MYDAX 1M9W-S, Instruction, Operations & Maintenance Manual

Page 1: ...emperature control technology MYDAX INC INSTRUCTION OPERATIONS MANUAL 1M9W S WATER COOLED CHILLER Serial Number 120 07XX MYDAX INC 12260 Shale Ridge Road Auburn CA 95602 530 888 6662 FAX 530 888 0962...

Page 2: ...ONS 1 II SYSTEM OVERVIEW 2 III INSTALLATION 4 IV FRONT PANEL CONTROLS 5 V ERROR MESSAGES 7 VI DIAGNOSTIC DISPLAYS 8 VII SERVICE WARRANTY 11 VIII RESHIPPING LONG TERM STORAGE PREPARATION 12 IX APPENDIX...

Page 3: ...he microprocessor based control system includes an extensive monitoring capability including comprehensive controls error messages and diagnostics System status is indicated via a two row 40 character...

Page 4: ...tles at the proper level The valve drive setting is based primarily upon data received from RTD s resistance temperature devices located about the circuit The drawing shows RTD s at the evaporator val...

Page 5: ...rive signal is routed through board M1004 as is the phase detector circuit The system interlock loop is controlled by the M1002 circuit board In this application the interlock loop consists of the fre...

Page 6: ...ystem is operating Check all fluid interface connections now to ensure against leaks CIRCUIT BREAKER Set the circuit breaker mounted on the front of the system Upon setting the circuit breaker a messa...

Page 7: ...switch is depressed again Pressing MUTE ALARM when no alarm is active causes the alarm to sound once and the TEST ALARM display to appear SET Enables SET TEMPERATURE MODE SET MODE is disabled from pa...

Page 8: ...AL Display shows model number and software revision date and copyright RUN PUMP Inactive in this system X Y For future use Z See Test Panel 9 in the Diagnostic Displays Section EMO SWITCH This is a la...

Page 9: ...ow tank liquid level Tank Too Hot Indicates that the reservoir temperature is more than 10 C above the highest allowable set point Microprocessor shuts down the system Push Reset Indicates that the re...

Page 10: ...ondenser temperature exceeds 54 C TEST PANEL 3 The first 3 sets of 4 digit numbers are hexadecimal They represent correction values for the slow gain servos for up to 3 reservoirs The function of this...

Page 11: ...ay shows voltmeter readings for up to 3 optional water resistivity monitor interface raw data outputs Each resistance monitor channel has a positive and a negative voltage reading These readings are a...

Page 12: ...recirculating channel was last selected at the Main Display and the system wide alarm history The second line indicates which recirculating channel was last selected at the Main Display the evaporator...

Page 13: ...air or dry nitrogen before use of a torch In particular service of Mydax refrigeration circuits requires attention to the following 1 Use caution to protect components from heat damage 2 Prevent any m...

Page 14: ...o shipment or storage preparation 1 Feed in a charge of water glycol mix into the condenser through the Condenser In connection This can be done by pump or gravity flow 2 Feed water glycol until mixtu...

Page 15: ...software package or any control software of the user s choice Full control and monitoring is possible allowing complete system operation from any convenient location Cable connection is via a rear pan...

Page 16: ...k temperature and the set point temperature TE2 Causes transmission of flow and resistance if the options exist For example TE3 Transmits the contents of the 2 by 40 character main display over the RS...

Page 17: ...rned for acknowledgment If a command is not understood or ignored then a is returned RS 232C STATUS MESSAGES TE1 status messages include the following ON 19 95 20 0 CR LF A B C Key A System is ON or O...

Page 18: ...C DISPLAYS Test Panel 1 for explanation of drive signals L M N Bypass Superheat and Desuperheat valve drives Desuperheat is not available in all designs O P Heater drive signals Heater 2 is inactive i...

Page 19: ...oken and the reset switch must be depressed to re establish it 5 FILL TANK 1 The tank 1 low level sensor has tripped If coolant is not added soon the empty sensor trips and the system shuts down 6 Ina...

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Page 21: ...Gauge Coolant Supply 15 C to 25 C 10 Gpm 100 Psi Coolant Return Heat Exchanger Evaporator Valve Sight Glass Refrigerant Liquid Tank RTD Installed Through Side Tank Heaters Level Switches Tank Baffle...

Page 22: ...2 Connector J2 M1001 Controller Power 24 VAC Out Gnd In Gnd 2 4 V A C 4 0 V A CON1 20 Amp D2402 4 7 RL1 A L3 L2 L1 Compressor Crankcase Heater Grn Pump 53 Tank Empty Fill Tank 22 Tank1 Lo 5V 49 HTR1 2...

Page 23: ...A12 A13 A14 MREQN A15 U14 8251N KEYN Nov 10 1997 0 1uf 5V ResetN In4 ResetN 5V U21 Max 690 8 7 6 5 4 3 2 1 2 3 4 1 1k WaitN J7 R1 10k 0 1uf 8 0MHz D0 D1 D3 D2 D6 D7 D5 D4 26 27 20 19 22 21 14 15 12 8...

Page 24: ...6 15 4 17 2 1 19 9 12 7 14 5 16 3 18 D2 D3 D4 D5 D6 U10 82C51A A0 PCLR RDN WRN BAUD CLOCK 8251N 4 0MHz 5V 26 4 12 21 13 10 8 7 6 5 2 1 28 27 9 25 11 20 Rd CTS Td RTS U4 MAX232 15 14 3 17 19 23 12 9 11...

Page 25: ...2 21 20 19 18 2 17 4 15 6 13 8 11 1 19 9 12 7 14 5 16 3 18 74HC244 U1 10k 5V IN 7 D7 D6 D5 D4 D3 D2 D1 D0 2 17 4 15 6 13 8 11 1 19 9 12 7 14 5 16 3 18 74HC244 U2 10k 5V IN 6 D7 D6 D5 D4 D3 D2 D1 D0 Re...

Page 26: ...2 1 11 3 4 7 8 13 14 17 18 U28 74HC273 19 16 15 12 9 6 5 2 1 11 3 4 7 8 13 14 17 18 Out 4 5V 5V DVB DVA High R J4 4 POS R J4 3 DIB J4 6 DIA J4 5 LED 5V 15V Run DVM DVC 1K 1K 1K 1K DVM RDY 5V 5V Out 0...

Page 27: ...kHz 1uf 200K 0047uf 47 5V 1uf DVM RDY U27 1 2 U36 ICL7109 74HC14 15V 3 2 8 1 7 6 5 U38 TL032CP 10 24V 10 24V 10 0k 0 1 10 0K 0 1 20 0K 10 0K D0 14 13 D1 D2 12 11 D3 D4 10 9 D5 D6 8 7 D7 U40 U39 AD7528...

Page 28: ...KHz U30 U30 optional Tank1 J4 9 TL032CP 10 0K 0 1 20 0K 0 1 20 0K 0 1 0 1uf 0 1uf 15V 15V 8 4 5 6 7 3 2 1 16 1 2 3 4 5 6 7 11 10 12 8 9 13 14 15 A1 5V 10 24V 5 12V Pin Jumpers E D C B A Out20 AD7542KN...

Page 29: ...23 22 S4 S3 21 20 S2 S1 19 U5 DG506A U6 DG506A 18 1 27 15V 5V 15V 28 28 15V 5V 15V 27 1 18 100K 100K 100K 100K 100K 100K 100K 100K RA J1 3 RB J1 4 RC J1 1 RD J1 2 U3 U2 10K 0 001 uf 1 00K 0 1 9 09K 0...

Page 30: ...EV2 1 1K 47 1 2 4 6 220 Q2004L3 Q2004L3 220 6 4 2 1 47 1K 1 EV3 Q3 MOC 3032 U8 EV3 J2 18 EV4 J2 17 U9 MOC 3032 Q4 EV4 1 1K 47 1 2 4 6 220 Q2004L3 Q2004L3 220 6 4 2 1 47 1K 1 EV5 Q5 MOC 3032 U10 EV5 J2...

Page 31: ...1uf 1 00M 470K 470K 74HC14 5V 8 Interlock Loop Relay Q1 BS170 1N4002 1K 5V OK Green LED 12 1 13 U16 Miss Ph J2 4 Rev Ph J2 3 1 0uf 10M 8 9 6 5 4 3 U17 U16 74HC27 11 10 9 8 U16 1K Red LED REV 5V Red LE...

Page 32: ...G D2729 Mydax Inc Auburn CA M1007 LED Power Supply Sept 24 1997 0 1 5 1 1 watt 1000uf 50V 24 VAC Common Polyswitch LM317T 1 0 Positive Negative 250 mA 4 1 volt to Display LED backlight Heat Sinked In...

Page 33: ...6 5 1 2 3 Flow In Common Shield 15V To J4 14 T1 Ext To J4 12 T2 Ext 8 9 10 Flow Gnd Press U2 10 Ref Pres Pres Common 1 02K 2 1 8 3 4 5 6 7 15 V 15 V 7 4 5 6 INA114 Optional 0 1 0 1 15 V 1M 10K Pressur...