MicroTech II Vertical Self-Contained Unit Controller

Transcription

1 Operation Manual OM 712 Group: Applied Systems Part Number: OM712 Date: February 2002 MicroTech II Vertical Self-Contained Unit Controller Space Comfort Control (SCC) Used with McQuay models: SWP, SWT Discharge Cooling Disch Air= 55.0 F Clg Capacity= 50% Eff Clg Spt= 55 F 2002 McQuay International

2 Content Introduction Getting Started Using the Keypad/Display Menu Structure Display Format Password Protection Keypad Functions Keypad/Display Exercises Keypad/Display Menu Reference System Summary Air/water flow Temperature Schedules Setup/Service Active Alarms Previous Alarms Operator s Guide Determining Unit Status UnitStatus Clg Capacity Htg Capacity Clg Status Htg Status Auto/Manual Operation Ctrl Mode Appl Mode Occupancy Occ Mode Occ Src Tenant Override Emergency Override Scheduling Setting Controller Date and Time Internal Daily Scheduling Holiday Scheduling One Event Scheduling Optimal Start External Time Scheduling Network Time Scheduling Alarm Monitoring About Alarms Remote Alarm Indication Local Alarm Indication (Keypad/Display) Remote Alarm Clearing Configuring Remote Alarm Output Unit Configuration/Service Parameters Calibrate Mode Zone (Space) Temperature Sensor Miscellaneous Service Parameters Control Timer Settings Manual Output Control Description of Operation Operating States and Sequences About Operating States Operating State Descriptions Operating State Sequence Chart Startup Control Before Startup Fan Startup Heat/Cool Changeover Temperature Control % Outdoor Air Damper Control Economizer Temperature Control Economizer Changeover Method (Airside) Economizer Changeover Method (Waterside) Minimum Ventilation Control Cooling: Multistage Temperature Control Compressor Staging Cooling: Modulating Temperature Control Heating: Multistage Temperature Control Morning Warm-up Control High Ambient Heating Lockout Discharge Air Low Limit Control Heating: Modulating Temperature Control Morning Warm-up Control High Ambient Heating Lockout Discharge Air Low Limit Control Dehumidification Enabling Dehumidification Dehumidification Cooling Operation Dehumidification Heating Operation Unoccupied Control Unoccupied Heating (Night Setback) Unoccupied Cooling (Night Setup) Purge Alarm Control Faults Problems Warnings MicroTech II DDC Features Direct PID Method Cascaded PID Method PID Control Parameters Period Proportional Band and Integral Time Adjusting PID Control Parameters Correcting System Instability ( Hunting ) Correcting System Sluggishness Software Identification and Configuration Main Control Board (MCB) Configuration Main Control Board (MCB) Data Archiving Keypad/Display Objects Troubleshooting McQuay, MicroTech II, is a registered trademark of McQuay International. Microsoft is a registered trademark of Microsoft Corporation. Windows is a trademark of Microsoft Corporation. Copyright 2002 McQuay International. All rights reserved throughout the world. 2

3 Introduction This manual provides information regarding the MicroTech II control system used in the McQuay Vertical Self-Contained unit product line. It specifically describes the sequences of operation and programmable options for units with factory equipped space comfort control (SCC) software. It also includes information regarding how to use the keypad/display to enter and display data. For information regarding MicroTech II components, input/output configurations, field wiring options and requirements, and service procedures, refer to IM710, MicroTech II Applied Vertical Self-Contained Unit Controller. For installation and startup instructions and general information regarding a particular vertical self-contained unit, refer to the applicable model-specific installation and maintenance manual (refer to Table 1). Table 1: Model-Specific Vertical Self-Contained Unit Installation Literature Vertical Self-Contained Unit Model Installation & Maintenance Data Bulletin Number SWP ( tons) IM 708 SWT ( tons) IM 709 NOTICE This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with this instruction manual, may cause interference to radio communications. It has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user is required to correct the interference at his own expense. McQuay International disclaims any liability resulting from any interference or for the correction thereof. WARNING Electric shock hazard. Can cause personal injury or equipment damage. This equipment must be properly grounded. Connections and service to the MicroTech II control panel must be performed only by personnel that are knowledgeable in the operation of the equipment being controlled. CAUTION Extreme temperature can cause damage to system components. The MicroTech II controller is designed to operate in ambient temperatures from -20 F to 125 F. It can be stored in ambient temperatures from -40 F to 140 F. It is designed to be stored and operated in relative humidity up to 95% (non-condensing). CAUTION Static sensitive components. A static discharge while handling electronic circuit boards can cause damage to the components. Discharge any static electrical charge by touching the bare metal inside the main control panel before performing any service work. Never unplug any cables, circuit board terminal blocks, relay modules, or power plugs while power is applied to the panel. 3

4 Getting Started The MicroTech II Vertical Self-Contained Unit Controller is a self-contained device that is capable of complete, standalone operation. Information in the controller can be displayed and modified by using the keypad/display in the unit main control panel. The following sections describe how to use the keypad/display. Using the Keypad/Display The keypad/display, shown in Figure 1, is provided with all MicroTech II Vertical Self-Contained Unit Controllers on these units. With the keypad/display, operating conditions, system alarms, control parameters, and schedules can be monitored. After password entry, set points, parameters, and schedules can be edited. Menu Structure The keypad accessible information in the MicroTech II controller is organized in a menu structure to provide quick access. As shown in Figure 2 on page 5, this structure contains 1 main menu and a string of 47 sub-menus. Each submenu is made up of one or more menu items. The string of 47 sub-menus is divided into 8 categories. The main menu has eight items within it that point or provide a bookmark to the first sub-menu within the respective category. The eight categories in the main menu are System Summary, Air/waterflow, Temperature, Humidity, Schedules, Setup/Service, Active Alarms and Previous Alarms. The name of each category generally describes the basic purpose of the menus in the particular group. Complete information regarding the contents of each sub-menu is included in Keypad/Display Menu Reference on page 11. Figure 1: Keypad/display Discharge Cooling Disch Air= 55.0 F Clg Capacity= 50% Eff Clg Spt= 55 F 4

5 Figure 2: Keypad Accessible Menu Structure Main Menu Keypad Key Definitions System Summary BACK CANCEL Air/Water Flow Temperatures Humidity Schedules Setup/Service Active Alarms Previous Alarms Move Display Left One Menu Move Edit Cursor Left One Field BACK CANCEL Backup To Previous Menu Cancel Editing Command - Leave Value Unchanged Move Display Right One Menu Move Edit Cursor Right One Field ENTER SAVE ALARM Select Menu Save Edited Parameter Value Move Display Up One Menu Item Increment Adjustable Parameter One Value Display Active Alarm 1 Menu Move Display Down One Menu Item Decrement Adjustable Parameter One Value CLEAR ALARM Clear Active Alarm Currently In The Display 1 2 Zone Cooling System Occupancy Temperatures Waterflow Summary Airflow Summary Control Temp= xxx.x F UnitStatus= Clg Capacity= xxx% Htg Capacity= xxx% Clg Status= Occupancy= Occ Mode= Auto Occ Src= Tnt Ovrd = 0 min Control Temp= xxx.x F Disch Air= xxx.x F Return Air= xxx.x F Space Temp= xxx.x F Water Flow= Flow Status= Disch Fan= Fan Operation= Clg Capacity= xxx% Eff Clg Spt= xxx.x F Occ Clg Spt= 75.0 F Clg Deadband= 2.0 F Htg Status= Emerg Override= Norm OA Temp= xxx.x F CtrlTemp Src= Return Ctrl Mode= Auto Appl Mode= Heat/Cool Outdr Damper= MAT= xxx.x F EWT= xxx.x F LWT= xxx.x F Head Pressure A Sub Menus HdPres Comp1= HdPres Comp2= Setpoint= 160 psi Space Temp= xxx.x F UnoccClg Spt= 85.0 F UnoccClgDiff= 3.0 F Clg Status= Min EWT= 55 F Min EWT Diff= 3 F Zone Heating Discharge Cooling Waterside Economizer Airside Economizer Discharge Heating Dehumidification Control Temp= xxx.x F Htg Capacity= xxx% Eff Htg Spt= xxx.x F Occ Htg Spt= 70.0 F Htg Deadband= 1.0 F CtrlTemp Src= Return Space Temp= xxx.x F UnoccHtg Spt= 55.0 F Disch Air = xxx.x F Clg Capacity= xxx% Eff Clg Spt= xxx.x F Disch Air= xxx.x F Econo Pos= xxx% EWT= xxx.x F OA Damper Pos= xxx% Eff Min OA Pos= xxx% OA Ambient= Clg Db= 1.0 F EWT Diff= 3 F MinOA Pos= 10% Min Clg Spt= 55.0 F Max Clg Spt= 65.0 F EconChgovr= Dry Bulb EconChgovrT= 60 F EconChgovrDiff= 1 F Max Purge= 60min OA Temp= xxx.x F Disch Air= xxx.x F Htg Capacity= xxx% Eff Htg Spt= xxx.x F Htg Db= 1.0 F Min DAT Ctrl= No Min DAT Limit= Min Htg Spt= 60.0 F Max Htg Spt= F Dehum Status= Rel Humidity= xxx% Dew Point= xx.x F Dehum Method=None RH Setpoint= 50% DewPoint Spt= 50 F RH Db= 2% DewPnt Db= 2 F UnoccHtgDiff= 3.0 F Htg Status= OATHtg Lock= 55 F OATLock Diff= 3 F 5

6 Figure2: Keypad Accessible Menu Structure (Continued) A 5 6 Daily Schedule One Event Schedule Holiday Schedule Optimal Start Unit Configuration Mon= 00:00-00:00 Tue= 00:00-00:00 Beg= mmm dd@hh:mm End= mmm dd@hh:mm Hol 1=mmmdd-mmmdd Hol 2=mmmdd-mmmdd Hol 11=mmmdd-mmmdd Hol 12=mmmdd-mmmdd Space Temp= xxx.x F Optimal Start= No AHU ID= CompB1 ID= Wed= 00:00-00:00 Hol 3=mmmdd-mmmdd Hol 13=mmmdd-mmmdd Auto Update= Yes CompB2 ID= Thu= 00:00-00:00 Hol 4=mmmdd-mmmdd Hol 14=mmmdd-mmmdd Htg Rate= 0.4 F/min KP ID= Fri= 00:00-00:00 Hol 5=mmmdd-mmmdd Hol 15=mmmdd-mmmdd Htg OAT= 35 F Calibrate Mode= No Sat= 00:00-00:00 Sun= 00:00-00:00 Hol 6=mmmdd-mmmdd Hol 7=mmmdd-mmmdd Hol 16=mmmdd-mmmdd Htg Zero OAT= 0 F Clg Rate= 0.4 F/min Space Sensor= Yes MAT Sensor= Yes Hol= 00:00-00:00 Hol 8=mmmdd-mmmdd Clg OAT= 85 F OAT Sensor= Yes Hol 9=mmmdd-mmmdd Clg Zero OAT= 100 F RAT Sensor= Yes Hol 10=mmmdd-mmmdd 2nd P Sensor= None Passwords Operating Hours Timer Settings Time/Date Timeout= 15min Clear Alarm= No Disch Fan= xxxxx hr Mech Cool= xxxxx hr Comp 1= xxxxx hr Comp 2= xxxxx hr Comp 3= xxxxx hr Comp 4= xxxxx hr Comp 5= xxxxx hr Comp 6= xxxxx hr Heating= xxxxx hr Econo Op= xxxxx hr Tenant Ovtd= xxxxx hr Dehum Op= xxxxx hr Service= 0min Recirculate= 3min Low DAT= 3min Max MWU= 90min Tenant Ovrd= 120min Start Init= 180sec Post Heat= 0min Bypass Valve= 300sec Airflow= 60sec LP Alm Delay= 45sec Comp Delay= 30sec Time= hh:mm:ss Day= day Date= dd-mmm-yyyy Chilled Water Setup Economizer Setup Heating Setup Zone Temp Setup Compressor Setup Spt Source= Network Compressor 1= Enable Clg Method= Nearest Clg Propbd= 30 F Clg Propbd= 30 F Stage Time= 10min Clg Propbd= 8.0 F Compressor 2= Enable Clg Stage Time= 5min Clg IntTime= 60sec Htg Propbd= 12.0 F Compressor 3= Enable Lead/Lag= Auto Clg Period= 30sec Clg IntTime= 60sec Clg Period= 30sec Htg Propbd= 20 F Htg IntTime= 240sec Clg IntTime= 700sec Compressor 4= Enable Stage Time= 5min Htg Period= 10sec Htg IntTime= 500sec Compressor 5= Enable Period= 60sec Compressor 6= Enable Flush Econo=No Bypass Vlv Ctrl = Bypass Eng Units= English Head Pressure Setup WRV DB= 10 PSI WRV Propbd= 1 PSI WRV IntTime= 10sec WRV Period= 10sec B Sub Menus (Continued) 6

7 Figure2: Keypad Accessible Menu Structure (Continued) Dehum Setup Dehum Ctrl= Occupied Minimum Stages= 2 Maximum Stages= 4 Sensor Loc= Return Alarm Limits Hi Disch Alm= 170 F Lo Disch Alm= 40 F Hi Return Alm= 120 F Previous Alarm 3 Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Manual Control Alarm Out Faults Alarm Out Problems Manual Control= No Discharge Fan= Off Fan Operation= Off Alarm= Normal Economizer= Auto Bypass Valve= Auto Water Reg Vlv= Auto OA Damper= Close Mod Cooling= Auto Mod Heating= Auto Freeze= Fast Smoke= Fast MAT Sensor= Fast OAT Sensor= Fast Space Sensor= Fast Return Sensor= Fast Disch Sensor= Fast Hi Return Temp= Fast Hi Disch Temp= Fast Lo Disch Temp= Fast Fan Fail= Fast OA Dmpr Stuck= Fast Freeze= Slow MAT Sensor= Slow EWT Sensor= Slow OAT Sensor= Slow Space Sensor= Slow Return Sensor= Slow Heat Fail= Slow Fan Retry= Slow Circ 1 High P= Slow Circ 2 High P= Slow Circ 3 High P= Slow Circ 4 High P= Slow Circ 5 High P= Slow Circ 6 High P= Slow Circ 1 Low P/Frost= Slow Circ 2 Low P/Frost= Slow Circ 3 Low P/Frost= Slow Circ 4 Low P/Frost= Slow Circ 5 Low P/Frost= Slow Circ 6 Low P/Frost= Slow Water Reg Vlv= Slow No Water Flow= Slow Comp#1 MP Alm= Slow Comp#2 MP Alm= Slow Comp#3 MP Alm= Slow Comp#4 MP Alm= Slow Comp#5 MP Alm= Slow Comp#6 MP Alm= Slow CompB1 Clg Ena= Slow CompB2 Clg Ena= Slow CompB1 Com Fail= Slow CompB2 Com Fail= Slow 7 8 Active Alarm 1 Active Alarm 2 Active Alarm 3 Active Alarm 4 Previous Alarm 1 Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Previous Alarm 4 Previous Alarm 5 Previous Alarm 6 Previous Alarm 7 Previous Alarm 8 Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss Alarm Out Warnings Econo Stuck= Off Airflow Switch= Off Dirty Filter= Off CompB1 H/W= Off CompB2 H/W= Off Previous Alarm 2 Alarm Name Alarm Type dd-mmm-yyyy hh:mm:ss 7

8 Display Format The information stored in the MicroTech II controller menu structure can be viewed on the 4-line by 20-character LCD display. The current menu is displayed on the top line and up to three menu items are displayed on the next three lines (refer to Figure 3). The item lines contain one or more data fields that convey varying information. A blinking cursor indicates the current item. There is a navigation indicator on the right side of the top line while in navigation mode. A symbol indicates there are more items in the menu above the current display window. A symbol indicates there are more items in the menu below the current display window. A symbol indicates there are more items in the menu above and below the current display window. The password fields initially has values off 5555 in them. The first field is blinking. For example, to change the password to 4545 and enter the new value, the following procedure is used: 1. Pressing the Down Arrow (-) key one time decrements the first field (blinking) to a value of Pressing the Right Arrow key one time moves the blinking cursor to the second field. Figure 3: LCD Display Format Menu Line Item Line Item Line Item Line Blinking Cusor Navigation Indicator Temperatures Disch Air=55.0 F Return Air=73.5 F Space Temp=74.5F Data Field 3. Again pressing the Right Arrow key one time (the second field will not be changed in this example) moves the blinking cursor to the third field. 4. Pressing the Down Arrow (-) key one time decrements the third field (now blinking) to a value of 4. Password Protection The MicroTech II controller includes password protection to guard against inadvertent control parameter changes. When an attempt is made to change the value of an adjustable parameter with the keypad, the controller prompts the user to enter either the level 2 (L-2) or level 1 (L-1) password depending on the level required for that particular parameter. The L-2 password is The L-1 password is Figure 4: L-2 has a higher level of authority than L-1. The controller prompts for the password by displaying the following: Password Protection Blinking Data Field **Enter L-2 Password Password= Now the four fields should be 4545, the desired password. Pressing the Enter/Save key enters the password. If the correct password is entered, the display returns to the item to be changed and the changeable item field is blinking waiting to be modified. Password Timeout Once the password is entered, the controller allows further changes without prompting the user to enter a password until either the password timer expires or a different password level is required for the particular parameter to be changed. The password timer is adjustable from 2-60 minutes using the Timeout= parameter in the Passwords menu. Clear Alarm Password Normally clearing an active alarm does not require a password entry. This is true if the Clear Alarm= item in the Passwords menu is set to None. However, if this parameter is set to L-1 the controller prompts the user to enter the level 1 password before an alarm can be cleared. If this parameter is set to L-2 the controller prompts the user to enter the level 2 password before an alarm can be cleared. For details regarding alarm clearing, refer to Keypad/Display Exercises on page 9. 8

9 Keypad Functions The MicroTech II controller keypad consists of 8 pressure sensitive membrane switches. Refer to Figure 1 on page 4. The following are descriptions of these keys and their functions. Left Arrow Key: Pressing this key changes the displayed menu one menu to the left while navigating within the menu structure. It also changes the field to be edited one field to the left while editing a parameter value. Right Arrow Key: Pressing this key changes the displayed menu one menu to the right while navigating within the menu structure. It also changes the field to be edited one field to the right while editing a parameter value. Up Arrow (+) Key: Pressing this key changes the displayed menu or menu item up one menu or menu item while navigating within the menu structure. It also increments a changeable parameter one value while editing. Down Arrow (-) Key: Pressing this key changes the displayed menu or menu item down one menu or menu item while navigating within the menu structure. It also decrements a changeable parameter one value while editing. Back/Cancel Key: Pressing this key while navigating within the menu structure changes the displayed menu back to the main menu. While editing a changeable parameter, pressing this key causes the edit session to be terminated and the parameter value reverts to the value it had before beginning the editing session. Pressing this key after having pressed the Alarm key to view an active alarm causes the display to revert to the menu that was in the display prior to pressing the Alarm key. Pressing this key while at the main menu causes a manual password log off and resets the password timer. Enter/Save Key: Pressing this key while viewing a menu on the main menu changes the displayed menu to the first menu of the menu group or category associated with that menu. Pressing this key while viewing a changeable menu item places the keypad into edit mode. The first changeable field for that parameter begins blinking and the top line of the display is replaced with **Edit Mode, indicating the edit mode is activated. Once a parameter is changed in edit mode, pressing this key saves the new parameter value into memory. When the new parameter value is saved, the changeable field or field stops blinking and the **Edit Mode message disappears from the top line of the display, indicating the keypad is no longer in edit mode. Alarm Key: Pressing this key while the red LED above it on the keypad is on changes the displayed menu to the Active Alarm 1 menu. Clear Alarm Key: Pressing this key while any of the active alarm menus are being displayed sends a clear command to clear the alarm. Keypad/Display Exercises The following are three exercises that serve as a guide through some typical keypad operations. Note that often there is more than one way to perform an operation. Changing Set Points In this exercise, assume that the current minimum outdoor air damper position set point is 15%. Using the following procedure, the set point is changed to 10%. 1. Pressing the Back/Cancel key changes the display back to the main menu if not already there. 9

10 2. Assuming the blinking cursor is positioned on the System Summary menu, pressing the Down Arrow (-) key twice changes the cursor position to the Temperature menu. holding the Down Arrow (-) causes the value to decrement rapidly. 3. Pressing the Enter/Save key changes the display to the Zone Cooling menu, the first menu in the Temperatures group of menus. 8. When the MinOA Pos= parameter is at the desired value (10% in this example), pressing the Enter/Save key stores the new setting and terminates the edit session. The data field stops blinking when the new value is recorded and the display leaves the edit mode. Clearing Alarms 4. Pressing the Right Arrow key three times changes the display to the OA Damper menu. The cursor is positioned on the first item within this menu which is the OA Damper Pos= item. In this exercise, assume that a fault alarm exists. This type of alarm shuts down the unit and keeps it off until the alarm is manually cleared. If the conditions that caused the alarm have been corrected, the following procedure is used to clear a fault. 5. Pressing the Down Arrow (-) key four times moves the display down six items in the menu and positions the cursor on the MinOA Pos= item. 1. Pressing the Alarm key while the red LED on the keypad is on (indicating an active alarm condition) changes the displayed menu to the Active Alarm 1 menu which displays the current highest priority alarm. 6. When the Enter/Save key is pressed and if the password timer has expired since the last time the password was entered, the controller prompts the user to enter a password at this point. The procedure outlined above in Password Protection on page 8 must be followed to enter the password. Once the password has been successfully entered, the display enters the edit mode as show below. When the Enter/Save key is pressed and if a password entry is not required, the display simply enters the edit mode as shown below. Menu Line Item Line Being Edited **Edit Mode MinOA Type= None DesignFlow= No MinOA Pos= 15% Blinking Data Field v 2. Pressing the Clear Alarm key sends a clear command to the controller. This clears the alarm and returns the unit to normal operation. Modifying Schedules In this exercise, assume that a change in building occupancy requires the self-contained unit to run from 8:30 a.m. to 5:30 p.m. on Sunday. The current schedule has the unit shut down on Sunday. Using the following procedure, this schedule is changed accordingly. This procedure assumes that the password has previously been entered and the password timer has not expired. The time schedule and time clock in the MicroTech II controller uses military time. In this case 5:30 p.m. is equivalent to 17:30 in military time. The Menu Line has been replaced by the **Edit Mode indication message, the cursor has disappeared and the date field to be edited is blinking. 1. Pressing the Back/Cancel key changes the display to back to the main menu if not already there. 7. Pressing the Down Arrow (-) key once decrements the current MinOA Pos= value by one percent. Pressing and 10

11 2. Assuming the blinking cursor is positioned on the System Summary menu, pressing the Down Arrow (-) key three times changes the cursor position to the Schedules menu. 10. Pressing the Up Arrow (+) key once increments the current stop hour value by one hour. Pressing and holding the Up Arrow (+) causes the value to increment rapidly. 3. Pressing the Enter/Save key changes the display to the Daily Schedule menu, the first menu in the Schedules group of menus. 11. When the stop hour is at the desired value (17 in this example), pressing the Right Arrow key moves the blinking cursor to the stop minute field. 4. Pressing the Down Arrow (-) key six times moves the display down six items in the menu and positions the cursor on the Sun= item. 12. Pressing the Up Arrow (+) key once increments the current stop minute value by one minute. Pressing and holding the Up Arrow (+) causes the value to increment rapidly. 5. When the Enter/Save key is pressed (and if a password entry is not required) the display enters the edit mode with the start hour data field blinking. 6. Pressing the Up Arrow (+) key once increments the current start hour value by one hour. Pressing and holding the Up Arrow (+) causes the value to increment rapidly. 7. When the start hour is at the desired value (08 in this example), pressing the Right Arrow key moves the blinking cursor to the start minute field. 8. Pressing the Up Arrow (+) key once increments the current start minute value by one minute. Pressing and holding the Up Arrow (+) causes the value to increment rapidly. 9. When the start minute is at the desired value (30 in this example), pressing the Right Arrow key moves the blinking cursor to the stop hour field. 13. When the stop minute is at the desired value (30 in this example), pressing the Enter/Save key stores the new Sun= start/stop setting and terminates the edit session. The data field stops blinking when the new value is recorded and the display leaves the edit mode. Keypad/Display Menu Reference The following is a brief description of each menu and menu item within the vertical self-contained MicroTech II menu structure. Tables are included which show every menu, item, and field in the menu structure of the program. These menus and items can all be displayed with the keypad/display. There are a number of instances where the same menu item appears under more than one menu. System Summary Menus in the System Summary category contain basic unit operating status and control set point parameters. Table 2 on page 13 lists all menus and items in the System Summary group or category. The Range column in the table lists all possible values for each item. The factory settings for the adjustable parameters are shown in the Factory Default Value column. The following are brief descriptions of the System Summary category menus and items. System The System menu provides a summary of basic unit status and control items. UnitStatus. UnitStatus= is a status only item which indicates the state in which the unit is currently operating. For detailed information regarding this parameter, refer to Determining Unit Status on page

12 Clg Capacity. Clg Capacity= is a status only item which indicates the percentage of the unit maximum cooling capacity currently operating. Htg Capacity. Htg Capacity= is a status only item which indicates the percentage of the unit maximum heating capacity currently operating. Clg Status. Clg Status= is a status only item which indicates whether or not cooling (economizer and/or mechanical) is currently allowed. If cooling is disabled, the reason is indicated. For detailed information regarding this parameter, refer to Determining Unit Status on page 39. Htg Status. Htg Status= is a status only item which indicates whether or not heating is currently allowed. If heating is disabled, the reason is indicated. For detailed information regarding this parameter, refer to Determining Unit Status on page 39. Ctrl Mode. Ctrl Mode= is an adjustable item which allows the unit to be set for manual off, cooling only, heating only, fan only or auto heating/cooling operation. For detailed information regarding this parameter, refer to Auto/Manual Operation on page 41. If this item is set to Auto, then cooling only, heating only, fan only or auto heating/cooling operation is determined by a network signal as indicated by the Appl Mode= item. Appl Mode. Appl Mode= is a network adjustable item which indicates that the unit is set for network off, cooling only, heating only, fan only or auto heating/cooling operation via a network signal. For detailed information regarding this parameter, refer to Auto/Manual Operation on page 41. This item has no affect on the unit operation unless the Ctrl Mode= item is set to Auto. Outdr Damper. Outdr Damper= is a status only item which indicates whether the unit is currently requesting the outdoor air damper open or closed. Occupancy Menus in the Occupancy menu contain status and control items that relate to unit occupied/unoccupied operation. Occupancy. Occupancy= is a status only item which indicates whether the unit is currently in an occupied, unoccupied, or bypass mode of operation. For detailed information regarding this parameter, refer to Determining Unit Status on page 39. Occ Mode. Occ Mode= is an adjustable item which allows the unit to be set for manual occupied or unoccupied operation, automatic operation based on a time schedule input or manual bypass operation. For detailed information regarding this parameter, refer to Auto/Manual Operation on page 41. Occ Src. Occ Src= is status only item which indicates the input source or function that is responsible for setting the Occupancy= parameter to Occ. For detailed information regarding this parameter, refer to Auto/Manual Operation on page 41. Tenant Override. Tenant Ovrd= is an adjustable item which indicates the Tenant Override time remaining when the unit is operating due to Tenant Override operation. For detailed information regarding this parameter, refer to Auto/Manual Operation on page 41. Emerg Override. Emerg Override= is an adjustable item which provides a means of completely shutting off a unit via a network signal. If this parameter is set to Off the unit can not start based on a time clock or any other means. The only way the unit can be started is to change this parameter to Norm. For detailed information regarding this parameter, refer to Auto/Manual Operation on page 41. Temperatures Menus in the Temperatures menu contain unit temperature status information. Control Temp. Control Temp= is a status only item which displays the current value of the Control Temperature. The Control Temperature is defined as the temperature input selected by the CtrlTemp Src= parameter in the Zone Cooling or Zone Heating menu. For example, if the CtrlTemp Src= parameter is set to Return, then the Control Temp= parameter reads the same value as the Return Air= parameter. For detailed information regarding this parameter, refer to Heat/Cool Changeover on page 61. Disch Air. Disch Air = is a status only item which displays the current temperature reading from the unit discharge air temperature sensor. This sensor is standard on all units. Return Air. Return Air= is a status only item which displays the current temperature reading from the unit return air temperature sensor. This sensor is standard on all units with return air. Space Temp. Space Temp= is a status only item which displays the current space (or zone) temperature reading from the optional unit space air temperature sensor input. Refer to Zone (Space) Temperature Sensor on page 52. If an optional space temperature sensor is not installed, the Space Sensor= item in the Unit Configuration menu should be set to No to disable the alarm function associated with an open circuit at the space temperature sensor input. OA Temp. OA Temp= is a status only item which displays the current temperature reading from the unit mounted outdoor air temperature sensor. This sensor is standard on all units. Mixed Air Temperature. MAT = is a status only item which displays the current temperature reading from the unit mounted mixed air temperature sensor. The sensor is standard on all units. Entering Water Temperature. EWT = is a status only item which displays the current temperature reading from the unit mounted entering water temperature sensor. The sensor is standard on all water-cooled units. Leaving Water Temperature. LWT = is a status only item which displays the current temperature reading from the unit mounted leaving water temperature sensor. The sensor is standard on all water-cooled units. 12

13 Table 2: System Summary Menus Menu Name Menu Item Name Factory Default Value Field Number Range System UnitStatus - - Off Unoc Off Man Off Net Off Sw Off Alm Calib Startup Recirc Fan Only Econo Cooling MWU Heating Min DAT UnocEcon UnocFanO UnocDAT UnocClg UnocHtg Man Ctrl Clg Capacity % Htg Capacity % Clg Status - - All Clg Ena Econo Mech Clg Off Amb Off Alm Off No Flo Off None Off Sw Off Net Off Man Htg Status - - Htg Ena Off Amb Off Alm Off None Off Sw Off Net Off Man Ctrl Mode Auto 1 Off Auto Heat/Cool Heat Only Cool Only Fan Only Appl Mode Heat/Cool 1 Off Heat/Cool Heat Only Cool Only Fan Only Outdr Damper - - Open Close 13

14 Table 2: System Summary Menus (Continued) Menu Name Menu Item Name Factory Default Value Field Number Range Occupancy Temperatures Occupancy - - Occ UnocClg Tnt Ovrd Occ Mode Auto 1 Occ UnocClg Tnt Ovrd Auto Occ Src - - None Int Sched Net Sched Occ Mode Remote Sw Tnt Ovrd 0 min min Emerg Override Norm 1 Norm Off Control Temp F Disch Air F Return Air F Space Temp F OA Temp F MAT F EWT F LWT F Table 3: Air/water flow Menu Name Menu Item Name Factory Default Value Field Number Range Flow Status - - Flow NoFlow Air Flow Summary Disch Fan - - On Off Fan Operation - - On Off Head Pressure Comp psi Head Pressure Head Pressure Comp psi Setpoint 160 psi psi Water Flow Summary Water Flow - - Yes No Air/water flow Menus in the Air/water flow category contain status and control set point parameters that define the air/water flow control setup of the unit. Table 3 on page 14 lists all menus and items in the Air/water flow group or category. The Range column in the table lists all possible values for each item. The factory settings for the adjustable parameters are shown in the Factory Default Value column. The following are brief descriptions of the Air/water flow category menus and items. Water flow Summary The Water flow Summary menu contains status information related to unit water flow. Water Flow. Water Flow = is a status only item that indicates whether or not water flow is detected. Water flow status is sensed by a binary input delivered to the controller by a differential pressure switch (WF1). Head Pressure The Head Pressure menu contains parameters that are used to maintain head pressure control. For detailed information regarding Head Pressure control, refer to Water Regulating Valve Control on page

15 Head Pressure Comp1. HdPres Cmp1= is a status only item that indicates the current refrigerant pressure for circuit #1. Head Pressure Comp2. HdPres Cmp2= is a status only item that indicates the current refrigerant pressure for circuit #2. Head Pressure Setpoint. Setpoint= is an adjustable item which sets the refrigerant setpoint used for controlling the water regulating valve. The water-regulating valve is modulated to maintain the refrigerant pressure. Airflow Summary The Airflow Summary menu contains status information related to unit airflow, static pressure and fan operation. Flow StatusFlow Status= is a status only item that indicates whether or not discharge airflow is detected. Airflow status is sensed by a binary input delivered to the controller by a differential pressure switch (PC7). Disch FanDisch Fan= is a status only item which indicates whether or not the controller is commanding the unit discharge fan on. Fan Operation Fan Operation= is a status only item which indicates the on/off status of the Fan Operation Output (MCB-BO3). For details regarding the Fan Operation Output, refer to the Field Output Signals section of IM 710, MicroTech II Vertical Self-Contained Unit Controller. Temperature Menus in the Temperature category contain status and control set point parameters that define the temperature control setup of the unit. Table 4 on page 19 lists all menus and items in the Temperature group or category. The Range column in the table lists all possible values for each item. The factory settings for the adjustable parameters are shown in the Factory Default Value column. The following are brief descriptions of the Temperature category menus and items. Zone Cooling The Zone Cooling menu primarily contains basic status and control parameters that relate to or affect the unit changeover into cooling operation and control of the space or zone temperature while in cooling operation. For detailed information regarding unit heating/cooling changeover, refer to Heat/Cool Changeover on page 61. Control Temp. Control Temp= is a status only item which displays the current value of the Control Temperature. The Control Temperature is defined as the temperature input selected by the CtrlTemp Src= parameter in the Zone Cooling or Zone Heating menu. For example, if the CtrlTemp Src= parameter is set to Return, then the Control Temp= parameter reads the same value as the Return Air= parameter. For more information regarding this parameter, refer to Heat/Cool Changeover on page 61. Clg Capacity. Clg Capacity= is a status only item which indicates the percentage of the unit maximum cooling capacity currently operating. Eff Clg Spt. Eff Clg Spt= is a status only item which indicates the cooling changeover or zone cooling control set point currently in effect. When the current value of the Control Temp= parameter rises above this parameter by more than half the Clg Deadband= parameter, cooling capacity is increased. When the current value of the Control Temp= parameter drops below this parameter by more than half the Clg Deadband= parameter cooling capacity is decreased. This parameter is either set by the controller to the same value as the Occ Clg Spt= parameter or based on a signal from an optional space temperature sensor with set point adjustment capability. For details regarding the use of thermostat supplied set points, refer to Tstat Source Set Points on page 62. Occ Clg Spt. Occ Clg Spt= is an adjustable item used by the controller to set the Eff Clg Spt= parameter. The Eff Clg Spt= is set to this value when it is not being set based on a signal from an optional space temperature sensor with set point adjustment capability. For details regarding the use of thermostat supplied set points, refer to Tstat Source Set Points on page 62. Clg Deadband. Clg Deadband= is an adjustable item which sets a dead band around the Eff Clg Spt= parameter. For example, if the Eff Clg Spt= parameter is set to 75ºF and the Clg Deadband= parameter is set to 2ºF the dead band around the set point would be from 76.0ºF to 74.0ºF. CtrlTemp Src. CtrlTemp Src= is an adjustable item which selects the temperature sensor input to be used for the unit heating/cooling changeover or zone cooling and heating capacity change decisions. For example, if the CtrlTemp Src= parameter is set to Return, then the Control Temp= parameter reads the same value as the Return Air= parameter. For detailed information regarding this parameter, refer to Heat/Cool Changeover on page 61. Space Temp. Space Temp= is a status only item which displays the current space (or zone) temperature reading from the optional unit space air temperature sensor input. Refer to Zone (Space) Temperature Sensor on page 52. If an optional space temperature sensor is not installed, the Space Sensor= item in the Unit Configuration menu should be set to No to disable the alarm function associated with an open circuit at the space temperature sensor input. UnoccClg Spt. UnoccClg Spt= is an adjustable item which sets the point at which the unit starts up and provides unoccupied cooling (night setup) during unoccupied periods. For detailed information regarding unoccupied cooling operation, refer to Unoccupied Cooling (Night Setup) on page 75. An optional space temperature sensor is required for unoccupied cooling operation. 15

16 UnoccClgDiff. UnoccClgDiff= is an adjustable item which sets a differential above the UnoccClg Spt= parameter. Once activated, unoccupied cooling operation is terminated when the Space Temp= value falls below the UnoccClg Spt= setting by more than this differential. Clg Status. Clg Status= is a status only item which indicates whether or not cooling (economizer and/or mechanical) is currently allowed. If cooling is disabled, the reason is indicated. For detailed information regarding this parameter, refer to Determining Unit Status on page 39. Min EWT. Min EWT= is an adjustable item which sets the minimum allowable entering water temperature. Mechanical Cooling is disabled when the entering water temperature sensor input falls below this setpoint. Min EWT Diff. Min EWT Diff= is an adjustable item which sets a differential above the Min EWT= parameter. Compressor operation is re-enabled when the entering water temperature sensor input rises above the Min EWT= value by more than this differential. Zone Heating The Zone Heating menu primarily contains basic status and control parameters that relate to or affect the unit changeover into heating operation and control of the space or zone temperature while in heating operation. For detailed information regarding unit heating/cooling changeover, refer to Heat/Cool Changeover on page 61. Control Temp. Control Temp= is a status only item which displays the current value of the Control Temperature. The Control Temperature is defined as the temperature input selected by the CtrlTemp Src= parameter in the Zone Cooling or Zone Heating menu. For example, if the CtrlTemp Src= parameter is set to Return, then the Control Temp= parameter reads the same value as the Return Air= parameter. For detailed information regarding this parameter, refer to Heat/Cool Changeover on page 61. Htg Capacity. Htg Capacity= is a status only item which indicates the percentage of the unit maximum heating capacity currently operating. Eff Htg Spt. Eff Htg Spt= is a status only item which indicates the heating changeover or zone heating control set point currently in effect. When the current value of the Control Temp= parameter, falls below this parameter by more than half the Htg Deadband= parameter, heating capacity is increased. When the current value of the Control Temp= parameter rises above this parameter by more than half the Htg Deadband= parameter heating capacity is decreased. This parameter is either set by the controller to same value as the Occ Htg Spt= parameter or based on a signal from an optional space temperature sensor with set point adjustment capability. For details regarding the use of thermostat supplied set points, refer to Tstat Source Set Points on page 62. Occ HtgSpt. Occ Htg Spt= is an adjustable item used by the controller to set the Eff Htg Spt= parameter. The Eff Htg Spt= is set to this value when it is not being set based on a signal from an optional space temperature sensor with set point adjustment capability. For details regarding the use of thermostat supplied set points, refer to Tstat Source Set Points on page 62. Htg Deadband. Htg Deadband= is an adjustable item which sets a dead band around the Eff Htg Spt= parameter. For example, if the Eff Htg Spt= parameter is set to 70ºF and the Htg Deadband= parameter is set to 2ºF the dead band around the set point would be from 68.0ºF to 72.0ºF. CtrlTemp Src. CtrlTemp Src= is an adjustable item which selects the temperature sensor input to be used for the unit heating/cooling changeover or zone cooling and heating capacity change decisions. For example, if the CtrlTemp Src= parameter is set to Return, then the Control Temp= parameter reads the same value as the Return Air= parameter. For detailed information regarding this parameter, refer to Heat/Cool Changeover on page 61. Space Temp. Space Temp= is a status only item which displays the current space (or zone) temperature reading from the optional unit space air temperature sensor input. Refer to Zone (Space) Temperature Sensor on page 52. If an optional space temperature sensor is not installed, the Space Sensor= item in the Unit Configuration menu should be set to No to disable the alarm function associated with an open circuit at the space temperature sensor input. UnoccHtg Spt. UnoccHtg Spt= is an adjustable item which sets the point at which the unit starts up and provides unoccupied heating (night setback) during unoccupied periods. For detailed information regarding unoccupied heating operation, refer to Unoccupied Heating (Night Setback) on page 75. An optional space temperature sensor is required for unoccupied heating operation. UnoccHtgDiff. UnoccHtgDiff= is an adjustable item which sets a differential above the UnoccHtg Spt= parameter. Once activated, unoccupied heating operation is terminated when the Space Temp= value rises above the UnoccHtg Spt= setting by more than this differential. Htg Status. Htg Status= is a status only item which indicates whether or not heating is currently allowed. If heating is disabled, the reason is indicated. OATHtg Lock. OATHtg Lock= is an adjustable item which sets the high outdoor air temperature heating lockout point. Heating operation is disabled when the outdoor air temperature sensor input rises above this set point. 16

17 OATLock Diff. OATLock Diff= is an adjustable item which sets a differential below the OATHtg Lock= parameter. Heating operation is re-enabled when the outdoor air temperature sensor input below the OATHtg Lock= value by more than this differential. Discharge Cooling The Discharge Cooling menu contains parameters that relate to or are used to maintain the discharge temperature when the unit is changed over into cooling operation. For detailed information regarding cooling operation, refer to Heat/Cool Changeover on page 61, Economizer on page 63, Cooling: Multistage on page 66, and Cooling: Modulating on page 69, as applicable. Disch Air. Disch Air = is a status only item which displays the current temperature reading from the unit discharge air temperature sensor. This sensor is standard on all units. Clg Capacity. Clg Capacity= is a status only item which indicates the percentage of the unit maximum cooling capacity currently operating. Eff Clg Spt. Eff Clg Spt= is a status only item which indicates the cooling discharge air temperature set point currently in effect during the Econo operating state or during the Cooling operating state when the unit is equipped with chilled water cooling. Economizer dampers or the chilled water valve is modulated to maintain the unit discharge air temperature at this set point. This Eff Clg Spt= parameter is raised and lowered by the controller as necessary to maintain the Eff Clg Spt= in the Zone Cooling menu. For detailed information regarding economizer and chilled water cooling operation, refer to Economizer on page 63 or Cooling: Modulating on page 69. Clg Db. Clg Db= is an adjustable item which sets a dead band around the Eff Clg Spt= parameter. For example, if the Eff Clg Spt= parameter is set to 55ºF and the Clg Db= parameter is set to 1ºF the dead band around the set point would be from 55.5ºF to 54.5ºF. Min Clg Spt. Min Clg Spt= is an adjustable item which sets a minimum cooling discharge temperature set point used by the controller to limit the discharge air temperature while controlling the space or zone conditions. For detailed information on discharge air temperature control, refer to Economizer on page 63, Cooling: Multistage on page 66 or Cooling: Modulating on page 69 as applicable. Max Clg Spt. Min Clg Spt= is an adjustable item which sets a maximum cooling discharge temperature set point used by the controller to limit the discharge air temperature while controlling the space or zone conditions. For detailed information on discharge air temperature control, refer to Economizer on page 63, Cooling: Multistage on page 66 or Cooling: Modulating on page 69 as applicable. Waterside Economizer Waterside Economizer menu contains parameters that relate to or are used to control the unit waterside economizer valve. For detailed information regarding waterside economizer valve control, refer to Economizer Changeover Method (Waterside) on page 65. Discharge Air Temperature. Disch Air= is a status only item which displays the current temperature reading from the unit discharge air temperature sensor. This sensor is standard on all units. Economizer Position. Econo Pos= is a status only item which indicates the current waterside economizer valve position. Entering Water Temperature. EWT = is a status only item which displays the current temperature reading from the unit mounted entering water temperature sensor. The sensor is standard on all water-cooled units. EWT Diff. EWT Diff= is an adjustable item which sets a differential below the MAT= parameter. Waterside Economizer operation is enabled when the entering water temperature sensor drops below the mixed air temperature sensor by more than this differential. Airside Economizer The OA Damper menu contains parameters that relate to or are used to control the unit outdoor air dampers. For detailed information regarding outdoor air damper control, refer to, 100% Outdoor Air Damper Control on page 63, or Economizer on page 63, as applicable. OA Damper Pos. OA Damper Pos= is a status only item which indicates the current outdoor air damper position. Eff Min OA Pos. Eff Min OA Pos= is a status only item which indicates the minimum outdoor air minimum position set point currently in effect. Economizer dampers are controlled to maintain this position whenever minimum ventilation is required. For detailed information regarding minimum ventilation control, refer to Minimum Ventilation Control on page 69 (economizer units) as applicable. OA Ambient. OA Ambient= is a status only item which indicates whether or not the outdoor air is suitable for free cooling. If it is, Low is displayed. If not, High is displayed. The free cooling decision can be based on either an enthalpy switch input to the controller or on a dry bulb OA temperature set point. This decision is made via the EconChgovr= parameter. For detailed information regarding economizer changeover operation refer to Economizer Changeover Method (Airside) on page 64. MinOA Pos. MinOA Pos= is an adjustable item used by the controller to set the Eff Min OA Pos= parameter. Eff Min OA Pos= Min OA Pos if Eff Min OA Pos is not provided via a network. For detailed information regarding minimum ventilation control, refer to Minimum Ventilation Control on page 66 (economizer units) as applicable. EconChgovr. EconChgovr= is an adjustable item which defines the method used to make the economizer changeover decision. When EconChgovr= is set to Enthalpy, the economizer changeover decision is based on the enthalpy switch 17