INTRODUCTION & OVERVIEW

Transcription

1 INTRODUCTION & OVERVIEW CONTENTS INTRODUCTION THEMERIDIANCONCEPT...2 TYPICAL BUILDING FOR MERIDIAN CV SYSTEM TYPICAL BUILDING FOR MERIDIAN CV-EX SYSTEM. 4 ADDONDEVICES...14 MERIDIANVIEWSOFTWARE...18 FEATURESANDBENEFITS...20 NON-PROPRIETARY...20 PRE-ENGINEERED / APPLICATION SPECIFIC ONE SYSTEM FOR BOTH ZONED & SINGLE ZONE SYSTEMS EASY TO CONFIGURE USERFRIENDLYSETUP...20 TRUENETWORKCOMMUNICATIONS...20 HIGHINTEGRITYCOMMUNICATIONS...20 MICROPROCESSOR CONTROLLERS OPERATORS INTERFACE...20 MEMORYBACKUP...20 MODULATING, HEAVY DUTY ACTUATORS WITH REALTIMEFEEDBACK...20 PATENTEDROOMSENSORS...20 MODULARCONNECTIONS...21 FREE! WINDOWS COLOR GRAPHICS SOFTWARE...21 OPENPROTOCOL...21 MERIDIAN ZONE CONTROL FEATURES SUMMARY MERIDIAN SYSTEMS PROVIDE APPLICATION NOTES: DESIGNING A SUCCESSFUL ZONING SYSTEM APPLICATION NOTES: ZONINGISNOTTRUEVAV...22 NOTE: Dec. * Meridian-Plus 03/16/99 03:38 PM TUE OCCUPIED NO ALARMS Minus - Menu Clear ESC Enter Alarm Communication Override Meridian Controls, Inc. Any reference in this document to roof top HVAC units are for ease of communication. Meridian can also be used on split systems Rev. A (0401)

2 INTRODUCTION Thank you for your interest in the Meridian Control System. This booklet was created to give you an overview of the different systems and system components. Meridian is a new approach to providing simple, cost effective, control solutions to many standard HVAC systems. Meridian provides a very competitive solution for buildings which need more control than a programmable thermostat yet building automation systems are too costly. These systems come pre-engineered, pre-programmed, and fully documented. This provides two main benefits for the contractor, engineer, and end user: Advanced direct digital control technology for comfort and energy savings at up to 50% lower cost than traditional direct digital control systems. A system that is simple to use allowing almost any HVAC technician to install and start-up the system without the need for specialized training. We ask that you review this booklet carefully to understand the bigger picture of what Meridian has to offer. Thank you in advance for taking the time to learn more about this new approach to building controls. THE MERIDIAN CONCEPT How many HVAC projects do you see every week that essentially requires a standard control sequence? I mean, there is nothing unique about how most of the equipment is to be operated. So many projects basically fit into a standard set of applications. However, many times these projects wind up with building automation systems which add substantial cost to the project. The reason building automation can be so expensive, even for the most simple HVAC systems, is because of the effort required to complete the project. When a controls contractor uses building automation equipment, the time required to estimate the job, assemble all of the components required, write software, generate installation drawings, debug the software, assemble documentation, etc., etc., etc., it adds a significant amount of cost to the project. When the cost becomes too great, many times the project has to be scaled back. Sometimes the building automation system is eliminated all together and standard electric or electronic controls are used. Unfortunately the end user loses many benefits that a building automation system can provide. The Meridian Control System is a new approach in HVAC controls to provide engineers, contractors, and end users a control system with many of the benefits of building automation without the high cost and complexity. Meridian is an Application Specific Control System. This means you order a control system package, based on the application, which is ready to install and start up without the expense and hassles normally associated with building automation systems. Meridian is currently offered in four configurations: Meridian CV systems are used in applications which only require the control of single zone HVAC units, typically roof top units. The CV system can control up to thirty single zone, constant volume HVAC units. The Meridian CV is a superior alternative for buildings where multiple programmable thermostats would have normally been installed. Meridian CV-EX systems are used in applications which have more than thirty single zone HVAC units. The CV-EX system can control up to sixty single zone, constant volume HVAC units, and each loop expansion kit allows for thirty more single zone HVAC units to be added to the system. A maximum of two loop expansion kits may be added to a CV- EX system allowing for a total of up to 120 single zone HVAC units on the system. Meridian Basic systems are used in applications where you have one constant volume HVAC unit and need to independently control individual zones. The Basic system controls up to sixteen zones. Meridian Plus systems combine both multiple zone control and single zone, constant volume control in one integrated system. You can control up to thirty Zone HVAC units with each having up to sixteen zones. Plus, in addition to the zone control, you can control up to a maximum of thirteen single zone, constant volume units. These four configurations can cover a broad range of building types such as offices, retail stores, schools, manufacturing facilities, and warehouses. Additional systems are being added in the near future to cover applications such as VAV (Variable Air Volume). TYPICAL BUIDING FOR MERIDIAN CV SYSTEM TheMeridianCVsystemisusedinbuildingswhichhavemultiple rooftop units and is an excellent alternative over programmable thermostats. The CV system provides one central location to monitor and program the controllers instead of having to program each thermostat individually. The system has many features typically not found with programmable thermostats such as: central operators interface, heating/ cooling failure alarm, change filter alarm, full energy saving economizer control, and holiday scheduling. Office Buildings Theaters Supermarkets Retail Stores Schools Houses of Worship Manufacturing Warehouses Restaurants 2 Introduction & Overview

3 COMM LINK II L O C O O P M M O P D E M Remote Link S I D G E T R D Y S N R D E C P W R DEC 08/21/00 03:38PM MON Meridian OCCUPIED Ver 1.0 NO ALARMS Clear Window Area ESC MENU ENTER 9 CLEAR 8 0 MINUS System ManagerAlarm Communication Override Rev. A (0401) FIGURE 1 : MERIDIAN CV - SYSTEM OVERVIEW SYSTEM HIGHLIGHTS: CV system supports up to thirty constant volume controllers. For systems with more than thirty constant volume units, use the CV-EX system. System Manager can be connected anywhere in the communications network. Complete modulating economizer control functions. CommLink interface included with the system. Provides connections for computer and modem for on site or remote communications. (Modem & computer optional). Trend Logging with Meridian Windows software. Computer (Optional) Supply Air Sensor *Outside Air Sensor Typical Constant Volume Unit RS-485 Comm Loop NOTE: * Only One Outside Air Sensor is Required per CV System F Generic Alarm Dirty Filter Alarm Shown Economizer (Actuator By Others) Room Sensor with Optional Override & Adj. 24 VAC CV Controllers Up to 30 Units with Standard CV System #1 #30 Modem (Optional) 24VAC RS Baud - System Manager 24VAC Local Loop CommLink II Single Loop Remote Link (Optional) FIGURE 2 : TYPICAL MERIDIAN CV SYSTEM. Introduction & Overview 3

4 TYPICAL BUILDING FOR MERIDIAN CV-EX SYSTEM The Meridian CV-EX system is used in buildings, which because of their size or design requirements, have more than thirty rooftop units. Standard CV-EX systems can facilitate up to sixty constant volume units. With the addition of a CV-EX Loop Expansion Kit an additional thirty units may be added to the CV-EX system. Two loop expansion kits can be added to the CV-EX system bringing the maximum total system capability up to 120 units. The CV-EX system provides one central location to monitor and program the controllers instead of having to program individual thermostats. The system has many features typically not found with programmable thermostats such as: central operators interface, heating/cooling failure alarm, change filter alarm, full energy saving economizer control, and holiday scheduling. : Office Buildings Theaters Schools Manufacturing Warehouses Houses of Worship FIGURE 3 : MERIDIAN CV-EX SYSTEM OVERVIEW 4 Introduction & Overview

5 SYSTEM HIGHLIGHTS: CV-EX system supports up to 120 constant volume controllers. System Manager can be connected anywhere in the communications network. Complete modulating economizer control functions. CommLink interface included with the system. Provides connections for computer and modem for on site or remote communications. (Modem & computer optional). Trend Logging with Meridian Windows software. FIGURE 4 : MERIDIAN CV-EX SYSTEM OVERVIEW Introduction & Overview 5

6 Typical Building for Meridian Basic System The Meridian Basic system is used in buildings where you have one constant volume HVAC unit and the need to provide independent comfort to individual zones. The Basic system controls up to 16 individual zones. Typical Applications: Office Buildings Retail Stores Restaurants Houses of Worship FIGURE 5 : TYPICAL BUILDING FOR MERIDIAN BASIC SYSTEM 6 Introduction & Overview

7 SYSTEM HIGHLIGHTS: Basic system supports up to sixteen Zone Controllers. Optional CommLink interface provides connections for computer and modem for on site or remote communications. (Modem & computer optional). Status LED s on Zone Manager for: Fan, Cooling, Heating, Bypass, Communication, and Alarm. Economizer output 0-10 VDC and contact output for exhaust/relief fan(s). Digital input for change filter alarm. Trend Logging with Meridian Windows software. FIGURE 6 : MERIDIAN BASIC SYSTEM OVERVIEW Introduction & Overview 7

8 Typical Building for Meridian Plus System The Meridian Plus system is used in buildings which require one or more rooftop units to be zoned, plus the additional requirement to control individual single zone constant volume units. The system can control up to thirty, zoned rooftop units with each unit having up to sixteen zones. With each zoned unit you can also control up to thirteen, single zone, constant volume units. As an example, if you have three zoned units, you can control up to thirty-nine constant volume units. Typical Applications: Office Buildings Theaters Supermarkets Retail Stores Schools Houses of Worship Manufacturing Warehouses Restaurants. FIGURE 7 : MERIDIAN PLUS SYSTEM OVERVIEW 8 Introduction & Overview

9 System Highlights: Plus system supports up to thirty Zone Managers. Each Zone Manager supports up to sixteen Zone Controllers and thirteen Constant Volume Controllers. System Manager can be connected anywhere in the communications network. CommLink interface included with the system. Provides connections for computer and modem for on site or remote communications. (Modem & computer optional). The Central Operator s Interface comes in two versions. For themeridianbasicitisazonemanagermountedinanenclosure with keypad and display mounted on the front. The Meridian Plus & CV/CV-EX use the System Manager which is mounted in an attractive plastic housing. FIGURE 8 : TYPICAL MERIDIAN PLUS SYSTEM Introduction & Overview 9

10 Central Operator s Interfaces Feature: Access and Programming to the Entire System. Menu Driven Programming. Maintenance Free Membrane Keypad. 4 Line by 20 Character Easy to Read Display. Backlighted Display is Easy to Read Even in Low Light Environments. Status LED s. Access Password Protected. System Manager Alarm Meridian Plus Clear Window Area 05/17/00 03:38PM WED OCCUPIED NO ALARMS ESC Communication Override DEC CLEAR MINUS 2 MENU 9 ENTER FIGURE 9 : KEY COMPONENTS OVERVIEW 10 Introduction & Overview

11 Zone Manager The Zone Manager is the master controller for Meridian Basic & Plus zone control functions. The Zone Manager calculates the heating and cooling requirements for each zone based on real time information received over the network from the Zone Controllers. The Zone Manager then directs the HVAC unit to provide the appropriate amount of heating, cooling, and ventilation to satisfy each zone s requirements. The Zone Manager also controls economizer and static pressure/bypass damper functions. The Meridian Basic system Zone Manager comes mounted in an enclosure with a keypad & display mounted on the front. The Zone Manager for the Plus system comes mounted on a backplate for mounting in the HVAC unit or remotely. Zone Manager Features: Controls two stages each of heating & cooling. The Meridian Plus system is capable of expanding to six stage control with the optional staging expansion board. Economizer output 0-10 VDC. Contact output for exhaust/relief fan(s). Bypass damper/static pressure control. Digital input for change filter alarm. On board time clock for scheduling/night setback functions. FIGURE 10 : ZONE MANAGER KEY COMPONENTS OVERVIEW Introduction & Overview 11

12 Zone Controller and Round Damper The Zone Controller monitors the space temperature and allocates the proper air flow into its assigned space to achieve desired comfort and ventilation levels. Zone Controller & Round Damper Features: Modular plug-in connections for actuator, flow sensor, & aux. relay board. Reduces installation time Eliminates potential wiring errors Both Pressure Dependent and Independent Control available from the same controller. Optional relay board for control of auxiliary heat and series or parallel fan boxes. Damper comes factory insulated reducing labor cost in the field. Controller automatically recognizes presence of flow sensor and aux. relay board at system power up and automatically configures controller to address those functions. Heavy duty, high reliability actuator with real-time feedback. Diagnostic LED s verify proper operation. Blade pins are 7/16 hexagon shaped aluminum, fixed to a Celcon inner bearing that rotates within a polycarbonate outer bearing inserted in the damper frame. Damper linkage is mechanically assembled and located in the damper frame. Blade gaskets are made of extruded EPDM material and are secured within an integral slot on the blade. Jamb seals are of extruded TPE material for low leakage through the damper when closed. FIGURE 12: RECTANGULAR DAMPER FIGURE 11: ZONE CONTROLLER AND ROUND DAMPER The Rectangular Damper is used in applications where rectangular duct is specified or required because of space limitations or job requirements. The Rectangular Damper utilizes opposed blades of airfoil design for improved air flow control. Damper frame, blades and linkage are made of extruded aluminum. Rectangular Dampers Feature: l Damper frame, blades and linkage are made of extruded aluminum. The Rectangular Zone Damper Kit provides a new solution for rectangular zone damper applications. The Rectangular Damper Kit is used in conjunction with the previously described rectangular dampers. All control components and actuators are identical to the round air damper. The Rectangular Damper Kit fits over the damper shaft for easy field mounting. Rectangular Damper Kits Feature: Factory mounted controls. Same specifications as our round damper controls Integral galvanized sheet metal enclosure Enclosure is provided with knockouts top and bottom for easy wiring Built in standoff for mounting over damper flanges Knockout in front of cover allows damper shaft to extend through enclosure, when required 12 Introduction & Overview

13 FIGURE 13: RECTANGULAR DAMPER KIT The CV Controller is used in both the Meridian Plus, CV and CV-EX systems. It is designed to control a single zone constant volume unit. The controller can be mounted in the control panel of the roof top unit or remotely. CV Controllers Feature: Four configurable relay outputs for heating/cooling control. Economizer output 0-10 VDC. Digital input for change filter alarm. On board time clock for scheduling/night setback functions. Unique alarming feature notifies you of heating or cooling failures FIGURE 14 : CV CONTROLLER The CommLink is included with the Meridian CV, CV-EX and Plus Systems. It is optional for the Meridian Basic. The CommLink Interface acts as a network hub for token passing. It also handles alarm gathering for remote call out. The CommLink has connections for both computer and modem. FIGURE 15 : COMMLINK INTERFACE Introduction & Overview 13

14 The flush mount Room Sensor comes in an attractive, off white color suitable with most any decor. The sensor can be painted or wall papered without affecting performance. The patented design provides accurate sensing of room temperature with the benefit of a tamper proof package. The sensor comes in four different configurations: Sensor Only Sensor with override Sensor with setpoint adjustment Sensor with override & setpoint adjustment. Setpoint adjustment affect can be programmed ±0-5 F from the central operators interface. ADD ON DEVICES Various Add On Devices are available in addition to the standard controllers previously described. These Include the following. CV-C Controller - The CV-C Controller is a field configurable Constant Volume Controller for single zone applications where additional capability is required beyond the standard functions of the CV controller. The CV-C can be configured for applications for CO2/IAQ economizer control, dehumidification, modulating of HW &CW control valves. The CV-C digital outputs can be expanded via a plug-in expansion board from applications requiring additional staging control of heating and cooling. General Purpose Controller - The GPC has (5) Universal Inputs that can accept a contact closure, thermistor temperature sensors, or 4-20mA/2-10vdc signal. The controller has (5) digital outputs for on/off control and (1) analog output to modulate a valve or damper. These inputs and outputs can be configured in a variety of ways using And/Or logic functions, time schedules, setpoints, etc. to perform many different tasks. The GPC can be used for not limited to: many applications including, but Control Unit Heaters Control Boilers Control Exhaust Fans Monitor Temperature Monitor Humidity Monitor Status Contacts FIGURE 16 : ROOM SENSORS Optimal Start Scheduler - Provides Expanded Scheduling Capabilities beyond those incorporated with the standard Meridian systems. Scheduler provides for optimal Start/Stop and up to (7) independent schedules with 2 Start/Stop events per day and (14) Start/Stop holiday events perschedule. Lighting Panel Controller - Adds Lighting Control Capability to the Meridian System. The controller provides up to (7) Independent time schedules and light level controls. Wetbulb Module - Provides wetbulb temperature monitoring for control of all economizer equipped units on the Meridian system. Future plans include the introduction of a Tenant Override Controller. This device will allow monitoring and logging of tenant HVAC equipment usage. In keeping with our philosophy of making Meridian systems simple to install, we have developed Meridian Communication Cables that make the installer s job even easier! This new cable meets the specifications of our recommended Belden #82760 cable but has a very unique feature: Color Coded and Labeled for Both the Network and Local Loop! 14 Introduction & Overview

15 FIGURE 17 : TYPICAL ADD ON DEVICES You may ask - Why is that important? In both the Meridian Plus and CV-EX Systems, two types of communication loops are required. Network Loop - This Loop originates at the CommLink and interconnects the MiniLink Network cards for each of the Zone and/or CV Controller loops. MiniLinks are supplied factory mounted on the Zone Mangers for the Plus System. In the CV- EX System, MiniLinks are mounted on a backplate. Local Loop - This is always the communications loop to which the individual Zone Controllers, System Manager, CV Controllers and any other controllers (GPC, Optimal Start Scheduler, Lighting Panel) are connected. Color coded cables help the installer keep the two communication cables separate and identifies the cable, during installation and after, as being installed for the Meridian Systems. Even when installing the Meridian Basic and CV Systems, where there is only one communication loop, color coded cable can be beneficial to a quality installation. In addition, making the color coding part of the controls specification can add additional cost to your competitors bid by requiring them to locate nonstandard cable to meet the specifications. Imagine This Common Dilemma: The contractor is at the job site looking up at the ceiling. There are cables strung everywhere cables for alarms, speakers, computers, control systems, etc. These cables all look the same, except for the Meridian communication cables. These are easily recognizable because of the color coding and labeling printed on the cable. The labeled and color coded communication cable is an enhancement that makes the contractors job easier. Pre-marked and color coded cables save the contractor expensive wire tracing and troubleshooting time. FIGURE 18 : COMMUNICATION CABLE Introduction & Overview 15

16 SYSTEM MANAGER Power...24VAC 25 VA Maximum Dim... 9"W x 6.3 H x 2"D Operating Temp...10ºF - 149º F Display...4 Line by 20 Character Backlighted LCD Keypad...20KeyMembrane Communications...RS Baud Weight...1.5lb. ZONE MANAGER-Basic Power...24VAC 25 VA Maximum Dim "Wx9 Hx2.5"D OperatingTemp...10ºF-149ºF OperatingHumidity...Max.90%RH non-condensing Display:...Backlighted4Line by 20 Character Keypad:... 16Keys Inputs-Thermistor (Type III) OutsideAirSensor...-30ºF-180ºF SupplyAirSensor...-30ºF-180ºF ReturnAirSensor...-30ºF-180ºF Inputs-Analog Pressure Sensor... 0to5 WC Bypass Actuator FeedbackRange...500to7300Ω Inputs-Digital EconomizerDisable... DryContact ChangeFilterAlarm... DryContact Forced Occupied Mode... DryContact Outputs-Digital (2 24 VAC)* Fan...N.O.Relay CoolingStage#1...N.O.Relay CoolingStage#2...N.O.Relay HeatingStage#1...N.O.Relay HeatingStage#2...N.O.Relay BypassActuator... Tri-state ExhaustFan...N.O.Relay * Optional relay expansion board available for additional stages of heating and cooling. Output Analog (1kΩ min. load) EconomizerActuator VDC Communication...RS-485/9600Baud Weight...Approx.4lb. ZONE MANAGER-Plus Power...24VAC 25 VA Maximum Dim "Wx9 Hx2.5"D OperatingTemp...10ºF-149ºF OperatingHumidity... Max90%RH non-condensing I/O Configuration: Inputs-Thermistor (Type III) OutsideAirSensor ºF-180ºF SupplyAirSensor ºF-180ºF ReturnAirSensor ºF-180ºF Inputs-Analog Pressure Sensor... 0to5 WC Bypass Actuator FeedbackRange...500to7300Ω Inputs-Digital EconomizerDisable...DryContact ChangeFilterAlarm...DryContact Forced Occupied Mode...DryContact Outputs-Digital (2 24 VAC)* Fan... N.O.Relay CoolingStage#1... N.O.Relay CoolingStage#2... N.O.Relay HeatingStage#1... N.O.Relay HeatingStage#2... N.O.Relay BypassActuator...Tri-state ExhaustFan... N.O.Relay * Optional relay expansion board available for additional stages of heating and cooling. Output-Analog (1kΩ min. load) EconomizerActuator VDC Communication...RS Baud Weight...Approx.4lb. ZONE CONTROLLER Power...24VAC 10 VA Max. Including Actuator Dimensions...7"Wx4 Hx1.5"D OperatingTemp...10ºFto149ºF OperatingHumidity... Max90%RH non-condensing I/O Configuration: Inputs RoomSensor...40ºFto120ºF AirFlowSensor*...Range CFM * For Pressure Independent operation only Outputs DamperActuator... Tri-StateRelay Modular Jack Connection ExpansionPort...RelayBoard Optional-Modular Jack Connection CV CONTROLLER Power...24VAC 20 VA Maximum 16 Introduction & Overview

17 Dim "Wx7.25"Hx1.5"D OperatingTemp...10ºF-149ºF OperatingHumidity... Max90%RH non-condensing I/O Configuration: Inputs RoomSensor...40ºF-120ºF OutsideAirSensor ºF-180ºF SupplyAirSensor ºF-180ºF ChangeFilterAlarm...DryContact Outputs-Digital (2 24 VAC)* Fan... N.O.Relay CoolingStage#1... N.O.Relay CoolingStage#2... N.O.Relay HeatingStage#1... N.O.Relay HeatingStage#2... N.O.Relay Output-Analog EconomizerControl VDC Weight...1.5lb. ACTUATOR Power...24VAC50/60HZor24VDC 3.0 VA Maximum Dim Hx2.56"Wx2.32"D OperatingTemp ºF-122ºF Mounting...DirectCoupled Rotation... 0ºto95ºAdjustable Wiring...RJ11-ModularJack RunningTorque...35in-lb. RunTime Sec./0-35in-lb FeedbackResistance...0to 10KΩ/95º Weight...1.2lb. BYPASS PRESSURE SENSOR Power...5VDC Powered from Zone Manager Range...0 to5 WC Accuracy...±0.5% OperatingTemp... 57ºFto284ºF Dimensions...Approx.2.25 x3 Weight...2.5oz. ROOM SENSORS SensorElement... TypeIII Thermistor Accuracy...±0.4º F between 30º F to 150º F Dimensions RoomSensor... Std.SingleGang Flush Mount - White Plastic Tamper Resistant 2.75 W x 4.5 H x 1.25 D SensorOptions...OverrideButton Setpoint Adjust Slide DuctSensor...6 Length Outside Air Sensor... WeatherProtectiveBox 2.75 W x 4.5 H x 1.25 D COMM LINK II Power...24VAC 14 VA Maximum Dim...1-5/8 Hx5.25"Wx7"D OperatingTemp...10ºF-140ºF Communications: Computer...RS-232/9600Baud Network... RS-485/19,200Baud Protocol... HSIOpenProtocol Token Passing Connections: Power... QuickDisconnect Terminals RS QuickDisconnect Terminals Computer...9Pin/DB9Male Modem...9Pin/DB9Male Introduction & Overview 17

18 MERIDIANVIEW SOFTWARE The MeridianView software is an easy to use graphical user interface for the Meridian family of systems. The Meridian software has many features typically found in more expensive building automation software such as: Very easy to use Color graphic status screens Password Access (9 Levels) User definable passcode levels for every available setpoint Trend logging using Excel compatible spreadsheets Graphics editor for drawing custom floor plans, etc. English language descriptors for all control points Alarm reporting Dial in/out to multiple installations User friendly navigation Built in text editor for viewing all history logs, etc. History logging of users actions Current status printouts Alarm call-out from remote locations 18 Introduction & Overview

19 FIGURE 19 : MERIDIANVIEW SOFTWARE Introduction & Overview 19

20 FEATURES AND BENEFITS NON-PROPRIETARY Meridian will work on any manufacturers HVAC equipment that will accept a standard thermostat connection. This protects the end user from being locked in to one source for service and support. In addition, Meridian Systems include very comprehensive documentation, which was written in a format specifically for a non-controls technician. Because the manuals are so user friendly, it prevents the end user from being locked-in to one contractor for service. Any new contractor needs only a copy of the system manual to have as much technical information as any previous contractor. PRE-ENGINEERED / APPLICATION SPECIFIC System design, software, and documentation has already been done for you. This eliminates the costly expense usually associated with conventional DDC systems, making the Meridian system more competitive and easier to install and operate. ONE SYSTEM FOR BOTH ZONED & SINGLE ZONE SYSTEMS Not only does Meridian provide a networked control system for one or multiple zoned HVAC units, but also allows connection of individual single zone units to the system, eliminating the need to use programmable thermostats. EASY TO CONFIGURE Since Meridian components are grouped into packages, configuring a system has been simplified. This reduces the chance of ordering errors and makes system layout effortless! USER FRIENDLY SET UP Since the Meridian comes with menu driven, fill in the blank programming, system setup is simple. The system manual takes you step by step through the set up process. Default parameter values are programmed into permanent memory so the system can be operational at start-up. Specialized training is not required. TRUE NETWORK COMMUNICATIONS The Meridian uses a three wire, RS-485 loop for communication between all controllers in the system. This provides a very reliable form of communication with flexibility of installation. The loop can be wired in a daisy chain or star configuration. Many other zoning systems utilize home run wiring that requires all communication cables to be brought back to a central point adding additional cost to the project and complicating wiring. HIGH INTEGRITY COMMUNICATIONS Many communicating control systems are susceptible to electrical interference. One major manufacturer of zoning systems recommends that their communication cable should not be strapped to conduit because of potential interference. The Meridian Systems have a communication bus that is almost immune to any noise problems that may be found in commercial facilities. MICROPROCESSOR CONTROLLERS All controllers in the Meridian system have an on board microprocessor. This is what gives the Meridian system its powerful features and capabilities not found in other systems. OPERATORS INTERFACE All Meridian systems have an operators keypad and display terminal. This gives you access to all system status and parameter values without the need for a computer. The 4 line by 20 character display is backlighted making it easy to read even in low light environments. MEMORY BACKUP Instead of batteries, which have to be replaced, Meridian controllers utilize super capacitors to provide power for memory backup during power outages. The major advantages to this approach is that super capacitors are more reliable than batteries and they recharge in a matter of seconds instead of hours. Typical memory backup is good for a minimum of 10 days. MODULATING, HEAVY DUTY ACTUATORS WITH REAL TIME FEEDBACK All Meridian system actuators utilize true modulating control unlike many systems, which are two position. This gives the system improved control which translates to better comfort levels. Our actuators are also rated for 2-½ million cycles making our actuators some of the most reliable in the industry. One other critical feature is the real time feedback. Many other systems have no feedback at all. They blindly estimate the travel time of their actuator, which, in the real world, is not a very repeatable estimate. To help correct the problems inherent with this approach, they recycle all the actuators in the system once or twice a day. They may save a few dollars by not including feedback but they sacrifice system performance. Not so with Meridian. PATENTED ROOM SENSORS Our flush mount room sensors are so unique, they are patented (U.S. Patent No. 4,659,236). Even though part of the sensor is recessed into the wall to provide an attractive yet tamper proof flush mounting, internal wall temperatures do not influence the sensor. A special plate on the face of the sensor accurately senses space temperature. Even though the attractive off white plastic housing is a preferred color, the sensor housing can be painted or wallpapered to blend with 20 Introduction & Overview

21 room decor without affecting sensor performance. The sensors are offered in four different configurations: Sensor Sensor w/setpoint adjustment MODULAR CONNECTIONS Many Meridian auxiliary devices are connected to the controllers via modular plugs like the ones used on telephones. This simplifies installation and eliminates the possibility of wiring errors. The devices, which utilize this method, are damper actuators for zone and bypass control, auxiliary relay boards, and static pressure/air flow sensors. There is one interesting side note about the auxiliary relay board and airflow sensors. These devices are typically used on the zone controllers in the Meridian Basic & Plus systems. When the system is powered up, it automatically looks to see if these devices are connected to the controller. If they are, the controller automatically reconfigures itself to utilize these devices and activates the appropriate set up screens back at the operators interface. Pretty neat don t you think! FREE! WINDOWS COLOR GRAPHICS SOFT- WARE Each Meridian system can be monitored on site or remotely using a PC and our Meridian Windows software. This fullfeatured package is very user friendly and can be used to monitor one system or hundreds. Meridian is not copy protected so it can be installed on multiple PC s without additional expense. Just some of its many features include but not limited to: Pre-designed status screens for all controllers Programming of all system parameters OPEN PROTOCOL Sensor w/override Sensor w/override & setpoint adjustment Alarm dial out capability Trend logging to Excel spreadsheets Alarm Handling Custom graphics capability Meridian is an open protocol based system allowing other manufacturers to develop direct interfaces to the communications loop. This gives you the ability to integrate the Meridian system into products from other vendors. Our engineering staff will be glad to assist any vendor in this process. ALL MERIDIAN CONTROLLERS AND PC SOFTWARE ARE Y2K COMPLIANT MERIDIAN ZONE CONTROL FEATURES Pressure Dependent and Pressure Independent zone operation from the same controller. Pressure Independent control is automatically detected by the Zone Manager upon start up. System automatically displays appropriate setpoints and status screens. Bypass Damper actuator can be software selected for direct or reverse acting operation. Zone Manager controls up to two stages each of heating and cooling. An optional expansion board provides control for up to six stages each. Outside Air Sensor provides signal input to provide control of: Economizer operation Lockout setpoints for: Cooling lockout during low outside air temperature. Heating lockout during high outside air temperatures. All staging delays, minimum off times, and heating/cooling changeover intervals, are programmable. Return air sensor determines if the economizer should be disabled when the outside air temperature is within 5 F of return air temperature. Economizer Control: All related variables are programmable: minimum damper position, enable setpoint, supply air setpoint, voltage limits, and control interval. Economizer enable/disable enthalpy switch input for improved control. Optional wetbulb module provides wetbulb input for maximum performance. Contact closure input for dirty filter alarm. Sensor offset calibration to correct sensor errors due to location, etc. Meridian Plus provides control of individual constant volume air handlers. Room sensor slide adjustment effect can be programmed from ±0 F to 5 F. Global and individual zone override modes. Meridian Plus has manual airflow/damper force modes available for troubleshooting or air balancing purposes. Zones can be programmed for Voting or Non-Voting status wh ich allows the user to eliminate the troubled zones from the Zone Manager s decision process. SUMMARY Meridian Systems Provide: Application Specific, Turn-Key Control Packages Pre-Engineered System Design l30-50% Savings Over Traditional Building Automation Systems luser Friendly Installation & Setup lproven, Reliable Hardware & Software lcomprehensive, User Friendly, Documentation lfree Windows Based Software Factory Support Introduction & Overview 21

22 Thank you for taking the time to learn about the Meridian family of control systems. If you have any questions or would like more information, contact your factory authorized Meridian distributor. If you do not know who your distributor is, please contact Controls direct at (816) Thank you again for your interest in Meridian Control Systems. APPLICATION NOTES: Designing a Successful Zoning System This is a summary of the basic items you need to consider for the design and layout of a successful zoning system. It is important that you study the design guide for a more in depth understanding of proper system design. Byfollowing the design guide and these tips you can eliminate many unnecessary headaches that occur when the basic rules of zoning are not followed. Always contact Controls if you have any questions. Always group zones with similar load profiles on the same HVAC unit. Never mix perimeter zones with interior zones on the same HVAC unit. Each zoned HVAC unit should have a minimum of 3-4 zones. Any less and you should consult the factory. Each zoned HVAC unit can support a maximum of 16 voting zones. Any more zones and you should contact the factory. When using auxiliary heat for individual zones, perimeter heat is always preferred and more economical to operate. If you have box mounted electric reheat coils, it is recommended that a fan powered box be used. Consult factory for further details concerning this application. Zoning System (Meridian) Constant Volume HVAC Unit Static Pressure Control using bypass damper(s) * HVAC Unit has both heating and cooling HVAC unit controlled based on voting and/or demand of zones Uses modulating zone dampers Zone damper is usually pressure dependent Reheat & Fan powered boxes can be used but not very common If there is an economizer on the HVAC unit, it is highly recommended, though not required, that the Zone Manager control the economizer. Pressure Independent Zones must always use round dampers, never rectangular - no exceptions! Never attempt to use a zone control system on a true VAV application. See application note titled Zoning is NOT True VAV. Bypass dampers should always be sized for 60%-70% of the HVAC units rated CFM. APPLICATION NOTES: Zoning is NOT true VAV Even though there are some similarities between zone control systems and Variable Air Volume, there are some major differences. In many cases systems will be called VAV when in fact they are really a zoning system. Some of this confusion comes from the term Carrier uses VVT. Always make surethatyoudonottrytoadaptazonesystemtoatruevav design. By understanding the differences, you can save your self from misapplications and much grief. Sales Opportunity In many cases VAV systems go over budget because of the expense of the inlet vanes or VFD, and the cost of a more expensive control system. Many sales people have been able to redesign these systems using Meridian systems with a significant cost savings. Be sure to follow the recommendations in the design guide since rerouting of duct work is common when converting the system from VAV to zoning. If you need further assistance, contact Controls at True VAV Variable Air Volume HVAC Unit Static pressure control using inlet guide vanes or variable frequency drive HVAC unit typically is cooling only. If it has heat it is usually used just for morning warm-up HVAC unit based on discharge air temperature Uses modulating VAV box VAV damper is usually pressure independent Reheat & Fan powered boxes commonly used *. Inlet Guide Vanes as a rule do not provide enough airflow turn down to work in most zoning applications. 22 Introduction & Overview

23 Zoning a Millenium Unit When using the York Millennium units for zoning applications, several rules must be considered to prohibit potential problems. Because of the large air flow capacities of the 30 and 40 ton units, great care must be taken in sizing zone and bypass dampers. What is Pressure Independent? A commonly asked question is what is the difference between Pressure Dependent and Pressure Independent zone dampers? I will try to explain the concept in a very simple manner. Here goes: Use this guide to help keep you out of trouble. Always use the Meridian Plus system even if you only have one Millennium unit that you are zoning. Use only the Constant Volume Millennium s since Meridian currently has no provision to control variable frequency drives or inlet guide vanes. As a side note: inlet guide vanes do not provide enough turn down of air flow to properly work in most zoning applications. The OE AGSTG relay expansion card is required for each Zone Manager controlling a Millennium unit. Bypass dampers should be sized for 70% of the rated CFM of the unit. Because of the large air volumes involved, rectangular dampers should be used instead of round dampers. Consult the rectangular damper sizing guide in the price list for CFM ratings. Zoned Millennium units should always have a minimum of 6 zones due to the high airflow capacities. Topreventexcessivenoiseinthesystem,zonedamper total minimum air flow settings should be equal to or preferably greater than 30% of the units rated CFM. As an added precaution, we recommend a high duct static safety switch be installed Dwyer Model MR or equal to prevent over pressurization of the duct work. If you have any questions, please contact Controls at Millenium is a registered trademark of York International Corp. Any HVAC system that has some form of variable air control will experience fluctuations in static pressure. Zone dampers have both a minimum and maximum air flow settings to insure proper ventilation. In Pressure Dependent (PD) dampers, this minimum and maximum is set based on damper position. During the final commissioning of the system, each zone is balanced with a flow hood and the min/max position is fixed either mechanically or the preferred method, in the controller software. Since this min/max setting is based only on position, as the static pressure fluctuates it will cause the actual air flow at the zone damper to increase or decrease. Therefore the name, Pressure Dependent since the airflow is Dependent on the static pressure. In Pressure Independent (PI) dampers this minimum and maximum is set based on actual air flow through the damper. Airflow is measured using a flow cross or flow ring and an electronic air flow sensor. Using this method you always know the actual air flow through each zone damper. The minimum and maximum settings are based on this actual air flow reading. As the static pressure fluctuates, the flow sensor reads the variation and automatically repositions the damper to maintain the minimum flow setpoint. Therefore the name, Pressure Independent since airflow is maintained independent of static pressure. So now you ask, do I need Pressure Independent zone dampers? Usually not. The main disadvantage is the added expense of the airflow sensor can add up to some significant dollars. There are manufacturers who always specify PI dampers. The only reason we can figure why they do this is one - they don t think others can do it and try to keep you out of the specification, or two -since many companies have no form of true feedback on the zone damper position, they use the flow sensor instead. Introduction & Overview 23

24 Subject to change without notice. Printed in U.S.A Rev. A (0401) Copyright by Unitary Products Group All rights reserved. Supersedes: Rev. A (0301) Unitary 5005 Norman Product York OK Group Drive 73069