CLIVET CSNX-XHE2 12.2-44.4 User manual

M07X40A16-00 22-03-16
CSNX-XHE2 12.2-44.4
Installation and
operating manual
“Roof Top” air cooled heat pump for crowded room

Dear Customer,
We congratulate you on choosing this product
For many years Clivet has been oering systems that provide maximum comfort, together with high
reliability, eciency, quality and safety.
The aim of the company is to oer advanced systems, that assure the best comfort, reduce energy
consumption and the installation and maintenance cost for the life cycle of the system.
The purpose of this manual is to provide you with information that is useful from reception of
the equipment, through installation, operational usage and nally disposal so that this advanced
system oers the beat solution.
Yours faithfully.
CLIVET Spa
The data contained in this manual is not binding and may be changed by the manufacturer without
prior notice.
Reproduction, even is part, is FORBIDDEN © Copyright - CLIVET S.p.A. - Feltre (BL) - Italia

M07X40A16-00 CSNX-XHE2 12.2-44.4 3
Index of contents
1 General description 4
2 Reception 6
3 Positioning 8
4 Water connections 10
5 Aeraulic connections 11
6 Electrical connections 12
7 Start-up 16
8 Control 22
9 Maintenance 28
10 Accessories 33
11 Decommissioning 40
12 Residual risks 41
13 Technical information 42
14 Dimensional drawings 45

4 CSNX-XHE2 12.2-44.4 M07X40A16-00
1 General description
1.1 Manual
The manual provides correct unit installation, use and maintenance.
Pay particular attention to:
Warning, identies particularly important operations or information.
Prohibited operations that must not be carried out, that compromise the operating of the unit or may cause damage to persons or things.
t It is advisable to read it carefully so you will save time during operations.
t Follow the written indications so you will not cause damages to things and injuries people.
1.2 Preliminaries
Only qualied personnel can operate on the unit, as required by the regulation in force.
1.3 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 specic knowledge; if they are carried out by inexperienced personnel, they may cause
damages to things and injuries people.
1.4 Intended use
Use the unit only:
t civil air-conditioning
t keep to the limits foreseen in the technical schedule and in this manual
The manufacturer accepts no responsibility if the equipment is used for any purpose other than the intended use.
1.5 Installation
Outdoor installation
The positioning, hydraulic system, refrigerating, electrics and the ducting of the air must be determined by the system designer in accordance
with local regulations in force.
Follow local safety regulations.
Verify that the electrical line characteristics are in compliance with data quotes on the unit serial number label.
1.6 Maintenance
Plan periodic inspection and maintenance in order to avoid or reduce repairing costs.
Turn the unit o before any operation.
1.7 Modication
All unit modications will end the warranty coverage and the manufacturer responsibility.
1.8 Breakdown/Malfuction
Disable the unit immediately in case of breakdown or malfunction.
Contact a certied service agent.
Use original spares parts only.
Using the unit in case of breakdown or malfunction:
t voids the warranty
t it may compromise the safety of the unit
t may increase time and repair costs

M07X40A16-00 CSNX-XHE2 12.2-44.4 5
1.9 User training
The installer has to train the user on:
t Start-up/shutdown
t Set points change
t Standby mode
t Maintenance
t What to do / what not to do in case of breakdown
1.10 Data update
Continual product improvements may imply manual data changes.
Visit manufacturer web site for updated data.
1.11 Indications for the User
Keep this manual with the wiring diagram in an accessible place for the operator.
Note the unit data label so you can provide them to the assistance centre in case of intervention (see “Unit identication” section).
Provide a unit notebook that allows any interventions carried out on the unit 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:
t Immediately deactivate the unit
t Contact a service centre authorized by the manufacturer
The installer must train the user, particularly on:
t Start-up/shutdown
t Set points change
t Standby mode
t Maintenance
t What to do / what not to do in case of breakdown
1.12 Unit indentication
The serial number label is positioned on the unit and allows to indentify all the unit features.
The matriculation plate must never be removed.
The matriculation plate shows the indications foreseen by the standards, in particular:
t unit type
t serial number (12 characters)
t year of manufacture
t wiring diagram number
t electrical data
t manufacturer logo and address
1.13 Serial number
It identies uniquely each unit.
Must be quoted when ordering spare parts.
1.14 Assistance request
Note data from the serial number label and write them in the chart on side, so you will nd them easily when needed.
Series
Size
Serial number
Year of manufacture
Electrical wiringdiagram

6 CSNX-XHE2 12.2-44.4 M07X40A16-00
2 Reception
You have to check before accepting the delivery:
t That the unit hasn’t been damaged during transport
t That the materials delivered correspond with that indicated on the transport document comparing the data with the identication label
positioned on the packaging.
In case of damage or anomaly:
t Write down on the transport document the damage you found and quote this sentence: “Conditional acceptance clear evidence of
deciencies/damages during transport”
t Contact by fax and registered mail with advice of receipt to supplier and the carrier.
Any disputes must be made within 8 days from the date of the delivery. Complaints after this period are invalid.
2.1 Storage
Observe external packaging instructions.
2.2 Handling
1. Verify unit weight and handling equipment lifting capacity.
2. Identify critical points during handling (disconnected routes, ights, steps, doors).
3. Suitably protect the unit to prevent damage.
4. lifting brackets
5. Lifting with balance
6. Lifting with spacer bar
7. Align the barycenter to the lifting point
8. Use all the lifting brackets (see the dimensional section)
9. Gradually bring the lifting belts under tension, making sure they are positioned correctly.
10. Before starting the handling, make sure that the unit is stable.

M07X40A16-00 CSNX-XHE2 12.2-44.4 7
2.3 Packaging removing
Be careful not to damage the unit.
Keep packing material out of children’s reach it may be dangerous.
Recycle and dispose of the packaging material in conformity with local regulations.
A
B
A Supports for handling: remove after the handling.
B Remove the coil protective mesh before the start-up

8 CSNX-XHE2 12.2-44.4 M07X40A16-00
3 Positioning
During positioning consider these elements:
t Technical spaces requested by the unit
t Electrical connections
t Water connections
t Spaces for air exhaust and intake
3.1 Functional spaces
Functional spaces are designed to:
t guarantee good unit operation
t carry out maintenance operations
t protect authorized operators and exposed people
Respect all functional spaces indicated in the DIMENSIONS section.
Double all functional spaces if two or more unit are aligned.
3.2 Saftey valve gas side
The installer is responsible for evaluating the opportunity of installing drain tubes, in conformity with the local regulations in force (EN 378).
3.3 Positioning
Units are designed to be installed:
t EXTERNAL
t in xed positions
Limit vibration transmission:
t use anti-vibration devices or neoprene strips on the unit support points
t install exible joints on the hydraulic connections
t install exible joints on the hydraulic connections
Choose the installation place according to the following criteria:
t Customer approval
t safe accessible position
t technical spaces requested by the unit
t spaces for the air intake/exhaust
t max. distance allowed by the electrical connections
t install the unit raised from the ground
t verify unit weight and bearing point capacity
t verify that all bearing points are aligned and leveled
t condensate water draining
t consider the maximum possible snow level
t avoid ood-prone places
Protect the unit with suitable fence in order to avoid access to unauthorised personnel (children, vandals, etc.)
A correct circulation of the air is mandatory to guarantee the good unit operating.
Avoid therefore:
t obstacles to the airow
t diculty of exchange
t leaves or other foreign bodies that can obstruct the air coil
t winds that hinder or favour the airow
t heat or pollution sources close to the unit (chimneys, extractors etc..)
t stratication (cold air that stagnates at the bottom)
t recirculation (expelled air that is sucked in again)
t incorrect positioning, close to very high walls, attics or in angles that could give rise to stratication or recirculation phenomenons
Ignoring the previous indications could:
t reduce energy eciency
t alarm lockout due to HIGH PRESSURE (in summer) or LOW PRESSURE (in winter)

M07X40A16-00 CSNX-XHE2 12.2-44.4 9
7
6
8
23
4
15
1 Positioning on concrete oor 5Positioning on steel structure
2 2 cm thick neoprene strips 6 antivibration mounts
3 concrete oor 7 steel structure
4 insulation 8 steel structure
Avoid the accumulation of snow and ice in front of the exhaust air outlet
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 condensate must be disposed in order to avoid damages to people and things.
3.5 CCK, CCKP conguration
3.6 Gas heating module - Electronic lters
For details see:
10 Accessoriesp.33

10 CSNX-XHE2 12.2-44.4 M07X40A16-00
4 Water connections
4.1 Condensate drain
The condensate must be disposed in order to avoid damages to people and things.
t Unit discharge tting: the connection must not transmit mechanical stresses and must be performed taking care not to damage the unit
discharge tting.
t Provide a siphon that, eliminating the negative pressure caused by the fan, prevents the air intake from the discharge duct.
t The ducting must have a min. slope of 3% to allow the runo.
t Anchor the ducting with an adequate number of supports.
t Insulate the duct and the siphon to avoid the condensate drippings.
t Connect the condensate discharge to a sewerage drainage network.
DO NOT use white water or drainage networks to avoid the aspiration of odours in the case of evaporation of water contained in the siphon.
Check at the end of the work, the regular condensate runo pouring some water in the tray.
For details see:
14 Dimensional drawingsp.43
4.2 Risk of freezing
If the unit or the relative water connections are subject to temperatures close to 0°C:
t mix water with glycol, or
t safeguard the pipes with heating cables placed under the insulation, or
t empty the system in cases of long non-use
4.3 Anti-freeze solution
The use of an anti-freeze solution results in an increase in pressure drop.
Make sure that the glycol type utilized is inhibited (not corrosive) and compatible with the water circuit components.
Do not use dierent glicol mixture (i.e. ethylene with propylene).
4.4 Humidier
For details see:
10 Accessoriesp.33

M07X40A16-00 CSNX-XHE2 12.2-44.4 11
5 Aeraulic connections
The dimensioning and correct execution of the aeraulic connections are fundamental to guarantee good unit operation and adequate level
of silence in the room.
When designing and manufacturing the ducting, consider LOAD LOSSES, AIR FLOW AND SPEED that must be consistent with the unit features.
Particularly consider that load losses higher than the unit useful prevalence, lead to reduction in ow rate, with consequent unit blocks.
t the weight of the channels must not burden on the connection anges
t place anti-vibration joints between channels and unit
t connection to the anges and between the various sections of the channels must guarantee air seal, avoiding dispersions penalising the
overall eciency of the system
t limit the load losses by optimising the path, the type and number of bends and junctions
t use wide bends evaluating the opportunity of equipping them with deectors (in particular with high air speed or bends with reduced
radius)
5.1 Treated air channelling
The internal surface of the channel must be smooth, enable its washing and must not contaminate the air.
Thermally isolate the channels and the anges to avoid energy losses and forming of condensation.
DIFFUSERS INLETS GRILLES
A correct diusion of the air in the room is determining for the level of comfort.
When choosing and positioning the grilles, inlets and diusers, avoid:
t excessive air speed
t forming of stagnant and stratication areas
t cold air delivery in room
t forming of localised currents (also due to uneven distribution of air)
t excessive room temperature variations, vertically and horizontally
t short circuits of the supply air towards the return air
For sound comfort, consider that:
t the air diusers must be chosen verifying the sound power generated at nominal ow rate conditions
t the cut-o to diusers must be carried out with exible elements
t the return grilles must be widely dimensioned
Thermally isolate the channels and the anges to avoid energy losses and forming of condensation.

12 CSNX-XHE2 12.2-44.4 M07X40A16-00
6 Electrical connections
The characteristics of the electrical lines must be determined by qualied electrica 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 all short circuit current, the value must be determined in accordance with
system features.
The power cables and the protection cable section must be dened in accordance with the characteristics of the protections adopted.
All electrical operations should be performed by trained personnel having the necessary qualications required by the regulations in force
and being informed about the risks relevant to these activities.
Operate in compliance with safety regulations in force.
6.1 Electrical data
The serial number label reports the unit specic 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.
The matriculation plate shows the indications foreseen by the standards, in particular:
t Voltage
t F.L.A.: full load ampere, absorbed current at maximum admitted conditions
t F.L.I.: full load input, full load power input at max. admissible condition
t Electrical wiringdiagram Nr.
6.2 Connections
1. Refer to the unit electrical diagram (the number of the diagram is shown on the serial number label).
2. Verify that the electrical supply has characteristics conforming to the data shown on the serial number label.
3. Before starting work, ensure the unit is isolated, unable to be turned on and a safety sign used.
4. Ensure correct earth connection.
5. Ensure cables are suitably protected.
6. Before powering up the unit, make sure that all the protections that were removed during the electrical connection work have been
restored.
6.3 Signals / data lines
Do not exceed the maximum power allowed, which varies, according to the type of signal.
Lay the cables far from power cables or cables having a dierent 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.
6.4 Power input
Fix the cables: if vacated may be subject to tearing.
The cable must not touch the compressor and the refrigerant piping (they reach high temparatures).

M07X40A16-00 CSNX-XHE2 12.2-44.4 13
6.5 Connections performer by customer
ALC Free contact from signalling system of re alarm HLVU Indicating light of the supply fan status
ALM cumulative fault signal KPC Pump control of the integration coil
AP25 Modulating extraction module with 0-10V signal SA1 Remote ON/OFF selector
EXT1..4 Ambient extractor potential-free contact SA5 Settable input
HLC1.1..2.2 Compressor status signal lamp SA7 Enabling selector to the umidier manual discharge
HLVE Indicating light of the return and/or supply fan status
6.6 SA5 input
SA5: Summer / Winter mode remote change
Summer - winter mode remote change
enabled by SA5* 0
enabled by thermostat 1
enabled by BMS 2
automatic 3
* Fan-only function not available
function Fan only P263
disabled 0
enabled by BMS 1
enabled by SA5* 2
*SUMMER - WINTER change mode by SA5 not available
P

14 CSNX-XHE2 12.2-44.4 M07X40A16-00
6.7 Wall mounted electronic room control

M07X40A16-00 CSNX-XHE2 12.2-44.4 15
6.8 COMMUNICATION MODULES
Serial communication module for Modbus supervisor
Serial communication module for BACnet supervisor
Serial communication module for LonWorks supervisor
DATA LINE FEATURES
Every RS485 serial line must be set up using the ‘In/Out’ bus system.
The dierence in potential between the earth of the two RS485 devices that the cable shielding needs to be connected to must be lower than
7 V
There must be suitable arresters to protect the serial lines from the eects of atmospheric discharges
A 120 ohm resistance must be located on the end of the serial line. Alternatively, when the last serial board is equipped with an internal
terminator, it must be enabled using the specic jumper, dip switch or link.
The cable must have insulation features and non-ame propagation in accordance with applicable regulations.
The RS485 serial line must be kept as far away as possible from sources of electromagnetic interference.
1. Unit
2. Metal conduit
3. Metal septums
4. Metal-lined sheath (sleeve)

16 CSNX-XHE2 12.2-44.4 M07X40A16-00
7 Start-up
7.1 General description
The indicated operations should be done by qualied technician with specic 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.
Before checking, please verify the following:
t the unit should be installed properly and in conformity with this manual
t the electrical power supply line should be isolated at the beginning
t the unit isolator is open, locked and equipped with the suitable warning
t make sure no tension is present
After turning o the power, wait at least 5 minutes before accessing to the electrical panel or any other electrical component.
Before accessing check with a multimeter that there are no residual stresses.
7.2 Preliminary checks
For details refer to the dierent manual sections.
Unit OFF power supply
1. safety access
2. functional spaces
3. air ow: correct return and supply (no bypass, no stratication)
4. structure integrity
5. fans run freely
6. unit on vibration isolators
7. air lters present and clean
8. completed aeraulic system
9. refrigerant circuit visual check
10. earthing connection
11. power supply features
12. electrical connections provided by the customer
7.3 Start-up sequence
For details refer to the dierent manual sections.
Unit ON power supply
1. compressor crankcase heaters operating at least since 8 hours
2. o-load voltage measure
3. phase sequence check
4. shut-o valve refrigerant circuit open
5. unit ON
6. load voltage measure and absorptions
7. liquid sight glass check (no bubbles)
8. check all fan operating
9. check air ow on outer coil (no by-pass, no stratication)
10. air ow rate measurement
11. supply, return and outdoor air temperature measurement
12. measure super-heating and sub-cooling
13. check no anomalous vibrations are present
14. climatic curve personalization
15. climatic curve personalization
16. scheduling personalization
17. re alarm conguration *
18. complete and available unit documentation
* only if present

M07X40A16-00 CSNX-XHE2 12.2-44.4 17
7.4 Refrigeration circuit
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.
4. Open the valves of the refrigerant circuit, if there are any.
7.5 Water circuit
1. Before realizing the unit connection make sure that the hydraulic system has been cleaned up and the cleaning water has been drained.
2. Check that the water circuit has been lled and pressurized.
3. Check that the shut-o 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.
Neglecting the washing will lead to several lter cleaning interventions and at worst cases can cause damages to the exchangers and the
other parts.
Weight of glycol (%) 10 20 30 40
Freezing temperature (°C) -3.9 -8.9 -15.6 -23.4
Safety temperature (°C) +1 -4 -10 -19
7.6 Electric Circuit
Verify that the unit is connected to the ground plant.
Check the conductors are tightened as: the vibrations caused by handling and transport might cause these to come loose.
Connect the unit by closing the sectioning device, but leave it on OFF.
Check the voltage and line frequency values which must be within the limits: 400/3/50 +/- 10%
Check and adjust the phase balance as necessary: it must be lower than 2%
Example
Working outside of these limits can cause irreversible damages and voids the warranty.
7.7 Compressor crankcase heaters
Connect the oil resistances on the compressor crankcase at least 8 hours before the compressor is to be starter:
t at the rst unit start-up
t after each prolonged period of inactivity
1. Supply the resistances switching o the unit isolator switch.
2. To make sure that heaters 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.
7.8 Voltages
Check that the air and water temperatures are within in the operating limits.
Start-up the unit.
With unit operating in stable conditions, check:
t Voltage
t Total absorption of the unit
t Absorption of the single electric loads

18 CSNX-XHE2 12.2-44.4 M07X40A16-00
7.9 Scroll compressor
The Scroll compressors have only one rotation direction.
In the event it is reversed, the compressor is not immediately damaged, but increases its noise and jeopardises pumping.
After a few minutes, the compressor blocks due to intervention of the thermal protection.
In this case, disconnect power supply and invert 2 phases on the machine power supply.
Avoid the compressor working for a long time with contrary rotation: more than 2-3 of these anomalous start-ups can damage it.
To ensure the rotation direction is correct, measure the condensation and suction pressure.
The pressures must signicantly dier: upon start-up, the suction pressure decreases whereas the condensation one, increases.
7.10 Remote controls
Check that the remote controls (ON-OFF etc) are connected and, if necessary, enabled with the respective parameters as indicated in the
“electrical connections” section.
Check that probes and optional components are connected and enabled with the respective parameters (“electrical connections”section and
following pages).
7.11 Air ow setting
The real unit ow is according to the aeraulic system features.
Before checking, make sure that the system has been completed in all its parts (shunts, dampers, grilles, diusers etc.).
Check the doors and windows of the serviced room are closed.
Calibration must be carried out with unit all in recirculation.
The unit is in full recirculation during the rst 20 minutes from start-up.
Set the ow rate:
par 50 QSetMand (l/sec)
7.12 Air ow management
Standard mode
The air ow supply remains constant in all heat load conditions and operation modes.
ECO mode
The air ow supply remains constant at varied heat loads and is shutdown when setpoint is fullled.
Variable airow
Option
The air ow supply varies depending on the heat load, up to a minimum value compatible with the distribution system and the chosen air
diusion.
The ventilation remains active even when the setpoint is fullled.
Min
123
1RPLQDO SDU46HW0DQG
$LUIORZ
Nominal
100% 75% 50% 25%
&RPSUHVVRUORDG
0
$LUIORZ
Nominal
Min
100% 75% 50% 25%
&RPSUHVVRUORDG
0
Variable airflowEco mode
Standard mode
$LUIORZ
Nominal
100% 75% 50% 25%
&RPSUHVVRUORDG
0

M07X40A16-00 CSNX-XHE2 12.2-44.4 19
7.13 ECO mode
The air ow supply remains constant at varied heat loads and is shutdown when setpoint is fullled.
To further increase the energy savings in this condition, it is also possible to set less demanding operation setpoints for the unit in respect to
the standard mode.
This function is indicated for the thermal maintenance of the served area in case it is temporarily not used, which can for example occur at
night.
The ECO mode can be activated:
t Manually: P05 Enable EcoMode = 1
t Automatically by means supervision system
Example in cooling mode:
time
time
time
6HW&RRO
SetECOCool
7LPH(FR
7LPH7HVW(FR
Fan
Compressor
Air return temp
P6HWSRLQW(&2+HDW
P6HWSRLQW(&2&RRO
P(QDEOH(FR0RGH
P7LPH(FR
P7LPH7HVW(FR
7LPH(FR 7LPH(FR
On
Off
On
Off
Set
ECO
Heat
Set
ECO
Cool
Set
Heat Set Cool
Return
DLU
WHPS
7.14 Set-point automatic compensation
The set changes automatically according to the outside temperature.
Even the operating mode changes automatically according to the outside temperature.
The variation is dened by the climatic curve.
P16
Setpoint
Outdoor temp.
P17
P15
P09
P14
P10 P11 P13 P12
6HWSRLQW
COOL
6HWSRLQW
+($7
'HDG=RQH
5°C 20°C 24°C 35°C
28°C
22°C
21°C
19°C
example
P05 EnableAutoSet = 1

20 CSNX-XHE2 12.2-44.4 M07X40A16-00
7.15 Ambient pressure control
The ambient pressure control device compares the return pressure with the external pressure and compensates any variations by acting on
the outdoor air damper.
This way, the unit maintains the relevant ambient pressure desired by the user, who can choose between the overpressure, depression or
equal-pressure.
Room pressure calibration
1. check the doors and windows of the serviced room are closed
2. calibration must be carried out with unit all in recirculation
3. on display view the state: S28 Supply dierential pressure
4. wait for the pressure value to stabilise and take note of the value
5. to maintain the room in neutral pressure, memorise the detected value in P071 SetPAmb
6. to maintain the room in overpressure, memorise a higher value respect to that detected
7. to maintain the room in depression, memorise a lower value
7.16 Fire alarm: conguration
The unit is able to manage the signal coming from a re detection system or le control unit installed built-in, activating one of the logics
illustrated,which can be set by parameter.
Par 151 TypeFireMode
In the presence of alarm signal, the compressors are Always switched o; moreover, the remote on-o is disabled together with the switch
on/o control from keypad.
The unit cannot be used as smoke extractor.
Any re detection devices built-in the unit must be considered as an auxiliary safety system, and, accordingly, must not be a replacement for
any re detection devices in the room.