Carrier 040-420- Manuals

50 Fig. 43 — 30GTN,GTR,GUN,GUR130-210, 230A-315A, 330A/B-420A/B; 575 V Motormaster® Control Units

T a b l e 4 A Capacity Control Steps, 040-070 LOADING SEQUENCE A LOADING S % Displacement 8 3 B 30GN . . 060 (50 Hz) Displacement 1 6 1 0 0 6 5 1 0 0 Compressors 1 0 0 A l Al l ,A2,Bl A l B l * * A l A l A l l , A l A l A l A l A l 1 5 5 7 l A l A l A l A l A l A l 0 7 0 ( 5 0 H z ) Al *Unloaded com...

Table Capacity Control Steps, 080-110 and Associated Modular Units UNIT 30GN 110 (60 Hz) Al 110 (50 Hz) LOADING SEQUENCE A Displacement 1 4 Compressors A l A l A l l , A 2 , B l * A l A l A l A l A l A l A l A l A l A l A l A l A l ” A l t t A l A l Al A l A l A l * A l % * A l A l Al l ,A2,Bl A l A...

T a b l e 4 C Capacity Control Steps, 130-210 and Associated Modular Units UNIT 3 0 G N 1 3 0 , 130, CONTROL STEPS LOADING SEQUENCE A Displacement 6 Compressors A l Al l ,Bl A l A l A l A l A l A l A l A l A l A l A l A l A l A l A l A l A l ’ A l A l Al *,Bl A l Al l ,A2,Bl A l Al l ,B2 A l A l A l...

T a b l e 4 C Capacity Control Steps, 130-210 and Associated Modular Units EQUENCE A LOADING % Displacement 6 4 95 3 9 5 1 0 0 LOADING % Displacement EQUENCE Compressors UNIT 3 0 G N Compressors A l A l A l A l A l A l A l A l tt * A l Al’, Bl A l A l A l A l * A l A l Al A l A l A l A l A l A l A l...

T a b l e 4 D Capacity Control Steps, 225, 250,280 UNIT 30GT 225 (60 Hz) 225 (50 Hz) L O A C % Displacement 1 2 4 6 SEQUENCE A Compressors A l A l A l A l A l A l A l A l A l A l Al l ,A2,A3,Bl A l A l A l A l A l A l A l * A l A l A l A l A l Al A l A l A l A l A l Al l ,A2,A3,Bl l ,B2,B3 A l A l A...

Head Pressure Control The microprocessor con- trols the condenser fans in order to maintain the lowest con-densing temperature possible, thus the highest unit efficiency.Instead of using the conventional head pressure control meth-ods, the fans are controlled by the position of the EXV and s u c t i...

Keypad and Display Module (Also Called or LID) The only function of this module is to allow the operator to communicate with the processor. It is usedto enter configurations and set points and to read data, per-form tests, and set schedules. This device consists of a key-pad with 6 function keys, 5 ...

Table Functions and Subfunctions FUNCTIONS Status Test Schedule S e r v i c e History Set Point c l T E S T C H D c l c l S E T A u t o m a t i c outputs O v e r r i d e L o g O n a n d R u n T i m e S e t P o i n t s Display L o g O f f ( C h i l l e r F l u i d ) 2 A l a r m Compressors Clock Set ...

Table 9 Keypad Directory STATUS SUBFUNCTION KEYPADENTRY 6 TEMPERATURE cl q cl cl 7 PRESSURE 8 ANALOG 9 DISPLAY SCTB X S S T B X C T B X SHB X R S T X * PRESSURE D P A X S P A X x x x x OPA X DPB X S P B X x x x x O P B X ANALOG REF X L M T X * R S T X * I N P U T x* D L 2 X * COMMENT Circuit B Satur...

Table 9 Keypad Directory TEST SUBFUNCTION KEYPAD ENTRY 2 COMPRESSORS AND UNLOADERS During compressor test, compressors start and run for 10 seconds. Compressor service valves and liquid line valves must be open. Energize crankcase heaters 24 hoursprior to performing compressor tests. DISPLAY C O M P...

Table 9 Keypad Directory SERVICE The next 3 subfunctions provide the ability to modify configurations Refer to separate Installation, Start-Up, and Service Instructionss u p p l i e d w i t h u n i t f o r f u r t h e r i n f o r m a t i o n o n c h a n g i n g c o n f i g u r a t i o n s . To chang...

Table 9 Keypad Directory SUBFUNCTION 1 RUN TIME KEYPAD ENTRY DISPLAY COMMENT RUN TIME R u n T i m e l n f o r m a t i o n HR X Total Hrs Unit Has a Comp Operating HRA X C i r c u i t A R u n T i m e c l HRB X C i r c u i t B R u n T i m e 2 STARTS S T A R T S S t a r t s I n f o r m a t i o n c l x ...

T a b l e 1 0 Operationat and Mode Display Codes The operating modes are displayed by name or code num- ber, to indicate the operating status of the unit at a giventime. The modes are: STATUS FUNCTION This function shows the rotatingdisplay, current status of alarm (diagnostic) codes, capacitystages...

Example 2 Reading Current Operating Modes KEYPAD I DISPLAY ENTRY RESPONSE I COMMENTS TUE Keypad has not been used for at LOCAL ON least 10 minutes Rotating summary C O O L 1 display appears on screen 0 A L A R M S 2 MODES There are 2 modes currently in effect c l LOCAL ON Unit is on by chiller on/of...

Example 3 Using Test Function KEYPAD DISPLAY I ENTRY RESPONSE COMMENTS C O M P CPA OFF CPA ON CPA 1 OFF CPA 2 OFF Factory/field test of compressorssubfunction of test function Circuit A, Compressor test Pressing starts the test: when the compressor should be runningthe display shows CPA1 on If the t...

Maximum Reset Amount (CRST2) allowable range 0” to 20” F (0” to 11” C). This is maximum amount leav-ing chilled water set point is to be increased. 2. Maximum Reset Reference (CREF2) allowable range 0” to 20” F (0” to 11” C). This is the cooler temperature drop at which reset reaches its maximum val...

Temperature Reset Based on External Temperature If de- sired, temperature reset can be based on an external tem-perature, such as space or outdoor-air temperature. This re- quires a thermistor Part No. located in the space or outdoor air and wired to terminals as follows(also see Field Wiring sectio...

P O I N T N U M B E R O F F I R S T CHANNEL LIMIT C O D E 3 1 2 4 P W R I (ALARM ( M O D E RET c D O + D LEGEND C O M M Communications Bus PWR P o w e r SW Switch N O T E : F o r s p e c i f i c c o n n e c t i o n p o i n t s ,see Fig. 24 29. Fig 6 4 IN/4 OUT Options Module Wiring for Reset, Demand...

16 8 6 0 0 2 4 6 8 1 8 2 0 R E S E T R E F E R E N C E S I G N A L - 2 0 M A I N P U T ) Fig. 7 4-20 Cooling Temperature Reset E x a m p l e 7 A Using Demand Limit Example Using Demand Limit (4-20 (First Log On as Shown in Table 11) (First Log On As Shown in Table 11) KEYPAD ENTRY DISPLAY RESPONSE F...

M A X D E M A N D = 90 DEMAND SIGNAL (4-20 MA INPUT) Fig. 8 4-20 Demand Limiting Reading and Changing Time Displav Time is entered Off The service function is and displayed in 24-hour time. The day of the week is word protected. Therefore, to gain entry to this function, tered as a number. 1 = Mon, ...

The schedule function can be programmed for inactive, single set point, or dual set point operation. When schedule is configured for inactive, chilled water pump relay remains energized continuously but is not usedsince chiller is usually controlled by remote chilled waterpump interlock contacts. Wh...

Example 10 H o l i d a y S c h e d u l e F u n c t i o n Example 9 Using the Schedule Function E N T E R D I S P L A Y COMMENT D I S P L A Y H O L I D A Y J A N 0 1 0 2 ( I n c l u d e s J a n and 2nd) 01 (Includes April 17th) M A Y 2 1 0 1 ( I n c l u d e s M a y 2 1 s t ) JUL03 01 (Includes July 3...

Alarm Codes Following is a detailed description of each alarm code error and possible cause. Manual reset of an alarm is accomplished by moving STOP-CCN Switch to STOP position, then back to LO-CAL or CCN position. See Table 14 for listing of each alarmcode. Code 0 No alarms exist Codes 1 8 Compress...

Possible causes of failure: 3 . 4. 5 . 6. High-Pressure Switch Open High-pressure switch foreach compressor is wired in series with 24-v power thatenergizes compressor control relay. If high-pressure switchopens during operation, compressor stops. This isdetected by microprocessor through the feedba...

Possible causes of fault are low refrigerant charge, plugged filter drier, or a faulty EXV or thermistor.Code 48 Low suction superheat, Circuit A Code 49 Low suction superheat, Circuit B If EXV is at minimum position, suction superheat is less than F (5.5” C) or saturated evaporator temperature is g...

Electronic Expansion Valve EXV OPERATION These valves control the flow of liq-uid refrigerant into the cooler. They are operated by pro-cessor to maintain a specified superheat at lead compressorentering gas thermistor (located between compressor motor and cylinders). There is one EXV per circuit. S...

MUFFLERS C O M P R E S S O R S CIRCUIT C I R C U I T A J FILTER I D R I E R LEGEND D P T Discharge Pressure Transducer Oil Pressure Transducer Suction Pressure Transducer T Thermistor Number Fig. 13 Thermistor and Pressure Transducer Locations 58

A I RVENT LEAVING W A T E R / B R I N ETHERMISTOR C O O L E R E N T E R I N G F L U I D W A T E R / B R I N E B A F F L E C O N N E C T I O N S U C T I O N C O N N E C T I O N C O N N E C T I O N D R A I N L E A V I N G W A T E R / B R I N E C O N N E C T I O N C O O L E RTUBE( T Y P I C A L ) E N T...

Thermistors All thermistors are identical in their tem- perature vs. resistance performance. Resistance at varioustemperatures are listed in Tables 15 and 16. LOCATION General location of thermistor sensors areshown in Fig. 13. Cooler Leaving Water Thermistor is located in leaving water nozzle. The ...

T H E R M I S T O R * R E F R I G E R A N T D I S C H A R G E E N T E R I N G T E M P E R A T U R E P R E S S U R E C Y L I N D E R S T R A N S D U C E R * E Q U A L I Z E R L I N E O I L P R E S S U R E T R A N S D U C E R * S U C T I O N P R E S S U R ET R A N S D U C E R * S I G H T G L A S S( E ...

Control Modules Turn controller power off before servicing controls. Thisensures safety and prevents damage to controller. PROCESSOR MODULE 4 IN/4 OUT MODULE (SIO), LOW-VOLTAGE (DSIO), AND EXV DRIVER MODULE (DSIO) The PSIO, DSIO and SIO modules all perform continuous diagnostic evaluations of the co...

DRIVER) ( L I D ) ( 4 Fig. Sensor Bus Wiring (Communications) PROCESSOR MODULE (PSIO) (Fig. 20) Inputs Each input channel has 3 terminals; only 2 of the terminals are used. Application of machine determines which terminals are used. Always refer to individual unit wiringfor terminal numbers. Outputs...

4 OUT MODULE (SIO) (Fig. 22) 4 In/4 Out mod- ule allows the following features to be utilized: Temperature Reset by outdoor air or space temperature. A remote thermistor (Part No, is also re- q u i r e d .NOTE: This accessory is not required for return water temperature reset. 2. Temperature Reset b...

ACCESSORY UNLOADER INSTALLATION Some of the 30G II units come standard with unloader(s), and many permit additional unloader(s) to beadded if desired. See Table 18. IMPORTANT: Accessory hot gas bypass cannot bei n s t a l l e d w i t h a c c e s s o r y u n l o a d e r s o n u n i t s w i t h m o r ...

S C H E M A T I C i FROM OR CONTROL SCHEMATIC T R A N 080-110 Hz) and 130 (60 L E G E N D Contactor Compressor Protection Control System Control Relay Terminal Block Module Transformer L o w o l t a g e U Unloader Fig. 23 Accessory Unloader Control Wiring 69

130 (50 Hz), 150-210, 225, 250, AND 280 UNITS (and a s s o c i a t e d m o d u l a r u n i t s ) Install control wiring. The minimum wire size for stallation is 16 (American Wire Gage). Refer to Fig. 24 and 25 for proper wiring. Open the control boxdoor. Locate unloader relays A and B (URA, URB) inp...

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4 OUT S W I T C H M O D U L E _ _ _ AND ASSOCIATED MODULAR UNITS - - - - 2 FLOTRONIC’” II UNITS T B Terminal Block NOTE: The Flotronic II units require the acces- sory options module for this feature Fig. 33 Remote Dual Set Point Control - - - - - - c l 3 4 T5-3 AND MODULAR UNITS 3 4 FLOTRONIC II UN...