single compressor controller installation and service manual
Contents
1. essen E 4 XPRT1 Compressor and Condenser Fan Relay Logic Reversal XPRT1 LED On Off Reversal Logic Modification Diagram ae E5 ES Pressure Transducer Installation Instructions SQ E 7 XPRT1 with Pump Down Logic During Defrost Only Wiring Diagram E 8 XPRT1 with Pump Down Logic During Refrigeration and Defrost Wiring Diagram E 8 SERVICING General System GheckOUt na ete o neo e a cl e X HR KO P E a Service Replacement Part Numbers whe Insertion and Removal Instructions for XPRT1 I O F 2 Rev F SECTION A GENERAL INFORMATION COMPRESSOR DEFROST CPU X1 ASSEMBLY PN 41057 SUCTION PRESSURE CONTACTOR CONTACTOR 5 gt PN 41069 41192 CONDENSER FANS ON SITE ALARM LPTX2 4 o n di 7 CONDENSING PRESSURE PN 41070 41193 Y gt eu HPTX2 4 OIL PRESSURE l PN 41069 41192 T2. LEFT amp DOWN Displays the Password entry screen UP amp RIGHT While the cursor is positioned beside a setting this two key combination will speed the rate of increase in the setting Speed the rate of decrease for changing a setting DOWN amp RIGHT C 1 If the keypad has not been disturbed for more than 5 minutes the display will periodically provide a message for the unfamiliar indicating that pressing the DOWN button will allow review of the other screens If the keypad is not pressed for 5 minutes the display will return to the Main Status screen DISPLAY CONTRAST ADJUSTMENT The XPRT1 has a contrast adjustment potentiometer to maximize the clarity of the display for a particular viewing angle The potentiometer can be accessed by inserting a small flat screwdriver through a 250 diameter hole on the upper left side of the XPRT1 enclosure for the CPU Board See Figure C 1 The potentiometer has a total rotation of approximately 300 Degrees Do not force beyond stops STATUS AND CONFIGURATION SCREENS The display screens are broken into two groups of screens Status and Configuration The Status Screens See Page C 2 contain information and settings that an on site serviceman would normally need to know to perform service on the condensing unit They contain such information as the history logs suction setting defrost times and alarm information The Configuration Screens See Page G4 are u
3. A third option would utilize the 4 probe averaging circuit shown in Figure E 3 for defrost termination Because of the nature of the thermistor TM 1 temperature probes the net effect of the four probe circuit would be to weigh the colder probes slightly heavier than the warmer probes CONDENSING PRESSURE CONTROL The XPRT1 has a condensing pressure transducer and an output relay for controlling the condenser fan However the contact rating for the N C contacts is 1 2 hp Consequently condenser fan loads greater than 1 2 hp will require an external contactor In some applications it may be desirable to control only 1 2 of the fans v As an alternative to using the NC contact the NO contact can be used if wired in parallel with a high limit pressure control s switch If this wiring arrangement is used then the condenser fans must be configured in the Relay Configuration Screen 21C for NO contacts Rev F m EU td et SECTION E INSTALLATION PARTS NEEDED CAUTION CPU X1 Controller PN 41057 1 per refrigeration rack Installer must be trained and experienced serviceman Do not perform any installation or service work on the line XIO1 Input Output Bd PN 41068 1 per XPRT1 Controller voltage components without first removing power CPUX to XIO Cable 3 PN 41071 1 per XPRT1 Controller Do not perform any installation or service work on the XPRT1 without first disconnecting the 24 VAC power 2
4. Down Defrost is that the later will only pump down during defrost whereas Pump Down will control the liquid line solenoid during the refrigeration mode as well as defrost If Pump Down is selected then the Thermostat function will be also enabled DIAGS 0 lt 220 WDOG 9 29C SYSTEM DIAGNOSTICS e This screen contains diagnostic information that in the case of a malfunction of the XPRT1 could provide some clues No mail lt 30C SYSTEM MAIL e _ This screen allows the user to read any mail left on the XPRT1 via remote communications XCOM Rev F CONTROL RELAYS ND STATUS LEDS 194 OA FUSES FO amp F1 OVERRIDE SWITCH SENSOR EDGE CONNECTORS NC NO e a e mn Ne 0 gt ac OVRD AUTO Figure C 2 XIO1 INPUT OUTPUT BOARD OPERATION The XIO1 Input Output board See Figure C 2 provides regulated power to the CPU X1 board It also has the connections for the pressure and temperature sensors The sensors are connected to the XIO1 board using 3 position edge connectors with the contacts located on the bottom of the board Care should be taken not to install the edge connectors upside down The sensors should be marked in such a way that if they are disconnected that they will be put back in the proper location The XIO1 board also has the 4 control relays each having a set of Form C contacts Although the XPRT1
5. Probe TM 2 AVERAGING FOUR TM 1 TEMP SENSORS If it is desired to have one of the XPRT1 s temperature input to represent the average of four TM 1 sensors then wire the sensors to the XPRT1 exactly as shown in Figure E 3 This wiring method will only work with four sensors not 2 3 5 or more sensors NOTE THE TM 1 TEMPERATURE PROBES DO NOT HAVE A POLARITY REQUIREMENT X101 BOARD CONNECT CABLE SHIELD TO ELECTRICAL GROUND FULLY DOCUMENT THE LOCATION OF THE TEMPERATURE SENSOR ON THE GRAY TAG 4 PROBE AVERAGE CIRCUIT Figure E 3 Rev F CONTROL RELAY WIRING The suggested method of wiring the XPRT1 s XIO1 board is shown in Figures E 4 and E 5 If the XPRT1 is being installed on an existing refrigeration rack it is recommended that all non safety controls be removed from the control circuit including the defrost clock to reduce the complexity of the circuitry to the bare minimum If a rack is presently equipped with a case thermostat the wires should be disconnected and labeled Removal of existing controls from the control will help a serviceman to more quickly diagnose the nature of the problem Remove power from all circuits before wiring Adhere to applicable state and local codes The wiring diagram Figure E4 assumes that the Compres sor and the Condenser Fans will be configured for NC con tacts in the XPRT1 configuration screens Leave the Override Switch in the OVRD position until the XPRT
6. below the main status screen They are sequentially accessed by repetitive pressing of the DOWN keypad By the same token if the previous screen is desired pressing the UP button will cause the previous screen to return to the display A reference list of all the screens appears on pages C 2 to C 5 CHANGING SETTINGS The four direction keypads UP DOWN LEFT amp RIGHT can also be used to change XPRT1 settings such as the Cutin setting The settings that can be adjusted using the keypad are indicated on the listing of all Screens by a lt beside the value This indicates that the blinking lt cursor on the display must be positioned beside the setting using the RIGHT key and then the UP and DOWN keypads will increase or decrease the value rather than change the screen displayed Once the setting has been changed to the value desired then the cursor must be moved back to the far left position before the other screens can be displayed All the settings are maintained in non volatile memory The battery located on the CPU X1 is for storing history logs and time only QUICK KEYS Due to the number of different screens there are several quick methods for skipping directly to a particular screen Some are accessed by pressing a dedicated key and others by pressing two keys at the same time A summary PRESSURE SETTINGS Displays the Pressure Setting screen LEFT amp UP Displays the Main Status screen
7. cut off temperature Thermostat Setting 2 on Status Screen 13S the CRX1 Relay energizes which closes the Liquid Line Solenoid allowing the compressor to pump down the evaporator The compressor shuts off when it reaches the Compressor Limit suction pressure setting See Configuration Screen 11C on pg C 4 The solenoid opens again when Thermostat Setting 1 is reached and the CRX1 Relay de energizes See Status Screen 12S on pg C 3 Figure E 7 below shows the wiring diagram With this pump down logic during defrost cycles the CRX1 relay is energized and the Liquid Line Solenoid closes to allow pump down of the evaporator Electric Defrost with a Pump Down Cycle Safety Controls y HHI XPRT1 Input Output Board XIO1 Electric Defrost Interlock Relay JLiquid Line Solenoid pe Contactor Figure E 6 Figure E 7 Pump Down During Refrigeration amp Defrost D Liquid Line A Solenoid RLYPEPSPAPSP2P1 XPRT1 Input Output Board XIO1 E 8 Rev F SECTION F SERVICING GENERAL SYSTEM CHECKOUT 1 If not familiar with the operation specifications and application requirements of the XPRT1 controller then review Sections A E before attempting to service 2 Determine if the supply voltage is correct and that fuses FO and F1 on the XIO1 board are not blown Replace only with exact replacements 303 7AG 1Amp 32V 3 Determine if the problem lies with the XPRT1
8. exploded diagram below for detail YSN NI JOVN 000 7901 6 8 c3 O 0000000 B IMPORTANT NOTE 0 5 Once the etch is cut on the printed circuit board the procedure cannot easily be reversed However jumpers can be reinstalled easily Cut the etch Move the jumper JD at the X mark 2 J5 to one pin only J4 to reverse the Move the jumper to reverse the J4 Compressor shown across pins to ONNNY STOYLNOI HOALIV Cut the etch at the X mark to reverse the Compressor LED Condenser LED LED one pin only to reverse J3 the Condenser LED J3 CPU Boards Mfg Before 11 96 CPU Boards Mfg After 11 96 E 5 Rev F NLIS TIN SNE JY 14H31 LNdX PRESSURE TRANSDUCER INSTALLATION INSTRUCTIONS CAP INSTALLATION 1 TIP CAP AND LINE UP CONNECTOR 2 SLIDE CONNECTOR ONTO X DCR 3 PRESS RUBBER BOOT INTO PLACE WRENCH HERE ONLY NOTES 1 VERIFY THAT THE LABEL ON THE TRANSDUCER INDICATES THAT IT IS THE DESIRED SENSOR 2 VERIFY THAT THE SENSOR CHANNEL CONFIGURED IN THE CONFIGURATION SCREENS IS CONSISTENT WITH THE TYPE OF SENSOR BEING USED 3 MOUNT WITHIN 45 DEGREES OF VERTICAL E 7 Rev F XPRT1 WITH PUMP DOWN LOGIC DURING DEFROST ONLY WIRING DIAGRAM The XPRT1 has the capability to control a refrigeration rack that requires a pump down cycle during defrost only When the Defrost Only option is selected pump down during refrigeration cycles cannot oc
9. hardware or is an application or system problem One clue is to compare the status LED s with the actual compressor condenser fan or defrost status Also compare the indicated system pressures and fixture temperatures from the Status Screens with actual pressures and temperatures e If they agree then the problem probably is in general due to misapplication improper configuration or incorrect settings If all the pressure readings appear to be incorrect then disconnect all transducers and temperature sensors and then connect them up one at a time to determine if they are still reading incorrectly e If only one sensor is incorrect then try the sensor at another location of the same type to determine if it is the sensor or the XPRT1 Notes Pressure transducers can not be re calibrated in the field The 1 thermistor temperature sensor will read approximately 3000 ohms at 77 F Its resistance will increase in a non linear manner with a decrease in temperature Its resistance at 32 F will be approximately 10 000 ohms e If the output does not match compare the status of the CPU X1 s LED s with the status of the LED s on the XIO1 board and then compare the status of the relay to the status of the controlled device Confirm the controlled device is wired correctly Note The status LED s will be reversed between the CPU X1 Board and the XIO1 Board for the Alarm LED and normally for the Compressor and Fan relays as
10. order to read the higher ranges Pressure Transducer Leader plugs into board LPTX2 to LPTX4 Converter Size 1 65 X 0 75 X 0 50 To XIO1 Board Blue Tag NOTE 2 Cable NOTE HPTX2 to HPTX4 Converter will be wired the same but has a yellow tag NOTE A Tywrap cables together to secure Figure E 5 XPRT 1 COMPRESSOR AND CONDENSER FAN RELAY LOGIC REVERSAL The XPRT1 CPU board has LED s to indicate the status of the compressor or condenser fan The display of the correct status is based on the compressor and condenser fan being controlled by the NC set of contacts on the XIO1 board and configured in the XPRT1 software as being NC If it is desired to operate the compressor and condenser fans using the NO contacts of the XIO1 board then the compressor and condenser fan relay status should be changed to NO However this change does not change the logic of the status LEDs on the XPRT1 s CPU board Consequently they will operate in reverse logic to the actual status of the compressor or condenser fan On CPU boards shipped during or after 12 96 the ability to easily reverse the operation of the compressor and condenser status LED s was added The LED logic reversal can be instituted by removing the plug on jumpers located at J6 and JS in the upper left corner when viewed from the component side of the CPU boards For CPU boards shipped prior to 12 96 contact Altech Technical Assistance for
11. when Thermostat Setting 1 is reached and the CRX1 Relay deenergizes See Status Screen 12S on pg C 3 See Figure E 7 on pg E 8 for wiring diagram To enable go to Configuration screen 28C Function Selection and scroll up to PUMP DN press right arrow to enable When PUMP DN is enabled PMP DFR is disabled automatically Rev F SECTION D APPLICATION DEFROST TERMINATION The XPRT1 has several methods of terminating a defrost in addition to a fail safe time and suction pressure The XPRT1 can be set for temperature termination using either Fixture Probe 1 P4 same one used for fixture temperature control or Fixture Probe 2 P5 if the temperature termination point is in a different location than the fixture temperature control Such would be the case if the evaporator fans were shut down during defrost and termination would need to be based on coil temperature Lastly the defrost can be terminated only when both reach or exceed the desired set point If it is desired to terminate defrost only when a series of thermostats have closed then the series circuit can be wired in parallel with either temperature probe P4 or P5 and the defrost termination temperature can be set at 100 When a probe is shorted it will read 215 Consequently the only way the defrost will be terminated short of the fail safe time would be by having all the defrost thermostats close and complete the circuit shorting out the temperature probe D 1
12. 1 has been properly configured See CONTACTOR FILTER INSTALLATION on page E 4 COMPRESSUR SAFETY ia CONTACTOR XPRT1 INPUT OUTPUT BOARD XID1 Figure E 4 SUGGESTED LOCAL ALARM INSTALLATION AND WIRING Installation of a local alarm is optional If not included in the installation specifications skip this section The local alarm does not need to be a bell as shown in Figure E 5 It can be a light or even an automatic dialer e Since the alarm relay uses the normally closed contact a loss of power to any of the XPRT1 s will trigger an alarm SILENCE TIMER Ware CPU XPRT1 INPUT DUTPUT BOARD XIDD Figure E 5 E 3 ALLOWS ON SITE PERSONEL TO SILENCE THE ALARM FOR ONLY TIMED INTERVALS HHH a CONDENSER FANS E OR FAN CONTACTOR La DEFROST CONTACTOR The installation of the Silence Timer is optional but mended Suggested vendor for a 12 hour timer with NC con tacts is Mark Time 90002 MFG Rhodes 203 673 3281 ALARM CAN BE A PELL OR LIGHT OR CAN TRIGGER AN AUTO DIALED ALARM TO OTHER XPRTI ALARM CONTACTS Rev F CONTACTOR FILTER INSTALLATION It is recommended to install the contactor filter as shown below in Figure E 4 on any contactor suspected of causing electrical noise CONTROL RELAY CRX1 CRX4 1 0 1 OR 1 0 e 24 VAC 115 VAC 208 VAC 240 VAC CONTACTOR COIL CONTACTOR FILTER MODEL 41199 Figure E 4 SY
13. 2 lt 16 35 37 188 48 22 24 250 39 Rev F DEFROST TERMIN 10S DEFROST TERMINATION defrost termination temperature indicates which probe s is are used for defrost termination Screen 13C selects method Password required to make changes DEFROST DRAIN lt 5 lt Minutes 11S DRAIN TIME drain period following defrost termination Password required to make changes THERMOSTAT ON 24 F lt 12S THEMOSTAT SETTINGS 1 temperature TEMP1 at which compressor is allowed to run set to lowest setting to disable THERMOSTAT OFF 28 F lt 13S THERMOSTAT SETTINGS 2 temperature TEMP1 at which compressor will be turned off set to lowest setting to disable COMPRESSOR Cutin 20 lt Psi 14S SUCTION SETTING suction pressure cutin setting can be set within the limits set in the Configuration screens CONDENSER FANS Cutin 187 lt Psi 15S HEAD PRESSURE SETTING condensing pressure control setting TIME 17 26 lt WED 07 23 95 lt 16S TIME 8 DATE e present time and date PASSWORD 0 lt 0 lt 0 lt 17S PASSWORD correct password must be set before Configuration Screens can be accessed Rev F XPRT1 CONFIGURATION SCREENS OVERRIDE LENGTH Off lt Minutes 0Ca SOFTWARE OVERRIDE Overrides software to force the compressor and condenser on for the minutes set Low suction high head and oil pressure safety logic is enabled during the software override If minutes set gt 254 the display changes to ON and t
14. 4 VAC Transformer 20VA min 1 per XPRT1 Controller Failure to follow proper procedures could result in damage to the XPRT1 e Transformer Connect Cable PN 41010 1 per XPRT1 Controller Always perform a complete check out when the installation is LPTX4 Low Pressure X dcr PN 41192 1 for suction pressure complete 1 for oil pressure es CONTROLLER MOUNTING AND WIRING e HPTX4 High Pressure X dcr PN 41193 1 condensing pressure The XPRT1 enclosure is designed to be mounted directly to the refrigeration rack preferably at eye level TM 1 Temperature Sensor PN 41061 1 fixture temperature Select a location where condensation from refrigeration lines will nat drip onto it 1 coil or fixture temp Avoid locations in the shadows affects viewing of display og 1 Use the provided drill guide to drill the two mounting holes and TM 1 Sensor Splicing Cable Check Installation the 1 00 diameter wire routing hole Install a grommet in the 1 hole Specifications Connect end of the CPU X1 to XIO Cable to the CPU X1 board as indicated in Fig E 1 Route the cable through the Note An ahead of the quantity indicates that item is optional Han en Tm EE ired i icati ount the X1 using the two provided mounting holes and the number required is system application dependent K Mount the XIO1 board using the Snap Track channel Connect the CPU X1 to XIO Cable to the 1 board Mount and wire the transformer in accorda
15. 5S COMPRESSOR LIMIT Suction 0 lt Psi 110 COMPRESSOR LIMIT e sets the suction level that the compressor will be shut off regardless of fixture temperature or time delays 31 to 40 Psi COMPRESSOR LIMIT Head 275 lt Psi 12C COMPRESSOR LIMIT e the condensing pressure at which the compressor will be shut off regard less of the temperature of the fixture or the status of the time delays 199 to 450 e setto 450 Psi if no condensing X dcr DEFROST TERMIN PROBE TP1 amp 2 lt 13C DEFROST TERMINATION selects which means will be used for termination of defrost can be TP1 TP2 TP1 8 2 or pressure OIL FAILURE 10 lt Psi 14C OIL FAILURE LOGIC e selects the oil failure logic It can be set from 5 Psi to 30 Psi differentials If the oil failure logic is not desired disabled and switch can be selected OIL FAILURE DELAY S 15 lt 15C OIL FAILURE DELAY e compressor will be turned off after this specified time delay in seconds if the oil pressure is below the specified minimum pressure C 4 Version 4 32 OIL FAILURE CYCLE M 15 lt 16C OIL FAILURE RECYCLE sets the time delay before the compressor is allowed to restart after an oil failure range 15 to 20 minutes OIL FAILURE RETRIES 1 lt 17C OIL FAILURE RETRIES e sets the number of oil failure recycles range 0 to 5 UNITS PRES TEMP Psi lt F lt 18C UNITS selects the pressure and temperature units
16. AWG Shielded PVC 120 300 V MOUNTING TRACK 18 3 POS EDGE CONNECTOR 0 2500 B 1 Rev F TM 2 Temperature Sensor Specifications Temperature Range 100 to 350 F Ambient Humidity 0 to 100 RH Tube Material Stainless Steel Weight 0 071 Ib Leads 22 AWG TEFLON 120 300V p CABLE 2 0000 7 3 POS EDGE CONNECTOR 02500 y TM 2A Temperature Sensor Specifications Temperature Range 100 to 350 F Ambient Humidity 0 to 100 RH Tube Material Stainless Steel Weight 0 116 lb Leads 22 AWG TEFLON 300V 10 FT f 3 0000 A x i 1 3 POS EDGE CONNECTOR 0 2600 8 NPT LPTX2 to LPTX4 Converter Ambient Temperature 35 to 115 F Ambient Humidity 0 to 100 RH Conversion 0 100 PSIG to 0 125 PSIG Weight 0 064 Ib Leads 22 AWG PVC 300V 0 5000 0 7500 2 HPTX2 to HPTX4 Converter Ambient Temperature 35 to 115 F Ambient Humidity 100 RH Conversion 0 350 PSIG to 0 450 PSIG Weight 0 064 Ib Leads 22 AWG PVC 300V 0 5000 2 CABI 0 7500 Contactor Filter Specifications Weight 0 019 Ib Leads 18 gauge stranded leads 250 VAC E CRX1 Relay Board Specifications Ambient Tempera
17. DUCER WIRING The pressure transducers should be wired per Figure E 2 Since the cables for both transducers are 10 feet long the transducer plugs should be able to be plugged directly to the XIO1 Board without being spliced If the transducer will require a cable greater than 10 feet splice in only 3 conductor shielded cable Be sure to splice the shields together TM 1 AND TM 2 TEMPERATURE SENSOR INSTALLATION AND WIRING The XPRT1 uses TM 1 thermistor type temperature sensors for measuring fixture temperature See the APPLICATION Section for details on selecting the proper sensor locations Wire the sensors as shown in Figure E 2 e The TM 1 and TM 2 temperature sensors are not polarity sensitive e Do not splice the sensor wire inside a refrigerated fixture Only 18 AWG to 22 AWG shielded cable for extending the sensor wiring The maximum recommended length is 250 ft Do not route wiring along with line voltage wiring E 2 DO NOT MAKE THESE CONNECTIONS IN THE REFRIGERATED SPACE DO NOT ROUTE THESE CABLES IN THE SAME CONDUIT WITH LINE VOLTAGE Figure E 2 It is strongly recommended that the sensor location be fully documented on the gray sensor ID tag located near the end of cable with the edge connector The information should include the location on the XIO1 board and the exact sensor location in the refrigerated fixture P4 Fixture Temperature 1 TM 1 P5 Fixture Temperature 2 TM 1 P6 Demand Cooling
18. NAME lt REACH IN FF lt 2S SYSTEM NAME system name letters are selected by UP and DOWN buttons system name can be as large as 14 characters Version 4 32 3S HISTORY LOGS listing of History Logs for sensors each sensor has 380 entries taken at the time indicated e the log interval is set in the Configuration Screens COMPRESSOR ON lt HOUR 1 54 4S TIME RUN LOG stores previous day in one hour intervals stores previous 40 days on daily basis LS lt ALARM LOGS 12 45 09 21 94 5S ALARM LOGS e each sensor has a high and low alarm point e the last time and date the alarm was triggered is displayed ALARM RESET gt HS HH LO H1 6S ALARM RESET press the RIGHT arrow button to clear alarms e shows current alarms including Override Switch LS LowSuction LH High Suction High Head High Temp 1 High Temp 2 High Demand Cool L2 LowTemp2 LD Low Demand Cool INITIATE DEFROST Press gt 7S MANUAL DEFROST manually initiate and terminate a defrost by pressing the RIGHT arrow button High Oil LS LH L2 LD DEFROST TIMES lt 1 lt 17 30 8S DEFROST SCHEDULES up to 12 selectable daily defrost initiation times Password required to make changes DEFROST LENGTH lt 30 lt Minutes 9S DEFROST LENGTH Fail safe defrost termination time Password required to make changes continued on next page LOGS SUCT HEAD NETOIL TEMP1 TEMP2 CMP TMP CMP ON 2
19. O COMMUNICATIONS 2 NETWORK 8 E E z LPTX2 4 CONNECTION CABLE PN 41072 5 O o z 24 VAC TRANSFORMER OPTIONAL 40203 System Features The XPRT1 is a micro processor based single compressor refrigeration rack controller that has the following features 16 x 2 character English language display e Easy touch four button display control method LED indicators of the compressor fan alarm and defrost 24 VAC Class 2 supply voltage manual override switch remote mounting control relays capacity for multiple XPRT1 controls to be tied to a single telephone modem history log for each sensor The XPRT1 will perform the following e control the refrigeration compressor based on suction pressure condensing pressure oil pressure defrost status refrigerated fixture temperature demand cooling of compressor head e display defrost status and a refrigerated fixture temperature e control the condenser fan based on the condensing pressure control a defrost contactor based on programmed defrost schedules 2 e trigger a local alarm based on user defined conditions prevent excessive compressor or fan cycling by use of user defined time delays ORDER INFORMATION The XPRT1 Controller is ordered as a complete assembly with cables I O relay board and transducers For a typical minimum system for controlling suction pressure and d
20. STEM CONFIGURATION AND START UP PROCEDURE 1 After the XPRT1 is installed go through all the Status and Configuration Screens to set the Clock and to configure the XPRT1 according to the XPRT1 System Configuration and Alarm Form Generally it will be best to start at the top screens and then work your way down the list C 2 through C 5 keeping the Installation and Service Manual available as a reference 2 Review all the readings of the pressure transducers and temperature sensors making sure that they are accurate 3 Review the status of all the outputs on the Screens Determine if they appear to be consistent with the input parameters If they do put the Override switch into the AUTO position to allow the XPRT1 to start controlling the compressor condenser fans and defrost contractor 4 After one hour of operation review the operation of the system by looking at the fixture temperatures and reviewing the history logs Make adjustments as required 5 Review the operation the next day either via the telecommunications or on site Make adjustments as required E 4 PRESSURE X DCR CONVERTER INSTALLATION To convert existing LPTX2 or HPTX2 pressure transducers to higher ranges follow Figure E 5 The LPTX2 to LPTX4 converter changes the O to 100 psi range to a O to 125 psi range The HPTX2 to HPTX4 converter changes the 0 to 350 psi range to a 450 psi range Note that firmware Rev 4 21 or later must be installed in
21. TANT NOTE THE XPRT1 I O Board can operate with EITHER Demand Cooling Logic or Pump Down Logic NOT BOTH AT ONE TIME Operating descriptions for each follow DEMAND COOLING LOGIC If the measured head temperature is above 295 F then the demand cooling relay will be energized This relay controls a solenoid that directs liquid refrigerant into the compressor s head For Demand Cooling Logic use P6 TEMP2 INPUT and RLY Edge Connectors on XIO1 Board PUMP DOWN LOGIC LIQUID LINE SOLENOID The pump down logic uses the P4 TEMP1 and RLY Edge Connectors and operates in 1 of the 2 operational modes shown below 1 Defrost Only Operation When the system goes into Defrost the XIO1 Relay energizes and closes the liquid line solenoid When Defrost has ended the XIO1 Relay deenergizes and the solenoid opens again See Figure E 6 on pg E 8 for wiring diagram To enable go to Configuration screen 28C Function Selection and scroll up to PMP DFR press right arrow to enable When PMP DFR is enabled PUMP DN is disabled automatically 2 Refrigeration amp Defrost Operations When Thermostat Setting 2 See Status Screen 13S on pg C 3 reaches its temperature setting TEMP1 the CRX1 Relay energizes which closes the Liquid Line Solenoid allowing the compressor to pump down the evaporator The compressor shuts off when it reaches the Compressor Limit suction pressure setting See Configuration Screen 11C on pg C 4 The solenoid opens again
22. XPRT1 SINGLE COMPRESSOR CONTROLLER INSTALLATION AND SERVICE MANUAL ALTECH CONTROLS 1545 Industrial Drive Missouri City Texas 77489 281 499 5697 Rev F SECTION A SECTION B SECTION C SECTION D SECTION E SECTION F TABLE OF CONTENTS GENERAL INFORMATION System Features ame nel ea Ordering Information Part Numbers Description SPECIFICATIONS CPU X1 Controller Specifications esee B 1 XIO1 Input Output Relay Board Specifications B 1 LPTX2 LPTX4 Low Pressure 5 B 1 HPTX2 HPTX4 High Pressure Transducers B 1 TM 1 Temperature Sensor Specifications Low Temp Probe B TM 2 Temperature Sensor Specifications High Temp Probe B 2 TM 2A Temperature Sensor Specifications Demand Cooling Probe LPTX2 to LPTX4 Converter esses B 2 HPTX2 to HP TX4 GonVerlter 5 E B 2 Contactor Filter Specifications sorrsursensonssnnsnnsnssnnnnnnnonnnnnnnnsnnennnunnnnnnnnnnnnnnssnnnnsnnsnn B 2 CRX1 Relay Board Specifications sse B 2 OPERATION Display nd Keypads sucre tron nee cr en no ee E nh OR PO EX EXER HX FN EX CES C 1 rtc erre eterne ete n eee aree eder seu C 1 Quick C Display Con
23. cur During defrost the compressor will be turned off based on the Compressor Limit pressure set in Configuration Screen 11C It will be turned back on if the suction pressure exceeds the Compressor Limit setting plus 10 psi and the minimum off time delay selected in Configuration Screen 2C has been satisfied When the refrigeration system utilizes an off cycle defrost no special wiring is necessary However when electric defrost is being utilized a wiring interlock such as that shown in Figure E 6 below may be necessary to prevent overloading of the electrical circuit breaker feeding the refrigeration rack The interlock relay prevents the defrost contactor from being energized when the compressor is operating Three methods of pump down operation can be selected in Configuration Screen 13C 1 3 in addition to the four standard termination methods presently available 4 7 T1 Defrost Termination T2 Defrost Termination T1 8 T2 Defrost Termination Suction Pressure Termination Pump Down w T1 Defrost Termination Pump Down w T2 Defrost Termination Pump Down NOaRON XPRT1 WITH PUMP DOWN LOGIC DURING REFRIGERATION AND DEFROST WIRING DIAGRAM The XPRT1 has the capability to control a refrigeration rack that requires a pump down cycle during refrigeration and defrost operations This option can be configured in place of the Defrost Only option During the refrigeration cycle once the fixture has reached the
24. d XCOM Rev 7 10 or higher to use this transducer R41193 HPTX4 High Pressure Transducer 0 450 psi Note Must have firmware Rev 4 21 or higher and XCOM Rev 7 10 or higher to use this transducer R41013 Memory Back up Battery Rev F INSERTION AND REMOVAL INSTRUCTIONS FOR XPRT1 I O BOARD SNAP TRACK aco NG N NIS Nic CUM CDM CUM 0 BOARD 1 c o m E SNAPTRACK FRONT VIEW Figure F 1 Board with Removal Slots and Snaptrack IT IS NOT NECESSARY TO PUSH OR PULL ON ANY COMPONENTS TO INSERT OR REMOVE THE I O BOARD Before inserting the l O Board into or removing it from the snaptrack locate the REMOVAL SLOTS at the top of the I O Board See Figure F 1 INSERTION INSTRUCTIONS By hand slide the top of the I O Board into the side of the snaptrack with the tension strip See Figure F 2a Use a screwdriver to push the bottom of the I O Board into the side of the snaptrack without the tension strip Press against the board in several places along the bottom until the board snaps into place See Figure F 2b 0 INSERT 1 0 BOARD PRESS SCREWDRIVER INTO ONE SIDE AGAINST OPPOSITE OF THE SNAPTRACK EDGE OF BOARD SEVERAL PLACES UNTIL BOARD SNAPS SIDE VIEW Figure F 2 Use Screwdriver for Insertion REMOVAL INSTRUCTIONS gt Use a screwdriver to remove the I O Board from the snaptrack Place the screwdriver into one of the removal slots See Figure F 3a and rotate unti
25. efrost order Part Number Description 41060 XPRT1 Controller Assembly The XPRT1 Controller Assembly includes the following 41057 CPU X1 Controller 41068 XIO1 Input Output Board 41192 LPTX4 Low Pressure Transducer 0 125 psi 41010 Transformer Connection Cable 8 ft 41071 CPUX to XIO Cable 3 ft 41067 XPRT1 Installation amp Service Manual XPRT1 INPUT OUTPUT BOARD XIO1 PN 41068 Lin PN 41061 3 FIXTURE TEMPERATURE 1 DVRD AUTO TM 1 PN 41061 FIXTURE TEMPERATURE 2 PN 41080 DEMAND COOLING PROBE EXPANSION XPRT1 gt RELAY CABLE PN 41089 DEMAND COOLING LIQUID LINE SOLENOID gg RELAY CRX1 PN 41135 For a total single compressor control package to control suction pressure condenser fans and temperature sensing for either compressor control or defrost termination order Part Number Description 41058 XPRT1 Controller Assembly The XPRT1 Controller Assembly includes the following 41057 CPU X1 Controller 41068 XIO1 Input Output Board 41192 LPTX4 Low Pressure Transducer 0 125 psi 41193 HPTX4 High Pressure Transducer 0 450 psi 41061 TM 1 Temperature Sensor 41010 Transformer Connection Cable 41071 CPUX to XIO Cable 41067 XPRT1 Installation amp Service Manual For electronic lube oil protection a second LPTX4 low pressure transducer PN 41192 must be ordered separately with either the XPRT1 PN41060 or the XPRT1 PN 41058 Other parts cable
26. he compressor and condenser stay on continuously until override setting is set below 255 COMPRESSOR CYCLE 6 lt Minutes 1C COMPRESSOR CYCLE total compressor cycle time ON OFF COMPRESSOR OFF 25 lt Seconds 2C COMPRESSOR MIN OFF TIME sets the minimum off time CONDENSER FAN On 30 lt Seconds 3C CONDENSER FAN MIN ON TIME sets the minimum ON time of the fan CONDENSER FAN Off 30 lt Seconds 4C CONDENSER FAN MIN OFF TIME sets the min fan OFF time COMPRESSOR Cutout 16 lt Psi 5C SUCTION SETTING sets the differential 11 psig max between the Cutin and the displayed Cutout setting COMPRESSOR CUTIN MIN 15 lt Psi 6C MINIMUM SUCTION SETTINGS e sets the minimum suction cutin setting allowed to be set in the Suction Setting Screen 14S COMPRESSOR CUTIN MAX 35 lt Psi 7C MAXIMUM SUCTION SETTINGS e sets the maximum suction cutin setting allowed to be set in the Suction Setting Screen 14S CONDENSER FAN Cutout 171 lt Psi 8C CONDENSING PRESSURE SETTINGS sets the differential between the condenser fan Cutin 70 psig max setting and the displayed Cutout setting CONDENSER CUTIN MIN 149 lt Psi 9C CONDENSING PRESSURE LIMITS sets the minimum condenser fan Cutin setting allowed to be set in the Head Pressure Screen 15S CONDENSER CUTIN MAX 250 lt Psi 10C CONDENSING PRESSURE UNITS sets the maximum condenser fan Cutin setting allowed to be set in the Head Pressure Screen 1
27. instructions on how your boards could have the LED logic reversed Note If NO contacts are selected then operation of the Override Switch will cause the compressor and condenser fan to be turned off CAUTION lt is strongly recommended that both the compressor and condenser fan be configured the same Both as NC s or NO s Power unit off before making modifications Rev F XPRT1 LED ON OFF REVERSAL Logic Modification Diagram The following procedure describes how to reverse the operation of the condenser fan J5 and compressor J6 LEDs on the XPRTI front panel Currently the LED is ON and the equipment is ON when the relay is deenergized Normally Closed NC configuration By cutting the printed circuit etch at the designated place or removing the appropriate jumper on the CPU board the operation of the corresponding LED will be ON and the equipment will be ON when the relay is energized Normally Opened NO configuration PROCEDURE TERMINAL BOARD SS Locate the jumpers J5 amp J6 on the XPRT CPU board See diagram on left On boards manufactured before 11 96 cut the printed circuit etch between the two pins on J5 to reverse the condenser LED On boards manufactured after 11 96 remove the jumper between the two pins on J5 See exploded diagram below for detail Cut the printed circuit etch or remove the jumper between the two pins on J6 to reverse the compressor LED See
28. l that side of the board is free from the snaptrack Place the screwdriver into the other removal slot and rotate until top of the board is entirely free from the snaptrack See Figure F 3b gt By hand remove the I O Board from the snaptrack INSERT SCREWDRIVER INTO REMOVAL SLOTS ROTATE 2d SCREWDRIVER TO RELEASE 1 0 BOARD FROM SNAPTRACK SIDE VIEW bh SIDE VIEW Figure F 3 Use Screwdriver in Removal Slots SIDE OF SNAPTRACK WITH TENSION STRIP SIDE OF SNAP TRACK WITHOUT TENSION STRIP Rev F
29. nce with all applicable codes Wire as shown in Figure E 1 1 00 DIA GROMMET CPUX TO XIO CABLE PN 41071 CPU X1 ASSEMBLY PN 41057 ee hr een TRANSFORMER CONNECT CABLE S PN 410105 n Wo SS XIO1 BOARD AS Y PN 41068 24 VAC CLASS 2 TRANSFORMER PN 40203 Figure E 1 E 1 Rev F Suction Pressure CH Condenser Pressure LPTX TM 1 Fixture Temperature 1 XPRT1 INPUT OUTPUT BOARD XIO1 G pS HPTX Ne Nem Nom amp d comD Fixture Temperature 2 Oil Pressure Eo LPTX Install the Edge Connector with the Contacts Down Fully Document the Location of the Temperature Sensor on the Gray Tag Connect Cable Shield to Electrical Ground Demand Cooling Probe PRESSURE TRANSDUCER INSTALLATION Mount the pressure transducer into a 1 8 female pipe thread fitting positioned such that the transducer will not trap oil and is protected from excessive vibration The transducer should be wrenched only on the stainless steel stem Confirm which transducers are to be installed and verify that the proper transducer is being installed at that location LPTX2 or LPTX4 HPTX2 or HPTX4 LPTX2 or LPTX4 P1 Suction Pressure P2 Condensing Pressure P3 Oil Pressure It is strongly recommended that the XIO1 s connector number be noted on the gray transducer ID tag located near the end with the edge connector PRESSURE TRANS
30. nsing pressure is controlled by cycling the condenser fans If the pressure gets above a maximum setting then the compressor will be turned off until the condensing pressure falls within the correct range The control logic has provisions for selecting minimum on and minimum off times for the condenser fans DEFROST LOGIC The XPRT1 can initiate up to 12 defrosts per day The termination can be either the fail safe time P4 temperature discharge air P5 coil temperature for fixtures that turn the fans off during defrost P4 and P5 both must be satisfied or suction pressure A drain time after the termination can be programmed in See the Application Section for more information on selecting the defrost termination method The time in the XPRT1 will not continue to be updated while no power is supplied to the control The time will pick up where it left off at the start of the power ailure OIL PRESSURE LOGIC If the oil pressure logic is enabled the oil pressure differential will be monitored If low oil pressure is detected for the set time delay the compressor will be turned off for the specific recycle time After the recycle time has elapsed the compressor will be allowed to restart for only the number of re tries set in the Oil Failure Retry screen 17C Retries can be set from 0 to 5 After the retries have been used up the compressor can only be restarted by an on site service person clearing the Alarm Reset screen 6S IMPOR
31. o the Configuration Screens It is shipped from the factory with the password set as all 0 s the values under RSETS are the number of resets the XPRT1 has had since the last time it was cleared TEMP2 RANGE lt HI TEMP 24C TEMP2 RANGE SELECTION Sets a high or low temperature range for Temp2 sensor low range temperatures 40 to 112 F high range temperatures 100 to 350 F SUCTION SENSOR LPTX2 lt 25C SUCTION TRANSDUCER SELECTION Sets the type of transducer used to measure the suction pressure LPTX2 or LPTXA defaults to LPTX4 HEAD SENSOR HPTX2 lt 26C HEAD TRANSDUCER SELECTION Sets the type of transducer used to measure head pressure HPTX2 or HPTX4 defaults to HPTX4 OIL SENSOR LPTX2 lt 27C OIL TRANSDUCER SELECTION Sets the type of transducer used to measure oil pressure LPTX2 LPTX4 Level Alarm Cls on pres rise Opn on pres rise NOTE Level alarm is an alarm ONLY and does not trigger oil failure logic FUNCTION SELECT THRMOST lt ENABL D 28C FUNCTION SELECTION e Allows the following logic functions to be disabled enabled Pump Down Defrost Pump Down Demand Cooling Condenser Control Oil Pressure Logic Defrost Control Thermostat Status and Configuration screens involving disabled functions will not appear on unit e Only one of the following functions can be enabled at one time Pump Defrost Pump Down Demand Cool The difference between Pump Down and Pump
32. perating Ambient 35 to 115 Deg F Communication Port 1 RS 422 Ambient Humidity 0 to 95 RH Weight 1 0 Ib Body Material Brass Enclosure 14 GA Stainless Steel Weight 0 4 Ib Leads 22 AWG Shielded PVC 300 V Refrigerants All CFC HFC and HCFC Refrigerants 120 CABLE 125 DIA X 3 00 LONG II ene DIA 3 POS CONNECTOR 1 8 NPT REMOVABLE RUBBER CONNECTOR HPTX2 HPTX4 High Pressure Transducers XIO1 Input Output Relay Board Specifications HPTX2 Measurement Range 0 to 350 PSIG Ambient Temperature 45 to 125 Deg F HPTX4 Measurement Range 0 to 450 PSIG Ambient Humidity 0 to 90 RH Maximum Pressure 750 PSIG Power Requirements 15 VA 24 VAC Operating Ambient 35 to 115 Deg F Pressure Inputs 3 Each Suction Oil amp Cond Ambient Humidity 0 to 95 RH Temperature Inputs 2 Each Fixture amp Defrost Body Brass Weight 0 5 Ib Weight 0 4 Ib Number of Relays 4 Each Compressor Fan Defrost and Leads 22 AWG Shielded PVC 300 V Alarm Refrigerants All CFC HFC and HCFC Refrigerants Contact Arrangement 1 Form C per relay Contact Rating 100 VA Pilot Duty 240V 120 CABLE 1125 DIA X 3 00 LONG 250 QUICK DISCONNECT FORM C RELAY 2 3 POS CONNECTOR 1 8 NPT REMOVABLE RUBBER CONNECTOR 7 00 170 TM 1 Temperature Sensor Specifications Temperature Range 40 to 112 F Ambient Humidity 0 to 100 RH Tube Material Stainless Steel 185 X 600 SLOTS Weight 0 1930 Ib Leads 22
33. revents all controllers from starting up at the same time after a power outage A 2 second delay 2 seconds X Unit between controllers startup is provided ALTECH CONTROLS XPRT1 VER 428 COPYRIGHT 1990 1997 0Sb VERSION COPYRIGHT INFORMATION SCREEN copyright and controller version information is provided on this screen after the startup delay O RESTART PRESS gt OIL FAILURE 0Sc OIL FAILURE RESET only appears after first oil failure before a retry set in Screen 17C or when the compressor has failed to restart after all retries once the compressor has failed to restart after all retries this screen becomes the default screen O RESTART PRESS gt OIL HOLDOFF 0Sd OIL HOLDOFF STATUS e only appears during the cycle time set in Screen 16C while the program tries to restart the compressor Suct Cndnsr Temp1 Temp2 Cmprsr NetOil 55 Psi 187 Psi 25 F 27 100 70 Psi 1Sa GENERAL STATUS present suction condensing and oil pressure e present refrigerated fixture and compressor temperatures the screen scrolls across the 16 character display Refrigerating 1Sb CURRENT OPERATION STATE this screen displays alternately with the General Status screen It shows the current operating status which includes Refrigerating Defrost Drain High Ha x Mins Oil Holdout Comp Overheat Suction Limit In addition to current state one of the following will also display if active HARD Override SOFT Override Mail SYSTEM
34. s and accessories are 40058 24VAC Class 2 X former 40 VA 115 208 240VAC 41107 Digital input cable 41062 Pressure Simulator 41072 Network Connection Cable 8 ft for CPUX to CPUX RS 422 network 41066 Modem to Network Interface RS 422 to RS 232C 41009 XPRT Communications Program Diskette 41046 XPRT Communications Manual 41080 TM 2 Demand Cooling Probe 41135 Demand Cooling Relay Liquid Line Solenoid CRX1 41089 Expansion XPRT1 Relay Connection Cable 45019 TM 2 High Temperature Sensor 41190 LPTX2 to LPTX4 Converter 0 to 125 psi 41191 LPTX2 to HPTX4 Converter 0 to 450 psi 41069 LPTX2 Low Pressure Transducer 0 100 psi 41070 HPTX2 High Pressure Transducer 0 350 psi 41195 Transducer Transition Fitting 1 8 NPT to 1 4 Flare 41189 Oil Pump Transition Fitting 1 8 NPT to 1 8 NPT 41197 Oil Pressure Interlock Requires a Current Relay 41185 Transducer Range Extender Extends range of LPTX4 to allow it to read 14 7 psi vacuum 41103 Digital Input Cable For switch inputs 41199 Contactor Filter 46009 Enclosure NEMA1 Hinged Door 12 W x 6 H x 4 D Rev F SECTION B SPECIFICATIONS CPU X1 Controller Specifications LPTX2 LPTX4 Low Pressure Transducers Ambient Temperature 35 to 125 Deg F LPTX2 Measurement Range 0 100 PSIG Ambient Humidity 0 to 90 RH LPTX4 Measurement Range 0 125 PSIG Controller Input Voltage 22 26 VAC Maximum Pressure 500 PSIG Controller Power 5 VA From XIO1 Board O
35. sed for setting the basic configuration time delays communication parameters and limits on settings of the XPRT1 Once they are set for a given installation generally there will be very little need for the on site serviceman to view these screens The Configuration Screens can be protected by a user selected password The XPRT1 is shipped from the factory with the password set to 0 0 0 This allows the installer full access to all the screens during the initial setup However after the control is configured a new password can be defined that will restrict access to only those users who correctly enter the password CPU X1 LED STATUS INDICATORS The XPRT1 has 4 LEDs on the CPU X1 board that indicate the status of the control relays on the XIO1 Input Output board see Figure C 1 They display information on the compressor the condenser fan defrost and the alarm status The LEDs will provide a positive logic indication of the controlled device LED ON DEVICE ON However if the compressor or condenser fans are configured for NO contacts then the CPU X1 LEDs will be reversed LED ON DEVICE OFF for that device The XIO1 s compressor fan and alarm LEDs will always be the reverse of the CPU X1 s LEDs See XPRT1 LED ON OFF Reversal Logic Modification Diagram on pg E 5 for procedures to reverse the LEDs Rev F XPRT1 STATUS SCREENS Startup Delay 8 Seconds STARTUP DELAY This feature designed for energy savings p
36. software allows the selection of using the N O contacts for the control of the compressor and condenser fan placing the Override Switch in the OVRD position will always de energize all the relays If an alarm circuit is connected to the alarm relay then a silencing method will be required as shown in the installation section The status LEDs located on the XIO1 Board will always reflect the status of the relay s coil If the NC contacts are used for control the Status LEDs will be the opposite of the controlled device SUCTION PRESSURE CONTROL LOGIC During normal operation the compressor is controlled using the Fixed Time Cycle Logic similar to that used on the Altech SSPC1 The forced run time plus the time it took to reach the Cutin setting will be equal to the cycle time programmed into the XPRT1 Generally the cycle time will be set for 6 minutes See the Application Section for more information on setting the Cutin setting The XPRT1 will turn off the compressor immediately if it detects a suction pressure below the minimum suction pressure set in compressor limit screen See Configuration Screen 120 TEMPERATURE CONTROL LOGIC The XPRT1 also has a temperature input P4 that can be set to control the compressor directly from a TM 1 temperature sensor reading If a fixture temperature is used to control the compressor the Cutin pressure setting should be set 5 psi lower than normal CONDENSING PRESSURE CONTROL The conde
37. trast Adjustment Status and Configuration Screens o CPU X1 LED Status Indicators O 1 XPRT1 Status Screens 072 XPRT1 Gonfiguratiori Screers iier cire tete tirer id C 4 XIO1 Input Output Board Operation sss C 6 Suction Pressure Control Logic A nts netter e EE Condensing Pressure Control eene eene Defrost Logic Oil Pressure Logic Demand Cooling Logic hi Pump Down Logic Liquid Line Solenoid esee C 6 APPLICATION Defr st Termination rrr e ern HT HERRERA PE D 1 Condensing Pressure Control eese tentent tnnt nennen D 1 INSTALLATION Parts Needed eo A E TAN E 1 Controller Mounting and Wiring EST Pressure Transducer Installation GEB Pressure Transducer E 2 TM 1 and TM 2 Temperature Sensor Installation and Wiring ao E 2 Averaging Four TM 1 Temp E 2 Control Relay Wiring e ttt RR e n irr E 3 Suggested Local Alarm Installation and Wiring E 3 Contactor Filter Installation System Configuration and Startup Procedure essen E 4 Pressure X DCR Converter Installation
38. ture 45 to 125 F Ambient Humidity 0 to 90 RH Weight 0 2 Ib Number of Relays 1 Each Contact Arrangement 1 Form C per Relay UL Contact Rating NC 10 Amp Inductive Load 240V Ve HP O 240 Voltage Rating 075001 2 00k Rev F SECTION C OPERATION PRESSURE SETTINGS PAD STATUS LEDS DISPLAY CONTRAST ca COMPRESSOR FAN DEFROST ALARM _ UP PAD ADJUSTMENT gt LEFT PAD DOWN PAD RIGHT PAD DEFROST SETTINGS PAD Figure C 1 DISPLAY AND KEYPADS The XPRT1 is equipped with a 2 line by 16 character wide LCD display Normally it will be displaying the values of the pressure transducers suction oil and condensing as well the temperatures of the two temperature inputs Since there is more information than can be presented in the 16 X 2 character display this information is presented by a scanning display that scrolls the information across the screen If it is desired to stop the scrolling to monitor a particular sensor reading it can be stopped in any position by pressing the RIGHT arrow keypad See Figure C 1 To resume the scrolling press the LEFT pad The amount of information that can be presented to the on site user is too large to be displayed on a single screen even if it is scanned Consequently the XPRT1 has a series of information screens that can be visualized as being stacked
39. used for the display pressure can be displayed in Psi kPa or Bar temperature can be displayed in degrees ForC LOG INTERVAL 5 Minutes 19C LOG INTERVAL sets the interval between logged data can be set from 1 to 15 minutes LO SUCT PRES DLY ALARMS lt 10 20 lt 20C ALARM DEFINITIONS sets the high and low alarm conditions for each sensor if the time delay is set at O then no alarm will be triggered the low alarms trigger below the setpoint and the high alarms trigger above the setpoint NOTE 1 An open switch is considered a low value and a closed switch a high value e g a HI OIL Switch set to opn will trigger when the switch is closed NOTE 2 Float alarms should be set with HI OIL Switch set to opn RELAY COMP FAN NC lt NC lt 21C RELAY CONFIGURATIONS selects the relay configuration for the compressor and condenser fan control relays on the XIO1 Board the NC contacts are recommended If the NO contacts are used the Over ride Switch on the l O Board will not force the compressor or the fan to operate continued on next page Rev F UNIT COMM SPD 22 lt 1200 lt Baud 22C COMMUNICATION CONFIGURATION sets the unit number for the XPRT1 for use in remote communications DO NOT SET TWO XPRT1s TO THE SAME NUMBER the maximum number of XPRT1s ona communications network is 48 KEYWORD RSETS 0 lt 0 lt 0 lt 16 16 28 23C PASSWORD SELECT sets the Password that allows entry int
40. well 4 If the problems point toward the XPRT1 then check the connections of the CPU X to XIO Connect Cable Then try temporarily connecting in good boards or cable one at a time until the defective part is isolated 5 If you have trouble diagnosing the problem contact Altech If a modem is connected it may be possible for Altech to contact the problem XPRT1 directly However before calling please have the following information available in order to speed the process e modem s telephone number e communication parameters Unit Baud rate e password The Version of the XPRT1 s control program This number can be obtained by cycling the power to the XPRT1 and observing the first screen Copyright and Patent notice 6 If a part is determined to be defective contact Altech to arrange for a replacement Note It is recommended that the CPU X1 Assembly be replaced as a whole Do not remove circuit board SERVICE REPLACEMENT PART NUMBERS Part Number Description R41057 CPU X1 Controller Assembly R41068 XIO1 Input Output Circuit Board R41071 CPU X1 to XIO1 Connect Cable 3 Ft R40193 Jaguar Connection Tool for card edge connectors R41111 Cable 24 AWG stranded shielded cable sold by ft R41069 LPTX2 Low Pressure Transducer 0 100 psi R41070 HPTX2 High Pressure Transducer 0 350 psi R41192 LPTX4 Low Pressure Transducer 0 125 psi Note Must have firmware Rev 4 21 or higher an
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