Galletti HWMC 10 EC, HWMC 13 EC, HWMC Series, HWMC 10, HWMC 18 EC Installation, Use And Maintenance Manual

GB

INSTALLATION, USE AND MAINTENANCE MANUAL

HWMC

10 kW - 29 kW

Total heat recovery reversible multi-purpose heat pumps - DC INVERTER

HWMC

1 THE SERIES HWMC ......................................................................................................................................................................................................................5

1.1 Field of application

1.2 Models and versions

1.3 Description of components

1.4 Plumbing diagrams
2 INSPECTION, HANDLING, DIMENSIONS AND SITING

2.1 Inspection

2.2 Handling

2.3 Dimensions

2.4 Siting

2.4.1 Installation clearance requirements

2.5 Position of vibration dampers
3 WATER AND ELECTRICAL CONNECTIONS

3.1 Water connections

3.1.1 Water connections

3.1.2 Recommended water circuit

3.1.3 Filling the system

3.1.4 BASE Multi-purpose system DIAGRAM

3.2 Electrical connection

3.3 Electrical specifications
4 STARTING UP

4.1 Preliminary checks
5 OPERATING LIMITS

5.1 Operating limits in chiller mode

5.2 Operating limits in heat pump mode

5.3 Operating limits in DHW total recovery

5.4 Operating limits only in DHW production

5.5 Thermal carrier fluid
6 CONTROL AND SAFETY DEVICES

6.1 Control devices

6.1.1 Service thermostat

6.1.2 Control device settings

6.2 Safety devices

6.2.1 High pressure switch

6.2.2 Low pressure switch

6.2.3 Anti-recycle timer

6.2.4 Antifreeze thermostat

6.2.5 Water differential pressure switch

6.2.6 Water safety valve

6.2.7 Safety device settings

7 ROUTINE MAINTENANCE AND CHECKS

7.1 Checks to be performed by the user

7.2 Checks and maintenance to be performed by specialised personnel
8 RETIRING THE UNIT
9 TECHNICAL CHARACTERISTICS

9.1 Rated technical data of heat pumps
10 COOLING CIRCUIT DIAGRAMS
11 TROUBLESHOOTING

.....................................................................................................................................................................................................................................16

..........................................................................................................................................................................................................................................19

.......................................................................................................................................................................................................................5

.....................................................................................................................................................................................................................6

...........................................................................................................................................................................................................7

.....................................................................................................................................................................................................................13

..................................................................................................................................................................16

...................................................................................................................................................................................................................................16

.................................................................................................................................................................................................................................17

...............................................................................................................................................................................................19

.....................................................................................................................................................................................................21

...................................................................................................................................................................................22

......................................................................................................................................................................................................................22

.......................................................................................................................................................................................................................22

.........................................................................................................................................................................................................22

.........................................................................................................................................................................................................................23

.........................................................................................................................................................................................24

..................................................................................................................................................................................................................25

..............................................................................................................................................................................................................26

..............................................................................................................................................................................................................................27

.....................................................................................................................................................................................................................27

.....................................................................................................................................................................................................................28

..................................................................................................................................................................................................28

...........................................................................................................................................................................................28

......................................................................................................................................................................................29

....................................................................................................................................................................................29

...................................................................................................................................................................................................................29

................................................................................................................................................................................................30

...........................................................................................................................................................................................................................30

.......................................................................................................................................................................................................................30

.................................................................................................................................................................................................................30

............................................................................................................................................................................................................................30

...................................................................................................................................................................................................................30

...................................................................................................................................................................................................................30

.........................................................................................................................................................................................................................30

...................................................................................................................................................................................................................30

.................................................................................................................................................................................................30

........................................................................................................................................................................................................................30

..................................................................................................................................................................................................................30

......................................................................................................................................................................................31

...........................................................................................................................................................................................31

.........................................................................................................................................31

....................................................................................................................................................................................................................31

..................................................................................................................................................................................................32

...........................................................................................................................................................................................32

....................................................................................................................................................................................................33

...................................................................................................................................................................................................................36

TRANSLATION OF ORIGINAL INSTRUCTIONS

I REFRIGERATORI D'ACQUA E LE POMPE DI CALORE SONO CONFORMI
ALLA DIRETTIVA 97/23/CE (PED) ATTRAVERSO MODULO D1,
APPROVATO DALL'ENTE TERZO NOTIFICATO ICIM N°0425.

The technical and dimensional data provided herein may undergo changes in
connection with product improvements.

2

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

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

Galletti S.p.A. via L.Romagnoli 12/a

40010 Bentivoglio (BO) Italia

Made in Italy

CATEGORIA 2

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)

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

3

HWMC

GENERAL CAUTIONARY NOTES

- Please keep this manual complete and in good condition for the entire life of the machine.

- Carefully read all the information contained in this manual, paying special attention to sections marked “Important” and “WARNING”; failure to comply
with the instructions provided could result in injury to persons or damage to the equipment.

- Should a fault occur, consult this manual and if necessary contact the nearest Galletti S.p.A. service centre.

- All installation and maintenance operations must be carried out by qualified personnel, unless otherwise indicated in this manual.

- FIRST START-UP MAY BE CARRIED OUT SOLELY BY QUALIFIED TECHNICIANS DULY AUTHORIZED BY GALLETTI S.P.A. (SEE ENCLOSURE)

- Before performing any work on the unit, disconnect it from the power supply.

- Failure to comply with the rules provided in this manual will result in the immediate invalidation of the warranty.

- Galletti S.p.A. shall not accept any liability for injury or damage resulting from improper use of the equipment or failure to comply with the directions
provided in this manual and on the unit itself.

- It is mandatory to install filters to protect the heat exchangers. Failure to do so will invalidate the warranty.

- For any further information, contact the manufacturer: [e-mail]

- To get the weight of the unit, refer to the User Manual, Rated technical data table.

IMPORTANT:

1) (a) Do not use heat transfer fluids other than those specified.

(b) This unit is not suitable for use in Atex environment or with inflammable heat transfer fluids.
(c) Use original factory parts only.
(2) Use appropriate PPE (refrigerant protection gloves, protective goggles).
(3) 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.

(4) Upstream from the power supply it is necessary to install a differential switch for protection against earth connection failure.

SAFETY SYMBOLS

Carefully read this manual

USE APPROPRIATE PPE (REFRIGERANT PROTECTION GLOVES, PROTECTIVE GOGGLES).

WARNING

Use individual protective

devices

4

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

1 THE SERIES HWMC

1.1 FIELD OF APPLICATION

The DC INVERTER multi-purpose HWMC units have been designed to cool
and heat water for air conditioning and heating systems and for the production
of DHW for residential or commercial use. The units are “real” multipurpose
units, with 4 water collections, whose operating modes are described below:

1. Cold water production in summertime mode, for the air conditioning

system (air condensing system on the finned exchanger)

2. Cold water production in the summertime mode, for the air conditioning

system, with TOTAL CONDENSATION HEAT RECOVERY (for the production
of DHW by means of a dedicated plate exchanger)

3. Production of hot water in wintertime mode, for the heating system,

functioning as a traditional heat pump (air evaporation on the heat
exchanger side and water condensation on the dedicated plate heat
exchanger on the system side)

4. Domestic hot water production in winter time mode, temporarily stopping

hot water production for air heating purpose (DHW priority);

5. DHW production only (in particular in mid seasons and in summertime

and wintertime)

Warning

When reference is made to the production of domestic
hot water, what is meant is the storage of thermal energy in a tank of
“technical” water. Water for domestic use must be heated by means
of a stainless steel coil contained inside the storage tank, in this way
it is possible to avoid storing domestic water and it is not necessary
to provide for an anti-Legionella cycle (see recommended plumbing
layouts for further details).

Warning

HWMCunits are NOT suitable for use as “rapid” heaters."

The HWMC 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.

Winter configuration

V1 V2

V5

V4

V3

HEAT

PUMP

DHW / Springtime (operating 365 days a year)

V1 V2

V5

V4

V3

DHW

S2S1

S2S1

DHW

S3

Summer configuration (total heat recovery)

V4

V4

V1 V2

V5

V3

HEAT

PUMP

Summer configuration

V1 V2

V5

V3

S2S1

DHW

DHW

S2S1

S3

HEAT

PUMP

S3

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

HEAT

PUMP

S3

5

HWMC

1 THE SERIES HWMC

1.2 MODELS AND VERSIONS

The HWMC series features 5 models of varying capacity, indicatively from
10 to 29 kW in cooling versions (9-32 kW in heating versions) in nominal
conditions (ref. EN14511).
All models are charged with R410A refrigerant and equipped with compressors
optimised for heat pump applications and domestic hot water production in
all seasons.
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 HWMC010H0AAA100CE0000000

Version 0

Single compressor

400 - 3N - 50 + circuit breakers 2

Single-phase + circuit breakers 4

0

Tan d em T

Model (size) 1 0

Operation

Supply voltage 0

Standard 400 - 3N - 50

Single-phase M

R410A high efficiency

2 Modulating pumps (system+DHW side) 5

H
H

0

Refrigerant A

(Field 1) Expansion valve A

(Field 2) Pump and accessories

2 EC pumps (system+DHW side) 6

External electric heating element control 2

MYCHILLER BASE remote control (option 1 - 3 field 13 disabling) B
MYCHILLER PLUS remote control (option 1 - 3 field 13 disabling) P

A

Revision A

Initial

A

Electronic valve

(Field 3) Inertial buffer tank 0

Present, system side S

(Field 4) Auxiliary contacts 0

Standard with condensation control

Additional protection for 1 pump and tank 2

Additional protection for 2 pumps and tank 4

A

1

Absent

0

Absent

User tank sensor 1

Opt 1 + Opt 2 3

(Field 5) Fans C

BLDC with electronic control E

(Field 6) Antifreeze kit E

Base (plate exchangers only)

Additional protection for 1 pump 1

Additional protection for 2 pumps 3

(Field 7) Sound insulation 0

Compressor compartment soundproofing 1

Compressor silencing housings 2

0

Opt 1 + Opt 2 3

(Field 8) Cooling accessories 0

Refrigerant pressure gauges M

(Field 9) Remote control 0

ADVANCED pGD1 remote control C

(Field 10) Special exchangers 0

C

Absent

(Field 11) Protective grille 0

E

0

None

0

Absent

0

Standard

Copper - copper R

Cataphoresis C

Corrosion-proof B

Hydrophilic GB

(Field 12) Additional options 0

Exchanger heating cable 1

(Field 13) Additional cards 0

O

Absent

Present G

Absent

RS485 (Carel / Modbus) 1

Clock card 2

0

0

Absent

LON car d 3

0

6

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

1 THE SERIES HWMC

1.3 DESCRIPTION OF COMPONENTS

HWMC 10 EC PUMPS

HWMC 10 EC PUMPS

Description
12 Circulation pump

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

7

HWMC

1 THE SERIES HWMC

1.3 DESCRIPTION OF COMPONENTS

HWMC 10

Description
1 R410A - air exchanger
2 R410A - water exchanger
3 Fan
4 Water differential pressure switch (no. 1 fan compartment)
5 Automatic air vent valve
6 Expansion tank (fan compartment)
7 Buffer tank
8 Refrigerant solenoid valve
9 Electronic thermostatic valve
10 Water safety valve
11 Liquid receiver (fan compartment)
12 Circulation pump
13 Compressor
14 Refrigerant filter
15 Low pressure switch
16 High pressure switch
17 Water pressure gauge
18 Water filling point

8

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

1 THE SERIES HWMC

1.3 DESCRIPTION OF COMPONENTS

HWMC 13 - 18 EC PUMPS

Description
12 Circulation pump

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

9

HWMC

1 THE SERIES HWMC

1.3 DESCRIPTION OF COMPONENTS

HWMC 13 - 18

Description
1 R410A - air exchanger
2 R410A - water exchanger
3 Fan
4 Water differential pressure switch (no. 1 fan compartment)
5 Automatic air vent valve
6 Expansion tank (fan compartment)
7 Buffer tank
8 Refrigerant solenoid valve
9 Electronic thermostatic valve
10 Water safety valve
11 Liquid receiver (fan compartment)
12 Circulation pump
13 Compressor
14 Refrigerant filter
15 Low pressure switch
16 High pressure switch
17 Water pressure gauge
18 Water filling point

10

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

1 THE SERIES HWMC

1.3 DESCRIPTION OF COMPONENTS

HWMC 23 - 29 FANS HWMC 23 - 29 EC PUMPS

HWMC 23 - 29 EC PUMPS

Description
12 Circulation pump

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

11

HWMC

1 THE SERIES HWMC

1.3 DESCRIPTION OF COMPONENTS

HWMC 23 - 29

Description
1 R410A - air exchanger
2 R410A - water exchanger
3 Fan
4 Water differential pressure switch
5 Automatic air vent valve
6 Expansion tank (fan compartment)
7 Buffer tank
8 Refrigerant solenoid valve
9 Electronic thermostatic valve
10 Water safety valve
11 Liquid receiver (fan compartment)
12 Circulation pump
13 Compressor
14 Refrigerant filter
15 Low pressure switch
16 High pressure switch
17 Water pressure gauge
18 Water filling point

12

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

1 THE SERIES HWMC

1.4 PLUMBING DIAGRAMS

HWMC (EVAPORATOR AND PUMP)HWMC (EVAPORATOR)

OPTIONAL

SYSTEM SIDE

DHW SIDE

OPTIONAL

SYSTEM SIDE

Legend
VR Filling valve
VS Safety valve

EV Evaporator
PD Differential pressure switch
MA Water pressure gauge
VAS Air vent valve
VE Expansion tank
P Pump
RS Drainage valve

RC Water filling cock
VU Check valve

DHW SIDE

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

13

HWMC

1 THE SERIES HWMC

1.4 PLUMBING DIAGRAMS

HWMC (EVAPORATOR AND TANK)HWMC (EVAPORATOR, PUMP AND TANK)

FRAME 2 ONLY

OPTIONAL

SYSTEM SIDE

OPTIONAL

DHW SIDE

FRAME 2 ONLY

SYSTEM SIDE

DHW SIDE

Legend
VR Filling valve
VS Safety valve

EV Evaporator
PD Differential pressure switch
MA Water pressure gauge
VAS Air vent valve
VE Expansion tank
P Pump
RS Drainage valve

RC Water filling cock
VU Check valve
SA Buffer tank

14

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

1 THE SERIES HWMC

1.4 PLUMBING DIAGRAMS

OPTIONAL

SYSTEM SIDE

HWMC (EVAPORATOR AND DUAL PUMP)HWMC (EVAPORATOR, DUAL PUMP AND TANK)

DHW SIDE

FRAME 2 ONLY

SYSTEM SIDE

OPTIONAL

DHW SIDE

Legend
VR Filling valve
VS Safety valve

EV Evaporator
PD Differential pressure switch
MA Water pressure gauge
VAS Air vent valve
VE Expansion tank
P Pump
RS Drainage valve

RC Water filling cock
VU Check valve
SA Buffer tank

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

15

HWMC

2 INSPECTION, HANDLING, DIMENSIONS AND
SITING

2.1 INSPECTION

On receiving the unit, check that the packing is intact: the machine left the
factory in perfect conditions and after thorough inspection.
Should you detect any signs of damage, immediately report them to the
carrier and note them on the delivery slip.
Galletti S.p.A. must be notified of the entity of the damage within 8 days of
the delivery date.
Check that the following items are present:

- putting into service report,

- wiring diagram,

- warranty certificate and list of authorised service centres,

- make sure that this manual is intact (40 pages).

2.2 HANDLING

During handling it is compulsory to check dimensions, weights, centre of
gravity and anchorages. Check as well that lifting and positioning devices
conform to the current safety regulations.
The unit leaves the factory screwed onto a wooden pallet, which allows
it to be easily conveyed with a forklift truck. After removing the unit from
the pallet, handle it gently, without applying excessive pressure on the side
panels, finned coil and fan grille.
You should collect and separate the packing materials (wood, cardboard,
nylon etc.) and make them available for recycling in order to minimise their
environmental impact.
Before lifting, remove the screws fastening the base of the unit to the wood
platform.
The unit should be lifted using Ø1½” GAS steel pipes at least 3mm thick,
to be inserted in the round holes provided on the base side members (see
figure) and identified by means of stickers. The pipes, which should protrude
by at least 250-300mm on every side, must be slung with ropes of equal
length secured to the lifting hook (provide stops at the ends of the pipes to
prevent the ropes from slipping off due to the weight).
Use ropes or belts whose length exceeds the machine height and place
spacer boards and bars on the top of the unit to avoid damaging the sides
and upper part of the unit itself.
At this point, before final positioning, it is possible to install the vibration­damping supports (optional).
WARNING: In all lifting operations make sure that the unit is securely anchored
in order to prevent accidental falls or overturning.

16

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

2 INSPECTION, HANDLING, DIMENSIONS AND

SITING

2.3 DIMENSIONS

HWMC 10 ÷ 13 ÷ 18

Legend:
1 Water inlet 1" ¼ female
2 Sanitary hot water inlet 1" ¼ female
3 Water outlet 1" ¼ female
2 Sanitary hot water outlet 1" ¼ female
5 Safety valve discharge outlet with rubber ring holder
6 Water supply ½" male (optional tap)
7 Water drainage ½" female
8 Sanitary hot water drainage ½" female
9 Power supply Ø 28 mm
10 Electric control board
11 Fastening points for vibration dampers

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

17

HWMC

2 INSPECTION, HANDLING, DIMENSIONS AND

SITING

2.3 DIMENSIONS

HWMC 23 ÷ 29

Legend:
1 Water inlet 1" ¼ female
2 Sanitary hot water inlet 1" ¼ female
3 Water outlet 1" ¼ female
2 Sanitary hot water outlet 1" ¼ female
5 Safety valve discharge outlet with rubber ring holder
6 Water supply ½" male (optional tap)
7 Water drainage ½" female
8 Sanitary hot water drainage ½" female
9 Power supply Ø 28 mm
10 Electric control board
11 Fastening points for vibration dampers

18

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

2 INSPECTION, HANDLING, DIMENSIONS AND
SITING

2.4 SITING

It is important to bear in mind the following aspects when choosing the best
site for installing the unit:

- size and origin of water pipes;

- location of the power supply;

- solidity of the supporting surface;

- avoid obstacles to the outflow of air from the fan which could cause back
suction (see section on “installation clearance requirements”);

- direction of prevalent winds: (position the unit so that prevalent winds
do not alter the fan air flow). A prevalent wind blowing from a direction
opposite to the fan air flow will reduce the maximum air temperature
to a lower value than specified in the operating limits, a wind blowing
in the same direction as the fan air flow will increase the minimum air
temperature to a higher value than specified in the operating limits. Also
in the heat pump mode, wind may have the effect of reducing the unit's
operating range.

- avoid the possible reverberation of sound waves; do not install the unit
in narrow or cramped spaces;

- ensure adequate accessibility for maintenance or repairs (see section
on “installation clearance requirements”).

This device is not intended to be used by children or by people with
physical, sensory or mental impairments, except under supervision. Make
sure that children do not have access to the device.

2.4.1 INSTALLATION CLEARANCE REQUIREMENTS

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, 2 and 3.
There must be no obstacles blocking the path of the air flow from the fans.
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.

In the design of the HWMC series, special care has been taken to minimise
noise and vibrations transmitted to the ground.
Even greater insulation may be obtained, however, by using vibration damping
base supports (available as optional accessories).
If vibration damping base supports are adopted, it is strongly recommended
also to use vibration damping couplings on the water pipes.
Whenever the unit is to be sited on unstable ground (various types of soil,
gardens, etc.) it is a good idea to provide a supporting base of adequate
dimensions.

Warning
produce condensation..

while operating in heating or DHW mode, the units

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

19

HWMC

2 INSPECTION, HANDLING, DIMENSIONS AND
SITING

2.4 SITING

2.4.1 INSTALLATION CLEARANCE REQUIREMENTS

1

HWMC 10 ÷ 18

COIL PLUMBING CONNECTION SIDE

COIL SIDE

ELECTRIC CONTROL BOARD

2

ELECTRIC CONTROL BOARD

HWMC 23 ÷ 29

COIL PLUMBING CONNECTION SIDE

COIL SIDE

20

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

2 INSPECTION, HANDLING, DIMENSIONS AND
SITING

2.5 POSITIONING OF VIBRATION DAMPERS (ACCESSORY)

HWMC NO. OF VIBRATION DAMPERS

10 - 18 4
23 - 29 4

Vibration dampers

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

21

HWMC

3 WATER AND ELECTRICAL CONNECTIONS

3.1 WATER CONNECTION

All units belonging to the HWMC series are equipped with water differential
pressure switch, safety valve, water differential pressure switch, safety valve,
water pressure gauge, automatic vent valve and drainage valve.
According to the specific configuration they can be equipped with pump,
expansion tank and buffer tank.

3.1.1 WATER CONNECTIONS

Warning

connections tightly in place using a hexagonal wrench or make sure
that they do not rotate to prevent the pipes inside the unit from being
damaged (see figure).

3.1.2 RECOMMENDED WATER CIRCUIT

Warning!

are no open flames in proximity to or inside the unit.

When setting up the water circuit, it is advisable to equip it with:

- valves for regulating (VI) the unit on the water pipes, immediately upstream
and downstream from the unit itself, to be used in the event maintenance
work is required;

- a mechanical filter supplied as standard (FM) (MANDATORY!) on the
pipes feeding the unit, in proximity to the latter;

- a mechanical filter supplied as standard (FM) (MANDATORY!) and a
check valve (VNR), on the supply line upstream from the filling tap (RC);

- an air vent valve at the highest point of the circuit;

- escape pipe for the safety valve (VS), which, in the event the safety valve
opens, diverts the jet of water to an area where it cannot harm persons
or damage property (Important!);

- vibration-damping couplings (GA) on the pipes to prevent vibrations from
being transmitted toward the system.

Important!It is advisable to ensure that the pipes connected upstream
and downstream from the unit are not smaller in diameter than the
plumbing connections of the unit itself.

While connecting the taps, hold the unit's plumbing

when making the plumbing connections, make sure there

Important! During winter time periods of quiescence the water circuit must
be emptied to prevent damages caused by freezing; in alternatively, the
circuit may be filled with a mixture of water and glycol; the percentage
of glycol necessary will depend on the lowest forecast temperature
(see table):

Percentage by weight of

ethylene glycol (%)

00

10 -4

15 -8

20 -14

30 -18

Important! If different antifreeze product is to be used, please contact
the manufacturer.

Failure to install filters and vibration dampers may cause problems of clogging,
breakages and noise, for which the manufacturer may not be held liable.

Mixture freezing temperature

(°C)

22

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

3 WATER AND ELECTRICAL CONNECTIONS

3.1 WATER CONNECTION

3.1.2 RECOMMENDED WATER CIRCUIT

FRAME 2 ONLY

SYSTEM SIDE

OPTIONAL

Legend

VS Safety valve
EV Evaporator
PD Differential pressure switch
MA Water pressure gauge
VAS Air vent valve
SA Buffer tank
VE Expansion tank
RS Drainage valve
RC Water filling cock
VI Regulating valve (not supplied)
GA Vibration-damping coupling (not supplied)
FM Mechanical filter (MANDATORY)
VNR Check valve (not supplied)
P Pump

3.1.3 FILLING THE SYSTEM

- Before you start filling, make sure that the system drainage cock is

closed.

- Open all the air vent valves of the system and of the indoor units and

chiller.

- Open the system regulating devices.

- Start filling the system by slowly opening the water fill valve (optional).

- When water starts coming out of the air vent valves of the indoor

units, close them and continue filling until the pressure gauge reading
is 1.5 bars.

DHW SIDE

Warning

Heating/cooling system circuit and domestic hot water
system circuit are separated. To fill the DHW system use a heat storage
tank (boiler).

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

23

HWMC

3 WATER AND ELECTRICAL CONNECTIONS

3.1 WATER CONNECTION

3.1.4 BASE MULTI-PURPOSE SYSTEM DIAGRAM

SOLAR HEAT

DOMESTIC HOT WATER BUFFER

TAN K

SANITARY HOT WATER STORAGE

DHW

HIGH T

HEATERS

Water supply system

Floor 1

Fan coil 2Fan coil 1

Floor 1 Floor 1

Warning

the circuit for the production of DHW must be connected
directly to the buffer tank (without interposed coil), in this way the water
content of the buffer tank will be sufficient to ensure the proper operation
of the unit (heat transfer to DHW line), thus avoiding repeated start-ups
and stops of the compressor

24

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

3 WATER AND ELECTRICAL CONNECTIONS

3.2 ELECTRICAL CONNECTIONS

Warning

emissions and at the same time to ensure that the unit complies with the
EMC Directives) produce earth leakage. This may cause the differential safety
switch to trip It is recommended to install an additional calibratable differential
switch, dedicated to the unit supply line only.

All operations must be performed by qualified ser vice personnel in accordance
with current laws and regulations. For any electrical work on the unit, refer
to the electric diagrams supplied with the unit.
It is recommended to make sure that:

- The characteristics of the mains power supply are adequate for the electrical
inputs specified in the table of electrical data.

Warning

the power supply is disconnected. Check also that the mains electricity
supply is compatible with the specifications (voltage, number of phases,
frequency) shown on the unit rating plate. The supply voltage may not
undergo fluctuations exceeding ±5% of the rated voltage. The electrical
connections must be made in accordance with the wiring diagram
provided with the unit and the regulations in force.

Warning

any undue modifications will immediately invalidate the warranty.

Important!Upstream from the electrical control panel it is mandatory to
use an omnipolar thermomagnetic circuit breaker complying with IEC-EN
standards (contact gap of at least 3 mm), with an adequate breaking
capacity and differential protection based on the electrical data table
shown below, installed as close as possible to the unit.
For the unit power supply line use H07RN-F- type flexible cables having
the cross sectional area shown in the table.

the filters associated with the inverter (in order to minimize

Before carrying out any job on electrical par ts, make sure

Never attempt to modify internal electrical connections:

To route the cables use sheaths and conduits suitable for outdoor
installation.
You must provide a switch with a delayed fuse meeting the specifications
indicated in the table.

Important!Upstream from the electric control board, you must provide a
switch with a delayed fuse meeting the specifications indicated in the table.

To access the electric control board it is necessary to remove the inspection
panel (figure 4) by taking out the screws; introduce the power cable into the
unit through the bushing on the side panel; then bring it to the electric control
board through the cable holder provided.

Important!Tighten the wires securely to the terminals and clamp the
cable in place with the cable holder (figure 5).

Important!To maintain the IP protection rating a cable gland compatible
with the diameter of the sheath or power cable must be fit in the hole
on the side panel of the unit.

Important!Make sure that the length of cable inside the unit enters
the bushing from below: this is necessary to prevent rainwater from
dripping inside the unit.

Important! An earth connection is mandatory: connect the earthing
wire to the terminal provided on the electric control board (see the

electric control board layout supplied with the unit ), marked

Important!If you wish to include:

- a remote on/off switch

- a remote switch for changing over

- a remote control

it is a good idea to do so at this stage of the installation procedure, by
connecting the switches or the remote control (accessory) to the electric
control board terminals as directed in section 3.3 and using the unit wiring
diagram as your reference.

HWMC 010M 013 018 023 029

Cross-section area of power cables mm
Safety fuse F A 20 25 25 32 32
Main switch IL A 20 25 25 40 40

4 5

2

4 6 6 10 10

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

25

HWMC

3 WATER AND ELECTRICAL CONNECTIONS

3.3 ELECTRICAL SPECIFICATIONS

HWMC 010 M 013 018 023 029

Maximum power input kW 5,6 7,1 10,7 10,8 21,9
Maximum current absorption A 26,6 20 22 28,5 43
Starting absorbed current A 10 10 10 10 10
Fan motor rated power kW 0,14 0,14 0,14 0,14 0,14
Fan motor rated current A 0,64 0,64 0,64 0,64 0,64
Pump motor rated power kW 0,48 0,65 0,65 0,65 0,65
Pump motor rated current A2,73333
Power supply V/f/Hz 230/1/50 400/3N/50
Auxiliary power supply V/f/Hz
Power cables mm
PCD connecting cables mm
PCDS connecting cables mm
Safety fuse F A 20 25 25 32 32
Circuit breaker IL A 20 25 25 40 40

- The maximum power 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).

2

4 6 6 10 10

2

AWG22 AWG22 AWG22 AWG22 AWG22

2

11111

DIAGRAM SHOWING HWMC ELECTRICAL CONNECTIONS

BETWEEN REMOTE PCD CONTROL PANEL AND pCO3 REMOTE

CONTROL

Use a shielded 3 twisted
pairs

Note: Should the unit go into an alarm status, a voltage of 24V will be present
on the terminals of the electric control panel at the terminals 50/24V; where an
interface with a voltage-free contact is desired, a relay must be fitted by the
installer.

26

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

4 STARTING UP

FIRST START-UP MAY BE CARRIED OUT SOLELY BY QUALIFIED
TECHNICIANS DULY AUTHORIZED BY GALLETTI S.P.A.
(SEE ENCLOSURE)

When starting up the system for the first time, abide by the provisions of the
national laws currently in force.

4.1 PRELIMINARY CHECKS

When starting up the unit for the first time (or after a seasonal shutdown) it is
a good idea to have the following checks carried out by specialised personnel:

- Check that the electrical connections have been made properly and that
all the terminals are securely tightened.

- Check that the mains voltage corresponds to the voltage rating of the
machine, within a tolerance range of ± 5%.

If the power supply is subject to frequent voltage fluctuations, contact

Galletti S.p.A. for advice on choosing suitable protections.

- Check for refrigerant leaks, with the aid of a leak detector if necessary.

- Check that the plumbing connections have been properly made according
to the indications given on the plates to be found on the unit itself (water
inlet, water outlet etc.).

- Make sure that the pump is not blocked.

- Make sure that the water circuit is duly bled to completely eliminate the
presence of air: load the circuit gradually and open the air vent valves,
which the installer should have set in place.

Warning

are in place and secured with the fastening screws provided. To start
the unit, move the main switch to on.

To start the unit turn on the main switch. Then use the keypad of the
electronic control as directed in section 3.3 to select the cooling or
heating mode.

Warning

during periods when it is inoperative but only when it is to be taken out
of service for a prolonged period (e.g. at the end of the season). To turn
off the unit temporarily follow the directions provided in section 3.3.

Warning
device is used to disconnect the unit from the electricity supply when
there is no passage of current. i.e. when the unit is already turned OFF.

Before starting the unit, make sure all the covering panels

You should not disconnect the unit from the power supply

Do not cut off power using the main switch: the latter

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

27

HWMC

5 OPERATING LIMITS

The graphs below illustrate the operating limits of HWMC units (in the case of continuous operation) in relation to the outlet water temperature and outdoor
air temperature.

Operating limits

Inlet water temperature (°C) 8 20
Outlet water temperature (°C) 5 19 28 58

Chiller Heat pump

min max min max

1

25 42

2

Water temperature differential (°C) 3 8 3 8
Outdoor air temperature (°C) -10

3

48 -10 35

1 For transitory periods (e.g. equipment start up) values up to 25 °C are allowed

2 Value that may be reached only for outdoor air temperatures exceeding 0°C.

3 With condensation control: Outdoor air T min -15 °C

Warning The units are designed to work with water and air temperatures falling within the range defined by the operating limits.
Attempting to operate the units beyond these limits could cause irreparable damage to the units themselves.

5.1 OPERATING LIMITS IN CHILLER MODE

60

50

40

30

20

air tem p (°C)

10

CHILLER e nvelope

0

-10

-20

-15 -10 -5 0 5 10 15 20 25

5.2 OPERATING LIMITS IN HEAT PUMP MODE

65

55

45

35

25

out water te mp (°C)

15

5

out w ate r tem p (°C)

Heat Pump envelope

-5

-20 -10 0 10 20 30 40

Air te mp (°C)

28

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

5 OPERATING LIMITS

5.3 OPERATING LIMITS IN DHW TOTAL HEAT RECOVERY

65

55

45

35

25

TW OUT ACS (°C)

15

5

-5

-15 -10 -5 0 5 10 15 20

5.4 OPERATING LIMITS ONLY IN DHW PRODUCTION

65

TOAL HEAT RECOV ERY enve lop e

TW OUT chiller (°C)

DHW e nve lope

55

45

35

25

DHW out water te mp (°C)

15

5

-5

-20-100 10203040

Air te mp (°C)

5.5 THERMAL CARRIER FLUID

The units belonging to the HWMC series can work with mixtures of water and up to 30% ethylene glycol.

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

29

HWMC

6 CONTROL AND SAFETY DEVICES

All the control and safety devices are set and tested in the factory before
the unit is dispatched.

6.1 CONTROL DEVICES

6.1.1 Service thermostat

The service thermostat activates and deactivates the compressor according
to the demand for chilled water (cooling mode) or heated water (heat pump
mode), as determined by a sensor installed on the water exchanger outlet.
This device is governed by the microprocessor control (see also the manual
regarding the microprocessor).

6.1.2 CONTROL DEVICE SETTINGS

Control devices Set point min max differential

Service thermostat °C 7 5 15 2
(outlet water temp. cooling mode)
Service thermostat °C 45 25 53 2
(outlet water temp. heat pump mode)

6.2 SAFETY DEVICES

6.2.1 HIGH PRESSURE SWITCH

The high pressure switch stops the compressor when the outlet pressure
exceeds the set value.

6.2.2 LOW PRESSURE SWITCH

The low pressure switch stops the compressor when the intake pressure
falls below the set value.

6.2.4 ANTIFREEZE THERMOSTAT

The antifreeze thermostat situated at the evaporator outlet performs a dual
function: it prevents ice from forming in the evaporator in the event of an
excessive decrease in the water flow; it stops the unit in the event of a failure
of the service thermostat.
This device is governed by the microprocessor control (see also the chapter
regarding the microprocessor).

6.2.5 WATER DIFFERENTIAL PRESSURE SWITCH

The water differential pressure switch stops the unit in the event of an
excessive reduction in the water flow, thus protecting it from the formation
of ice (chiller operation) and excessively high condensation temperatures
(heat pump operation).

6.2.6 WATER SAFETY VALVE

The water safety valve opens when the pressure within the water circuit
reaches a level that may cause damage to the unit.

6.2.7 SAFETY DEVICE SETTINGS

Safety device Activation Differential Resetting

Maximum pressure switch (bars) 42 Manual
Minimum pressure switch (bars) 2 Automatic
Antifreeze thermostat (°C) 4 3 Manual
Water differential pressure switch (bars) 0,050 0 Automatic
Water safety valve (bars) 4

6.2.3 ANTI-RECYCLE TIMER

The function of the timer is to prevent excessively frequent compressor
starts and stops. This device is a function included in the microprocessor
control; it prevents the compressor from starting up again after a stop until
a set period of time has elapsed (approximately 5 minutes).

30

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

7 ROUTINE MAINTENANCE AND CHECKS

It is necessary to periodically check the correct functioning of safety devices
(pressure switches and safety valves) and that there are no leaks of refrigerant.
After the initial start-up, periodic checks must be conducted at the intervals
and in the manner prescribed by current national laws and regulations.
To keep the unit in good working order and guarantee the expected levels of
performance and safety, it is necessary to carry out some periodic routine
checks: some may be performed directly by the user while others must be
carried out solely by specialised personnel.

7.1 CHECKS TO BE PERFORMED BY THE USER

The checks and operations described in this section may be easily performed
by the user, provided that the latter shows a minimum of attention.

- Remove any dirt that has built up around the coil or objects trapped in
the mesh protecting the coil itself (leaves, paper etc., to be carried out
monthly).

Warning
coils since the aluminium fins are extremely sharp and can cause cuts.

- Check the level of water in the circuit using the water pressure gauge,
which should indicate a pressure of about 1.5 bars (monthly).

- Check that the escape pipe of the water safety valve is tightly secured.

- Check the water circuit for leaks (monthly).

- If the unit is to remain out of service for a long time, drain the water (or
other fluid present in the circuit) from the pipes and the unit itself.

This is indispensable if during the period of quiescence the ambient

temperature is expected to fall below the freezing point of the fluid used
(seasonal operation).

Drain the unit and parts of the circuit subject to the risk of freezing by

opening the RS emptying tap (optional).

Before placing the unit back in service at the start of the season, refill

the water circuit as directed in section 1.4.

- Check that the noise emissions of the unit are regular (monthly).

- If necessary, release the pump rotor P and S models)

Be especially careful when working in proximity to finned

Come into contact with the dissipator can cause burns.

Warning

component.

Important! After completing maintenance jobs, always replace the panels
enclosing the unit and secure them with the fastening screws provided.

The checks and operations described in this section must be carried out on
a yearly basis by specialised personnel.

- Check the electric control board terminals to ensure that they are securely
tightened: the movable and fixed contacts of the circuit breakers must
be periodically cleaned and replaced whenever they show signs of
deterioration.

- Check the compressor and pipes for oil leaks.

- Check the efficiency of the water differential pressure switch.

- Clean the metal filters mounted in the water pipes.

- Clean the finned coil by aiming a jet of compressed air in a direction
opposite to the outflow of air, taking care not to bend the fins.

Do not perform any voltage insulation test on any

8 RETIRING THE UNIT

When the unit has reached the end of its working life and needs to be removed
and replaced, a series of operations should be carried out:

- the refrigerant gas it contains should be recovered by specialised personnel
and sent to a waste collection facility;

- the lubricating oil in the compressor should also be recovered by specialised
personnel and sent to a waste collection facility;

- if they cannot be reused, the framework and components should be
scrapped and separated according to the type of material: this applies
especially for the considerable quantities of copper, aluminium and steel
present in the unit.

This will make the job of waste collection, disposal and recycling facilities
easier and minimise the environmental impact of the dismantling.

7.2 CHECKS AND MAINTENANCE TO BE PERFORMED BY
SPECIALISED PERSONNEL

WARNINGS

Important! All the operations described in this section MUST ALWAYS BE

PERFORMED BY QUALIFIED PERSONNEL.

Warning

parts, make sure you have disconnected it from the mains electricity supply.

Warning

reach high temperatures. Be especially careful when working in their vicinity.

Warning

coils since the aluminium fins are extremely sharp and can cause cuts.

Warning
without having first disconnected it from the power supply. Wait
another 5 minutes before accessing the internal parts of the unit

Warning

live when it is connected to the mains voltage.

Coming into contact with this voltage is extremely dangerous and
can cause death or serious harm.

Warning

dedicated power line, with calibratable differential switch, separate
from the other power lines of home appliances.

Warning

Before carrying out any work on the unit or accessing inter nal

The upper par t of the compressor casing and the outlet pipe

Be especially careful when working in proximity to finned

Never attempt to access internal parts of the unit

The electrical components of the inverter power unit are

The inverter unit has capacitive leakage current . Set a

The dissipator may be hot when the inverter is running.

Installation and maintenance may be carried out solely by qualified
technicians specifically trained for this type of equipment, in conformity
with current regulations.

On receiving the equipment, check that it has not undergone any damage
during transport.
For installation and use of accessories, please refer to the relative technical
sheets.

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

31

HWMC

9 TECHNICAL FEATURES

9.1 RATED TECHNICAL DATA OF HEAT PUMPS

HWMC 010M 013 018 023 029

Power supply V-ph-Hz 230-1-50 400-3-50 400-3-50 400-3-50 400-3-50

Cooling mode

Cooling capacity

1

Power input 1 kW 3,34 4,37 7,52 7,40 11,50

EER 3,18 3,14 2,46 2,93 2,45

Cooling mode +ACS

Cooling capacity

Power input

1

1

Heating capacity DHW kW 13,00 17,20 25,00 29,70 40,00

Total COP 6,99 7,29 6,29 7,02 6,43

Heating mode (system / DHW)

Heating capacity

Power input

2

2

COP 3,30 3,21 2,86 3,18 2,82

Water flow - chiller mode l/h 1.820 2.362 3.174 4.013 5.080

Water flow - pdc mode l/h 1.973 2.582 3.734 4.447 5.856

DHW water flow (total recovery) l/h 2.263 2.984 4.351 5.170 6.952

Pump head, system side (chiller) kPa 127 157 116 146 120

Expansion tank dm

Pump head, DHW side kPa 97 128 45 107 57

Expansion tank DHW side dm

No. of scroll compressors / circuits 1 / 1 1 / 1 1 / 1 1 / 1 1 / 1

Diameter of water connections inches 1”1/4 1”1/4 1”1/4 1”1/4 1”1/4

Buffer tank dm

Height mm 1250 1250 1250 1300 1300

Length mm 1530 1530 1530 1845 1845

Depth mm 560 560 560 600 600

Sound power level dB(A) 70 71 71 74 74

R410A refrigeration charge (kg) 6,4 8,3 8,3 11,5 11,5

Transport weight* (kg) 220 220 220 300 300

Operating weight* (kg) 240 240 240 347 347

kW 10,60 13,80 18,50 23,40 29,60

kW 10,10 13,50 18,90 23,10 30,40

kW 3,31 4,21 6,98 7,53 11,00

kW 11,40 14,90 21,50 25,60 33,70

kW 3,44 4,34 7,51 8,05 12,00

3

3

3

5 5 5 5 5

1 1 1 1 1

30 30 30 50 50

1 Water temperature 12°C - 7°C; outdoor air temperature 35°C
2 Water temperature 40°C - 45°C, outdoor air temperature 7°C dry bulb, outdoor air temperature 6°C wet bulb

Performances reported in accordance with standard UNI EN 14511
* Weights refer to model with pump and tank

32

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

10 COOLING CIRCUIT DIAGRAMS

Legend

NO. COMPONENT SYMBOL

1 Compressor

2 Evaporator

3 Condenser

4 Thermostatic valve

5 Electric fan

6 Filter

7 Sight glass

8 Solenoid valve

9 High pressure switch

10 Low pressure switch

11 High pressure gauge

12 Low pressure gauge

13 Service connection

14 Differential pressure switch

15 Check valve

16 4-way valve

17 Liquid separator

18 Liquid receiver

19 Pressure transducer

20 Liquid distributor

21 Oil pressure gauge

22 Desuperheater

23 Tap

24 Trap

25 Safety valve

26 Fuse cap

27 Flow switch

28 Throttle valve

29 Electronic expansion valve

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

33

HWMC

10 COOLING CIRCUIT DIAGRAMS

10.1 BASIC COOLING CIRCUIT LAYOUT OF HWMC CHILLING
UNITS WITH ELECTRONIC VALVE

V4

HEAT

PUMP

V1 V2

V5

S2S1

DHW SIDESYSTEM SIDE

V3

S3

34

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

HWMC

10 COOLING CIRCUIT DIAGRAMS

10.2 COOLING CIRCUIT LAYOUT OF HWMC 10 - 29 CHILLING
UNITS WITH ELECTRONIC VALVE

SYSTEM SIDE

DHW SIDE

HWMC ONLY

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

35

HWMC

11 TROUBLESHOOTING

In this section you will find a list of the most common problems that may cause the chiller unit to stop or malfunction. Possible remedies are shown along­side a description of easily identifiable remedies.

Warning

Extreme care should be taken when performing work or repairs on the unit: overconfidence can result in injuries, even serious ones, to in­expert individuals. Operations marked with the letter "U" can be per formed directly by the user, who must carefully follow the instructions provided in this
manual.
Operations marked with the letter "S" may be performed exclusively by specialised personnel.
Once the cause has been identified, you are advised to contact a Galletti service centre or a qualified technician for help.

Who can take

SYMPTOM Cooling Heating

XX S Alarm from Digital Input

X X S Not enabled by remote controls

X

X

A The unit does
not start

XX UAntifreeze Alarm - circuit 1

XX S

X

X

corrective action

U = User

S = specialised

personnel

S

U

Possible control panel

indication

Evaporator Inlet Temp.

Sensor Alarm

Evaporator Inlet Temp.

Sensor Alarm

Probable cause Possible remedy

Faulty connection or contacts open
Wrong voltage

Service thermostat sensor defective
Not enabled by service thermostat

Not enabled by antifreeze
thermostat

Antifreeze sensor defective Check whether it is functioning properly

Check the voltage and close the contacts

Check the efficiency of the water circulation
pump, pressure switch, bleed air from the
circuit; check whether contacts 16 and 30 on
the terminal board are closed

Check and replace if necessary
System at the set temperature, no demand;
check the setting

Check the water temperature
Checking the antifreeze setting

B The compressor
does not start

X X S Tripping of main circuit breaker

X

X

X X S Compressor burnout or seizure Replace the compressor

X X S Compressor contactor deenergized

X X S Power circuit open

XX S Inverter Alarm Motor thermal protection open

X X U S

X

X

S

S

LOW pressure alarm

circuit 1

HIGH Pressure Alarm

circuit 1

User flow alarm
DHW flow alarm

Not enabled by high or low pressure
switch
Compressor defective

Water circulation pump blocked
Defective water circulation pump
Lack of water flow

Check for the presence of short circuits in
the wiring or windings of the pump, fan and
compressor motors or in the transformer.

See items D-E
See item B

Check the voltage at either end of the
compressor contactor coil and verify the
continuity of the coil itself

Locate the cause that tripped the protection;
check for the presence of short circuits in
the wiring or windings of the pump, fan and
compressor motors or in the transformer

The compressor has operated in critical
conditions or there is insufficient refrigerant
within the circuit: check the working conditions
and make sure they fall within the operating
limits.
Refrigerant leak: refer to item G

Release the pump
Check the pump and replace it if necessary
Let water flow

C The compressor
starts up and
stops repeatedly

36

XX S

X X S Compressor contactor defective Check and replace if necessary

X X S Lack of refrigerant See item G

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

LOW Pressure Alarm

triggered by sensor

-circuit 1

Minimum pressure switch has
tripped

See item E

HWMC

11 TROUBLESHOOTING

SYMPTOM Cooling Heating

Who can take

corrective action

U = User

S = specialised

personnel

Possible control panel

indication

Probable cause Possible remedy

D The compressor
does not start
because the ma­ximum pressure
switch has tripped

E The compressor
does not start
because the mi­nimum pressure
switch has tripped

X X S

X X S

X U

X S

X X S

X X S

X X S

X X S

X S

X S

X U

HIGH Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1

LOW Pressure Alarm trig­gered by sensor - circuit 1

LOW Pressure Alarm trig­gered by sensor - circuit 1

LOW Pressure Alarm trig­gered by sensor - circuit 1

LOW Pressure Alarm trig­gered by sensor - circuit 1

LOW Pressure Alarm trig­gered by sensor - circuit 1

Pressure switch failure Check and replace

Excessive refrigerant charge Discharge the excess gas

Finned coil obstructed, insufficient
air flow

Fan not working See item F

Presence of incondensable gas in
the cooling circuit

Refrigerant filter clogged Check and replace

Pressure switch failure Check and replace

Unit completely empty See item G

Finned coil obstructed, insufficient
air flow

Presence of frost on the evapora­ting coil

Evaporator fan not working See item F

Remove dirt from the coil and any obstacles
to air flow.

Recharge the circuit after having drained and
evacuated it

Remove dirt from the coil

See item O

F The fans do not
start

X X S

X X S

X X S

X X S

X X S

X
X

X X S

X X S

X
X

S S

LOW Pressure Alarm trig­gered by sensor - circuit 1

LOW Pressure Alarm trig­gered by sensor - circuit 1

LOW Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1
LOW Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1
LOW Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1
LOW Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1
LOW Pressure Alarm trig­gered by sensor - circuit 1

HIGH Pressure Alarm trig­gered by sensor - circuit 1
LOW Pressure Alarm trig­gered by sensor - circuit 1

Refrigerant filter clogged Check and replace

Expansion valve is not working
properly

Presence of humidity in the cooling
circuit

Fan contactor deenergized

No power output by the fan speed
control card

The fan's internal thermal protection
has tripped

Fan motor defective Check and replace if necessary

Loose electrical connections Check and fasten securely

Check and replace if necessary

Replace the filter and, if necessary, dry out the
circuit and recharge

Check the voltage at either end of the contactor
coil and verify the continuity of the coil itself

Check the contacts and replace if necessary

Check the fan conditions and the air tempera­ture while the unit is running.

All copying, even partial, of this manual is strictly forbiddenRG66008809 - Rev 00

37

HWMC

11 TROUBLESHOOTING

SYMPTOM Cooling Heating

Who can take

corrective action

U = User

S = specialised

personnel

Possible control panel

indication

Probable cause Possible remedy

G Lack of gas X X S

I Frost in liquid
pipe downstream
from a filter

L The unit works
continuously
without ever
stopping

M The unit works
regularly but with
an insufficient
capacity

X X S

X X S Lack of refrigerant gas See item G

X X U

X X S Thermal overload Reduce the thermal load

X X S

X X Liquid filter clogged Replace

X X S Low level of refrigerant See item G

X X S

LOW Pressure Alarm
triggered by sensor -

circuit 1

HIGH Pressure Alarm

triggered by sensor -

circuit 1
LOW Pressure Alarm
triggered by sensor -

circuit 1

Cooling circuit leak

Liquid filter clogged Replace the filter

Wrong setting of operating
thermostat

Compressor does not provide the
rated heating capacity

4-way cycle reversing valve
defective

Check the cooling circuit using a leak detector
after pressurising the circuit to approximately
4 bars. Repair, evacuate and refill.

Check the setting

Check and replace or overhaul

Check the valve power supply and coils and
replace the valve if necessary

N Frost in the
compressor intake
pipe

O The defrosting
cycle is never
activated

P Abnormal
noises detected in
the system

X X S

X S Water circulation pump blocked Release the pump

X X S Water circulation pump defective Check the pump and replace it if necessary

X X S Low level of refrigerant See item G

X X S Liquid filter clogged Replace

X S

X S

X X S The compressor is noisy Check and replace if necessary

X X S The panels vibrate Fasten properly

Expansion valve is not working
properly

4-way cycle reversing valve
defective

The defrost thermostat has broken
down or has been set incorrectly

Check replace

Check the valve power supply and coils and
replace the valve if necessary

Check and replace if defective or change the
setting

38

All copying, even partial, of this manual is strictly forbidden RG66008809 - Rev 00

ISTRUZIONI PER AVVIAMENTO

VS. INSTALLAZIONE

1

Nel manuale d’installazione troverete tutti i suggerimenti per una
perfetta posa delle apparecchiature. Ricordate d’installare il filtro a “Y”
a protezione della scambiatore (obbligatorio).

2

VS. COLLEGAMENTO

Effettuate correttamente tutti gli allacciamnti. Nel Modulo Richiesta
Primo Avviamento troverete una lista di tutte le verifiche prima di
richiederci lo start-up della macchina.

3

VS. RICHIESTA

Con almeno una settimana di anticipo inviate via fax il modulo di
richiesta persente nei documenti della macchina in mancanza di tale
documento fare richiesta alla sede Galletti:

Tel. [phone] - Fax. [phone]
e-mail: [e-mail]

4

NS. APPUNTAMENTO

L’assistenza Galletti organizzerà l’intervento facendovi contattare dal
Centro Assistenza Tecnica Autorizzato di zona.

NS. COLLAUDO

5

Assieme a Vs. personale verranno effettuati tutti i controlli preliminari ed
il collaudo della macchina.
Al Vs. personale verranno date istruzioni per la corretta gestione della
macchina.

6

NS. GARANZIA

A collaudo effettuato il Centro Assistenza Tecnica Autorizzato rilascerà
il certificato di collaudo valido per la garanzia della macchina.

Z

N

I

A

A

R

A

G

I

T

T

G

E

A

L

L

Galletti S.p.A. mette a Vs. disposizione un programma di manutenzione personalizzato.

www.galletti.it

40010 Bentivoglio (BO) - Italy - Via Romagnoli 12/a Tel. [phone] - Fax. [phone]

Company UNI EN ISO 9001 and OHSAS 18001 certified