence can enter night setback Sequence 9999 details night setback operation and how a controller may enter or exit night setback Typically the heating set point will be reduced to 62 F The primary trigger for the PIC to enter night setback mode is primary airflow failure This will occur when the main fan is shut down The heating set point is then automatically changed to a configurable night set point 62 F by default If the room temperature falls below the heating set point the box s auxiliary heat willbe energized While inthe night setback condition the box damper is parked slightly open in order to sense the return of primary airflow at which point the PIC will automatically return to normal operation See sequence 9999 for more details PIC and SCR Silicon Controlled Rectifier The PIC outputs an analog 0 10V signal for heat applications For the electric heat this signal would be tied directly into a SCR device which provides modulation of an electric duct heater or an electric perimeter heater This configuration allows full 0 100 control of the electric heater ensuring that the room set points are accurately met without overshoot This method of control is much more accurate than standard on off digital or staged control Benefits of SCR control eEnerg
19. th Analog Modulating Heat rrnnnnnnnnnnonnnnnnnnnnnrnnnnnnnnnnnnnnnnnnnnnnnnennnnnrnnnnnrennnn 9 Series Fan Powered and Electric Coil or Proportional Heat 2z4u02220208002800n0n0n0nnnnn nun nun u nennen nennen 9 PFOS rate ER ae Re 10 Parallel Fan Powered and Electric or Proportional Heat 2zu0240200000002nnnnnonnn nun Rue nun nano nun anne nenn 10 I FIEBER rn tory onion TE Te TE EEE 10 PIC and SCR Silicon Controlled Rectifier ns 10 Benes OF SER CONO EEE ER 10 NNN 11 Appendix A Table of Sequence Diagrams 2 zu224202080208000nnonnnonnnnnnnnonnn nun REE REESE REEL ELERS REE nnnennnnn nenne nennen 12 13 2 www price hvac com PIC System Controls ENGINEERING GUIDE Introduction Direct digital control is a proven control technology that has traditionally been used in large scale building automation systems DDC has brought unprecedented control and efficiency to building ventilation The PIC combines the accuracy of direct digital control with the flexibility of an individual room system providing maximum control and efficiency The Price Intelligent Controller PIC is a cutting edge control package that offers a new level ofzone control An advanced and configurable proportional integral PI controller allows for exceptional user comfort and energy efficiency Installation of the controller and thermostat is simple and error proof with RJ 45 network type connections to the thermostat
20. these types have different options VAV vs VVT field wired vs factory wiring cooling only vs HCCO and various heat control types The following is a description of the different options VAV Pressure Independent vs VVT Pressure Dependent Variable air volume VAV control can maintain the conditions in a space more accurately This is due to pressure independence When the VAV module is present the PIC can maintain airflow at a constant volume independent of duct static pressure changes Variable Volume Temperature VVT is pressure dependant This is a more economical technology initial investment which will modulate the damper position and does not measure actual air volume entering the space Actual air volume will vary depending on duct static pressure and other variable All Pressure Independent VAV sequences start at 2800 6800 and 8800 depending on box type All Pressure Dependent VVT sequences start at 2850 6850 and 8850 Field vs Factory wiring Many sequences may appear to be the same with www price hvac com LCD Thermostats BACnet Module Price LINKER2 setup Tool simply the wiring type field vs factory changing A factory wired sequence is chosen if the terminal is to have a factory mounted electric duct heater installed In these cases the Price Factory will wire the PIC controller to the duct heater Field wired sequences are used with equipment such as perimeter radiation baseb
21. y efficient room set points are accurately maintained Undershoot and overshoot are minimized thereby increasing comfort while reducing operating costs eNoise reduction Mechanical contactors are eliminated Noise from contactor switching is completely eliminated resulting in silent operation e Increased Reliability The SCR is a solid state device with no moving parts to wear or break down 10 Parallel Fan Powered and Electric or Proportional Heat Max Heating Max Cooling Min Heating Min Cooling Setpoint Room Condition Warm Night Setback A Max Heating ax Cooling n Heating n Cooling Night Heat Night Cool Setpoint Setpoint Default 62 Default 85 Cool Room Condition Warm SCR Silicon Controlled Rectifier www price hvac com PIC System Controls ENGINEERING GUIDE Specifications PIG Power Requirements 24VAC 47 63 Hz 6 VA not including output loading NEC Class Il Price Intelligent Controller PIC Ambient Ratings 32 to 131 F 0 to 55 C 10 to 90 RH non condensing Outputs 24VAC Binary x7 Max 0 5Amps each MAX 1 85A total Switched HOT or Switched COMMON e Fan Stages of heat or heat open close x3 Cooling Damper CW Damper CCW Analog 0 10 VDC x4 Max 10mA each e Fan ecm e Heat e Cool e Aux Inputs Changeover sensor 10k Type J thermistor Contact closure night setback Airflow
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