Galletti MPI DC 08 User manual

MPI DC
08 kW - 29 kW
R410A
eco
TECHNICAL MANUAL FOR CHILLERS AND HEAT PUMPS
GB
CHILLERS AND HEAT PUMPS DC-INVERTER

MPI DC
2
All copying, even partial, of this manual is strictly forbidden. RG66007970 - Rev 01
TABLE OF CONTENTS
1 The series.....................................................................................................................................................................................................................................4
2 Constructive features....................................................................................................................................................................................................................5
3 Layout of components...................................................................................................................................................................................................................6
4 Models and Configurations ...........................................................................................................................................................................................................9
5 Technical characteristics............................................................................................................................................................................................................10
5.1 Rated technical data - cooling only...............................................................................................................................................................................................10
5.2 Rated technical data - heat pump .................................................................................................................................................................................................11
6 Performances .............................................................................................................................................................................................................................12
6.1 Cooling capacities MPI DC C .......................................................................................................................................................................................................12
6.1 Cooling capacities MPI DC H .......................................................................................................................................................................................................15
6.1 Heating capacities MPI DC H .......................................................................................................................................................................................................18
6.4 Integrated capacities ....................................................................................................................................................................................................................20
7 Sound Levels ..............................................................................................................................................................................................................................20
8 Operating limits ..........................................................................................................................................................................................................................20
8.1 Cooling mode ..............................................................................................................................................................................................................................20
8.2 Heating mode ..............................................................................................................................................................................................................................21
8.3 Thermal carrier fluid.....................................................................................................................................................................................................................21
9 Calculation Factors.....................................................................................................................................................................................................................21
9.1 Changeinoperatingparameterswith∆totherthan5°C ................................................................................................................................................................21
9.2 Water and glycol mixture..............................................................................................................................................................................................................21
10 Pressure drops ...........................................................................................................................................................................................................................22
10.1 Pressure drops, water side...........................................................................................................................................................................................................22
10.2 Pressure drops of Y filter .............................................................................................................................................................................................................23
11 Available head ............................................................................................................................................................................................................................24
12 Water circuit...............................................................................................................................................................................................................................25
12.1 Water content within the system and charging of expansion tank ..................................................................................................................................................25
13 Electrical data and connections..................................................................................................................................................................................................27
14 Overall dimensions.....................................................................................................................................................................................................................29
15 Installation clearance requirements ...........................................................................................................................................................................................32
16 Siting ..........................................................................................................................................................................................................................................34
16.1 Positioning of vibration dampers...................................................................................................................................................................................................34
DECLARATION OF CONFORMITY
Galletti S.p.A., whose head office is located at 12/a Via Romagnoli 12/a Bentivoglio (Bologna) - Italy, hereby declares, under its own responsibility, that the water chillers
and heat pumps belonging to the series: (see table below) units intended for applications in civil air conditioning systems, comply with the requirements of Directives:
2006/42/CE, 2004/108/CE, 2006/95/CE, 97/23/CE (PED).
These units , working with fluids belonging to group 2, according to Directive 97/23/CE, are the result of an assembly of components [compressors, brazed plate heat
exchangers, liquid receivers, pipes, control and safety valves] which are individually provided, where required, with certification in accordance with current directives:
the category to which the machines belong is determined on the basis of an analysis of the components subject to the PED and corresponds to the highest category
among the components used.
For each series of machines, the conformity of the assembly has been assessed by notified bodies, applying the assessment procedures (forms) pursuant to annex II of
the PED - Directive 97/23/CE, as shown in the following table:
Bentivoglio, 20/06/2013
Galletti S.p.A.
Luca Galletti
Range Size Notified body certificate Conformity Compliance Module PED
category Marking
MCC - MCC H 6 - 7 - 9 - 12 - 15 0425
2422/0
Modulo D1 ICE
MCC - MCC H 18 - 22 - 25 - 33 - 37 0425 Modulo D1 II CE + PED
MCW - MCW / H 5 - 7 - 10 - 12 - 15 0425 Modulo D1 ICE
MCW - MCW / H 18 - 20 - 22 - 27 - 31 - 39 0425 Modulo D1 II CE + PED
MPE - MPEH MCE - MCEH 4 - 5 - 7 - 8 0425 Modulo D1 ICE
MPE - MPEH MCE - MCEH 9 - 10 - 11 - 13 - 15 - 18 0425 Modulo D1 ICE
MPE - MPEH MCE - MCEH 19-20-21-23-24-26-27-28-31-32-34-35-39-40 0425 Modulo D1 II CE + PED
MPE - MPEH MCE - MCEH T30 - T34 - T40 - T45 0425 Modulo D1 II CE + PED
MPE - MPEH 54 - 66 0425 Modulo D1 II CE + PED
MPI 15 0425 Modulo D1 ICE
MPI 27 0425 Modulo D1 II CE + PED
MPI DC 8 - 10 - 14 - 15 - 18 0425 Modulo D1 ICE
MPI DC 23 - 27 - 29 0425 Modulo D1 II CE + PED
MFE 5 - 6 - 8 - 12 -13 - 16 - 17 - 20 - 23 0425 Modulo D1 ICE
MXE - MXE E 9 - 11 - 14 - 16 0425 Modulo D1 ICE
MXE - MXE E 19 - 21 0425 Modulo D1 II CE + PED
MCP 7 - 9 0425 Modulo D1 ICE
MCP
10-13-15-18-27-32-40-T18-T22-T24-T30 0425 Modulo D1 II CE + PED
LCE - LCE H
42 - 52 - 62 - 72 - 82
0425 Modulo D1 II CE + PED91/2/4 - 101/2/4 - 121/2/4
141/2/4 - 161/2/4 - 174 - 194 - 214
LEW
41-42-51-52-61-62-71-72-81-82-91-92-111-112-
0425 Modulo D1 II CE + PED
131-132-141-142-144-161-162-164-181-182

3
Serial number
Code
Date of production
Cooling capacity (W)
Heating capacity (W)
Power supply
Power input (kW)
Weight (kg)
Max power input (kW)
Max running amperage (A)
HP Power input (kW)
Refrigerant
Max refrigerant pressure (bar)
Max refrigerant temperature (°C)
Made in Italy
CATEGORIA 2
Galletti S.p.A. via L.Romagnoli 12/a
40010 Bentivoglio (BO) Italia
WATER CHILLERS AND HEAT PUMPS ARE IN ACORDARCE WITH THE
LAW 97/23/CE (PED) FILLING IN D1 FORM, APPROVED BY THE THIRD
NOTIFIED BODY ICIM N°0425.
All copying, even partial, of this manual is strictly forbidden.RG66007970 - Rev 01
UNIT IDENTIFICATION
The unit data are reported on the rating label in this page.
THE LABEL SHOWS THE FOLLOWING DATA:
- Series and size of the unit
- Date of manufacture
- Main technical data
- Manufacturer
- The label is applied on the unit, usually on the enclosing panels beside
the condenser coil.
IMPORTANT: NEVER REMOVE THE LABEL
- Serial number of the unit
- The serial number permits to identify the technical characteristics and
the components installed.
- Without this datum it will be impossible to identify the unit correctly.
The technical and dimensional data provided herein may undergo changes
in connection with product improvements.
TRANSLATION OF ORIGINAL INSTRUCTIONS
- For any further information, contact the manufacturer:
[email protected]
- To get the weight of the unit, refer to the User Manual, Rated technical
data table.

MPI DC
4
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The actual thermal load of an air conditioning system is less than 60% of the
rated load capacity 90% of the time.
In case of low power installations with a low number of indoor units and low
water content, operation under part load conditions is especially critical.
In order to ensure that the unit functions correctly the variation of the power
delivered by the unit is necessary.
The inverter controller controls the compressor rpm through the modulation
of the refrigerant rate, the cooling capacity and the electrical input.
The operating logic of MPI DC units allows an accurate adjustment of the
outlet water temperature according to the thermal load conditions:
The PID control algorithm allows to adjust the water temperature within
+/- 15%.
The inverter controller allows to adjust the capacity and the input of the
compressor to the actual thermal load and makes it possible to considerably
reduce electrical intakes at the compressor start-up (reduction of starting
currents) and during the operation under partial loads.
The spinning airtight scroll compressors (for models from MPI014 DC to
MPI029 DC) or Twin Rotary compressors (for models from MPI08 DC to
MPI010 DC) are equipped with motor protection against overheating and
overcurrents.
Mounted on anti-vibration supports, complete with oil charge, they
are enclosed in a soundproofed compartment and equipped with an
automatically controlled oil heating system to avoid oil dilution by the
refrigerant when the compressor is stopped.
The compressor motor is a permanent magnets, brushless, alternating current
motor controlled by a trapezoidal wave driver operating in the frequency field
ranging from 30 to 110 Hz (BLDC “Brushless Direct Current” Technology)
The electronic control system allows the setpoint to be adjusted automatically
according to the outdoor temperature in order to reduce consumption and
broaden the working temperature range.
The condensation control adapts the fan rpm to the actual working conditions
1 THE SERIES
This results in better working conditions, reduction of sound levels under
partial load conditions and possibility of operating in cooling mode beyond
conventionalworkinglimits(uptoanoutdoorairtemperatureof-10°C).
In heat pump operation the exclusive defrost system can correctly identify an
impairment of performance in the outdoor exchanger due to the formation of
ice and minimise the process time in relation to normal operation of the unit.
> PERMANENT MAGNETS ELECTRIC SYNCHRONOUS MOTOR
> LOWER MOTOR INERTIA EFFECT
> COMPACT DIMENSIONS
> LOWER NOISE EMISSIONS
> NO ROTOR LOSSES DUE TO CURRENTS AND INDUCTION -> HIGHER
EFFICIENCY AT PART LOAD
> HIGHER COMPRESSOR ISENTROPIC EFFICIENCY
The MPI DC series heat pump units can be also used in applications
to produce domestic hot water, 365 days/year, when connected to
"MYCHILLER DHW" (remote control/management panel).
For general hydraulic schemes, see the control panel manual.
REMARK: this applications are not compatible with the option: water
buffer tank (on board)

5
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STRUCTURE
Painted galvanised sheet steel structure (RAL9002) for an attractive look and
effective resistance to corrosive agents.
Fastening devices are made of non-oxidizable materials, or carbon steel that
has undergone surface-passivating treatments.
The compressor compartment is completely sealed and may be accessed on
3 sides thanks to easy-to-remove panels that greatly simplify maintenance
and/or inspection.
Sound insulation, available on request, can further reduce the noise emissions
of the unit.
CUSTOMISED HYDRAULIC KIT
- High head pump made entirely of stainless steel, already configured for use
with mixtures of water and ethylene glycol up to 35% and provided with
internal thermal protection. It is housed in the compressor compartment
and is easy to reach thanks to the removable perimeter panels.
- Expansion tank
- Safety valve.
- Filling cock (included).
- Automatic vent valve.
- Water differential pressure switch and outlet water temperature probe with
anti-freeze thermostat function.
- Mechanical Y filter supplied as a standard feature on all models to protect
the evaporator (included).
COOLING CIRCUIT
- BLDC-type compressor housed in a compartment that can be sound
insulated.
- Brazed plate heat exchangers made of STAINLESS steel and optimised for
use with R410A.
- Finned block condenser with 8 mm copper piping and aluminium fins,
characterised by ample heat exchange surfaces.
- Dehydrating filter.
- Flow indicator with humidity indicator.
- Thermostatic valve with external equalization and integrated MOP function.
- Cycle-reversing valve (MPI DC H).
- Single-acting valves (MPI DC H).
- Liquid receiver (MPI DC H).
- High and low pressure switches.
- Safety valve.
- Schrader valves for checks and/or maintenance.
- Refrigerant pressure gauges (optional).
FAN DRIVE ASSEMBLY
Electric fan with 6-pole external rotor motor directly keyed to the axial fan,
with internal thermal protection on the windings, complete with safety grille
and dedicated supporting structure.
The fan is housed in a special compartment having a profile designed to
optimise ventilation.
The use of finned block heat exchangers with 8mm diameter pipes reduces
pressure drops on the air side, thus significantly improving the noise levels
of the units.
The condensation control system continuously and automatically regulates
the fan speed, further limiting the noise emissions of the unit during nighttime
operation and under partial load conditions.
FINNED BLOCK HEAT EXCHANGER
Made of 8mm diameter copper pipes and aluminium fins, generously sized.
The special engineering of the heat exchangers allows defrost cycles to be
carried out at maximum speed in the models with heat pump operation, which
brings clear benefits in terms of the integrated efficiency of the whole cycle.
ELECTRONIC MICROPROCESSOR CONTROL
The electronic control enables the complete control of the MPI DC unit. It can
be easily accessed through a polycarbonate flap with IP65 protection rating.
The modulation of capacity enables the unit to operate even in systems where
the water content is low, without the use of an inertial water buffer tank. By
reading the outdoor air temperature, it can automatically change the setpoint
to adapt it to the outdoor load conditions or keep the unit running even in the
harshest winter conditions.
The basic controller comes complete with the MODBUS protocol and enables
an immediate connection to ERGO networks.
Main functions:
- Continuous modulation of compressor capacity.
- Control of outlet temperature
- Control over the temperature of water entering the evaporator.
- Defrosting management (MPI DC-H)
- Control of fan speed (optional)
- Complete alarm management.
- Dynamic control of the setpoint according to the outdoor air temperature.
- Can be connected to an RS485 serial line for supervisory / teleassistance
operation
- Option of connecting a remote terminal that duplicates the control functions
Devices controlled:
- Compressor
- Fans
- Cycle-reversing valve (MPI DC-H).
- Water circulation pump
- Antifreeze heating elements (optional)
- Alarm signalling relay
On request, it is possible to install the advanced controller whose functions
extend to:
- LAN networks
- Smart Defrost System
ELECTRIC CONTROL BOARD
Electric control board constructed and wired in accordance with the Directive
on electromagnetic compatibility and related standards. Made of steel sheet,
it is also protected by the enclosing panels of the unit.
OPTIONS
Incorporable hydronic kits
Condensation control
Low noise execution
Refrigerant pressure gauges
Antifreeze heating elements on the water circuit
Electronic thermostatic valve
Heat recovery 25% (chiller)
Special exchangers (hydrophilic treatment, copper-copper, cataphoresis,
anti-corrosion)
ACCESSORIES AVAILABLE
Remote control boards
Base vibration dampers
Metal grilles to protect exchangers
MYCHILLER DHW
2 CONSTRUCTIVE FEATURES

MPI DC
6
MPI DC 08
All copying, even partial, of this manual is strictly forbidden. RG66007970 - Rev 01
3 LAYOUT OF COMPONENTS
Description
1R410A - air exchanger
2 R410A - water exchanger
3 Fans
4 Water differential pressure switch (fan compartment)
5 Automatic air vent valve
6 Expansion tank (fan compartment)
7 Buffer tank (accessory)
8 4-way valve (MPI DC H)
9 Electronic expansion valves
10 Water safety valve
11 Liquid receiver
12 Circulation pump
13 Compressor
14 Refrigerant filter
15 Low pressure switch and charge inlet
16 High pressure switch and charge inlet
17 Water pressure gauge
18 Water filling point
19 Inverter

7
MPI DC 10 ÷ 18
All copying, even partial, of this manual is strictly forbidden.RG66007970 - Rev 01
3 LAYOUT OF COMPONENTS
DESCRIPTION
1R410A - air exchanger
2 R410A - water exchanger
3 Fans
4 Water differential pressure switch (fan compartment)
5 Automatic air vent valve
6 Expansion tank (fan compartment)
7 Buffer tank (accessory)
8 4-way valve (MPI DC H)
9 Electronic expansion valves
10 Water safety valve
11 Liquid receiver (fan compartment)
12 Circulation pump
13 Compressor
14 Refrigerant filter
15 Low pressure switch and charge inlet
16 High pressure switch and charge inlet
17 Water pressure gauge
18 Water filling point
19 Inverter

MPI DC
8
MPI DC 23 - 29
All copying, even partial, of this manual is strictly forbidden. RG66007970 - Rev 01
3 LAYOUT OF COMPONENTS
DESCRIPTION
1R410A - air exchanger
2 R410A - water exchanger
3 Fans
4 Water differential pressure switch (fan compartment)
5 Automatic air vent valve
6 Expansion tank (fan compartment)
7 Buffer tank (accessory)
8 4-way valve (MPI DC H)
9 Electronic expansion valves
10 Water safety valve
11 Liquid receiver (fan compartment)
12 Circulation pump
13 Compressor
14 Refrigerant filter
15 Low pressure switch and charge inlet
16 High pressure switch and charge inlet
17 Water pressure gauge
18 Water filling point
19 Inverter

9
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4 MODELS AND CONFIGURATIONS
FIELD OF APPLICATION
MPI DC air-condensed water chillers and heat pumps have been designed to cool and heat water for air conditioning and heating systems in residential or
commercial buildings.
The MPI DC units are designed for outdoor installation (protection rating IP24), in a position not accessible to the public.
If protection grilles (accessory) are not provided or if the unit can be reached by unauthorized persons, special protection barriers should be provided in
order to prevent access to the finned coil
Do not install the unit in places where inflammable gases or powders are present.
MODELS AND VERSIONS
All models are charged with R410A refrigerant.
N.B. The choice of some options may preclude the choice of others or make some other fields become mandatory. Contact Galletti S.p.A. for verification
Complete unit code M P I D C 0 1 4 H 0 A A A 1 0 0 C 0 0 0 0 0 0 0 2
Version 0
Single compressor 0
Model (size) 1 4
Operation H
Water chiller C
Heat pump H
Supply voltage 0
Standard 400 - 3N - 50 0
Single-phase M
Refrigerant A
R410A high efficiency A
Revision A
Initial A
Expansion valve A
Electronic valve A
Pump and accessories 1
Modulating pump – expansion tank – filling tap 1
BLDC pump – expansion tank – filling tap 2
Inertial buffer tank 0
Absent 0
Present + expansion tank S
Heat recovery 0
Absent 0
Condensation control C
With adjustment of air flow rate C
BLDC fans E
Antifreeze kit 0
Absent 0
For units with evaporator only E
For units with evaporator, pump and expansion tank P
For units with evaporator, pump, expansion tank and tank S
Sound insulation 0
Absent 0
Compressor compartment soundproofing 1
Compressor hoods 2
Option 1 + option 2 3
Cooling accessories 0
None 0
Refrigerant pressure gauges M
Remote control / Communication 0
Absent 0
Output RS485 (Modbus or Carel protocol) 2
Simplified remote control (PCDS) S
PCOXS microprocessor remote control X
Clock board C
Special coils 0
Standard O
Copper - copper R
Cataphoresis C
Corrosion-proof B
Hydrophilic I
Condenser protection grille 0
Absent 0
Present G
Additional options 0
Absent 0
Heating cable for heat exchanger (heat pump version only) 4
Control 2
pCOXS 2

MPI DC
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5 TECHNICAL FEATURES
5.1 RATED TECHNICAL DATA OF WATER CHILLERS
* Weights refer to model with pump and buffer tank
- Coolingcapacity:outdoorairtemperature35°C,watertemperature12°C-7°C
- Sound power measured according to standards ISO 3741 - ISO 3744 and EN 29614-1
- Sound pressure measured at a distance of 10 m and a height of 1.5 m above the ground in an open field (fan side).
- The maximum electrical input is the mains electricity that must be available in order for the unit to work.
- The maximum current absorption refers to the current that will trigger the internal safety devices of the unit. It is the maximum current allowed in the unit.
This value may never be exceeded; it must be used as a reference for determining the size of the power supply line and the related safety devices (refer
to the wiring diagram supplied with the units).
MPI DC - C 010 M 014 018 023 029
Power supply V - ph - Hz 230-1-50 400-3N-50 400-3N-50 400-3N-50 400-3N-50
Rated cooling capacity kW 10,6 14,3 18,2 22,9 29,1
Total power input kW 3,35 4,78 7,63 7,77 12,3
EER (rated capacity) 3,16 2,99 2,39 2,95 2,37
Total power input with pump kW 3,6 5,3 8,2 8,3 12,9
Maximum power input kW 5,6 7,1 10,7 10,8 21,9
Maximum electrical input A 26,6 20,0 22,0 28,5 43,0
Starting current A 10 10 10 10 10
No. of compressors / circuits 1 / 1 1 / 1 1 / 1 1 / 1 1 / 1
Refrigerant charge kg 3,5 4,1 4,1 5,7 5,7
Low / high pressure switch bar 42 / 2 42 / 2 42 / 2 42 / 2 42 / 2
No. of axial fans 2 2 2 4 4
Air flow rate m3/h 6.939 6.939 6.939 11.438 11.438
Water flow l/s 1826 2454 3132 3935 4992
Diameter of water connections “ 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4
Pressure drop, water side kPa 23 35 35 36 36
Available head kPa 130 120 120 98 98
Water content, excluding optionals dm33,0 3,0 3,0 5,0 5,0
Expansion tank dm355555
Buffer tank dm330 30 30 50 50
Height mm 1250 1250 1250 1300 1300
Length mm 1220 1220 1220 1565 1565
Depth mm 560 560 560 600 600
Sound power level dB(A) 70 71 71 74 74
Sound pressure level dB(A) 42 43 43 46 46
Transport weight * kg 210 210 210 285 285
Operating weight * kg 235 235 235 335 335