MicroTech II Applied Rooftop Unit Controller
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1 Operation Manual OM137-2 Group: Applied Systems Part Number: OM137 Date: March 2004 MicroTech II Applied Rooftop Unit Controller Discharge Air Control (DAC) Used with McQuay models: RPS, RFS, RCS, RPR, RFR, RDT, RPE, RDE, RCE, RDS, RAR and RAH Discharge Cooling Disch Air= 55.0 F Clg Capacity= 50% Eff Clg Spt= 55 F 2004 McQuay International
2 Contents Introduction Getting Started Using the Keypad/Display Menu Structure Display Format Password Protection Keypad Functions Keypad/Display Exercises Keypad/Display Menu Reference System Summary Airflow Temperature Schedules Setup/Service Active Alarms Previous Alarms Remote Keypad Display Option Operator s Guide Determining Unit Status Unit Status Clg Capacity Htg Capacity Clg Status Htg Status Auto/Manual Operation Ctrl Mode Appl Mode Occupancy Occ Mode OccSrc 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 Minimum Ventilation Control % Outdoor Air Damper Control Economizer Temperature Control Economizer Changeover Method Minimum Ventilation Control Cooling: Multistage Temperature Control Low Ambient Cooling Lockout Compressor Staging Air-cooled Condenser Fan Control Evaporative Condenser Fan Control Circuit Pumpdown Cooling: Modulating Temperature Control Heating: One Stage Temperature Control Morning Warm-up Control High Ambient Heating Lockout 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 Discharge Set Point Reset Cooling Discharge Set Point Reset Heating Discharge Set Point Reset Energy Recovery Enthalpy Wheel Control Exhaust Fan Control Energy Recovery Bypass Damper Control Discharge Fan Capacity Control Duct Static Pressure Control Discharge Fan Direct Position Control Post Heat Operation Return Fan Capacity Control VaneTrol Fan Tracking Control Automatic Discharge/Return Fan Balancing Procedure Direct Building Static Pressure Control Return Fan Direct Position Control SAF/RAF Differential OA Reset Propeller Exhaust Fan Control Direct Building Static Pressure Control Exhaust Fan Direct Position Control Unoccupied Control Unoccupied Heating (Night Setback) Unoccupied Cooling (Night Setup) Purge Special Space Sensor Failure Operation 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 PRAC Tuning
3 Software Identification and Configuration Software Identification Main Control Board (MCB) Configuration Main Control Board (MCB) Data Archiving Troubleshooting Document Number: OM 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. OM
4 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 discharge air control (DAC) 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 C (with Scroll Compressors) IM 738 RPS/RDT/RFS/RCS C (with Reciprocating Compressors) IM 739 RPE/RDE/RCE (Evaporative Condenser Units) IM 791 RDS & RAH IM 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 OM-137-2
5 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. OM
6 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 53 sub-menus. Each sub-menu is made up of one or more menu items. The string of 53 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. Note: Only those menus applicable to units with a 1 or 3 in position 1 of the Software Configuration Code are described in this manual. Refer to OM138 for all others. A number of menus and menu items that appear on the unit keypad/display are conditional and may not apply to a specific unit depending on the unit software configuration. The unit software configuration is defined by a Software Configuration Code shown on a label located on the backside of the door upon which the keypad/display is mounted. The Software Configuration Code can also be display via the six menu items in the Config Code menu on the unit keypad\display (refer to Software Identification and Configuration on page 129). The menus and menu items that are shaded in Figure 2 are conditional. A menu or menu item that is conditional includes a reference to the position in the Software Configuration Code upon which its applicability depends. For example, the Duct Pressure menu in Figure 2 includes a notation [14=1 or 2]. This notation means that the Duct Pressure menu (and all its menu items) applied to the specific unit only if position 14 in its Software Configuration Code is a 1 or a 2. Otherwise, the menu or menu item is not applicable to the unit and does not affect its operation. Figure 1: Keypad/display Discharge Cooling Disch Air= 55.0 F Clg Capacity= 50% Eff Clg Spt= 55 F 6 OM-137-2
7 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 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 System Occupancy Temperatures Airflow Summary Duct Pressure [14=1 or 2] Bldg Pressure [15=1,2 or 4] Zone Cooling UnitStatus= Clg Capacity= xxx% Htg Capacity= xxx% Clg Status= Htg Status= Ctrl Mode= Off Appl Mode= Heat/Cool VAV Output= [14=1 or 2] Occupancy= Occ Mode= Auto OccSrc= Tnt Ovrd= 0 min Emerg Override= Norm Control Temp= xxx.x F Disch Air= xxx.x F Return Air= xxx.x F [1=1 or 2] Space Temp= xxx.x F OA Temp= xxx.x F Ent Fan= xxx.x F [9=2,3,4,6,7,A or B] Flow Status= Disch Fan= RF/EF Fan= [15=0,1,2 or 4] Fan Operation= Duct Press= x.xx"wc DuctSP Spt= 1.00"WC DSP Db= 0.08"WC Disch Fan Cap= xxx% RF/EF Fan Cap= xxx% 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= OATClg Lock= 55 F OATLock Diff= 1 F Zone Heating 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 Discharge Cooling Disch Air= xxx.x F Clg Capacity= xxx% Eff Clg Spt= xxx.x F DAT Clg Spt= 55.0 F [1=1 or 3] Clg Db= 2.0 F Min Clg Spt= 55.0 F Max Clg Spt= 65.0 F Clg Reset= None [1=1 or 3] Min Clg Spt@= 0 [1=1 or 3] Max Clg Spt@= 100 [1=1 or 3] OA Damper Evap Condensing Discharge Heating Energy Recovery A [6>0] [19=1 or 2] OA Damper Pos= xxx% [7=1,2,3,4,A,B or C] Eff Min OA Pos= xxx% [7=3 or C] OA Flow= xxxxxcfm [8>0] OA Ambient= [7=3 or C] MinOA Type= None [7=3 or C] DesignFlow= No [8>0] MinOA Pos= 10% [1=1,3,A or C] MinOA Flow= 2000CFM [8>0] Sig= 50% [7=3 or C] Min Signal= 0% [7=3 or C] Max Signal= 100% [7=3 or C] MinOAResetMax= 50% [7=3 or C] Max Fan Diff= 50% [15=1 or 2] Min Fan Diff= 20% [15=1 or 2] Reset T Limit= 0 F [7=3 or C] EconChgovr= Enthalpy [7=3 or C] EconChgovrT= 60 F [7=3 or C] EconChgovrDiff= 1 F [7=3 or C] Max Purge= 60 min [7=3 or C] OA Temp= xxx.x F VFD Speed= xxx% Sump Temp= xxx.x F Min Fan Speed= 25% Min SumpT= 75 F Max SumpT= 85 F Sump Dump Spt= 35 F Stage Time= 10 Min Disch Air= xxx.x F Htg Capacity= xxx% Eff Htg Spt= xxx.x F DAT Htg Spt= F [1=1 or 3] Htg Db= 2.0 F Min DAT Ctrl= Yes MinDAT Limit= 55.0 F [1=0 or 2] Min Htg Spt= 60.0 F Max Htg Spt= F Htg Reset= None [1=1 or 3] Min Htg Spt@= 0 [1=1 or 3] Max Htg Spt@= 100 [1=1 or 3] RF/EF Fan Cap= xxx% EF Min Cap= 5% Energy Rec= Yes ER DAT= xxx.x F ER ExhT= xxx.x F A Sub Menus OM
8 Figure 2: Keypad Accessible Menu Structure (Continued) A 4 Dehumidification [1=0 or 2] 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 Configuration Code Pos # 1-4= x.xxx Pos # 5-8= x.xxx Pos # 9-12= x.xxx Pos # 13-16= x.xxx Pos # 17-20= x.xxx Pos # 21-22= x.x Bldg Static P Setup [15=1,2 or 4] BSP Propbd= 1.0"WC BSP IntTime= 10 sec BSP Period= 5 sec PRAC= No 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 13=mmmdd-mmmdd Hol 14=mmmdd-mmmdd Hol 15=mmmdd-mmmdd Hol 16=mmmdd-mmmdd Space Temp= xxx.x F Optimal Start= No Auto Update= Yes Htg Rate= 0.4 F/min Htg OAT= 35 F Htg Zero OAT= 0 F Clg Rate= 0.4 F/min Clg OAT= 85 F Clg Zero OAT= 100 F AHU ID= Comp Brd 1 ID= [2=1] Comp Brd 2 ID= [2=1, & 3<8] GenCond Brd ID= [3=8] El Ht Brd ID= [9=2] ER Brd ID= [19=1 or 2] Calibrate Mode= No Space Sensor= Yes EFT Sensor= No 2nd P Sensor= None [14=1,2 or 15=1,2 or 4] Passwords Operating Hours Timer Settings Time/Date Duct Static P Setup [14=1 or 2] Timeout= 15 min Clear Alarm= No Fan= xxxxx hr Mech Cool= xxxxx hr [2>0] Comp 1= xxxxx hr [2=1] Comp 2= xxxxx hr [2=1] Comp 3= xxxxx hr [2=1] Comp 4= xxxxx hr [2=1] Comp 5= xxxxx hr [3=6] Comp 6= xxxxx hr [3=6] Heating= xxxxx hr [9>0] Economizer= xxxxx hr [7=3 or C] Tnt Ovrd= xxxxx hr ERecovery= xxxxx hr [19=1 or 2] Service= 0 min Recirculate= 3 min [1=0 or 1] Low DAT= 3 min Max MWU= 90 min [1=0 or 1] Tnt Ovrd= 120 min Start Init= 180 sec Post Heat= 0 min [14=1 or 2] Time= hh:mm:ss Day= day Date= dd-mmm-yyyy DSP Propbd= 6.0"WC DSP IntTime= 40 sec DSP Period= 10 sec PRAC= No Exhaust Fan Setup [15=4] Zone Temp Setup [1=0 or 2] Compressor Setup [2=1 & 3<8] Chilled Water Setup [2=2 or A] Economizer Setup [7=3 or C] 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 Lead Circuit= #1 Comp Ctrl= Cross Circ Clg Method= Average 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 Clg Propbd= 30 F Clg IntTime= 60 sec Clg Period= 30 sec Clg Propbd= 30 F Clg IntTime= 60 sec Clg Period= 30 sec PRAC= No PRAC= No Stage Time= 5 min Feedback= 3 Wire Feedback= 3 Wire DF CapCtrl= DuctPres [14=1 or 2] Remote DF Cap= 25% [14=1 or 2] RF/EF Ctrl= Tracking [15=1,2 or 4] Rem RF/EF Cap= 25% [15=1,2 or 4] Eng Units= English Fan Tracking [14=1 or 2 & 15=1 or 2] DF Max w/oexh= 100% RF@DFMax w/oex=95% DF Min w/oexh= 20% RF@DFMin w/oex=15% DF Max w/exh= 100% RF@DFMax w/ex=60% DF Min w/exh= 20% RF@DFMin w/ex=10% DesignFlow Setup [8>0] Wait Time= 30 sec Modband= 50% Max Step= 5.0% Deadband= 6.0% LH Flow= xxx.xx% RH Flow= xxx.xx% AI11 Reference= No Fan Balance [14=1 or 2 & 15=1 or 2] Fan Balance= Off Set Max w/o Exh= No Set Min w/o Exh= No Set Max w/ Exh= No Set Min w/ Exh= No Rem RF/EF Cap= 25% B Sub Menus (Continued) 8 OM-137-2
9 Figure 2: Keypad Accessible Menu Structure (Continued) B Heating Setup Energy Recovery Setup [19=1 or 2] Stage Time= 5 min [9=2,3,4,6,7,A or B] F&BP Ctrl= OpenValve [9=1] F&BP Chgovr= 37 F [9=1] Htg Propbd= 20 F [9=1,3,4,5,A,B or C] Htg IntTime= 120 sec [9=1,3,4,5,A,B or C] Htg Period= 60 sec [9=1,3,4,5,A,B or C] PRAC= No [9=1,3,4,5,A,B or C] Feedback= 3 Wire [9=3,4,5,A,B or C] Min ExhT Diff= 2 F Max ExhT Diff= 6 F Stage Time= 5 min Min Off Time= 20 min Min Exh On= 120 sec Min Exh Off= 120 sec Alarm Out Warnings Alarm Limits Airflow Switch= Off Dirty Filter= Off Dirty FnlFltr= Off [20=1] Ckt1 H/W= Off [3<8] Ckt2 H/W= Off [3<8] GenC H/W= Off [3=8] HtgB H/W= Off [9=2] Hi Disch Alm= 170 F Lo Disch Alm= 40 F Hi Return Alm= 120 F [1=1 or 3] Previous Alarm 2 Previous Alarm 3 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Dehum Setup [1=0 or 2] Dehum Ctrl= Occupied Minimum Stages= 2 Maximum Stages= 4 DH Stage Time= 10min Sensor Loc= Return Manual Control Manual Control= No Discharge Fan= Off RF/EF Fan= Off [15=0,1,2 or 4] Fan Operation= Off Alarm= Normal OA Damper= Auto [7>0] Mod Cooling= Auto [2=2 or A] Mod Heating= Auto [9=1,5 or C] VAV Output= Heat [14=1 or 2] Disch Vanes= Auto [14=1] RF/EF Vanes= Auto [15=1] Disch VFD= Auto [14=2] RF/EF VFD= Auto [15=2] Alarm Out Faults Freeze= Fast [2=2,A or 9=1,5 or C] Smoke= Fast OAT Sensor= Fast [1=3] Space Sensor= Fast [1=2 or 3] Return Sensor= Fast [1=0 or 1] Disch Sensor= Fast Duct Hi Limit= Fast [14=1 or 2] Hi Return Temp= Fast [1=0 or 1] Hi Disch Temp= Fast Lo Disch Temp= Fast Fan Fail= Fast OA Dmpr Stuck= Fast [1=2 or 3] Alarm Out Problems Freeze= Slow [2=2,A or 9=1,5 or C] OAT Sensor= Slow Space Sensor= Slow [1=0,1 or 3] Return Sensor= Slow [1=0 or 1] Ent Fan Sens= Slow [18=1] Lo Airflow= Slow [9=2,3,4,6,7,A or B] Heat Fail= Slow [9=3,4,6,A or B] Fan Retry= Slow [14=2] Hi Press-Ckt1= Slow [3<8] Hi Press-Ckt2= Slow [3<8] Lo Press-Ckt1= Slow [3<8] Lo Press-Ckt2= Slow [3<8] Frost-Ckt1= Slow [3<8] Frost-Ckt2= Slow [3<8] Comp #1 Alm= Slow [3<8] Comp #2 Alm= Slow [3<8] Comp #3 Alm= Slow [3=4,5,6 or 7] Comp #4 Alm= Slow [3=5,6 or 7] Comp #5 Alm= Slow [3=6] Comp #6 Alm= Slow [3=6] PumpDown-Ckt1= Slow [3<8] PumpDown-Ckt2= Slow [3<8] Ckt1 Clg Ena= Slow [3<8] Ckt2 Clg Ena= Slow [3<8] GenC Clg Ena= Slow [3=8] HtgB Htg Ena= Slow [9=2] Ckt1 Comm Fail= Slow [3<8] Ckt2 Comm Fail= Slow [3<8] Genc Comm Fail= Slow [3=8] HtgB Comm Fail= Slow [9=2] ERecB CommFail= Slow [19=1 or 2] 7 8 Active Alarm 1 Active Alarm 2 Active Alarm 3 Active Alarm 4 Previous Alarm 1 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Previous Alarm 4 Previous Alarm 5 Previous Alarm 6 Previous Alarm 7 Previous Alarm 8 Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Alarm Name Alarm Type dd-mmm-yy hh:mm:ss Sub Menus (Continued) OM
10 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 The L-1 password is 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 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 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 OM-137-2
11 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 cooling discharge air set point is 55 F and is not quite meeting the system cooling requirements. Using the following procedure, the cooling discharge air set point is changed to 53 F. 1. Pressing the Back/Cancel key changes the display back to the main menu if not already there. OM
12 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. 7. Pressing the Down Arrow (-) key once decrements the current DAT Clg Spt= value by a tenth of a degree. Pressing and 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 twice changes the display to the Discharge Cooling menu. The cursor is positioned on the first item within this menu which is the Disch Air= item. 5. Pressing the Down Arrow (-) key three times moves the display down three items in the menu and positions the cursor on the DAT Clg Spt= item. 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 Cooling Capacity=25% Eff Clg Spt=55.0 F DAT Clg Spt=55.0F Blinking Data Field 8. When the DAT Clg Spt= parameter is at the desired value (53.0 F 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. 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. 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. 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. 12 OM-137-2
13 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 16 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 50. OM
14 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 50. 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 50. 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 52. 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 52. Note: This item has no affect on the unit operation unless the Ctrl Mode= item is set to Auto. VAV Output. VAV Output= is a status only item which indicates the status of the VAV Box Output (MCB-B012). This output is provided for field use for interlocking field VAV box operation with the unit heating or cooling operation. This output is OFF (Heat) when the unit is in any heating operating state (including Recirc) and ON (Cool) in any other operating state. For detailed information regarding this output, refer to Operating States and Sequences on page 70 and the Field Wiring section of IM696, MicroTech II Applied Rooftop Unit Controller. 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 50. OccMode. OccMode= 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 52. 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 52. Tnt Ovrd. Tnt Ovrd= is an adjustable item which indicates the tenant override time remaining when the unit is operating due to override operation. For detailed information regarding this parameter, refer to Auto/Manual Operation on page 52. 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 52. Temperatures Menus in the Temperatures menu contain unit temperature status information. 14 OM-137-2
15 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 75. 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 64. 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. OM
16 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 Balance Man Ctrl Clg Capacity % Htg Capacity % 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 VAV Output - - Cool Heat 16 OM-137-2
17 Table 2: System Summary Menus (Continued) Menu Name Menu Item Name Factory Default Value Field Number Range Occupancy Temperatures Occupancy - - Occ Unocc Tnt Ovrd Occ Mode Auto 1 Occ Unocc Tnt Ovrd Auto OccSrc - - None Int Sched Net Sched Occ Mode Remote Sw Tnt Ovrd Time 0 min min Emerg Override Norm 1 Norm Off Control Temp F Disch Air F Return Air F Space Temp F OA Temp F Ent Fan 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 18 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. Duct Pressure The Duct Pressure menu contains parameters that are used to maintain duct static pressure control. For detailed information regarding discharge fan capacity control, refer to Discharge Fan Capacity Control on page 108. Duct Press. Duct Press= is a status only item which indicates the current pressure at the duct static pressure sensor location. When a unit is equipped with two duct static pressure sensors, this item displays the lower of the two sensor readings. Static pressure control is then based on the lower of the two readings. DuctSP Spt. DuctSP Spt= is an adjustable item which sets the duct static pressure set point used for controlling the discharge air fan inlet vanes or VFD. The inlet vanes or VFD is modulated to maintain the duct static pressure sensor input at this set point. DSP Db. DSP Db= is an adjustable item which sets a dead band around the DuctSP Spt= parameter in the Duct Static Pressure menu. No duct static pressure control action is taken when the current duct static pressure input is within this dead band. Disch Fan Cap. Disch Fan Cap= is a status only item which indicates the current discharge fan capacity % inlet vane position is indicated if the unit is equipped with discharge air fan variable inlet vanes % of VFD maximum speed is indicated if the unit is equipped with a discharge air fan VFD. RF/EF Fan Cap. RF/EF Fan Cap= is a status only item which indicates the current return or exhaust fan capacity % inlet vane position is indicated if the unit is equipped OM
18 with return or exhaust fan variable inlet vanes % of VFD maximum speed is indicated if the unit is equipped with a return or exhaust fan VFD. Bldg Pressure The Bldg Pressure menu contains parameters that are used to maintain building static pressure control when a unit is equipped with a building static pressure sensor for controlling the unit return or exhaust fan capacity. For detailed information regarding building static pressure control, refer to Direct Building Static Pressure Control on page 112 or Exhaust Fan Control on page 107. 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 % inlet vane position is indicated if the unit is equipped with return or exhaust fan variable inlet vanes % of VFD maximum speed is indicated if the unit is equipped with a return or exhaust fan VFD. Table 3: Airflow Menus Menu Name Menu Item Name Factory Default Value Field Number Range Airflow Summary Duct Pressure Bldg Pressure Flow Status - - Flow NoFlow Disch Fan - - On Off RF/EF Fan - - On Off Fan Operation - - On Off Duct Press WC DuctSP Spt 1.00 WC WC DSP Db 0.08 WC WC Disch Fan Cap % RF/EF Fan Cap % Bldg Press WC BldgSP Spt WC WC BSP Db WC WC RF/EF Fan Cap % 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 24 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. For detailed information regarding unit heating/cooling changeover, refer to Heat/Cool Changeover on page 75. 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 OM-137-2
19 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 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 operation is enabled. When the current value of the Control Temp= parameter drops below this parameter by more than half the Clg Deadband= parameter cooling operation is disabled. When not being influenced by a network signal, this parameter is set by the controller to same value as the Occ Clg Spt= parameter. Occ Clg Spt. Occ Clg Spt= is an adjustable item used by the controller to set the Eff Clg Spt= parameter. When not being influenced by a network signal, the Eff Clg Spt= is set to this value. 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 decision. 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 75. 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 64. 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 Cooling (Night Setup) on page 114. 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 50. OATClg 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. For detailed information regarding unit heating/cooling changeover, refer to Heat/Cool Changeover on page 75. 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 75. 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 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 operation is enabled. When the current value of the Control Temp= parameter rises above this parameter by more than half the Htg Deadband= parameter heating operation is disabled. When not being influenced by a network signal, this parameter is set by the controller to same value as the Occ Htg Spt= parameter. Occ HtgSpt. Occ Htg Spt= is an adjustable item used by the controller to set the Eff Htg Spt= parameter. When not being influenced by a network signal, the Eff Htg Spt= is set to this value. 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. OM
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