CLIVET WSAN-XEE Series User manual

Installation use and maintenance manual
WSAN-XEE 82 - 302
Air cooled heat pump for outdoor installation
M6G240F7-05 17-12-2013

2
Dear Customer,
We congratulate you on choosing these product.
Clivet is being working for years to offer systems able to assure the maximum
comfort for long time with high reliability, efficiency , quality and safety. The
target of the company is to offer advanced systems, that assure the best com-
fort, reduce the energy con-sumption, the installation and maintenance costs
for all the life-cycle of the system.
With this manual, we want to give you information that are useful in all the
phases: from the reception, to the installation and use until the disposal so
that a system so advanced offers the best procedure of installation and use.
Best regards and have a nice reading !
CLIVET Spa

3
1
2
3
4
General 4
Reception 7
Positioning 8
Water connections 9
Electrical connections 11
Start-up 16
Regulation 20
Maintenance 27
Technical information 29
Disposal 36
Residual risks 37
5
6
7
8
9
10
11
INDEX
The data contained in this bulletin is not binding and may be changed by the
manufacturer without prior notice.
Reference technical bulletin : BT07F009GB-10

4
1.2 GENERAL INSTRUCTIONS
Preliminaries
The positioning, hydraulic system, refrigerating, electrics and
the channelisation of the air must be determined by the
system designer in accordance with local regulations in force.
Only qualified personnel can operate on the unit, as required
by the regulation in force.
Using the unit in case of breakdown or malfunction :
• voids the warranty
• may compromise the safety of the machine
• may increase time and repair costs.
Follow local safety regulations. .
Keep packing material out of children’s reach it may be
dangerous. .
Recycle and dispose of packing material in conformity with
local regulations. .
Risk situations
The unit has been designed and created to prevent injures to
people.
During designing it is not possible to plane and operate on all
risk situation.
Read carefully "Residual risk" section where all situation
which may cause damages to things and injuries to people
are reported.
Installation, starting, maintenance and repair required specific
knowledge; if they are carried out by inexperienced personnel,
they may cause damages to things and injuries people.
Intended use
Use the unit for cooling/heating water or a water and glycol
mix for air-conditioning only, within limits defined in the
technical bulletin and on this manual..
Any use other than intended does not involve the
manufacturer in any commitment or obligation. .
Installation
Verify that the electrical line characteristics are in compliance
with data quotes on the unit serial number label.
Maitenance
Plan periodic inspection and maintenance in order to avoid or
reduce repairing costs.
Turn the machine off before any operation.
Modification
All unit modifications will end the warranty coverage and the
manufacturer responsibility. .
Breakdown/Malfuction
Disable the unit immediately in case of breakdown or
malfunction. .
Contact a constructor certified assistance service.
Use original spares parts only.
User training
The installer has to train the user on :
• start-up / shutdown;
• set points change;
• standby mode;
• maintenance;
• what to do / what not to do in case of breakdown.
Data update
Continual product improvements may imply manual data
changes .
Visit manufacturer web site for updated data.
Keep this manual with the wiring diagram in an accessible
place for the operator.
Note the unit lable data so you can provide them at the assi-
stance centre in case of intervention (see "Unit identification"
section).
Provide a machine notebook that allows any interventions
carried out on the machine to be noted and tracked making it
easier to suitably note the various interventions and aids the
search for any breakdowns.
In case of breakdown or malfunction:
• immediately deactivate the unit .
• contact a assistance service centre authorized by the
manifacturer.
• use original spares parts only
Ask the installer to format on:
• start-up / shutdown;
• set points change;
• standby mode;
• maintenance;
• what to do / what not to do in case of breakdown.
1.3 INDICATIONS FOR THE USER
The manual provides correct unit installation, use and
maintenance.
Pay particolar attention to:
Warning identifies particularly important operations or
information .
Prohibited operations that must not be carried out, that
compromise the operating of the equipment or may cause
damage to persons or things.
• It is advisable to read it carefully so you will save time
during operations.
• Follow the written indications so you will not cause
damages to things and injuries people. The preliminary
information must be read prior to carrying out any of the
following operations.
1.1 MANUAL
1 - GENERAL

5
1.4 UNIT INDENTIFICATION
Serial number label
The serial number label is positioned on the unit and allows to
indentify all the unit features.
It has not to be removed for any reason.
It reports the regulations indications such as:
• machine type, exmple:
Series WSAN-XEE
Size 82
• serial number
12 characters Axxxxxxxxxxx
• year of manufacture
• wiring diagram number
• electrical data
• manufacturer logo and address .
Serial number
It identifies uniquely each machine.
It identifies specific spare parts for the machine.
Assistance request
Note data from the serial number label and write them in the
chart on side, so you will find them easily when needed.
In case of intervention you have to provide data.
Serie
Size
Serial number
Year of manufacture
Wiring diagram
1.5 PRINCIPLE OF OPERATION
1 - GENERAL
2
1a
3
4
5
61b
2
1a
3
45
6
71b
SUMMER: the cooling cycle allows the transfer of excess
indoor heat to the external environment.
1. The compressor compresses the refrigerant gas, placing it
at high pressure and high temperature.
2. In the external coil, the refrigerant is cooled, and the heat
is released into the environment by means of the fan. This
is why the coil needs to be kept clean and free of obsta-
cles.
3. When it cools, the refrigerant becomes liquid.
4. The expansion valve causes a sudden drop in the pres-
sure of the refrigerant, which becomes very cold as its
volume increases.
5. In the exchanger, the refrigerant evaporates and absorbs
the heat from the water that returns to the system, cooling
it.
WINTER : the cooling cycle makes it possible to absorb energy
(heat at low temperature) from the external environment and to
transfer it to the area to be heated.
1. The compressor compresses the refrigerant fluid, placing it
at high pressure and high temperature.
2. The 4-way valve reverses the flow with respect to respect to
SUMMER operation.
3. In the plate exchanger, the water that returns to the system
absorbs heat from the refrigerant.
4. As it cools, the refrigerant condenses and becomes liquid.
5. The expansion valve causes a sudden drop in the pressure
of the refrigerant, which becomes very cold as its volume
increases.
6. In the external coil, the cold refrigerant evaporates and ab-
sorbs heat from the external air. In this phase, as the coil
cools, it may freeze. This is why the cycle is automatically
reversed periodically for a short time so as to defrost it

6
1.6 ACCESSORIES
VERSIONS OPTIONS
D Partial energy recovery
B Water low temperature
CONFIGURATIONS
DSPB Double set point for water low temperature
REFRIGERANT CIRCUIT
CCCA Copper / aluminium condenser coil with acrylic lining
CCCA1 Copper / aluminium condenser coil with Fin Guard
treatment (Silver)
MHP High and low pressure gauges
MHPX High and low pressure gauges
OHP Operation in heat pump
OHO Heat-only function
HYDRAULIC CIRCUIT
-Hydronic group utility side: not required
1PUS Standard pump
1PUR Single-pump with reduced available head
1PUM Single-pump with larger available head
2PUS Standard double pump
2PUR Double pump with reduced available head
2PUM Double pump with larger available head
IFWX Water steel mesh strainer
ACC1 Teflon steel storage device
SYSTEM ADMINISTRATORS
CMMBX Serial communication module to supervisor
(MODBUS)
CMSC9 Serial communication module to Modbus supervisor
CMSC7 Modbus/LON WORKS serial converter kit
ELECTRIC CIRCUIT
RCMRX Remote control via microprocessor control
PCDWX Daily and weekly programming clock
PM Phase monitor
PMX Phase monitor
SFSTR4N Disposal for inrush current reduction, for unit
400/3/50+N
PFCP Power factor correction capacitors (cosfi > 0.9)
CLSE Free contacts for alarm
SCP3X Set point compensation according to the outside en
thalpy
INSTALLATION
AMRX Rubber antivibration mounts
PGCEX Coil protection grilles external air side
X= Accessory separately supplied
1 - GENERAL

7
Operate in compliance with safety regulations in force .
For detailed information (dimensions, weight, technical cha-
racteristics etc.) please refer to the “Technical information”
section.
Use single protection devices : gloves, glasses ecc. .
2.1 PRELIMINARY INFORMATION
2.2 DELIVERY CONTROL
2.3 STORING
Use protection to avoid the unit damaging .
A
B
2- RECEPTION
Be careful not to damage the unit.
Recycle and dispose of packing material in conformity with
local regulations.
Observe external packing instructions .
2.4 HANDLING
Verify unit weight and handling equipment lifting capacity .
Identify critical points during handling (disconnected routes,
flights, steps, doors).
Before handling verify that the unit keeps its balance.
2.5 PACKING REMOVING
Before accepting the delivery you have to check:
• That the unit hasn’t been damaged during transport.
• Check that the materials delivered correspond with that
indicated on the transport document comparing the data
with the identification label ‘A’ positioned on the packa-
ging.
In case of damage or anomaly:
• Write down on the transport document the damage
you found and quote this sentence: "Conditional
acceptance — clear evidence of deficiencies/
damages during transport".
• Contact supplier and the carrier by fax and registered
mail with advice of receipt.
Any disputes must be made within the 8 days following the
delivery. Complaints after this period are invalid..
1
2
1 safety rods
2 pins

8
Operate in compliance with safety regulations in force.
For detailed information (dimensions, weight, technical
characteristics etc.) please refer to the TECHNICAL
INFORMATION section.
Use single protection devices : gloves, glasses ecc.
During positioning consider these elements :
• technical spaces required for the machine and system
• place where the machine will be installed
• electrical connections
• water connections
• air / aeraulic ducts
Do not considerer these elements could decrease
performances and operational life of the unit.
3.1 PRELIMINARY INFORMATION Protect the unit with an appropriate fencing to avoid the
access to a not authorized personnel (babies, vandals etc.)
A correct circulation of the air is indispensible to guarantee the
good working order of the machine.
Avoid therefore:
• obstacles to the airflow;
• exchange difficulties;
• leaves or other foreign bodies that can obstruct the
exchange batteries;
• winds that hinder or favour the airflow;
• heat or pollution sources close to the unit (chimneys,
extractors etc);
• stratification (cold air that stagnates at the bottom);
• recirculation (expelled air that is sucked in again);
• positioning below the level of the threshold, close to very
high walls, attics or in angles that could give rise to
stratification or recirculation phenomenons.
Ignoring the previous indications could:
• energy efficiency decrease;
• blocks due to HIGH PRESSURE (in summer) or LOW
PRESSURE (in winter).
3.2 FUNCTIONAL SPACES
3.3 POSITIONING
Functional spaces are designed to:
• guarantee good unit operation
• carry out maintenance operations
• protect authorized operators and exposed people
Respect all functional spaces indicated in the TECHNICAL
INFORMATION section.
Double all functional spaces if two or more unit are aligned.
Units are designed to be installed:
• EXTERNAL
• in fixed positions
Limit vibration transmission:
• use antivibration devices on unit bearing points
• install flexible joints on the hydraulic connections
Choose the installation place according to the following
criteria:
• Customer approval
• safe accessible position
• technical spaces requested by the unit
• spaces for the air intake/exhaust
• avoid flood-prone places
• verify unit weight and bearing point capacity
• verify that all bearing points are aligned and leveled
• install the unit raised from the ground
• max. distance allowed by the electrical connections
Prefer places where the unit doesn’t disturb the neighbours.
Avoid installations next to bedrooms or windows.
Avoid snow accumulations on batteries.
3 - POSITIONING
3.4 CONDENSATE WATER
When a heat pump is running it produces a considerable
amount of water due to the defrosting cycles of the external
coil.
The condensation must be eliminated in a manner to avoid
wetting pedestrian areas.
With extensive very cold outdoor temperatures, condensation
could freeze and block the flow, causing a slow build-up of
ice; therefore special attention must be paid to eliminating
condensation, raising the unit off the ground and evaluating
whether antifreeze elements should be installed
3.5 FRESH AIR PROBE - OPTIONAL
A
B
C
NORD
The external probe allows to automatically change the unit set
point according to the external enthalpy (temperature +
humidity).
It is then possible to optimize the unit energy efficiency.
POSITIONING
The sensor should not be influenced by factors that can
distort the reading (eg direct sunlight, air exhausted from the
fan or other sources, contact with the unit structure or other
heat sources, accumulations of snow / ice).
Examples to position the external probe :
• A roof
• B under a terrace
• C if at free wall provide a
small roofing

9
4.1 PRELIMINARY INFORMATION
CUT-OFF VALVES
• Installed at inlet and outlet (both on the water technique
circuit as well as that of the hot domestic water) allow
maintenance operations without having to empty the
system .
THERMOMETERS AND MANOMETERS
• Installed at entry and exit of the main elements facilitate
inspection and maintenance.
AIR BLEED VALVE
• Installed in all of the highest points of the system allowing
the venting of the circuits air..
DRAINAGE TAPS
• Installed in the lowest points of the system to allow
bleeding.
EXPANSION TANK
• It keeps a correct system pressure when the water
temperature changes. It must be dimensioned as a
function of water plant volume and temperature.
WATER FILTER
• If not present on-board the machine, must be installed
immediately in the water input of the unit, in a position that
is easily accessible for cleaning.
• The filter never should be removed, this operation
invalidates the guaranty
SUPPORTS
• The hydraulic pipes weight mustn’t burden on the unit
connections ..
FLOW SWITCH
• The flow switch must be present as a component of the
system
4.3 OPERATION SEQUENCE
4.4 WATER QUALITY
The water quality is determined by the following factors, avoid
therefore:
• Inorganic salts
• pH
• Biological load (seaweeds etc)
• Suspended solids
• Dissolved oxygen
Water with inadequate characteristics can cause:
• pressure drop increase
• energy efficiency decrease
• corrosive symptom increase
If the unit or the relative water connections can be subject to
temperatures close to 0°C adopt measures for prevent risk of
freeze.
For example:
• Mix water with ethylene glycol
• Safeguard the pipes with heating cables placed under the
insulation
• Empty the system in cases of long non-use and check that:
• there are no closed taps present that could trap water
even after emptying
• there are no low points in which water can stagnate
even after emptying; carry out any blowing required .
4.5 RISK OF FREEZE
4.6 ANTI-FREEZE SOLUTION
Consider that the use of anti-freeze solution determines an
increase in a pressure drop.
Make sure that the glycol type utilized is inhibited (not
corrosive) and compatible with the hydraulic circuit
components (pump etc).
Do not use different glicol mixture (i.e. ethylene with
propylene)
Selection and installation of system components must be
carry out by installer.
Following you will find some indications to integrate with what
is provided by the local regulations in force and by the good
technical laws.
4.2 COMPONENTS
4 - WATER CONNECTIONS
4.7 WATER CONNECTIONS
• Take away the supplied connection union by acting on the
connection joint.
• Weld the union to the installation pipe.
• Perform the connection between the installation pipe and
the evaporator, using the joint.
Do not weld the system pipe with the connection joint atta-
ched.
The rubber gasket might be irreparably damaged.
1. Carefully wash the system with clean water: fill and drain
the system several times.
2. Apply additives to prevent corrosion, fouling, formation of
mud and algae.
3. Fill the plant
4. Execute leakage test.
5. Isolate the pipes to avoid heat dispersions and formation
of condensate.
6. Leave various point of service free (wells, vent-holes etc).
Neglecting the washing will lead to several filter cleaning
interventions and at worst cases can cause damages to the
exchangers and the other parts.

10
4.7 RECOMMENDED CONNECTION
4 - WATER CONNECTIONS
P
9
11
14
8
F
2
3
5
12
7
6
4
8
1
10
13
P
7
The unit is equipped with outlets for the pump emptying and
storage.
Outlets are accessible from the rear side (left side in the fig-
ure).
Storage content :
size 82¸122 80 litres
size 162¸302 130litres (optional)
4.8 WATER CIRCUIT EMPTYING
4.9 RECOVERY EXCHANGER
1. Charged system pressure
switch
2. vent
3. pump
4. expansion tank
5. safety valve
6. flow switch
7. pressure switch/thermometer
8. filter
9. filling valve
10. antivibration joints
11. user side exchanger
12. Differential pressure switch
13. Discharge cock
14. inertial storage tank
STANDARD HYDRAULIC CIRCUIT
• water side safety valve
• impurity trap with filter
• centrifugal pump
• antifreeze heater protection to pumping station
• drain valve
OPTIONAL - The unit can be equipped with exchangers to
recover the partial condensation heat.
The customer is responsible for the management of the
circulation pump, valves, thermostats, etc
The recovery input water must not be below 25°C, in the
event that, wrongful operations and breakages of the unit can
occur .
Water connections must be performed carefully as for the
evaporator (filter, circuit washing, etc) .
Perform all necessary interventions to avoid the RISK OF
FREEZING (tubes insulation, emptying of circuit, addition of
glycol, anti-freeze heaters) .
Water temperature can reach high temperatures (up to 100°
C), therefore:
• avoid the RISK OF BURNS by adopting the necessary
precautions (insulation of tubes, temperature detecting
station on water if the sanitary use is foreseen, etc)
• Install safety valves and specifically dimensioned
expansion tanks in the hydraulic circuit.

11
The characteristics of the electrical lines must be determined
by specialized personnel able to design electrical installations;
moreover, the lines must be in conformity with regulations in
force.
The protection devices of the unit power line must be able to
stop the presumed short circuit current, whose value must be
determined in function of system features.
The power cables and the protection cable section must be
defined in accordance with the characteristics of the
protections adopted. All electrical operations should be
performed by trained personnel having the necessary
requirements by the regulations in force and being informed
about the risks relevant to these activities.
Operate in compliance with safety regulations in force .
5.1 PRELIMINARY INFORMATION
5.5 ELECTRIC LINES INLET
F.L.A. full load ampere
Full load current at max admissible conditions
F.L.I. Full load input
Full load power input
( at max. admissible condition )
serial
number
label VOLTAGE
FLA (A)
FLI (kW)
The serial number label reports the unit specific electrical
data, included any electrical accessories .
The electrical data indicated in the technical bulletin and in the
manual refer to the standard unit, accessories excluded.
Refer to the electrical data report on the serial number label.
5.2 ELECTRICAL DATA
5.3 CONNECTIONS
1. refer to the unit electrical diagram (the number of the
diagram is shown on the serial number label)
2. verify that the network has characteristics conforming to
the data shown on the serial number label
3. Before starting work, verify that the sectioning device at
the start of the unit power line is open, blocked and equip-
ped with cartel warning
4. Primarily you have to realize the earthing connection
5. Shelter the cables using adequate measure fairleads
6. Before power the unit, make sure that all the protections
that were removed during the electrical connection work
have been restored.
5.4 SIGNALS / DATA LINES
Do not overpass the maximum power allowed, which varies,
according to the type of signal.
Lay the cables far from power cables or cables having a
different tension and that are able to emit electromagnetic
disturbances.
Do not lay the cable near devices which can generate
electromagnetic interferences.
Do not lay the cables parallel to other cables; cable crossings
are possible, only if laid at 90°.
Connect the screen to the ground, only if there aren’t
disturbances
Guarantee the continuity of the screen during the entire
extension of the cable.
Respect impendency, capacity and attenuation indications.
5 - ELECTRICAL CONNECTIONS
Fix the cables: if vacated may be subject to tearing.
The cable don't have to touch the compressor and the
refrigerant piping ( they reach high temparatures ).

12
5.6 ELECTRICAL PANEL
5 - ELECTRICAL CONNECTIONS
AP1 Main control module
AP2 Local keyboard
AP3 Expansion module
AP5 RS 485 module
AP11-12 Soft starter
QM1-2 Compressor motor overload cutout
QM3-4 Overload cutout switch pump
KM1-2 Compressor contactor
KM3-4 Pump contactor
QS1 main isolator switch
162 - 302
82 - 122

13
5 - ELECTRICAL CONNECTIONS
5.7 CUSTOMER CONNECTIONS
BT6 outside air temperature probe
SQ1 flow switch
SA1 remote ON-OFF selector
SA2 remote summer-winter selector
SA3 remote 2nd setpoint selector
HL1 shut-down unit signal
HL2 operating unit signal
H% humodity control probe
AP7 remote keyboard

14
5 - ELECTRICAL CONNECTIONS
It optimizes the energetic efficiency of the unit by automatically changing the set-point according to an external signal of 4-20 ma type.
It requests the expansion plug-in module option that must be fitted by the client (refer to the kit instructions) and enabled by
parameter 140 = 1. This function must be enabled with parameter18 (=0 not enabled, =1 only summer, = 2 only winter, = 3 summer
and winter)
par description meaning value
18 WaterReset Water Reset enabling 0=No 1=Cool 2=Heat 3=Always 0
19 MaxCWRH Max. value of the Winter WR correction 10
20 SWRMAXH Corresponding signal of the winter MAX. correction 4
21 SWRMinH Corresponding signal of the winter MIN. correction 20
22 MaxCWRC Summer correction max. value 8
23 SWRMaxC Corresponding signal of the summer MAX. correction 20
24 SWRMinC Corresponding signal of the summer MIN. correction 4
140 PlugInEn Enables PLUG-IN presence . 1=YES / 0=NO
SET POINT CURVE IN COOLING SET POINT CURVE IN HEATING
m
A
P 23
P 24
COMP.
MAX
= P22
COMP.
=0
SET POINT
m
A
P 21
P 20
COMP.
MAX
= P19
COMP.
= 0
SET POINT
Optimises unit energy efficiency by automatically adjusting the set-point according to enthalpy or the external temperature. Requires
the external humidity probe or the external temperature probe, which are optional for certain types of units and must be installed
by the customer and enabled by parameters 152=1 and 156=1.
par description meaning value
9 CompExt
External temp. comp. enabling 0=No 1=Cool 2=Heat 3=Always 0
10 CextMaxC
Ext. Temp. max. summer correction 15
11 CextMinC
Ext. Temp. min. summer correction 30
12 CextMaxH
Ext. Temp. max. winter correction 15
13 CextMinH
Ext. Temp. min. winter correction 0
14 MaxCExtC
Summer correction max. value 8
15 MaxCExtH
Winter correction max. value 10
16 HExtMinC
Ext. enthalpy min. correction 10,5
17 HExtMaxC
Ext. enthalpy max. correction 13,5
152 TextEn EXT. Air probe presence 1=YES, 0=NO
156 URProbeExt Enables external UR% probe. 1=YES, 0=NO
SET POINT CURVE IN COOLING SET POINT CURVE IN HEATING
T EXT
P 11
P 10
COMP.
MAX
= P14
COMP.=0
SET POINT
P 17 P 16
T EXT
P 12
P 13
COMP.
MAX
= P15
COMP.
= 0
SET POINT
5.8 SET POINT COMPENSATION WITH 4-20 MA SIGNAL (WATER RESET)
5.9 SET POINT COMPENSATION ON THE TEMPERATURE OR EXTERNAL ENTHALPY

15
5 - ELECTRICAL CONNECTIONS
5.10 RS485
Make the termination if the unit is the last of the network .
termination yes = dip ON
Sistema di supervisione
12 V AC
CN1 CN1
1918 20 21 2018 19 21
RS-485
RS-232
gnd
-
+
Supervisore
TTL /
RS485
+
-
ALLE ALTRE
UNITA’
12 V AC
gnd
TTL /
RS485
-
gnd
+
OK
NO !
TYPE OF NETWORK
The serial lines must be connected in bus typology, i.e. nodes
to more points are not admitted
SHIELD
• It must be connected to a ground without disturbances
• Connected to round in only one point
• Provide to the shield continuity during all the serial cable
extension.
NETWORK CABLE FEATURES
Couple of conductors twisted and shielded
Section of conductor 0.22mm2…0,35mm2
Nominal capacity between conductors < 50 pF/m
nominal impedance 120 Ω
Recommended cable BELDEN 3105A

16
6 - START-UP
PRELIMINARY CHECKS
To check before starting-up the unit .
For details refer to the different manual sections.
√Preliminary checks - Unit OFF power supply
Access in safety
Functional clearances
Air flow : free return and supply (no bypass, no stratification)
Structure integrity
Fans run freely
Unit on vibration isolators
Unit input water filter + shut-off valves for cleaning
Vibration isolators on water connections
Expansion tank (indicative volume = 5% system content)
Cleaned system
Loaded system + possibile glicole solution + corrosion inhibitor
Under pressure system
Vented system
Refrigerant circuit visual check
Earthing connection
Power supply features
Electrical connections provided by the customer
Outside air temperature probe

17
6 - START-UP
START-UP SEQUENCE
√Start-up sequence - Unit ON power supply
Compressor carter resistances operating at least since 8 hours
Off-load voltage measure
Phase sequence check
Pump manual start-up and flow check
Unit ON
Load voltage measure and absorptions
Liquid light check (no bubbles)
Check of all fan operating
Measure of return and supply water temperature
Super-heating and sub-cooling measure
Check no anomalous vibrations are present
Set-point personalization
Climatic curve personalization
Complete and available unit documentation
Operations to perform to start-up the unit.
For details refer to the different manual sections.

18
Weight of glycol (%) 10 20 30 40
Freezing temperature (°C) -4 -9 -15 -23
Safety temperature (°C) -1 -4 -10 -19
6.1 PRELIMINARY INFORMATION
The indicated operations should be done by qualified
technician with specific training on the product.
Upon request, the service centres performing the start-up; the
electrical, water connections and the other system works are
by the installer.
Agree upon in advance the star-up data with the service
centre.
Verify that the unit is connected to the ground plant
Check the conductors tightening: the vibrations caused by
handling and transport might cause loosing
Feed the unit by closing the sectioning device, but leave it on
OFF.
Check the tension and line frequency values which must be
within the limits :
400/3/50 +/- 10%
Control the unbalancing of the phases:
it must be lower than 2%
Example:
6.2 PRELIMINARY CHECKS
6.3 REFRIGERANT CIRCUIT
6.4 HYDRAULIC CIRCUIT
6.5 ELECTRICAL CIRCUIT
Before checking, please verify the following :
• the unit should be installed properly and in conformity with
this manual.
• the electrical power supply line should be sectioned at the
beginning.
• The line sectionalizing device is open, locked and
equipped with the suitable warning
• make sure no tension is present
1. Check carefully the refrigerating circuit: the presence of oil
stains can mean leakage caused by transportation,
movements or other).
2. Verify that the refrigerating circuit is in pressure: Using the
unit manometers , if present, or service manometers.
3. Make sure that all the service outlets are closed with
proper caps; if caps are not present a leak of refrigerant
can be possible.
1. Before realizing the unit connection make sure that the
hydraulic system has been cleaned up and the clearing
water has been drained
2. Check that the water circuit has been filled and
pressurized
3. Check that the shut-off valves in the circuit are in the
"OPEN" position.
4. Check that there isn’t air in the circuit, if required,
evacuate it using the air bleed valve placed in the system
high points.
5. When using antifreeze solutions, make sure the glycol
percentage is suitable for the type of use envisaged.
6 - START-UP
The working out of the limits can cause irreversible damages
and voids the warranty.
6.6 COMPRESSOR CRANKCASE RESISTANCES
Connect the oil resistances on the compressor crankcase at
least 8 hours before the compressor is to be starter :
• at the first unit start-up
• after each prolonged period of inactivity
1. Supply the resistances switching off the unit isolator
switch.
2. To make sure that hte resistances are working, check the
power input .
3. At start-up the compressor crank-case temperature on the
lower side must be higher at least of 10°C than the outside
temperature.
Do not start the compressor with the crankcase oil below
operating temperature.
L1 L2 L3
388 V
379 V
377 V
388 + 379 + 377
3=381
388 (max) – 381 = 7
7
381 x 100 = 1,83 OK
1)
2)
3)

19
Check that the air and water temperatures are included in the
working limits
For information on the control system, refer to the paragraph
CONTROL.
Start the unit
With unit of full load, namely in stable conditions and close to
those of work, check :
• Power supply tension
• Total absorption of the unit
• Absorption of the single electric loads
6.6 TENSIONS
6.8 STARTING REPORT
Realize the operating objective conditions is useful for check
the unit over time.
With unit of full load, namely in stable conditions and close to
those of work, take the following data:
• Tension and general absorptions with unit at full load
• Absorption of varied electrical loads (compressors, fans,
pumps etc)
• Temperatures and capacities of different liquid (water, air)
in the inlet and outlet of the unit
• Temperatures and pressures on the refrigerant circuit
characteristic points (compressor discharge, liquid, intake)
The remarks should be preserved and available during
maintenance .
97/23 CE PED DIRECTIVE gives instructions for installers,
users and maintenance technicians as well.
Refer to local actuation norms; briefly and as an example, see
the following
• Compulsory verification of the first installation :
only for units assembled on the installer’s building site
(for ex. Condensing circuit + direct expansion unit)
• Certification of setting in service :
for all the units
• Periodical verifications:
to be executed with the frequency indicated by the
manufacturer (see the maintenance section)
6.9 CE 97/23 PED DIRECTIVE
• Check that the remote commands (ON-OFF, etc.) are
connected and if necessary enabled with the relevant
parameters as described in ELECTRICAL
CONNECTIONS section
• Check that probes or optional components are connect
and enable with the relative parameters( ELECTRICAL
CONNECTION section)
6.7 REMOTE CONSENT
6 - START-UP

20
7 - CONTROL
7.1 MULTI-FUNCTION KEYPAD
The HEATING mode functions are active only on HEAT PUMP unit version .
In ONLY COOL units, the relative parameters are VISIBLE but NOT ACTIVE , for example the
winter setpoint.
ALARM STATUS
SET
ON – OFF
Unit can be switched on and off by:
• remote or service keypad
• remote switch (see ELECTRICAL CONNECTIONS paragraph)
• Supervisor
COOLING The compressor is activated with outlet temperature higher than set point
To switch from cooling to heating and vice versa, proceed as follows:
• Turn the unit OFF
• Wait until the plant water temperature (and external air) fall within the operating limits.
They can be switched over from the remote controls (refer to the ELECTRIC WIRING paragraph).
HEATING The compressor is activated with outlet temperature lower than set point
ECO A secondary set-point can be used, with respect to the comfort setting. In heating the ECO-set is lower
than the standard set , in cooling the ECO-set is higher than the standard set.
MAINTENANCE the plant can be kept within the operating limits even when the unit is OFF or on STANDBY
DEFROSTING The external coil is free from ice stopping the fans and forcing for a short period the unit in cooling
OPERING MODES
THERMOREGULATION
The thermoregulation is based on the OUTLET temperature.
The unit is dimensioned for a determined TOTAL HEAD between input and output water temperature.
Usually the project step is 5°C; if the value is different, it is necessary reset parameters 37 and 38 (accessible to the service centre).
In function of the total head, the installation determines the head quote that every resource (compressor, heating elements) is able to
provide: the STEP HEAD.
The control logic insert gradually the resources when the outlet temperature is higher than the set point + the head step.
The resources are activated one at a time and only at the SCAN TIME expiring.
The scan time is not fixed but it changes in function of the margin between the water outlet temperature and the Set point value. Hi-
gher is the margin value (both in positive and in negative) shorter will be the space among the scan points.
The scan time value is visualized at status 4; when the status 3 has reached the status 4 value, the compressor operating request is
activated.
What above described, refer to the COOLING operating; in HEATING le logic is the same but “overturned” ( insertion of the compres-
sor for outlet temperature< set-point –step jump )
OUTLET temperature
head step
ACTUAL set point
OUTLET temperature SURVEY,
at SCAN TIME expiring
time
VARIABLE scan time