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Galletti МСС-Н 37 [3/24] Constructive features
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3
RG66002701 - Rev 01
The technical and dimensional data reported in this manual may be modified
MCC
2 CONSTRUCTIVE FEATURES
REFRIGERANT GAS: R410A
STRUCTURE
Galvanised sheet steel supporting base and enclosing panels made of
Peraluman to ensure effective protection against corrosive agents.
All bolts and screws and fastening devices are made of non-oxidisable
materials, or carbon steel that has undergone surface-passivating treatments.
The compressor compartment is completely sealed, acoustically isolated
and may be accessed on 2 sides (electric board side and plumbing
connection side) thanks to easy-to-remove panels that greatly simplify
maintenance and inspection.
The ventilation compartment is separated from the compressor compartment
of the unit, for inspection purposes when the unit is working.
For lifting the unit, ø 40-mm holes are provided in the base, through which
lifting pipes can be inserted and the vibration-damping feet can be accessed
for fastening.
MICROPROCESSOR CONTROL
The control panel enables the complete control of the MCC unit. It can be
easily accessed through a polycarbonate flap with IP65 protection rating.
Main functions
- Control over the temperature of water entering the evaporator
- Defrosting management (heat pumps) via pressure control
- Control of fan speed via pressure probe
- Complete alarm management
- Can be connected to an RS485 serial line (optional) for supervisory /
teleassistance operation
- Integrated MODBUS protocol
- Can be connected to ERGO networks (via RS485 optional)
- A remote terminal that reproduces the control functions is available as
optional (not compatible with ERGO)
- A configuration with external air probe that assures dynamic variation of
unit set point is available (optional).
Controlled devices:
- compressors
- fans
- cycle reversing valve (only for heating pump MCA-H)
- circulating pump
- antifreeze resistence (optional)
- alarm relay
The end user can change the parameter settings shown in the table within the
limits indicated.
Parameter min standard max
Cooling setpoint (°C) 8 11,5 20
Heating setpoint (°C) 15 40 45
Cooling hysterisis (°C) 0,3 2 5
Heating hysterisis (°C) 0,3 3 5
Antifreeze set point (°C) -40 3 5
All other parameters may be adjusted by an AUTHORISED SERVICE CENTRE
by means of a programming access key, except for the machine configuration,
which may be modified exclusively by GALLETTI S.p.A.
REFRIGERANT CIRCUIT
- scroll compressor fitted in a sound proofed compartment
- heat exchanger with stainless steel braze-welded plates optimised for
type of plate and distribution for R410A.
- finned block condenser coil with copper pipping and aluminium fins.
- dehydration filter.
- refrigerant sight glass with humidity indicator.
- thermostatic valve with external equalization and integrated MOP function.
- cycle - reversing valve (heat pump models only).
- check valves (heat pump only).
- liquid receiver (heat pump only).
- high and low pressure switches.
- safety valve.
- Schrader valves for checks and/or maintenance.
- refrigerant manometers (options).
TAYLORED HYDRONIC KIT
To simplify the connection of the MCC unit to user plant , 3 different hydraulic
kit are available.:
- base unit (MCC..B)
- kit including water pump and expansion vessel (MCC..P)
- kit including water pump and expansion vessel and buffer tank (MCC..S)
The main features are:
- High performance pump with extended working range: suitable to operate
with glycol mix up to 30%.The pump is fitted in the compressors vane,
acoustically insulated and of easy access thanks to the openable
panels.The pump is provided with internal thermal protection.
The water pump is cooled by the external air through a suitable grille.
- expansion vessel
- water safety valve
- automatic filling system
- automatic vent valve
- differential pressure switch and antifreeze thermostat with probe on leaving
water side.
- buffer tank dowstream to the evaporator, best solution to reduce the
chilled water variation due to the compressor ON/OFF operation.
Содержание
- Declaration of conformity 2
- The range 2
- Constructive features 3
- Components lay out 4
- Constructive features 4
- Components lay out 5
- Mcc 09 15 5
- Mcc 18 22 5
- Mcc 25 37 5
- 0 1 2 3 to be requested at the moment of the order power factor correction capacitors soft starter 6
- Compressor options not present power factor correction capacitors soft starter 6
- Heat pump mcc hb basic unit only evaporator mcc hp unit with pump and expansion vessel mcc hs unit with buffer tank pump and expansion vessel 6
- Models and configurations 6
- The choice of some options can prevent the choice of some options or oblige the selection of other fields to contact the galletti for verification 6
- The range is madde of 10 models cooling only cwith cooling capacities from 6 to 37 kw and 10 models heat pump operation with heating capacity from 6 to 41 kw to simplify the way of making the order galletti offers 3 different solutions of hydraulic kit built in the unit for only cooling only and heating pumps units 6
- Water chiller mcc cb basic unit only evaporator mcc cp unit with pump and expansion vessel mcc cs unit with buffer tank pump and expansion vessel 6
- Cooling only units rated technical data 7
- Heat pump units rated technical data 7
- Rated technical data 7
- Inlet air dry bulbe temperature tw in out inlet outlet air temperature pf cooling capacity pa total electric absorbed power models with hydraulic kit mcc cp mcc cs 8
- Mcc c cooling operation 8
- Performances 8
- Inlet air dry bulbe temperature tw in out inlet outlet air temperature pf cooling capacity pa total electric absorbed power models with hydraulic kit mcc cp mcc cs 9
- Mcc c cooling operation 9
- Performances 9
- Inlet air dry bulbe temperature tw in out inlet outlet air temperature pf cooling capacity pa total electric absorbed power models with hydraulic kit mcc hp mcc hs 10
- Mcc h cooling operation 10
- Performances 10
- Inlet air dry bulbe temperature tw in out inlet outlet air temperature pf cooling capacity pa total electric absorbed power models with hydraulic kit mcc hp mcc hs 11
- Mcc h cooling operation 11
- Performances 11
- In the heat pump operation heating mode the actual heating capacities of units may be lower than the values shown in the table due to defrosting cycles 12
- Inlet air dry bulbe temperature tw in out inlet outlet air temperature pt heating capacity pa total electric absorbed power models with hydraulic kit mcc hp mcc hs rh relative umidity 12
- Mcc h heating operation 12
- Performances 12
- In the heat pump operation heating mode the actual heating capacities of units may be lower than the values shown in the table due to defrosting cycles 13
- Inlet air dry bulbe temperature tw in out inlet outlet air temperature pt heating capacity pa total electric absorbed power models with hydraulic kit mcc hp mcc hs rh relative umidity 13
- Mcc h heating operation 13
- Performances 13
- Calculation factors 14
- Cooling mode 14
- Glycol and water solution 14
- Heat recovery options 14
- Heating mode 14
- Operating limits 14
- Water temperature drop rise different than 5 c 14
- Pressure drop on water side 15
- The following diagrams show evaporator pressure drops δ pw according to water flow rate qw with average water temperature of 10 c 15
- The following diagrams show availiable unit pressure head pu according to water flow rate qw with average water temperature of 10 c 16
- Unit available pressure head 16
- Water circuit 17
- Diagram showing electrical connections between mca and pcds pcd remote control panel 18
- Electrical data 18
- Base dampers 19
- Overall dimensions mcc 06 07 19
- Base dampers 20
- Overall dimensions mcc 09 15 20
- Base dampers 21
- Overall dimensions mcc 18 22 21
- Base dampers 22
- Overall dimensions mcc 25 37 22
- Installation clearance requirements 23
- To guarantee the proper functioning of the unit and access for maintenance purposes it is necessary to comply with the minimum installation clearance requirements shown in figures 1 and 2 verify that there are no obstacoles in front of the fans air outlet avoid any and all situations of backflow of hot air between air outlet and inlet of the unit if even only one of the above conditions is not fulfilled please contact the manufacturer to check for feasibility 23
- Siting 24
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