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Summary of Contents for MTA MCCY-CY013 301
- Page 1 ATER CHILLERS MCCY - CY 013÷301 O P E R A T I N G A N D M A I N T E N A N C E M A N U A L 38178800800 Original instructions in Italian language...
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Page 2: Quick Guide
OPERATING AND MAINTENANCE MANUAL Quick guide U I C K G UID E The machines are equipped with an electronic control panel, which can be programmed by means of some buttons. It controls the operation of refrigerant circuits basing on the measured control parameters. Here below are indicated some basic instructions to start the unit. -
Page 3: Symbols And Leds On The Display
OPERATING AND MAINTENANCE MANUAL Quick guide 0 . 4 . 2 Sy mb o l s a n d l e d s o n t h e d i s p l a y LED STATUS MEANING LED STATUS MEANING Steady Unit on in heat pump modality... -
Page 4: Table Of Contents
OPERATING AND MAINTENANCE MANUAL Contents O N T E N T S ............................1 UICK GUIDE Unit switching on and off................. 1 How to put the unit in stand by ................ 1 Display ......................1 Information about the status of the unit ............1 0.4.1 Display icons .....................1 0.4.2... - Page 5 OPERATING AND MAINTENANCE MANUAL Contents Inspection....................... 22 Positioning ..................... 22 Antifreeze protection ..................22 Hydraulic circuit (only CY units) ..............23 Expansion tank....................24 Electrical connections ..................25 Phase Monitor ....................26 Cooling circuit connections in MCCY motocondensing units ...... 26 5.8.1 Installation and routing of refrigerant lines for condensing units ....
- Page 6 OPERATING AND MAINTENANCE MANUAL Contents 7.19 Parameter setting .................... 46 7.19.1 Thermoregulation parameters ................46 7.19.2 Configuration parameters ................46 7.19.3 Dynamic Set-Point Parameters (NOT ENABLED FUNCTION) ....48 7.19.4 Energy Saving Parameters (NOT ENABLED FUNCTION) ......48 7.19.5 Compressor parameters ..................48 7.19.6 Fan parameters ....................48 7.19.7 Antifreeze resistance/supply parameters ............48 7.19.8 Defrosting parameters ..................48 7.19.9 Alarm parameters ...................49...
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Page 7: General Information
OPERATING AND MAINTENANCE MANUAL General Information HAPTER EN ERA L N F O R M A T I O N 1 . 1 D e s c r i p t i o n The machines described in this manual are called “WATER CHILLERS” or simply “CHILLERS”. This manual is written for those responsible for the installation, use and maintenance of the unit. -
Page 8: How To Interpret The Code Of The Model
OPERATING AND MAINTENANCE MANUAL General Information 1 . 2 H o w t o i n t e r p r e t t h e c o d e o f t h e m o d e l MCCY-CY013÷020 DESCRIPTION MODEL... -
Page 9: Safety
Arbitrary modifications made to the unit will automatically invalidate all forms of guarantee provided by the manufacturer. ATTENTION The hot / cold water produced by MTA units cannot be used directly for domestic hygiene or food applications. In the case of such applications, the installer is responsible for fitting an intermediate exchanger. -
Page 10: Lifting And Carriage Precautions
OPERATING AND MAINTENANCE MANUAL Safety 2 . 2 . 2 L i f t i n g a n d c a r r i a g e p r e c a u t i o n s Avoid injury by using a hoist to lift heavy loads. Check all chains, hooks, shackles and slings are in good condition and are of the correct capacity. -
Page 11: Installation Precautions
OPERATING AND MAINTENANCE MANUAL Safety MCCY-CY 211÷301 MODEL L min D min l min d min MCCY-CY 211÷301 1200 2000 To calculate the handling efforts, please refer to the weights indicated in the following table: Motocondensed CYGNUS (CY) Pointing weight of the units Pointing weight of the units CYGNUS model... -
Page 12: Maintenance And Repair Precautions
OPERATING AND MAINTENANCE MANUAL Safety 2 . 2 . 5 M a i n t e n a n c e a n d r e p a i r p r e c a u t i o n s Maintenance, overhaul and repair work must be carried out by competent personnel under a qualified supervisor. -
Page 13: Refrigerant Safety Schedule
OPERATING AND MAINTENANCE MANUAL Safety 2 . 3 . 1 R e f r i g e r a n t s a f e t y s c h e d u l e Denomination: R410A (50% Difluoromethane (R32); 50% Pentafluoroethane (R125); INDICATION OF THE DANGERS Major dangers: Asphyxia. - Page 14 OPERATING AND MAINTENANCE MANUAL Safety TOXICOLOGICAL INFORMATION Acute toxicity: (R32) LC50/inhalation/4 hours/lab. rats >760 ml/l (R125) LC50/inhalation/4 hours/lab. rats >3480 mg/l Local effects: Concentrations substantially above the TLV can cause narcotic effects. Inhalation of products in decomposition can lead to respiratory difficulty (pulmonary oedema). Long-term toxicity: Has not shown any cancerogenic, teratogenic or mutagenic effects in experiments on animals.
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Page 15: Technical Data
OPERATING AND MAINTENANCE MANUAL Technical data HAPTER E C H N I C A L D A T A 3 . 1 M a i n t e c h n i c a l d a t a The main technical data are given on the machine data plate: For all MCCY-CY models MODEL and CODE They identify the size of the unit and the type of construction. -
Page 16: Other Data Relative To The Standard Machines Mccy-Cy
OPERATING AND MAINTENANCE MANUAL Technical data 3 . 2 O t h e r d a t a r e l a t i v e t o t h e s t a n d a r d m a c h i n e s M C C Y - Model for CY units Tank capacity... -
Page 17: Performance
OPERATING AND MAINTENANCE MANUAL Technical data NOTE - The head is the head available to the user: it refers to the following conditions: air ambient temperature of 35° C, inlet water temperature of 12°C and outlet water temperature of 7° C. - It is possible for the pump installed to be different from the standard. -
Page 18: Description
OPERATING AND MAINTENANCE MANUAL Description HAPTER E S C R I P T I O N ATTENTION The following information refer only to the CY models, because the MCCY units are not equipped with evaporator, pump and hydraulic group. 4 . 1 G e n e r a l Cygnus range are monobloc units air condensed equipped with: hermetic compressors, hydraulic group made up of a plate- type evaporator, an accumulation tank, a circulator or a pump (it depends on the model) and a condenser made up a fin... -
Page 19: Condenser
OPERATING AND MAINTENANCE MANUAL Description ATTENTION The first time the machine is started after several days’ stoppage, turn on the casing resistance of every compressor at least 6 hours before pressing the ON/OFF button. 4 . 4 . 2 C o n d e n s e r MCCY-CY 013÷020 MCCY-CY 031÷071 MCCY-CY 081÷301... -
Page 20: Hydraulic Group (Only Cy Models)
OPERATING AND MAINTENANCE MANUAL Description Up to the MCCY-CY 171 model the units are equipped with a single-phase fan, while MCCY-CY 201÷301 units are equipped with three-phases fans. The protection rating is IPX4 and it has F insulation class to assure the external working with all types of climates. The assembly is completed with an external safety protection grill. -
Page 21: Overall Dimension
OPERATING AND MAINTENANCE MANUAL Description 4 . 5 O v e r a l l d i m e n s i o n See enclosures. 4 . 6 M i n i m u m d i s t a n c e s f r o m w a l l s i n t h e i n s t a l l a t i o n a m b i e n t See enclosures. -
Page 22: Electrical Circuit
OPERATING AND MAINTENANCE MANUAL Description For the installation see paragraph 5.8 “Cooling circuit connections in MCCY motocondensing units” . Once the remote evaporator has been installed, the MCCY units will work as described in paragraph 4.7.2 “Refrigerant circuit (only CY models)” . 4 . -
Page 23: Installation
OPERATING AND MAINTENANCE MANUAL Installation HAPTER N S T A L L A T I O N ATTENTION Before carrying out the installation or operating on this machine, ensure that all the personnel has read and understood the Chapter 2 “Safety“. 5 . -
Page 24: Hydraulic Circuit (Only Cy Units)
OPERATING AND MAINTENANCE MANUAL Installation 5 . 4 H y d r a u l i c c i r c u i t ( o n l y C Y u n i t s ) On the right side of the CY013÷071 units there are water On the back site of the CY081÷301 units there are threaded connections (see figure), the dimensions of their diameter water connections (see figure), the dimensions of the... -
Page 25: Expansion Tank
OPERATING AND MAINTENANCE MANUAL Installation The hydraulic unit must be dimensioned so that the pressure values of the water flow into the unit are not higher than those indicated in the table below: IN/OUT water Max. pressure [bar] Max. pressure [bar] Max. -
Page 26: Electrical Connections
OPERATING AND MAINTENANCE MANUAL Installation Table of specific weights P % Glycol 0% 1,0036 1,0195 1,0353 1,0511 1,0669 1,0024 1,0177 1,033 1,0483 1,0635 1,0008 1,0155 1,0303 1,045 1,0598 0,9988 1,013 1,0272 1,0414 1,0556 0,9964 1,0101 1,0237 1,0374 1,051 0,9936 1,0067 1,0199 1,033 1,0461... -
Page 27: Phase Monitor
OPERATING AND MAINTENANCE MANUAL Installation Flow the cable through the fairlead positioned in the low part of the left side panel by pulling it in the inside part of the compressor site. Remove the sheath from the cable and flow it through the appropriate grilles under the electrical panel. Wire the cable on the general switch-breaker as indicated in the figure below and in the electrical wiring annexed to the unit. -
Page 28: Installation And Routing Of Refrigerant Lines For Condensing Units
OPERATING AND MAINTENANCE MANUAL Installation REFRIGERANT REFRIGERANT INLET OUTLET On the back site of the MCCY 081÷301 units there are refrigerant connections (see figure above) that have to be welded, the dimensions of their diameter are indicated in the table below. 5 . - Page 29 OPERATING AND MAINTENANCE MANUAL Installation 2. When routing the refrigerant lines, consider all the appropriate measures to facilitate the return of oil to the compressor (e.g.: suitable gradient for horizontal pipes, elbow pipes at the start of vertical sections, oil siphons in vertical drops) as shown in the following diagram: 2% slope towards the compressor...
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Page 30: Controlling The Condensing Unit From A Digital Input (Factory Settings)
OPERATING AND MAINTENANCE MANUAL Installation 10. Replenish the refrigerant charge (*) until arriving at the following conditions: • Liquid subcooling (**) from 4 to 8 °C; • Gas superheating (***) from 3 to 6 °C; • The discharge temperature must be approximately 25 to 40°C higher than the condensation temperature (guideline values);... - Page 31 OPERATING AND MAINTENANCE MANUAL Installation • CF044 = 4; ATTENTION The evaporator water inlet/outlet (BEWIT/BEWOT) temperature probes are furnished with the machine, their installation must be carried out by the customer/installer. BEWIT utilized for the temperature regulation BEWOT utilized for the antifreeze function For the installation see the annexed diagrams.
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Page 32: Start Up
OPERATING AND MAINTENANCE MANUAL Start up HAPTER T A R T UP ATTENTION Before starting up these units be sure that all personnel have read and understood the Chapter 2 “Safety“. ATTENTION When the system is started up, if the high pressure alarm A01 is triggered without the compressor having been started, stop the unit immediately by setting it in OFF status from the controller. -
Page 33: Electronic Board
OPERATING AND MAINTENANCE MANUAL Electronic Board HAPTER L E C T R O N I C O ARD 7 . 1 U s e r i n t e r f a c e 7 . 1 . 1 D i s p l a y The display is divided in 3 zones. -
Page 34: Function Of Buttons
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 2 F u n c t i o n o f b u t t o n s BUTTON FUNCTION It selects IN/OUT water temperatures and ambient air temperatures in the upper part of the display. -
Page 35: Displaying During An Alarm
OPERATING AND MAINTENANCE MANUAL Electronic Board NOTE CF43 The displaying depends on the setting of parameter see 7.9 “Values displayed” . The lower section generally presents the following information: • unit status • condensing pressure BCP1, only in MCCY units with thermostat control digital input •... -
Page 36: Programming By Keyboard
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 8 P r o g r a m m i n g b y k e y b o a r d The parameters of electronic control are divided in two groups and in two levels: 1. -
Page 37: Values Displayed
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 9 V a l u e s d i s p l a y e d The values visualized on the display change according to the configuration of parameters CF36 for the top part and CF42 for the bottom part. -
Page 38: How To Put The Unit In Stand By
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 1 1 H o w t o p u t t h e u n i t i n s t a n d b y Stand-by modality is obtained every time the unit is switched off. It is indicated by the symbol lit. -
Page 39: Displaying The Operating Hours Of Loads "C1Hr - C2Hr - Pfhr
OPERATING AND MAINTENANCE MANUAL Electronic Board 7. If the password is correct the Label “ ” flashes for 5 seconds to confirm the resetting. ArSt After resetting the unit returns to normal displaying. 7 . 1 2 . 5 D i s p l a y i n g t h e o p e ra t i n g h o u r s o f l o a d s “ C 1 H r - C 2 H r - P F H r ” 1. -
Page 40: Operation Of Compressors (Except For Motorcondensing Units)
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 1 5 O p e r a t i o n o f c o m p r e s s o r s ( e x c e p t f o r m o t o r c o n d e n s i n g u n i t s ) The thermoregulation used is of the proportional type. - Page 41 (AR03+AR04) in chiller modality; and resetting procedure NOTE To lower the freeze protection setpoint, contact the MTA after-sales service and add a suitable amount of antifreeze solutions to the system (see chap. 5.3 “Antifreeze protection” ). Antifreeze alarm Digital input “open collector”...
- Page 42 OPERATING AND MAINTENANCE MANUAL Electronic Board COD. MEANING CAUSE ACTION RESET Low water Only units operating “open collector” outlet / alarm relay Automatic temperature alarm at if the temperature activated evaporator outlet measured by PB2 is The buzzer is activated lower than AL23 The alarm code is displayed High water...
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Page 43: Outlet Blocking
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 1 7 O u t l e t b l o c k i n g Alarm Antifreeze Alarm Description Comp. 1 Comp. 2 Pump Outlet Fan Cond. Fan code Resistances BEWIT probe Yes with Ar19 =0 BEWOT probe... -
Page 44: Parameters Description
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 1 8 P a r a m e t e r s d e s c r i p t i o n 7 . 1 8 . 1 T h e r m o r e g u l a t i o n p a r a m e t e r s Parameters Description ST01... - Page 45 OPERATING AND MAINTENANCE MANUAL Electronic Board Parameters Description CF28 It allows to select the operating modality (chiller / heat pump) by keyboard or by digital / analogue input: • 0= Selection by keyboard which has the priority on the digital / analogue input. •...
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Page 46: Dynamic Set Point Parameters (Not Enabled Function)
OPERATING AND MAINTENANCE MANUAL Electronic Board Parameters Description CF44 It allows to select the default displaying of the bottom by remote control: • 0= BEWIT temperature is displayed in the bottom • 1= BEWOT temperature is displayed in the bottom •... -
Page 47: Laser Operating Parameters (Not Enabled Function)
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 1 8 . 1 0 L A S E R o p e r a t in g p a r a m e t e r s ( N O T E N AB L E D F U N C T I O N ) Parameters Description Password: it allows to fix a numeric code for the password (from 0 to 999) - Page 48 OPERATING AND MAINTENANCE MANUAL Electronic Board Parameter Description Min. Max. Udm Resolution Factory setting CF12 ID1 polarity: only in 0= Enabled, closed contact 0 only in MCCY MCCY 1= Enabled, opened contact 211÷301 units units CF28 Chiller / heat pump selection: 0 by keyboard 0= keyboard 1 with remote digital...
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Page 49: Dynamic Set-Point Parameters (Not Enabled Function)
OPERATING AND MAINTENANCE MANUAL Electronic Board Parameter Description Min. Max. Udm Resolution Factory setting CF44 Default displaying of bottom part by remote control: 4 CY or MCCY 0= BEWIT units with control by 1= BEWOT temperature probe, 2= BCP1 5.8.3 “Controlling the 3= BAT1 condensing unit from BEWOT and BEWIT temperature... -
Page 50: Alarm Parameters
OPERATING AND MAINTENANCE MANUAL Electronic Board 7 . 1 9 . 9 A l a r m p a r a m e t e r s Parameter Description Min. Max. Udm Resolution Factory setting Password 7 . 1 9 . 1 0 L A S E R p a r a m e t e r s ( N O T E N A B L E D F U N C T I O N ) Parameter Description Min. -
Page 51: Other Components Setting
OPERATING AND MAINTENANCE MANUAL Other components setting HAPTER THER C O M P O N E N T S S E T T I N G 8 . 1 R e f r i g e r a n t h i g h a n d l o w p r e s s u r e s w i t c h e s The units are fitted with the following pressure switches: 1. -
Page 52: Water Differential Pressure Switch (Only Cy Units)
OPERATING AND MAINTENANCE MANUAL Other components setting 2. Units set with fans pressure switch The unit is furnished with a speed regulator of fan rotation, which operates to maintain the condensing pressure within a pre-fixed value. These units are furnished with a pressure transducer positioned on the refrigerant compressor outlet pipeline. It commutates the measured pressure value into an electric signal, sent to the speed regulator. -
Page 53: Operation And Maintenance
OPERATING AND MAINTENANCE MANUAL Operation and maintenance HAPTER P E R A T I O N A N D M A I N T E N A N C E 9 . 1 O p e r a t i o n The machine operates in completely automatic mode. -
Page 54: Water Circuit Emptying
OPERATING AND MAINTENANCE MANUAL Operation and maintenance Units MCCY-CY 031÷071 • to access the refrigerant circuit and the pump remove the panel a L (B). • to access the electric board components set the main switch on “O” and remove the panel (C). •... - Page 55 OPERATING AND MAINTENANCE MANUAL Operation and maintenance • in the CY 081÷301models with the hydraulic group there is a cock in the lower part of the connections side (see FIG.B), and a second one in the evaporator (see FIG. A) in the CY 031÷071models without hydraulic group there is only one cock in the evaporator (see FIG.
- Page 56 OPERATING AND MAINTENANCE MANUAL Operation and maintenance Plate evaporators: Once the water has been drained from the bottom valve (B), use a compressed air jet inside the exchanger to remove all water residue. Remove the lock nut from the bleed screw (A) and blow compressed air onto point (A). ATTENTION The water circuit emptying operation becomes indispensable when the unit is without antifreeze resistance and must remain OFF for a long time in an ambient with temperatures which could reach the freezing values of water inside the...
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Page 57: Maintenance Schedule
OPERATING AND MAINTENANCE MANUAL Operation and maintenance 9 . 3 M a i n t e n a n c e s c h e d u l e OPERATION Check for any alarm signals. Check that the water outlet temperature is within the envisaged range. Check that the water inlet temperature is in accordance with the value used for selecting the unit. -
Page 58: Rouble Shooting
OPERATING AND MAINTENANCE MANUAL Trouble shooting HAPTER R O UBL E S H O O T I N G PROBLEM CAUSE SYMPTOM REMEDY A1.1 Restore the thermal load within Water outlet temperature Thermal load too high. temperature the preset limits. BEWOT BEWOT higher than the higher than the expected... - Page 59 OPERATING AND MAINTENANCE MANUAL Trouble shooting PROBLEM CAUSE SYMPTOM REMEDY C1.1 Clean the upstream filter, if Water differential pressure The filter upstream from installed. Follow the alarm reset • Water does not flow. switch FLOW alarm trips. the unit is obstructed, if procedure to star up the unit Pressure difference between installed.
- Page 60 OPERATING AND MAINTENANCE MANUAL Trouble shooting PROBLEM CAUSE SYMPTOM REMEDY E1.1 Call a qualified refrigeration Low pressure switch or No refrigerant fluid in the technician to check for leaks • Refrigerant compressor alarm trips (LP) unit and replenish refrigerant stops; (see also A5).
- Page 61 OPERATING AND MAINTENANCE MANUAL Trouble shooting PROBLEM CAUSE SYMPTOM REMEDY I1.1 Identify and remove the cause Alarm displayed: Water outlet temperature of BEWOT temperature • See problem; too low. decreasing to a value lower than • The compressor stops and The value of the parameter Ar03.
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Page 62: Appendix
Appendix P P E N D I X ENERAL CONDITIONS CHECKLIST Start Has the unit suffered transport or Do not start the unit before repairs installation damage? Correct installation of the unit, working Have the minimum installation clearances in compliance with the instructions given specified in this manual been observed? in the manual Are the condensing coils free of obstructions? - Page 63 Appendix IRST START CHECKLIST ONLY CY UNITS Start Persons not involved in the operations must be kept clear of the area Stop the unit and find the cause of the Any alarms shown on unit display? problem Trip test: Water differential pressure switch working Check and/or renew the component Adjust the unit water gate correctly?
- Page 64 Appendix YDRAULIC CIRCUIT CHECK LIST ONLY CY UNITS Start Hydraulic circuit connections made in Adapt the connections compliance with best technical practice? Water inlet and outlet connections follow Correct connections correct direction? Fill hydraulic circuit and/or bleed the air Unit is full of water and all air pockets have if present been removed? Restore correct direction of rotation...
- Page 65 Appendix ONTROLLER CHECK Start Connect the unit to the correct power Power supply voltage complies with supply voltage specification given in wiring diagram? Replace conductors with conductors of Power feeding conductors are fit for purpose an appropriate type (wiring diagram)? Protective earth connection complies with Remake the connection in compliance statutory legislation?
- Page 66 Appendix IL CHECKLIST Start Check the oil sight glass, if present. Sufficient oil level in compressor? Top up as necessary If required, has crankcase heater been Activate crankcase preheating and wait 6 switched on at least 6 hours before start-up? hours The compressor is ready to start The data in this manual are not binding and may be changed by the manufacturer without notice.
- Page 67 Appendix NIT RUNNING CHECKLIST Start Remove all unauthorised persons from the test area Power on the unit. Check the display light up Check the unit is in stand-by, icon unlit Contactors and devices functioning correctly? Check the component and renew if necessary All On/Off operations must be performed exclusively Start the unit by means of button...
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