MicroTech II Applied Rooftop Unit Controller

Operation Manual OM 138-1 Group: Applied Systems Part Number: OM138 Date: April 2003 MicroTech II Applied Rooftop Unit Controller Space Comfort Control (SCC) Used with McQuay models: RPS, RFS, RCS, RPR, RFR, RDT, RDS, RAR and RAH Discharge Cooling Disch Air= 55.0 F Clg Capacity= 50% Eff Clg Spt= 55 F 2000 McQuay International

Contents Introduction............................... 4 Getting Started............................ 6 Using the Keypad/Display................................ 6 Menu Structure.................................... 6 Display Format................................... 10 Password Protection............................... 10 Keypad Functions................................. 11 Keypad/Display Exercises.......................... 11 Keypad/Display Menu Reference......................... 13 System Summary................................. 13 Airflow.......................................... 16 Temperature..................................... 17 Humidity........................................ 23 Schedules....................................... 24 Setup/Service.................................... 26 Active Alarms.................................... 40 Previous Alarms.................................. 43 Remote Keypad Display Option...................... 44 Operator s Guide.......................... 45 Determining Unit Status................................ 45 UnitStatus....................................... 45 Clg Capacity..................................... 45 Htg Capacity..................................... 45 Clg Status....................................... 45 Htg Status....................................... 46 Auto/Manual Operation................................. 47 Ctrl Mode....................................... 47 Appl Mode....................................... 47 Occupancy...................................... 48 Occ Mode....................................... 48 OccSrc......................................... 49 Bypass Time (Tenant Override)...................... 50 Emergency Override............................... 50 Scheduling.......................................... 50 Setting Controller Date and Time..................... 51 Internal Daily Scheduling........................... 51 Holiday Scheduling................................ 52 One Event Scheduling............................. 52 Optimal Start..................................... 52 External Time Scheduling........................... 53 Network Time Scheduling........................... 53 Alarm Monitoring...................................... 53 About Alarms.................................... 53 Remote Alarm Indication........................... 55 Local Alarm Indication (Keypad/Display)............... 55 Remote Alarm Clearing............................ 56 Configuring Remote Alarm Output.................... 57 Setting Alarm Limits............................... 58 Unit Configuration/Service Parameters..................... 58 Calibrate Mode................................... 58 Zone (Space) Temperature Sensor................... 59 Miscellaneous Service Parameters................... 59 Control Timer Settings............................. 60 Manual Output Control............................. 61 Description of Operation................... 63 Operating States and Sequences......................... 63 About Operating States............................ 63 Operating State Descriptions........................ 63 Operating State Sequence Chart..................... 66 Startup Control....................................... 66 Before Startup.................................... 66 Fan Startup...................................... 67 Heat/Cool Changeover................................. 67 Temperature Control............................... 68 0-30% Outdoor Air Damper Control....................... 70 Minimum Ventilation Control......................... 70 100% Outdoor Air Damper Control........................ 70 Economizer.......................................... 70 Temperature Control............................... 70 Economizer Changeover Method..................... 71 Minimum Ventilation Control......................... 72 Cooling: Multistage.................................... 74 Temperature Control............................... 74 Low Ambient Cooling Lockout........................ 75 Compressor Staging............................... 75 Condenser Fan Control............................. 78 Circuit Pumpdown................................. 79 Cooling: Modulating.................................... 79 Temperature Control............................... 79 Heating: Multistage.................................... 81 Temperature Control............................... 81 Morning Warm-up Control........................... 81 High Ambient Heating Lockout....................... 82 Discharge Air Low Limit Control...................... 82 Heating: Modulating................................... 83 Temperature Control............................... 83 Morning Warm-up Control........................... 86 High Ambient Heating Lockout....................... 86 Discharge Air Low Limit Control...................... 86 Dehumidification...................................... 87 Enabling Dehumidification........................... 87 Dehumidification Cooling Operation................... 87 Dehumidification Heating Operation................... 88 Energy Recovery...................................... 88 Enthalpy Wheel Control............................. 88 Exhaust Fan Control............................... 89 Energy Recovery Bypass Damper Control.............. 90 Return Fan Capacity Control............................. 90 Direct Building Static Pressure Control................. 91 Return Fan Direct Position Control.................... 91 SAF/RAF Differential OA Reset...................... 91 Propeller Exhaust Fan Control........................... 92 Direct Building Static Pressure Control................. 92 Exhaust Fan Direct Position Control................... 92 Unoccupied Control.................................... 93 Unoccupied Heating (Night Setback).................. 93 Unoccupied Cooling (Night Setup).................... 93 Purge........................................... 94 Alarm Control........................................ 94 Faults........................................... 94 Problems........................................ 95 Warnings....................................... 101 MicroTech II DDC Features................. 103 Direct PID Method.................................... 103 Cascaded PID Method................................ 103 PID Control Parameters............................... 104 Period......................................... 104 Proportional Band and Integral Time.................. 104 Adjusting PID Control Parameters........................ 104 Correcting System Instability ( Hunting )............... 104 Correcting System Sluggishness................... 105 Software Identification and Configuration.... 106 Software Identification................................. 106 Main Control Board (MCB) Configuration.................. 106 Main Control Board (MCB) Data Archiving................. 108 Keypad/Display Objects............................... 108 Troubleshooting......................... 110 2

Document Number: OM138-1 Revision: April 2003 McQuay, MicroTech II, and RoofPak are registered trademarks of McQuay International. Microsoft is a registered trademark of Microsoft Corporation. Windows is a trademark of Microsoft Corporation. Copyright 2003 McQuay International. All rights reserved throughout the world. OM138-1 3

Introduction This manual provides information regarding the MicroTech II control system used in the McQuay RoofPak applied rooftop 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 IM696, MicroTech II Applied Rooftop Unit Controller. For installation and startup instructions and general information regarding a particular rooftop unit, refer to the applicable model-specific installation and maintenance manual (refer to Table 1). Table 1: Model-Specific Rooftop Unit Installation Literature Rooftop Unit Model Installation & Maintenance Data Bulletin Number RPS/RDT/RFS/RCS 015-075C (with Scroll Compressors) IM 738 RPS/RDT/RFS/RCS 070-135C (with Reciprocating Compressors) IM 739 RPR/RFR/RAR (Energy Recovery Units) RDS & RAH IM 487-3 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. WARNING Excessive moisture in the control panel can cause hazardous working conditions and improper equipment operation. When servicing this equipment during rainy weather, the electrical components in the main control panel must be protected from the rain. 4 OM138-1

CAUTION Extreme temperature hazard. 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. WARNING To avoid possible unit damage, Compressor pumpdown is required before removing power to the controller. OM138-1 5

Getting Started The MicroTech II Applied Rooftop Unit Controller is a selfcontained device that is capable of complete, stand-alone 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 Applied Rooftop 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 7, 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, Airflow, 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 13. Figure 1: Keypad/display Discharge Cooling Disch Air= 55.0 F Clg Capacity= 50% Eff Clg Spt= 55 F 6 OM138-1

Figure 2: Keypad Accessible Menu Structure BACK CANCEL Main Menu Keypad Key Definitions System Summary Airflow Temperatures Humidity Schedules Setup/Service Active Alarms Previous Alarms 1 2 3 4 5 6 7 8 Move Display Left Move Edit Cursor Left BACK CANCEL Backup To Previous Menu Cancel Editing Command Move Display Right Move Edit Cursor Right ENTER SAVE Select Menu Save Edited Parameter Move Display Up Increment Adjustable Parameter ALARM Move Display Down Decrement Adjustable Parameter CLEAR ALARM Display Active Alarm Clear Active Alarm 1 2 3 System Occupancy Temperatures Airflow Summary Bldg Pressure Zone Cooling Zone Heating UnitStatus= Clg Capacity= xxx% Htg Capacity= xxx% Clg Status= Htg Status= Ctrl Mode= Off Appl Mode= Heat/Cool Occupancy= Occ Mode= Auto OccSrc= Bypass Time= 0 min Emerg Override= Norm Control Temp= xxx.x F Disch Air= xxx.x F Return Air= xxx.x F Space Temp= xxx.x F OA Temp= xxx.x F Ent Fan= xxx.x F Flow Status= Disch Fan= RF/EF Fan= Fan Operation= Bldg Press= x.xx"wc BldgSP Spt= 0.050"WC BSP Db= 0.010"WC RF/EF Fan Cap= xxx% Control Temp= xxx.x F Clg Capacity= xxx% Eff Clg Spt= xxx.x F Occ Clg Spt= 75.0 F Clg Deadband= 2.0 F CtrlTemp Src= Return Space Temp= xxx.x F UnoccClg Spt= 85.0 F UnoccClgDiff= 3.0 F Clg Status= OATComp Lock= 55 F OATLock Diff= 1 F Control Temp= xxx.x F Htg Capacity= xxx% Eff Htg Spt= xxx.x F Occ Htg Spt= 70.0 F Htg Deadband= 2.0 F CtrlTemp Src= Return Space Temp= xxx.x F UnoccHtg Spt= 55.0 F UnoccHtgDiff= 3.0 F Htg Status= OATHtg Lock= 55 F OATLock Diff= 1 F 4 Discharge Cooling OA Damper Discharge Heating Energy Recovery Dehumidification A Disch Air= xxx.x F Clg Capacity= xxx% Eff Clg Spt= xxx.x F Clg Db= 1.0 F Min Clg Spt= 55.0 F Max Clg Spt= 65.0 F OA Damper Pos= xxx% Eff Min OA Pos= xxx% OA Flow= xxxxxcfm OA Ambient= MinOA Type= None DesignFlow= No MinOA Pos= 10% MinOA Flow= 2000CFM MinOA @Max Sig= 60% Min Signal= 0% Max Signal= 100% MinOAResetMax= 100% Max Fan Diff= 50% Min Fan Diff= 20% Reset T Limit= 0 F EconChgovr= Enthalpy EconChgovrT= 60 F EconChgovrDiff= 1 F Max Purge= 60 min 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= Yes MinDAT Limit= 55.0 F Min Htg Spt= 60.0 F Max Htg Spt= 120.0 F RF/EF Fan Cap= xxx% EF Min Cap= 5% Energy Rec= Yes ER DAT= xxx.x F ER ExhT= xxx.x 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 Sub Menus OM138-1 7

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 Wed= 00:00-00:00 Thu= 00:00-00:00 Fri= 00:00-00:00 Sat= 00:00-00:00 Sun= 00:00-00:00 Hol= 00:00-00:00 Beg= mmm dd@hh:mm End= mmm dd@hh:mm Hol 1=mmmdd-mmmdd Hol 2=mmmdd-mmmdd Hol 3=mmmdd-mmmdd Hol 4=mmmdd-mmmdd Hol 5=mmmdd-mmmdd Hol 6=mmmdd-mmmdd Hol 7=mmmdd-mmmdd Hol 8=mmmdd-mmmdd Hol 9=mmmdd-mmmdd Hol 10=mmmdd-mmmdd Hol 11=mmmdd-mmmdd Hol 12=mmmdd-mmmdd Hol 13=mmmdd-mmmdd Hol 14=mmmdd-mmmdd Hol 15=mmmdd-mmmdd Space Temp= xxx.x F Optimal Start= No Auto Update= Yes Htg Rate= 0.4 F/min Htg OAT= 35 F Hol 16=mmmdd-mmmdd Htg Zero OAT= 0 F Clg Rate= 0.4 F/min Clg OAT= 85 F Clg Zero OAT= 100 F AHU ID= Keypad= Calibrate Mode= No Space Sensor= Yes EFT Sensor= No 2nd P Sensor= None RF/EF Ctrl= Tracking Rem RF/EF Cap= 25% Eng Units= English Operating Hours Timer Settings Time/Date Bldg Static P Setup Exhaust Fan Setup Zone Temp Setup Fan= xxxxx hr Mech Cool= xxxxx hr Comp 1= xxxxx hr Comp 2= xxxxx hr Comp 3= xxxxx hr Comp 4= xxxxx hr Heating= xxxxx hr Economizer= xxxxx hr Bypass= xxxxx hr Dehumidify= xxxxx hr ERecovery= xxxxx hr Service= 0 min Recirculate= 3 min Low DAT= 3 min Max MWU= 90 min Bypass= 120 min Start Init= 180 sec Min Exh On= 120 sec Min Exh Off= 120 sec Time= hh:mm:ss Day= day Date= dd-mmm-yyyy BSP Propbd= 1.0"WC BSP IntTime= 10 sec BSP Period= 5 sec Min Exh Fan Cap= 25% Min OA Dmpr= 5% Min DF Cap= 10% Min Strt Time= 120 sec Min Stop Time= 120 sec Spt Source= Keypad Clg Propbd= 8.0 F Htg Propbd= 12.0 F Clg IntTime= 700 sec Htg IntTime= 500 sec Period= 60 sec Chilled Water Setup Economizer Setup DesignFlow Setup Heating Setup Energy Recovery Setup Dehum Setup Clg Propbd= 30 F Clg IntTime= 60 sec Clg Period= 30 sec Clg Propbd= 30 F Clg IntTime= 60 sec Clg Period= 30 sec Wait Time= 30 sec Stage Time= 5 min Min ExhT Diff= 2 F Dehum Ctrl= Occupied Modband= 50% Max Step= 5.0% F&BP Ctrl= OpenValve F&BP Chgovr= 37 F Stage Time= 5 min Feedback= 3 Wire Deadband= 6.0% Htg Propbd= 20 F Min Off Time= 20 min DH Stage Time= 10 min Feedback= 3 Wire LH Flow= xxx.xx% RH Flow= xxx.xx% AI11 Reference= No Feedback= 3 Wire Max ExhT Diff= 6 F Stage Time= 5 min Minimum Stages= 2 Maximum Stages= 4 Htg IntTime= 120 sec Sensor Loc= Return Htg Period= 60 sec Passwords Timeout= 15min Clear Alarm= No Compressor Setup Lead Circuit= #1 Comp Ctrl= Cross Circ Cond Fan1 Spt= 0 F Cond Fan2 Spt= 55 F Cond Fan3 Spt= 65 F Cond Fan4 Spt= 75 F Cond Fan Diff= 5 F Stage Time= 5 min Manual Control Manual Control= No Discharge Fan= Off RF/EF Fan= Off Fan Operation= Off Alarm= Normal OA Damper= Auto Mod Cooling= Auto Mod Heating= Auto RF/EF Vanes= Auto RF/EF VFD= Auto B Sub Menus (Continued) 8 OM138-1

Figure2: Keypad Accessible Menu Structure (Continued) B Alarm Out Faults Freeze= Fast Smoke= 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 Active Alarm 3 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Previous Alarm 6 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Out Problems Freeze= Slow OAT Sensor= Slow Space Sensor= Slow Return Sensor= Slow Ent Fan Sens= Slow Lo Airflow= Slow Heat Fail= Slow Fan Retry= Slow Hi Press-Ckt1= Slow Hi Press-Ckt2= Slow Lo Press-Ckt1= Slow Lo Press-Ckt2= Slow Frost-Ckt1= Slow Frost-Ckt2= Slow Comp #1 Alm= Slow Active Alarm 4 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Previous Alarm 7 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Comp #2 Alm= Slow Comp #3 Alm= Slow Comp #4 Alm= Slow Comp #5 Alm= Slow Comp #6 Alm= Slow PumpDown-Ckt1= Slow PumpDown-Ckt2= Slow Ckt1 Clg Ena= Slow Ckt2 Clg Ena= Slow GenC Clg Ena= Slow HtgB Htg Ena= Slow Ckt1 Comm Fail= Slow Ckt2 Comm Fail= Slow Genc Comm Fail= Slow HtgB Comm Fail= Slow ERecB Comm Fail= Slow 8 Previous Alarm 1 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Previous Alarm 8 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Out Warnings OA Dmpr Stuck= Off Airflow Switch= Off Dirty Filter= Off Dirty FnlFltr= Off Ckt1 H/W= Off Ckt2 H/W= Off GenC H/W= Off HtgB H/W= Off Previous Alarm 2 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss 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-yy hh:mm:ss 7 Active Alarm 1 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Previous Alarm 4 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Active Alarm 2 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Previous Alarm 5 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Sub Menus (Continued) OM138-1 9

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. Figure 3: LCD Display Format 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 4545. The L-1 password is 6555. Note: Figure 4: Menu Line Item Line Item Line Item Line Blinking Cusor 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 Navigation Indicator Temperatures Disch Air=55.0 F Return Air=73.5 F Space Temp=74.5F Data Field **Enter L-2 Password Password= 5555 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 4. 2. Pressing the Right Arrow key one time moves the blinking cursor to the second 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. 5. 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 11. 10 OM138-1

Keypad Functions The MicroTech II controller keypad consists of 8 pressure sensitive membrane switches. Refer to Figure 1 on page 6. 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. OM138-1 11

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. 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. 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. Note: The data field stops blinking when the new value is recorded and the display leaves the edit mode. Clearing Alarms 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 six 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 blinking (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 10 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% 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 rooftop 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. Note: The time schedule and time clock in the MicroTech II controller use military time. In this case 5:30 p.m. is equivalent to 17:30 in military time. Blinking Data Field Note: 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 12 OM138-1

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. Note: 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 rooftop 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. Note: There are a number of instances where the same menu item appears under more that one menu. System Summary Menus in the System Summary category contain basic unit operating status and control set point parameters. Table 2 on page 15 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 45. OM138-1 13

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 45. 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 45. 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 47. Note: 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 47. Note: This item has no affect on the unit operation unless the Ctrl Mode= item is set to Auto. 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 45. 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 47. OccSrc. OccSrc= 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 47. Bypass Time. Bypass Time= is an adjustable item which indicates the bypass time remaining when the unit is operating due to bypass operation. For detailed information regarding this parameter, refer to Auto/Manual Operation on page 47. Emerg Override. Emerg Override= is an adjustable item which provides a means off 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 47. 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 67. 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 59. Note: 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. Ent Fan. Ent Fan= is a status only item which displays the current temperature reading from the unit entering fan air temperature sensor. This sensor is standard on all units equipped with gas or electric heat. 14 OM138-1

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 UnocClg UnocHtg Man Ctrl Clg Capacity - - 0-100% Htg Capacity - - 0-100% Clg Status - - All Clg Econo Mech Clg Off Amb Off Alm 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 Off 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 OM138-1 15

Table 2: System Summary Menus (Continued) Menu Name Menu Item Name Factory Default Value Field Number Range Occupancy Temperatures Occupancy - - Occ Unocc Bypass Occ Mode Auto 1 Occ Unocc Bypass Auto OccSrc - - None Int Sched Net Sched Occ Mode Remote Sw Bypass Time 0 min 1 0-300 min Emerg Override Norm 1 Norm Off Control Temp - - -50-250.0 F Disch Air - - -50-250.0 F Return Air - - -50-250.0 F Space Temp - - -50-250.0 F OA Temp - - -50-250.0 F Ent Fan - - -50-250.0 F Airflow Menus in the Airflow category contain status and control set point parameters that define the airflow control setup of the unit. Table 3 on page 17 lists all menus and items in the Airflow 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 Airflow category menus and items. Airflow Summary The Airflow Summary menu contains status information related to unit airflow, static pressure and fan operation. Flow Status. Flow 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 Fan. Disch Fan= is a status only item which indicates whether or not the controller is commanding the unit discharge fan on. RF/EF Fan. RF/EF Fan= is a status only item which indicates whether or not the controller is commanding the unit return or exhaust 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 696, MicroTech Applied Rooftop Unit Controller. Bldg Pressure The Bldg Pressure menu contains parameters for controlling building static pressure when a unit is equipped with a building static pressure sensor. For detailed information regarding building static pressure control, refer to Direct Building Static Pressure Control on page 91 or Exhaust Fan Control on page 89. Bldg Press. Bldg Press= is a status only item which indicates the current pressure at the building static pressure sensor location. BldgSP Spt. BldgSP Spt= is an adjustable item which sets the building static pressure set point used for controlling the return air or exhaust fan inlet vanes or VFD. The inlet vanes or VFD is modulated to maintain the building static pressure sensor input at this set point. BSP Db. BSP Db= is an adjustable item which sets a dead band around the BldgSP Spt= parameter in the Bldg Static Pressure menu. No building static pressure control action is taken when the current building static pressure input is within this dead band. RF/EF Fan Cap. RF/EF Fan Cap= is a status only item which indicates the current return or exhaust fan capacity. 0-100% inlet vane position is indicated if the unit is equipped with return or exhaust fan variable inlet vanes. 0-100% of VFD maximum speed is indicated if the unit is equipped with a return or exhaust fan VFD 16 OM138-1

. Table 3: Airflow Menus Menu Name Menu Item Name Factory Default Value Field Number Range Airflow Summary Bldg Pressure Flow Status - - Flow NoFlow Disch Fan - - On Off RF/EF Fan - - On Off Fan Operation - - On Off Bldg Press - - -0.250-0.250 WC BldgSP Spt 0.050 WC 1-0.250-0.250 WC BSP Db 0.010 WC 1 0.001-0.100 WC RF/EF Fan Cap - - 0-100% 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 22 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 67. 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 67. 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 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 68. 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 68. 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 67. 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 59. OM138-1 17

Note: 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 Control on page 93. Note: An optional space temperature sensor is required for unoccupied cooling operation. UnoccClgDiff. UnoccClgDiff= is an adjustable item which sets a differential below 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 45. OATComp Lock. OATComp Lock= is an adjustable item which sets the low outdoor air temperature mechanical cooling lockout point. Mechanical cooling operation is disabled when the outdoor air temperature sensor input falls below this set point. OATLock Diff. OATLock Diff= is an adjustable item which sets a differential above the OATComp Lock= parameter. Mechanical cooling operation is re-enabled when the outdoor air temperature sensor input rises above the OATComp Lock= 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 67. 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 67. 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 68. 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 68. 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 67. 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 59. Note: 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 93. Note: 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 18 OM138-1