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WattMaster Auto-Zone CV Design, Installation And Operation

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CV & CV-EX System
Design, Installation
And Operations Manual
Revision 01B
firealarmresources.com

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Summary of Contents for WattMaster Auto-Zone CV

  • Page 1 CV & CV-EX System Design, Installation And Operations Manual Revision 01B firealarmresources.com...
  • Page 2 firealarmresources.com...
  • Page 3 This document is subject to change without notice. WattMaster Controls, Inc. assumes no responsibility for errors, or omissions herein. Auto-Zone CV & CV-EX Installation & Operations Manual - Form WM-AZCV-IO-01B Auto-Zone is a registered trademark of WattMaster Controls, Inc. Copyright 2003 WattMaster Controls, Inc.
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  • Page 5: Table Of Contents

    Section 1 Table of Contents Conventions ..............1 Introduction ..............2 CV System Overview ......................2 CV System Features......................3 CV-EX System Overview....................4 CV-EX System Features ....................5 Table of Figures Figure 1-1: Typical Building for CV System ........2 Figure 1-2: Typical CV System............3 Figure 1-3: Typical Building for CV-EX System.......
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  • Page 7: Conventions

    Auto-Zone CV & CV-EX Section 1 Conventions This document uses the following definitions throughout as a guide to the user in determining the nature of information presented: Note: Additional information which may be helpful Tip: Suggestion to make installation, set-up, and troubleshooting easier.

  • Page 8: Introduction

    Introduction CV System Overview The Auto-Zone CV system is used in buildings which have multiple 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.

  • Page 9: Cv System Features

    Auto-Zone CV & CV-EX Section 1 CV System Features NOTE: * Only One Outside Air Sensor is Required per CV System Typical Constant Volume Unit Generic Alarm Supply Dirty Filter Alarm Shown Sensor Computer CV Controllers Economizer Outside (Optional) (Actuator By Others)

  • Page 10: Cv-Ex System Overview

    Section 1 CV-EX System Overview The Auto-Zone 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.

  • Page 11: Cv-Ex System Features

    Auto-Zone CV & CV-EX Section 1 CV-EX System Features NOTE: * Only One Outside Air Sensor is Required per CV-EX System Typical Constant Volume Unit Generic Alarm Supply Dirty Filter Alarm Shown Sensor Computer (Optional) Economizer CV Controllers Outside (Actuator By Others)
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  • Page 13 Section 2 Table of Contents Tips Before Beginning Installation ..............1 Systems Overview ..................2 CV System ........................2 CV-EX System ........................3 Communications Loops.................4 CV & CV-EX Communications Loops ................4 Communications Loop Wiring Overview................5 CV Controller....................8 CV Controller Wiring ......................9 CV Controller Addressing .....................11 CV System Sensors ..................12 Room Sensors ........................12 Supply Air Temperature Sensor ..................14...
  • Page 14 Section 2 Table of Figures Figure 2-1: CV System Overview ..................2 Figure 2-2: CV-EX System Overview................3 Figure 2-3: CV Communication Loop Wiring, Daisy-Chain Configuration....5 Figure 2-4: CV-EX Communication Loop Wiring, Daisy-Chain Configuration ...6 Figure 2-5: CV Controller With Backplate - Components..........9 Figure 2-6: Constant Volume Controller Wiring............9 Figure 2-7: CV Controller Address Switch Setting............11 Figure 2-8: Room Sensor Installation................12...

  • Page 15: Tips Before Beginning Installation

    Auto-Zone CV & CV-EX Section 2 Tips Before Beginning Installation Take a few moments to review the following before beginning installation of the Auto- Zone CV and CV-EX systems. • Familiarize yourself with all system components and review all documentation. Pay special attention to “Cautions”...

  • Page 16: Systems Overview

    Auto-Zone CV & CV-EX Section 2 Systems Overview CV System NOTE: * Only One Outside Air Sensor is Required per CV System Typical Constant Volume Unit Generic Alarm Supply Dirty Filter Alarm Shown Sensor Economizer Outside (Actuator By Others) Room Sensor...

  • Page 17: Cv-Ex System

    Auto-Zone CV & CV-EX Section 2 CV-EX System NOTE: * Only One Outside Air Sensor is Required per CV-EX System Typical Constant Volume Unit Generic Alarm Supply Dirty Filter Alarm Shown Sensor Computer (Optional) Economizer CV Controllers Outside (Actuator By Others)

  • Page 18: Communications Loops

    Auto-Zone CV & CV-EX Section 2 Communications Loops The Communications Loop for both the CV and CV-EX systems is two wire shielded RS-485. The loop is best connected in daisy chain configuration, meaning the loop is connected from one controller to another. It is not necessary to sequentially address the CV Controllers in relation to their location on the loop.

  • Page 19: Communications Loop Wiring Overview

    Auto-Zone CV & CV-EX Section 2 Communications Loop Wiring Overview The daisy chain is the best method for running a communications loop since there is only one starting point and one ending point for each of the communications loops. See Figure 2-3 and Figure 2-4.
  • Page 20 Auto-Zone CV & CV-EX Section 2 CV Controller CV Controller COMM COMM RELAY RELAY OUTPUT OUTPUT SHLD SHLD A la ti o ic a EPROM EPROM COMM COMM e rr REC. REC. E sc COMM COMM TEST TEST ADDRESS ADDRESS...
  • Page 21 Auto-Zone CV & CV-EX Section 2 Even though the daisy chain configuration is preferred, the star configuration can also be used for the CV or CV-EX systems. If required, a combination of the two can also be used. Remember, the best communications loop wiring scheme is the one which utilizes the minimum number of ends while using the shortest wiring path.

  • Page 22: Cv Controller

    Auto-Zone CV & CV-EX Section 2 CV Controller The CV Controller (Constant Volume Controller) may be installed in any convenient protected location. Observe the recommended environmental limitations for the CV Controller. It should not be mounted in locations subject to extreme low or high temperatures (below 20°...

  • Page 23: Cv Controller Wiring

    Auto-Zone CV & CV-EX Section 2 Figure 2-5: CV Controller With Backplate - Components CV Controller Wiring CV Controller All Comm Loop Wiring Is Straight Thru Connect To Next Controller And/Or Constant Volume MiniLink On Unit Connections Local Loop RELAY...
  • Page 24 Auto-Zone CV & CV-EX Section 2 Warning: Polarity is very important when connecting power to the controllers! The grounded side of the control transformer must be connected to the terminal labeled GND on the CV Controller. If a single transformer is used to power more than one CV Controller you must connect GND-to-GND and 24VAC-to-24VAC on each CV controller.

  • Page 25: Cv Controller Addressing

    Auto-Zone CV & CV-EX Section 2 CV Controller Addressing CV Controller Address Switch Values CV Controller Address Switch Setting Address Switch Values Are Not Switch Shown Is Address Switch Values Are Labeled On The CV Controller Added Together When The...

  • Page 26: Cv System Sensors

    Auto-Zone CV & CV-EX Section 2 CV System Sensors Room Sensors The Room Sensor uses a patented flush mount design to isolate the temperature sensing element from the housing which mounts flush with the wall surface. Room Sensors should be located on an inside wall away from direct sunlight or heat producing equipment such as computers, copiers, etc.
  • Page 27 Auto-Zone CV & CV-EX Section 2 Tip: Be careful when cutting the hole for the sensor or the plastic bezel of the sensor may not completely cover the opening. Tip: If sensors must be installed on walls which are solid and cannot be penetrated, surface mounted boxes and raceway can be purchased from your local electrical distributor.

  • Page 28: Supply Air Temperature Sensor

    Auto-Zone CV & CV-EX Section 2 Supply Air Temperature Sensor The supply air temperature sensor should be located as close to the rooftop unit discharge as possible for best response. Locate the sensor in the center of the widest part of the duct.

  • Page 29: Outside Air Temperature Sensor

    Auto-Zone CV & CV-EX Section 2 Outside Air Temperature Sensor The outside air sensor must be located where it will not be affected by direct sun or heat producing equipment. Mounting under the eve of a roof is often a good choice.

  • Page 30: Commlink Ii Interface

    Auto-Zone CV & CV-EX Section 2 CommLink II Interface The CommLink II Interface acts as the local communications loop master for the CV system and the network loop master for CV-EX systems. See Figure 2-12 for dimensional data. It also provides for an on-site computer hook-up or Remote Link interface connection to the system for remote communications, with both the CV or CV- EX systems.

  • Page 31: Commlink Ii Wiring

    Auto-Zone CV & CV-EX Section 2 Figure 2-12: CommLink II Interface Dimensional Data CommLink II Wiring CommLink Is Supplied With 110/24VAC Power Supply. COMMLINK II COMMUNICATIONS INTERFACE If Desired A Transformer (By Others) May Be Wired To The CommLink Instead. See Note 1.

  • Page 32: System Manager

    Auto-Zone CV & CV-EX Section 2 System Manager The microprocessor based System Manager is a device which allows the CV controller or any Add-on device connected to the system, to be programmed and monitored from a central location. The System Manager is connected via the RS-485 communication network.

  • Page 33: System Manager Wiring

    Auto-Zone CV & CV-EX Section 2 Figure 2-13: System Manager Dimensional Data System Manager Wiring The System Manager can be connected anywhere on the CV or CV-EX system local communications loop. Do Not Connect the System Manager to the CV-EX System Network Loop! The system will not function if the System Manager is connected to the network loop.

  • Page 34: Minilink Interface

    Auto-Zone CV & CV-EX Section 2 MiniLink Interface The MiniLink Interface is only required and used with the CV-EX system. It is not required for the CV system. It functions as the loop master for each CV-EX system local loop. With the CV-EX system, each local loop of CV controllers (maximum of 30) is connected to a MiniLink.

  • Page 35: Minilink Interface Wiring

    Auto-Zone CV & CV-EX Section 2 MiniLink Interface Wiring All MiniLinks on the CV-EX system must be wired to each other with a Network communications loop, daisy chaining the Network loop terminals together. One end of the CV-EX system Network loop must be connected to the CommLink II interface. Each MiniLink on the CV-EX system is then wired from its Local loop terminals, to the CV Controllers on that Local loop.

  • Page 36: Cv & Cv-Ex Worksheet

    Auto-Zone CV & CV-EX Section 2 CV & CV-EX Worksheet Project: ___________________________ Location: ___________________________ Stages of Cool: ___ Stages of Heat: ___ Electric Economizer Yes t Li k I t ll d Y Unit Unit Description or Location Sensor Type Address [S=Sensor] [SO=Sensor w/ Override] [SA=Sensor w/ Setpoint adjust] [SOA=Sensor w/ Override &...
  • Page 37 Section 3 Table of Contents LCD/Keypad Operations ........... 1 Keypad Functions ......................1 System Manager LED Indicators..................2 View Alarms Screen ............5 Full System Access ............6 Set Time & Date............... 6 New Passcodes..............8 Rebuild Alarm Map............9 Read/Reset Units ............10 CV Controller Force Modes..........
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  • Page 39: Lcd/Keypad Operations

    Auto-Zone CV & CV-EX Section 3 LCD/Keypad Operations Keypad Functions The System Manager keypad is labeled either numerically or as to actual function for that key. Below is a summary of the labeled keys and their functions. Thursday Operations SYSTEM...

  • Page 40: System Manager Led Indicators

    Auto-Zone CV & CV-EX Section 3 System Manager LED Indicators There are three LED indicators located on the right hand side of the System Manager. The top LED indicates an Alarm condition if the Manager detects an alarm condition while polling the system.
  • Page 41 Auto-Zone CV & CV-EX Section 3 Main User Menu 1) View/Change For quick access to an individual 1) View/Change Zone 2) View Alarms Zone zone, select this menu item. Any MENU) Full Access Constant Volume unit can be ESC) Main Screen selected.
  • Page 42 Auto-Zone CV & CV-EX Section 3 Constant Volume Status If the selected Unit ID is correct, and the unit responds, the Constant Volume Unit Temperature: 75.4°F following screen will appear. If you are a Level 1 user, you can Cooling SP.: 75°F...

  • Page 43: View Alarms Screen

    Auto-Zone CV & CV-EX Section 3 View Alarms Screen Alarm Address Locations The System Manager can be programmed to poll all the Auto- SYSTEM ALARM STATUS Alarm @ Unit ID Zone units on your system for alarm information. This allows...

  • Page 44: Full System Access

    Auto-Zone CV & CV-EX Section 3 Full System Access Full Access Menu If you selected the MENU key from the first menu screen you 1) Set Time & Date 2) Read/Reset Units can gain full system access. However, you must be a Level 2 3) New Passcodes user.
  • Page 45 Auto-Zone CV & CV-EX Section 3 Programming Date Month Program Time/Date - Enter the Month (1 to 12) Month (1-12): (1-31): - Enter the Day of the Month Year (00-99): (1 to 31) Year - Enter the current Year with 2 digits...

  • Page 46: New Passcodes

    Auto-Zone CV & CV-EX Section 3 New Passcodes Programming Passcodes The System Manager has two levels of user access. Enter New Passcode Level 1..: XXXX Level 2..: XXXX Level 1 users are limited to viewing or changing Zone [Must Be 4 Digits] Temperatures and their Heating and Cooling Setpoints, and to viewing Unit ID numbers for those in alarm conditions.

  • Page 47: Rebuild Alarm Map

    Auto-Zone CV & CV-EX Section 3 Rebuild Alarm Map Rebuilding Screens If you would like the LED Alarm Indicator to function on the Clearing Old Map ....front of your System Manager, you must enable Alarm Polling ....by building an Alarm Map. This map keeps track of which units exist on your communications loop so the System Manager will poll only those units.

  • Page 48: Read/Reset Units

    Auto-Zone CV & CV-EX Section 3 Read/Reset Units Read/Reset Address Entry You must know the Unit ID of the controller you wish to view. Read/Reset Enter Unit ID# This number is created by combining the network loop address Selected Unit: with the CV Controller board address on CV-EX systems.

  • Page 49: Cv Controller Force Modes

    Auto-Zone CV & CV-EX Section 3 CV Controller Force Modes The Constant Volume Units default to the Auto mode of OPERATING MODE 0) Auto 1) Occupied operation when first powered up. Any force modes entered 2) Night 3) Fan Only will be retained in non-volatile memory.

  • Page 50: Cv Controller Read/Reset Operations

    Auto-Zone CV & CV-EX Section 3 CV Controller Read/Reset Operations If the Unit ID you entered found a Constant Volume AHU, the following menus will appear. Any references in this section to CVAHU are referring to the Constant Volume Air Handling Unit or its controller.

  • Page 51: Cv Controller Status

    Auto-Zone CV & CV-EX Section 3 CV Controller Status Line 1 Displays the currently selected CVAHU and its current operating software version on all Status Screens shown below. Status Screen #1 Unoccupied Mode Line 2 - CVAHU # 18 vl.xx...
  • Page 52 Auto-Zone CV & CV-EX Section 3 Status Screen #3 CVAHU # 18 vl.xx Line 2 - Displays the current Supply Air Temperature. Supply Air.: 65.0° Outdoor Air.: 70.2° Line 3 - Displays the current Outdoor Air Temperature. Wetbulb Temp: 0.0°...
  • Page 53 Auto-Zone CV & CV-EX Section 3 Status Screen #6 CVAHU # 18 vl.xx Zone Sensor O.K. Line 2 - Zone Cooling ALARM Bad Zone Sensor! Zone Cooling ALARM Zone Heating ALARM The line will show Zone Sensor OK if none of the above alarm conditions exist.

  • Page 54: Cv Controller Setpoints

    Auto-Zone CV & CV-EX Section 3 CV Controller Setpoints Line 1 displays CVAHU Setpoints message for identification only. Setpoint Screen #1 The Occupied Heating and Cooling Setpoints are entered on CVAHU Setpoints Occupied Setpoints this screen. The Heating Setpoint should always be at least one Cooling Setpt: 75°F...
  • Page 55 Auto-Zone CV & CV-EX Section 3 Setpoint Screen #3 CVAHU Setpoints If the Zone Temperature Sensor has the optional Sensor Slide Slide Effect.: 3°F Adjustment, the maximum effect it can have on the Heating SP Deadband..: 1°F and Cooling Setpoints is programmed here.
  • Page 56 Auto-Zone CV & CV-EX Section 3 Setpoint Screen #5 CVAHU Setpoints The cooling stages must have been off for a minimum amount Minimum On/Off Times of time before they can be activated or re-activated. As each Cool Staging: 4 Min...
  • Page 57 Auto-Zone CV & CV-EX Section 3 Setpoint Screen #8 CVAHU Setpoints Line 2 - The CVAHU can operate the fan in one of two Mode.: Constant modes: Economizer: Enabled Use Left/Right Arrow Continuous or Constant running during occupied hours. Cycle with heating or cooling during occupied hours.
  • Page 58 Auto-Zone CV & CV-EX Section 3 Setpoint Screen #10 CVAHU Setpoints The mechanical heating and cooling can be locked out from Cool Lockout.: 50°F operating based on the Outdoor Air Temperature. If the Heat Lockout.: 65°F Outdoor Air Temperature is above the Heating Lockout, no heating stages are allowed to activate or remain on if they are already ON.
  • Page 59 Auto-Zone CV & CV-EX Section 3 Setpoint Screen #13 The user can set the voltages required to open and close the CVAHU Setpoints Economizer Setpoints damper. Some actuators use a 2-10 VDC signal instead of 0-10 Min Voltage: 0.0 v VDC.

  • Page 60: Cv Controller Scheduling And Holidays

    Auto-Zone CV & CV-EX Section 3 CV Controller Scheduling and Holidays The Constant Volume AHU controllers contain their own built in scheduling capability for calculating Occupied/Unoccupied periods. All schedules are entered in 24-Hour Military Format. See the Constant Volume Menu Operations Screen for information on how to access these programming functions.

  • Page 61: Holidays

    Auto-Zone CV & CV-EX Section 3 Holidays Holiday Day Selection The screens will step through the eleven possible holidays, one Program Holidays Holiday # at a time. Line 2 shows which holiday is currently being Start Mon/Day: programmed. (EX: 101 = Jan. 1) Remember to combine the month and day into a single four digit value.

  • Page 62: Economizer Module (Wetbulb) Read/Reset Operations

    Auto-Zone CV & CV-EX Section 3 Economizer Module (Wetbulb) Read/Reset Operations If the Unit ID you entered was for the Economizer Module, the following menu will appear. Any references in this section to wetbulb are referring to the Economizer Module.
  • Page 63 Auto-Zone CV & CV-EX Section 3 Wetbulb Setpoints Setpoints The only setpoint available for this unit is the Calibration Calibration Offset Offset for the Thermistor Outdoor Air Temperature Sensor. If Outdoor Air..: 77.1 Cal. Offset..: location or other factors are causing the Outdoor Air Temperature reading to be incorrect, the user can adjust the reading up or down with this offset.

  • Page 64: System Manager Keypad Operations Summary

    Auto-Zone CV & CV-EX Section 3 System Manager Keypad Operations Summary vX.XX Friday Operations 03/15/02 09:46 AM Outdoor Air 78.0°F 1) View/Change Zone 2) View Alarms MENU) Full Access ESC) Main Screen SYSTEM ALARM STATUS View/Change Clear Alarms? Enter Unit ID#...
  • Page 65 Section 4 Table of Contents Communications Overview ..........1 How It Works........................1 CV System ........................2 CV-EX System.........................3 CommLink ........................4 MiniLink ..........................5 System Manager.......................6 CV Controller Communications ..................7 CV Controller Address Switches ..................8 CV And CV-EX System Communications Checklist............9 CV Controller Overview ..........10 How It Works.........................10 CV Controller Inputs &...
  • Page 66 Section 4 Table of Figures & Tables Figure 4-1: CV System Communications Wiring ............2 Figure 4-2: CV-EX System Communications Wiring............3 Figure 4-3: CommLink Wiring & Jumper Settings ............4 Figure 4-4: Communications Loop Wiring ..............5 Figure 4-5: System Manager Component Location & Wiring ........6 Figure 4-6: CV Controller Component Locations ............7 Figure 4-7: CV Controller Addressing ................8 Figure 4-8: Typical CV Controller Wiring Diagram...........13...

  • Page 67: Communications Overview

    Auto-Zone CV & CV-EX Section 4 Communications Overview Perhaps no other portion of the system seems as difficult to diagnose as the communica- tions loop, yet it really can be quite simple if you understand how it works. In fact, much of the troubleshooting can be done by simple observation.

  • Page 68: Cv System

    Auto-Zone CV & CV-EX Section 4 CV System The standard CV system has only one communications loop. If you are using the CV-EX System (for systems with more than 30 CV Controllers) please see heading 1.3 CV-EX System. The CommLink II is always the master on the CV system loop. You must be sure the CommLink II is connected and functioning if you are troubleshooting the communications loop.

  • Page 69: Cv-Ex System

    Auto-Zone CV & CV-EX Section 4 CV-EX System See Figure 4-2. The CV-EX system has two communications loops. The loop, which the CV controllers are connected to, is called the Local Loop. The MiniLink is always the loop master on the CV-EX local loop. You must be sure the MiniLink is connected, powered up and functioning if you are troubleshooting the local communications loop.

  • Page 70: Commlink

    Auto-Zone CV & CV-EX Section 4 CommLink As previously described, the CommLink is the local loop master for the CV system and the network loop master for the CV-EX system. For both systems to function the CommLink must be set to the correct operation mode by setting the correct jumper position on the CommLink board.

  • Page 71: Minilink

    Auto-Zone CV & CV-EX Section 4 MiniLink The MiniLink communications interface is only required when you are installing a CV- EX system. It is not required for the CV system. It’s address switch must be set cor- rectly, it must be correctly wired into the system and powered up in order for the CV-EX system to operate correctly.

  • Page 72: System Manager

    Auto-Zone CV & CV-EX Section 4 System Manager The System Manager is the central operator interface for the CV or CV-EX system. It must also be connected correctly to the communications loop in order to view the system status, configure or change setpoints. It must be supplied with 24 VAC power in order to operate.

  • Page 73: Cv Controller Communications

    Auto-Zone CV & CV-EX Section 4 CV Controller Communications One CV controller is required for each Constant Volume AHU unit to be connected to the system. As with the communications devices on the system described previously, it must be wired correctly and it must be connected to 24 VAC power for the system to function.

  • Page 74: Cv Controller Address Switches

    Auto-Zone CV & CV-EX Section 4 CV Controller Address Switches CV Controller Address Switch Values CV Controller Address Switch Setting Address Switch Values Are Not Switch Shown Is Address Switch Values Are Labeled On The CV Controller Added Together When The...

  • Page 75: Cv And Cv-Ex System Communications Checklist

    Auto-Zone CV & CV-EX Section 4 CV And CV-EX System Communications Checklist CV & CV-EX Systems CV Units on each loop are correctly addressed from 1 to 30 Power has been cycled after changing addresses There are no duplicate addresses on the loop...

  • Page 76: Cv Controller Overview

    Auto-Zone CV & CV-EX Section 4 CV Controller Overview How It Works Initialization On system power-up the COMM LED remains extinguished for five seconds. After this delay, the COMM LED will blink out the address of the controller (Address Switch Setting).

  • Page 77: Cv Controller Inputs & Outputs

    Auto-Zone CV & CV-EX Section 4 CV Controller Inputs & Outputs 24 VAC Power Connector This connector provides power to the CV Controller. 24VAC - The “hot” side of the control transformer. GND - The grounded side of the control transformer. If the secondary of the...
  • Page 78 Auto-Zone CV & CV-EX Section 4 Input #5 - This input can be used to monitor an alarm contact closure. If the contact is closed, the alarm is active. Note: All temperature sensors must be Thermistor Type III which provide 77°F @ 10K Ohms Resistance.

  • Page 79: Cv Controller Wiring

    Auto-Zone CV & CV-EX Section 4 CV Controller Wiring CV Controller All Comm Loop Wiring Is Straight Thru Connect To Next Controller And/Or Constant Volume MiniLink On Unit Connections Local Loop RELAY OUTPUTS SHLD COM 1-3 R (24VAC) Local Loop...

  • Page 80: Startup & Commissioning

    Auto-Zone CV & CV-EX Section 4 Startup & Commissioning Commissioning the system correctly is one of the most important steps in getting a system installed and functioning with the least amount of problems and in the shortest length of time.

  • Page 81: Procedures (Continued)

    Auto-Zone CV & CV-EX Section 4 Procedures (Continued) 10) With no power connected, wire controller according to wiring diagrams and in accordance with local codes. Never apply power until you have completed these procedures in accordance to all system instructions.

  • Page 82: Cv-Cv-Ex Worksheets

    Auto-Zone CV & CV-EX Section 4 CV-CV-EX Worksheets Project: ___________________________ Location ___________________________ Stages of Cool: ___ Stages of Heat: ___ Electric Economizer Yes Loop: 1 Remote Link Installed Yes Phone No. ___________ Unit Unit Description or Location Sensor Type Address [S=Sensor] [SO=Sensor w/ Override] [SA=Sensor w/ Setpoint adjust] [SOA=Sensor w/ Override &...

  • Page 83: Troubleshooting

    Auto-Zone CV & CV-EX Section 4 Troubleshooting The following is a guide to assist in troubleshooting the CV and CV-EX systems. It is provided as a systematic approach to determining and resolving common system problems. General Communications No CV Units are communicating ♦...

  • Page 84: Blink Codes

    Auto-Zone CV & CV-EX Section 4 Blink Codes The CV Controller uses an on board LED to indicate various diagnostic conditions during powerup and operation. The CV Unit LED is labeled “COMM”. Starting with power up the LED blink codes are as follows: •...

  • Page 85: Communications Loops

    Auto-Zone CV & CV-EX Section 4 Communications Loops Checking CommLink Local Loop – CV Diagram Overview This test checks for proper loop voltages at the CommLink II. Tip The Loop LED (located on the front panel) should “flicker” when the CommLink II is attempting to communicate.
  • Page 86 Auto-Zone CV & CV-EX Section 4 Diagram The indicated values are typical of a normal system, actual readings may deviate slightly due to the number of units connected and other system specific factors. Note: All of the connected CV Controllers should be powered up for this test.
  • Page 87 Auto-Zone CV & CV-EX Section 4 Checking CommLink Driver – CV Diagram Overview This test checks for proper Comm loop voltages coming from the CommLink II. Tip The Loop LED (located on the front panel) should “flicker” when the CommLink II is attempting to communicate.
  • Page 88 Auto-Zone CV & CV-EX Section 4 Checking CommLink Network Loop – CV-EX Diagram Overview This test checks for proper Network loop voltages at the CommLink II. Tip The Loop LED (located on the front panel) should “flicker” when the CommLink II is attempting to communicate.
  • Page 89 Auto-Zone CV & CV-EX Section 4 Checking CommLink Network Loop – CV-EX Diagram The indicated values are typical of a normal system, actual readings may deviate slightly due to the number of units connected and other system specific factors. Note: All of the connected CV controllers should be powered up for this test.
  • Page 90 Auto-Zone CV & CV-EX Section 4 Checking CommLink Driver – CV-EX Diagram Overview This test checks for proper Network loop voltages coming from the CommLink II. Tip The Loop LED (located on the front panel) should “flicker” when the CommLink is attempting to communicate.
  • Page 91 Auto-Zone CV & CV-EX Section 4 Checking the MiniLink Network Loop – CV-EX Diagram Meter Set To Read DC Volts To Other MiniLinks To Other MiniLinks Or CommLink Or CommLink On The Network Loop On The Network Loop R - to - G...
  • Page 92 Auto-Zone CV & CV-EX Section 4 Checking the MiniLink Network Driver – CV-EX Diagram Meter Set To Read DC Volts To Other MiniLinks To Other MiniLinks Or CommLink Or CommLink On The Network Loop On The Network Loop R - to - G...
  • Page 93 Auto-Zone CV & CV-EX Section 4 Checking the MiniLink Local Loop – CV-EX Diagram Meter Set To Read DC Volts To Other MiniLinks To Other MiniLinks Or CommLink Or CommLink On The Network Loop On The Network Loop MiniLink MiniLink...
  • Page 94 Auto-Zone CV & CV-EX Section 4 Checking the Local Loop at the MiniLink – CV-EX Diagram Meter Set To Read DC Volts To Other MiniLinks To Other MiniLinks Or CommLink Or CommLink On The Network Loop On The Network Loop...
  • Page 95 Auto-Zone CV & CV-EX Section 4 Checking Local Loop at a CV Controller – CV & CV-EX Diagram Meter Set To Read DC Volts The indicated readings are typical of a normal operating system. Actual readings may vary slightly due to the number of units installed and other factors. Any significant deviation from these values generally indicates a problem.
  • Page 96 Auto-Zone CV & CV-EX Section 4 Checking CV Controller Drivers – CV & CV-EX Diagram Meter Set To Read DC Volts Note These tests assume that the CV controller being checked is powered up. Overview This check is intended to determine if the Comm Driver chip on a controller is damaged.

  • Page 97: Cv Controller

    Auto-Zone CV & CV-EX Section 4 CV Controller The following is a guide to assist in troubleshooting the CV controller and its associated CV controller problems. CV Controller Trouble Shooting Checklist Begin troubleshooting by locating the general problem in the list below.

  • Page 98: Room Sensor

    Auto-Zone CV & CV-EX Section 4 Room Sensor Room Sensor Trouble Shooting Checklist Begin troubleshooting by locating the general problem in the list below Room Sensor reading incorrectly • Is the sensor near a source of heat or a cold draft? Location is a common problem.
  • Page 99 Auto-Zone CV & CV-EX Section 4 Temperature Sensor Voltage & Resistance Temperature Resistance Voltage @ Temperature Resistance Voltage @ Input (ºF) (Ohms) Input (VDC) (ºF) (Ohms) (VDC) 93333 4.620 11136 2.695 80531 4.550 10878 2.665 69822 4.474 10625 2.635 60552 4.390...

  • Page 100: Driver Chip Replacement

    Auto-Zone CV & CV-EX Section 4 Driver Chip Replacement Pin 1 MINILINK Comm Driver Chip ( U5 ) Pin 1 COMM Network Loop Comm Driver Chip SHLD Pin 1 COMM REC. CV Controller,CV-C Controller Local Loop GPC Contoller, Wetbulb Controller...
  • Page 101 Only socketed chips may be removed and replaced in the field. All other chips that are not socketed will require sending the board to the WattMaster factory for repair. If you try to remove a chip that is not socketed it will destroy I.C.

  • Page 102: Notes

    Auto-Zone CV & CV-EX Section 4 Notes: 4-36 Start-Up and Troubleshooting firealarmresources.com...
  • Page 103 firealarmresources.com...
  • Page 104 Form: WM-AZC-IO-01B Printed in the USA March 2003 All rights reserved Copyright 2003 WattMaster Controls Inc. • 8500 NW River Park Drive • Parkville, Mo. • 64152 Phone (816) 505-1100 www.wattmaster.com Fax (816) 505-1101 firealarmresources.com...

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