Trane CXAO Owner's manual

RF-SVX003A-GB
CXAO
Air to water reversible scroll heat pumps
RTXB
Air to water reversible screw heat pumps
Installation Operation
Maintenance
Original instructions

Table of Contents
RF-SVX003A-GB
2 © 2015Trane
1. General Information.................................................................................... 4
1.1. Unit reception ........................................................................................................ 5
1.2. Checks ....................................................................................................................5
1.3. Purpose of this Manual......................................................................................... 5
1.4. General Warnings.................................................................................................. 5
1.5. Unit identification.................................................................................................. 5
1.6. Warranty................................................................................................................. 6
2. Mechanical Installation............................................................................... 7
2.1 Shipping................................................................................................................. 7
2.2 Responsibility ........................................................................................................ 7
2.3 Safety .....................................................................................................................7
2.4 Handling and lifting............................................................................................... 7
2.5 Operating limits..................................................................................................... 8
2.6 Handling................................................................................................................. 8
2.7 Positioning ............................................................................................................. 9
2.8 Minimum space requirements ............................................................................. 9
2.9 Installation ........................................................................................................... 12
2.10 Safety regulations ............................................................................................... 14
2.11 General precautions............................................................................................ 14
2.12 Water piping ........................................................................................................ 19
2.13 Water treatment................................................................................................... 19
2.14 Antifreeze protection on the heat exchanger.................................................... 20
2.15 Flow switch installation ...................................................................................... 21
2.16 Hydraulic data...................................................................................................... 23
2.17 Refrigerant circuit safety valves ........................................................................ 29
2.18 Heat exchanger pressure drop ........................................................................... 29
2.19 Control and safety calibrations .......................................................................... 29
3. Electrical installation ................................................................................ 30
3.1 Electrical components......................................................................................... 30
3.2 Electrical connections ......................................................................................... 30
4. Unit operation ........................................................................................... 32
4.1 Operator Responsibilities ................................................................................... 32
4.2 Oil compressor load............................................................................................ 32
5. Pre-startup checks..................................................................................... 36
5.1 General................................................................................................................. 36
5.2 Electrical supply .................................................................................................. 37
5.3 Start-up preliminary procedures........................................................................ 38
5.4 Check list – mandatory operation control before start up ............................... 39
5.5 Refrigerant replacement procedure................................................................... 44
5.6 Refrigerant loading ............................................................................................. 48

3
RF-SVX003A-GB
6. Start up ..................................................................................................... 49
6.1 Preliminary checks............................................................................................... 49
6.2 Start up................................................................................................................. 49
6.3 Start up of the plant per unit .............................................................................. 49
6.4 Start up procedure .............................................................................................. 50
7. System maintenance ................................................................................ 51
7.1 General................................................................................................................. 51
7.2 Maintenance ....................................................................................................... 51
7.3 Sight check of the under pressure vessels state .............................................. 52
7.4 Standard Control ................................................................................................. 52
7.5 Unit test sheet...................................................................................................... 54
7.6 Recommended spare parts................................................................................. 55
7.7 Improper uses...................................................................................................... 55
7.8 Ordinary Maintenance ........................................................................................ 56
7.9 Dehydration filter repositioning......................................................................... 57
7.10 Oil Filter repositioning ........................................................................................ 58
7.11 Disposal................................................................................................................ 59
8. Service and limited warranty...................................................................60
9. Important information regarding the refrigerant used ......................... 61
10. Plant sketch ............................................................................................... 62
10.1 Standard sketch .................................................................................................. 62
10.2 Hydraulic connections ....................................................................................... 63
11. Dimensional Drawing and weight........................................................... 64
12. Troubleshooting........................................................................................ 64

4RF-SVX003A-GB
General Information
WARNING! It is strongly recommended to sign a maintenance contract with an authorized service center to ensure
an efficient and trouble-free.This manual describes the features and procedures common to the whole number of
units. All units are shipped with schematic and dimension drawings, dimensions and weights which are specific
to the unit.WIRING AND OVERALL DESIGN OF SPECIFIC TO BE CONSIDERED AS AN INTEGRAL PART OF THIS
MANUAL. In case of discrepancy between this manual and the two documents cited prevail as shown on the wiring
diagram and outline drawing.
Foreword
These instructions are given as a guide to good practice in the installation, start-up, operation, and maintenance
by the user, of aTrane RTXB or CXAO heat pump chiller.
A separate manual is available for the use and maintenance of the unit’s controller.
These instructions do not contain full service procedures necessary for the continued successful operation of this
equipment.
The services of a qualified technician should be employed through the medium of a maintenance contract with a
reputable service company.
Read this manual thoroughly before unit start-up.

5
RF-SVX003A-GB
Unit reception
1.1. Unit reception
The unit must be inspected for any possible damage
immediately upon reaching its final place of installation.
All components described in the delivery note must be
carefully verified and checked; any damage must be
reported to the transporter. Check the unit nameplate,
before connecting it to earth, that the model and power
supply voltage are as ordered. Responsibility for any
damage after acceptance of the unit cannot be attributed
toTrane.
1.2. Checks
Please perform the following checks upon reception
of the unit, for your protection in the event that it is
incomplete (any missing parts) or has incurred damage
during transport:
a) Before accepting the unit, please verify every
single component in the consignment. Check for
any damage.
b) In the event that the unit has been damaged,
do not remove the damaged material. A set
of photographs are helpful in ascertaining
responsibility.
c) Immediately report the extent of the damage to
the transporter and immediately request that they
inspect the unit.
d) Immediately report the extent of the damage to
theTrane representative, so that arrangements
can be made for the required repairs. In no case
must the damage be repaired before the unit
has been inspected by the representative of the
transportation company.
e) Upon reception of the unit it is the customer’s
responsibility to check that there is no obvious
damage or pieces missing. If this is so, an
immediate complaint must be made to the carrier
for damage or for not-delivery and the Receiving
Card to be found inside the unit electrical panel
must be filled in. Photographic evidence must
be provided for macroscopic damage.The card
must be sent toTrane within 8 days of receiving
the goods: if it is not sent back or delayed, the
complaint will not be accepted.
1.3. Purpose of this Manual
The purpose of this manual is to allow the installer and
the qualified operator to carry out all required operations
in order to ensure proper installation and maintenance
of the unit, without risking any damage to people,
animals and/or objects.
This manual is an important supporting document for
qualified personnel but it is not intended to replace
such personnel. All activities must be carried out in
compliance with local laws and regulations.
1.4. General Warnings
This publication has been prepared only as a support
and does not constitute a binding offer toTrane.
Trane has compiled the content to the best of their
knowledge. No express or implied warranty is given for
the completeness, accuracy, reliability of the content.
All data and specifications in it shown are subject
to change without notice. Trane explicitly rejects any
liability for any direct or indirect damage, in the broadest
sense of the term, arising from or related to the use
and / or interpretation of this publication. All content is
copyrighted byTrane.
1.5. Unit identification
The unit is identifiable through:
• Packaging label: the identification data of the
product
• Technical Label: the technical data of the product.
Tampering with, removal, lack of identification markings
or anything else does not allow reliable identification
of the product, makes it hard for any installation and
maintenance.
Identification label
It shows the serial number and size, the production year,
the electric data, the main technical data, manufacturer’s
logo and address.
In case of loss, request for a duplicate to the after sales
service.Tampering and/or rehandling the label does
not allow the identification of the product, and makes
difficult any installation and maintenance operation.
Serial number
The serial number identifies the unit unambiguously. It
permit to identify the specific characteristics of the unit
and the installed components. Without this code it is not
possible to identify the specific spare parts of the unit if
repairs are needed.
Thermal Performance
Units are tested at the factory, in separate stations,
according to an internal procedure. Each performance
testing taken in the system is possible if and only if they
are reproduced and maintained in the same conditions
(constant load, constant of temperature and flow rates of
evaporation - condensation and recovery, the quality and
the tolerance of the measuring instruments, etc. ..)
The test conditions are those specified by the customer
when ordering: in the absence of precise information,
refer to the nominal values specified in the product
catalog in force on the date of the Order Confirmation.

6RF-SVX003A-GB
1.6. Warranty
A. Warranty is based on the general terms and
conditions of the manufacturer.The warranty is void
if the equipment is repaired or modified without the
written approval of the manufacturer, if the operating
limits are exceeded or if the control system or the
electrical wiring is modified. Damage due to misuse,
lack of maintenance or failure to comply with the
manufacturer’s instructions or recommendations is
not covered by the warranty obligation. If the user
does not conform to the rules of this manual, it may
entail cancellation of warranty and liabilities by the
manufacturer.
B. Warranty is twelve (12) months as from the date of
start up at installation place or eighteen (18) months
after delivery at the project or other delivery location
indicated by the customer. The date the unit is
operated for the first time means the date reported
in the “1st start up form” contained into the “unit log
book”. This form should be filled in and sent, within
8 days from the start up, to Trane.
C. The warranty is valid if all the installation and start-up
instructions have been adhered to (both those which
may have come fromTrane and those coming from
current practice), if the “1st start up form” has been
filled in and sent to theTrane after sales department.
D. The warranty is subject to any faults or defects being
reported within eight days from their discovery.
The warranty will only be applied if and when the
purchaser suspends use of the equipment as soon as
a defect has been found.
D1. Repositioning items are to be considered always ex
TRANE factory. Labour costs to replace failed items
either under warranty or not, will be not of TRANE
care.
E. The warranty is valid if the first running of the unit is
carried out by aTrane authorised assistance center.
F. The warranty is subject to regular maintenance of the
unit which is appropriately indicated in the “unit log
book” located inside the electrical panel.
G. Warranty automatically ends in case of payments not
fulfilled, non-performance of the contract and even
if the units show tampering withoutTRANE writing
approvals.
Warranty

7
RF-SVX003A-GB
2. Mechanical Installation
2.1 Shipping
The stability of the unit during shipping must be
ensured. If the unit is shipped with a wooden cross-plank
on its base, this cross-plank must only be removed after
the final destination has been reached.
2.2 Responsibility
Trane declines all present and future responsibility for
any damage to persons, animals or things caused by
negligence of operators failing to follow the installation
and maintenance instructions in this Manual. All safety
equipment must be regularly and periodically checked
in accordance with this manual and with local laws
and regulations regarding safety and environment
protection.
2.3 Safety
• The unit must be securely fixed to the ground.
• The unit can only be lifted using the hoist points
marked in yellow that are fixed to its base.These
are the only points that can support the entire
weight of the unit.
• Do not allow unauthorised and/or unqualified
personnel access to the unit.
• It is forbidden to access the electrical components
without having opened the unit’s main switch and
switched off the power supply.
• It is forbidden to access the electrical components
without using an insulating platform. Do not
access the electrical components if water and/or
moisture are present.
• All operations on the refrigerant circuit and on
components under pressure must be carried out
only by qualified personnel.
• Repositioning of a compressor or addition
of lubricating oil must be carried out only by
qualified personnel.
• Sharp edges and the surface of the condenser
section could cause injury. Avoid direct contact.
• Switch off the unit’s power supply, by opening
the main switch, before servicing the cooling
ventilators and/or compressors. Failure to observe
this rule could result in serious personal injury.
• Avoid introducing solid objects into the water
pipes while the unit is connected to the system.
• A mechanical filter must be applied to the water
pipe to be connected to the heat exchanger inlet.
• The unit is supplied with safety valves, that are
installed both on the high-pressure and on the
low-pressure sides of the refrigerant gas circuit.
WARNING!
Before carrying out any operation on the unit, please
read the instruction and operating manual. Installation
and maintenance must be carried out solely by
qualified personnel that is familiar with local rules
and regulations and has experience with this type of
equipment. Installation of the unit must be avoided in
any place that could be considered dangerous during
maintenance procedures.
WARNING!
The installation of the unit must be avoided in any place
that can be considered dangerous during maintenance,
such as (but not only) covers without parapets or
railings or without proper clearances.
2.4 Handling and lifting
Avoid bumping and/or jolting during unloading from the
lorry and handling the unit. Do not push or pull the unit
from any part other than the base frame. Block the unit
from sliding inside the lorry in order to prevent damage
to the panels and to the base frame. Avoid any part of
the unit falling during unloading and/or handling, as this
could cause serious damage.
Mechanical Installation

8RF-SVX003A-GB
2.5 Operating limits
2.5.1 Storage
The units can be stored within the following
environmental conditions:
Min ambientTemperature : -10°C
Max ambientTemperature : 53°C
Max Relative Humidity : 95% not condensable
WARNING! Storage at temperatures below the
minimum specified can cause damage to some parts
including the electronic controller and its LCD display.
Storage at temperatures above the maximum indicated
causes the opening of the safety valves placed on the
suction line of compressors.
The storage in a condensed atmosphere can damage
electronic components.
2.5.2 Operation
Operation of the units is permitted within the limits
indicated in the product catalog.These operating limits
apply to unit operating at full load.
WARNING! Operation outside the limits specified may
cause the operation of the protections and disrupt
operation of the unit and, in extreme cases, damage the
unit.
In case of doubt, consult the factory.
2.6 Handling
Check the weight of the unit and the ability to load the
lifting device. Be careful of obstacles placed in the path
that may damage the units/ (bumps, ramps, hills, etc...)
Verify the perfect
stability during
handling of
the unit. Do
not perform
dangerous
operations that
could damage the
unit.
Lifting holes
Make sure that during transport the goods do not arrive in positions not provided. Horizontal
positioning of the unit can lead to irreversible damage to the compressors. Damage arising
from incorrect transport will not be under warranty by the manufacturer. Immediately report an
incorrect receipt of goods. An arrow positioned upward, indicating the vertical position of the unit.
WARNING! The lifting ropes and the spreader bar and/or balance must be sized to hold the weight of the unit
safely. Check the weight of the unit on the nameplate of the unit.The weights given in the tables “Technical data”
in “General Information” refer to standard units, without any options. The unit may have specific accessories that
increase the overall weight (pumps, copper / copper, etc..).
WARNING! The unit must be lifted with the utmost attention and care. Avoid abrupt lifting.
Operating limits

9
RF-SVX003A-GB
2.7 Positioning
Positioning and installation
All units are produced for installation outdoors, on
balconies or on the ground, provided that the area is free
from obstacles that could hamper air flow towards the
condenser coils.
The unit must be installed on a robust and perfectly level
foundation; should the unit be installed on balconies
and/or attics, it could be necessary to use weight
distribution beams.
For installation on the ground, a strong cement base that
is at least 250 mm wider and longer than the unit must
be foreseen. Also, this base must be able to support
the weight of the unit as declared in the technical
specifications.
If the unit is installed in places that are easily accessible
for people and animals, it is advisable to install coil and
compressor section protection grates.
To ensure the best possible performance on the
installation site, the following precautions and
instructions must be followed:
• Avoid air flow recirculation
• Make sure that there are no obstacles to hamper
air flow.
• Air must circulate freely to ensure proper intake
and expulsion.
• Ensure strong and solid flooring to reduce noise
and vibrations as much as possible.
• Avoid installation in particularly dusty
environments, in order to reduce soiling of
condenser coils.
• The water in the system must be particularly clean
and all traces of oil and rust must be removed.
Installation of a mechanical water filter is required
for the unit’s input piping.
2.8Minimum space requirements
Dimensional drawing shall be be respected to avoid
causing:
• Noise
• Incorrect heat exchange and ventilation
• Difficult maintenance or inaccessibility to
components
It is fundamental to respect minimum distances on all
Trane units, in order to ensure optimum ventilation for
the condenser coils. Limited installation space could
reduce the normal air flow, thus significantly reducing
the unit’s performance and considerably increasing
consumption of electrical energy.
When deciding where to position the unit and to ensure
a proper air flow, the following factors must be taken
into consideration:
• Avoid any warm air recirculation and insufficient
supply to the air-cooled condenser. Both these
conditions can cause an increase of condensing
pressure, which leads to a reduction in energy
efficiency and refrigerating capacity.Thanks to
the geometry of their air-cooled condensers,
Trane units are less affected by bad air circulation
situations. Also, Trane software has a particular
ability for calculating the unit’s operating
conditions and for optimising the load under
abnormal operating conditions.
• Every side of the unit must be accessible for post-
installation maintenance operations. Figure below
shows the minimum space required.
• Vertical air expulsion must not be obstructed
as this would significantly reduce capacity and
efficiency. If the unit is positioned in such a way
as to be surrounded by walls or with obstacles of
the same height as the unit, it must be installed
at a distance of at least 2500 mm. If these
obstacles are higher, the unit must be installed at
a distance of at least 3000 mm. Should the unit
be installed without observing the recommended
minimum distances from walls and/or vertical
obstacles, there could be a combination of warm
air recirculation and/or insufficient supply to
the air-cooled condenser which could cause a
reduction of capacity and efficiency. In any case,
the microprocessor will allow the unit to adjust
to new conditions by producing the maximum
available capacity, even if the lateral distance is
lower than recommended.
• When two or more units are positioned side by
side, a distance of at least 3600 mm between
condenser coils is recommended.
Positioning

10 RF-SVX003A-GB
Minimum space requirements
In any case, the microprocessor will allow the unit to adapt to the new condition producing the maximum available
capacity (which would, however, lower than the nominal capacity of the unit) even with a lateral distance less than
the recommended. When two or more units are positioned side by side, it is recommended that a minimum distance
of 3600 mm of distance between the condenser coils.
Condensate
The unit in order to easily discharge the condensate caused by the heat pump operation, especially during the
defrosting cycle. Avoid the condensate drain in location where people pass.
◄►
◄►
◄►
◄►
3000
500
1800
1800
1500 1500
3600
1500

11
RF-SVX003A-GB
Anti-vibration
Secure the bottom part of the anti-vibration to the
foundation which will support it.
Fix the anti-vibration bolts.
Screw nut and lock nut to adjust the proper leveling of the
unit.
The units positioned incorrectly can cause damage to the
compressor to incorrect leveling of the oil.
Minimum space requirements

12 RF-SVX003A-GB
2.9 Installation
Installation side selection
Before installing the unit, agree with the customer the
location where it will be placed, taking into account the
following points:
• The foundation must be able to support the
weight of the unit;
• Safety distances between the unit and other
equipment or structures to ensure that the air in
and out from the fans is free to circulate.
Installation
Positioning
Before handling the unit, verify the lifting capacity of the
means respecting the information on the packaging. For
handling the unit on horizontal base use forklift or other
means in an adequate way paying attention on the unit
weight. In case of lifting, insert bars in the proper holes
of the unit base in order to permit the positioning of the
lifting ropes and of the safety cotter pin.
In order not to damage the unit structure by the belts,
use proper protections to be put between the belts and
the unit. Position the unit in the place indicated by the
client by interposing between the base and the support,
a gum mattress (thickness min. 10 mm.) or anti-vibration
feet (optional). Fix the unit verifying that the base is plan
and without inclinations.
Verify the easy access to the hydraulic system and
electrical components. In case of installation in places
where there could be gust, fixing the unit to the support
properly using guy rope if needed.
Handling and positioning
The units have been designed to be lifted from above by
means of eyebolts and holes in the base members. Use
retractor bars to keep the lifting wires or chains away
from the unit. Lifting procedures provided with the unit
have to be respected.
Precautions for dominant winds
Avoid obstacles on suction and discharge sides of the
units. Respect the servicing spaces as shown on the
units dimensional drawings.
In case of presence of dominant winds in the installation
area it is strictly necessary to avoid (for units with
horizontal flow fans) that such winds blow in front of the
unit (fans discharge side). In case of unit with vertical
flow fans it is strictly necessary to avoid installations
where the dominant winds could cause rejected hot air
to come back to the condensing coils.
If needed, install windbreak barriers (in this case contact
our offices).
Precautions against direct sunshine
Direct sunshine can raise the condensation temperature
and it causes the unit stopping or the missing set-up
because of the high-pressure switch intervention.
Precautions against chimney and hot air discharge
Avoid the unit installation lee side near chimney and
liquid and gas discharge.
NO YES

13
RF-SVX003A-GB
WARNING!
Do not use forklift trucks to lift the unit from below.
If equipment for lifting from above is not available, use
rollers to move the unit.
The surface on which the unit is placed must be flat and
strong enough to withstand the weight of the unit while
running.
In order to reduce the transmission of vibrations
to the supporting structures, fit shock absorbers in
every fastening point. Rubber shock absorbers are
recommended for units installed on the ground, spring
shock absorbers for units installed on roofs. Open spaces
around the unit must be provided for in order to allow
for the passage of necessary airflow and in order to
allow normal maintenance to be carried out (as shown
on general catalogues).
NOTE: if two units have to be installed side by side, the
distance must be doubled.
Installation

14 RF-SVX003A-GB
2.10 Safety regulations
Preamble
AllTrane units are designed, built and inspected in
compliance with the European Community Directives n°
98/37/CE (three phase power supply), EN 60335 Part 1
and 2, low voltage directive 73/23CEE, electromagnetic
compatibility directive EMC 89/336CEE, Pressure
Equipment Directive 97/23/CEE. Before using the unit
read carefully the recommendations reported in the
following manual.
Definition
Owner:The legal representative of the company, body
or natural person who owns the plant in which theTrane
unit is installed: he or she is responsible for the control
and respect of all the safety regulations indicated in this
manual as well as the national ones in force.
Installer:The legal representative of the company
appointed by the owner to position and hydraulically,
electrically etc. connect theTrane unit to the plant:
he or she is responsible for handling and the correct
installation of the unit in accordance with the indications
in this manual and with the national regulations in force.
Operator: A person authorised by the owner to carry out
all the operations of regulation and control on theTrane
unit which are specifically mentioned in this manual. He
or she should keep to actions described in the manual
and limit his or her action to what is explicitly allowed.
Technician: A person who is directly authorised byTrane
or, secondarily, for all EU countries except for Italy, by
the distributor of theTrane product, under their own
responsibility, to carry out all ordinary or extraordinary
maintenance operations, as well as regulations, controls,
repairs and parts repositioning which may be necessary
during the lifetime of the unit.
Access to dangerous areas
The access to the unit dangerous areas is usually
obstructed through protection panels, which are
removable, by using a tool. Axial fans are protected
with accident prevention grilles. Centrifugal fans are not
protected on the discharge, as they have to be connected
to ducts. In case they have to run without ducts, it is the
installer duty to provide protection grilles.
Finned coil, for units not equipped with coil protection
grilles, is completely accessible with danger for cuts and
abrasions. In these cases technicians and operators must
be aware about this risk.
For all the units which allow access to the cooling piping
or to the packaged condensing coils with fins, without
security gratings (optional) or closing panelling, the
following precautions must be taken:
-mark the areas with contact risks.
-apply WARNING! signs.
The danger zone must be of a suitable size to avoid
any contact, even accidental contact. In the presence
of safety valves without relevant remote controls, the
operating area must be of a size which considers a
range of action of the discharge flow of 3 meters.Trane
declines any responsibility for damage to things and
unauthorised personnel in case of absence of clear
and static limiting systems of the risk areas and of the
relevant WARNING! and danger signs.
2.11 General precautions
The operator must only intervene on the unit commands;
he or she must not open any panels except for the one
which gives access to the command module.
The installer must only intervene on the connections
between the plant and the unit; he or she must not open
any unit panels nor carry out any commands.
The following precautions should be made when
approaching or working on the unit:
• Do not wear jewellery, baggy clothes or any other
accessory which can get caught up.
• Use appropriate protection (gloves, glasses
etc.) when using an open flame (welding) or
compressed air.
• If the unit is located in a closed environment, wear
hearing protection.
• Before disconnecting, rehandling tubes, filters,
joints or other line parts intercept the connection
tubes, empty them until the pressure reaches that
of the atmosphere.
• Do not use your hands to check for possible
pressure losses.
• Always use tools which are in good condition;
make sure the instructions have been fully
understood before using them.
• Make sure that any tools, electrical cables or other
loose objects have been removed before closing
the unit and starting it up again.
Safety regulations

15
RF-SVX003A-GB
Precautions against risks due to the refrigerant
Safety data
Toxicity Not important
Risks for skin
touching
Splashes or sprinkles can cause frostbite. The risk of absorptions through the skin
is not relevant..
Those refrigerants could take some lightly irritating effects and in liquid stage they
have a strong skinning effect. In this case it is necessary to rinse with fresh water
the contaminated parts of the skin.
The refrigerant in liquid stage in contact with wet clothes cause freezing and
adherence to the skin. In this case it is necessary to put off the contaminated
clothes to avoid freezing. Please contact a doctor in case of irritation of the
contaminated parts.
Risks for contact
with the eyes
Vapors don’t take any effect. Splashes or sprinklers can cause frostbite. In those
cases it is necessary to rinse the eyes with water or with solution for ocular
washings for 10 minutes. The intervention of a doctor is needed.
Risks for ingestion
Should it happen, it causes frostbite. It does not cause vomiting. The person must
be kept awake. It is needed to rinse the mouth with fresh water and to drink
almost 0,25 liters. The intervention of a doctor is needed.
Risks for inhalation
High concentration of vapours in air can lead to anaesthetic effects up to a loss of
conscience. Long exposures could give rise to cardiac arrhythmia and sometimes
even to death.
High concentrations can create a reduction of oxygen in air, with consequent
possibility of suffocation. Should it happen the person must be taken to the open
air and let him to take a rest.
Administer oxygen if needed. In case the breathing has interrupted or become
irregular, it is necessary to do artificial breathing. In case of cardiac arrest a heart
massage must be applied. Contact a doctor immediately.
Conditions to avoid Use in presence of exposed flames, and of high levels of humidity.
Dangerous reactions
Possibility of violent reactions with sodio, potassio, barium and with other alkaline
substances, Incompatible materials and all the alloys containing more than 2% of
magnesium.
Protection wearing
- Behavior in case of
losses or escapes
Wear protection apparel and self respirators. Insulate the source of the loss, if this
operation can be done in safety conditions. Small quantitative of refrigerant escaped
at liquid state can be allowed to evaporate only if the room is well ventilated. In
case of great losses ventilate the room immediately. Plug the loss with sand, soil
or other absorbent material; avoid that the liquid refrigerant can enter in water-
drainages or losing pools.
Disassembly
The best procedure is refrigerant recovery and recycling. If this is not possible the
refrigerant must be conferred to an accredited system for its destruction in order
to neutralize acid and toxic by-products.
General precautions

16 RF-SVX003A-GB
Precautions against residual risks
Prevention from risks due to the command system
• Make sure the instructions for use have been
understood before carrying out any work on the
control panel.
• Always keep the instruction manual close at hand
when working on the control panel.
• Start up the unit only after having certified that it is
correctly connected to the plant.
• Inform the technician promptly of any alarms which
appear on the unit.
• Do not reset the alarms to manual restart without
having first identified the cause and removed it.
Prevention against residual mechanical risks
• Install the unit in accordance with the provisions of
the following manual.
• Carry out all the maintenance operations provided for
by this manual regularly.
• Wear a protective helmet before entering inside the
unit.
• Before opening a unit panel make sure that it is firmly
connected by means of a hinge.
• Do not touch the air condensation coils without
having first put on protective gloves.
• Do not remove the protections to the handling parts
while the unit is running.
• Before restarting the unit make sure that the handling
part protections are in the correct position.
Prevention against residual electrical risks
• Connect the unit to the mains in accordance with the
provisions of this manual.
• Carry out all maintenance operations regularly.
• Before opening the control panel disconnect the unit
from the mains by means of the external knife switch.
• Check that the unit has been earthen correctly before
starting it up.
• Control all the electrical connections, the connection
cables paying particular attention to the state of
isolation; replace the cables which are clearly worn or
damaged.
• Carry out periodic checks of the wiring inside the
panel.
• Do not use cables with an inappropriate section or
flying connections not even for a limited period or in
an emergency.
Prevention against residual risks of a different
nature
•The residual risk due to pressure are mainly coming
from non functioning of the safety devices.To
prevent them it is necessary to follow the checks and
repositionings as following indicated (§12.1 and 13)
•To protect from safety devices exhausting it is not
allowed to remove the protections while the unit is in
operation and to approach the unit without wearing
the right protections. In case of accidental contact
with refrigerant due to the safety valves exhaust it is
necessary to follow the above indicated (§2.5)
• Carry out the plant connections to the unit by
following the indications reported on the following
manual and on the panels of the unit itself.
• If a part is disassembled, make sure that it is correctly
reassembled before restarting the unit.
• Do not touch the discharge line of the compressor,
the compressor itself or any other tube or component
which is inside the unit without putting on protective
gloves.
• Keep a fire extinguisher which is able to put out fires
on electrical equipment near the unit.
• On units installed inside, connect the refrigerant
circuit shut off valve to a network of tubes which are
able to lead the possible spillage of refrigerating fluid
outside.
• Eliminate any fluid loss inside or outside the unit.
• collect the discharge liquid and clean up any possible
oil leakage.
• Periodically clean the compressor casing of the
accumulated dirt deposits.
• Do not keep inflammable liquids near the unit.
• do not dispose of the refrigerant fluid and the
lubricating oil in the environment.
• Welding should only be carried out on empty tubes;
do not approach the tubes containing refrigerant fluid
with flames or other sources of heat.
• Do not bend or strike tubes containing pressurised
fluids.
Also always take the following precautions:
Precautions to be observed during maintenance
operations
Only Authorised technicians may carry out maintenance
operations.
WARNING! Hazardous Voltage w/Capacitor!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run and any
capacitors before servicing.
Follow proper lockout/tagout procedures to ensure the
power cannot be inadvertently energized.
Before carrying out any maintenance the following must
be performed:
• Isolate the unit from the main electricity by using the
external knife switch.
• Place a notice on the external knife switch which says
“do not use - maintenance in progress”.
• Make sure that any possible on-off commands are
disabled.
General precautions

17
RF-SVX003A-GB
• Use appropriate safety equipment (helmet, isolating
gloves, protective glasses, safety shoes etc.).
If measurements or controls must be carried out which
require the unit to be running the following observations
must be followed:
• Operate with the electrical panel open for as short a
time as is possible.
• Close the electrical panel as soon as the individual
measurement or control has been carried out.
• For units which are located outside, do not carry out
interventions in dangerous atmospheric conditions
such as rain, snow, fog etc.
The following precautions should also be taken at all
times:
• Never dispose of fluids contained in the refrigerant
circuit into the environment.
• When replacing an EPROM or electronic card always
use appropriate equipment (extractor, anti static
bracelet, etc.).
• If a compressor, evaporator, condensation coils or
any other heavy part is to be replaced, make sure that
the lifting equipment matches the weight to be lifted.
• In the air cooled units with an independent
compressor compartment, do not open the ventilator
compartment without having first isolated the unit
using the knife switch on the side of the panel and
only after having placed a sign which says “do not
use - maintenance in progress”.
• If modifications must be carried out to the cooling,
hydraulic or electrical circuit of the unit, as well as to
its command logic, contactTrane.
• If particularly complicated assembly or disassembly
operations are to be carried out, contactTrane.
• Always use original spare parts bought directly from
Trane or from official dealers of the companies
reported in the list of recommended spare parts.
• If the unit is to be moved after a year of being in the
site or if it has to be dismantled, contactTrane.
Precautions against foliage and external body
Avoid the unit installation nearby plants which could
obstacle the correct air charge and discharge.
WARNING!
Do not use forklift trucks to lift the unit from below.
If equipment for lifting from above is not available, using
rollers may move the unit.
The surface on which the unit is placed must be flat and
strong enough to withstand the weight of the unit while
running.
In order to reduce the transmission of vibrations
to the supporting structures, fit shock absorbers in
every fastening point. Rubber shock absorbers are
recommended for units installed on the ground, spring
shock absorbers for units installed on roofs. Open
spaces around the unit must be provided for in order to
allow for the passage of necessary airflow and in order
to allow normal maintenance to be carried out (as shown
on general catalogues).
CAUTION: if two units have to be installed side by side,
the distance must be doubled.
Precaution against frost risk of the hydraulic pipes
It is necessary to insulate pipes in the plant to avoid
extreme heat loss and to protect them from weather
conditions.The problem of water pipes freezing could
appear in two different situations:
• Unit standby, with mode on, but electrically
connected: in this case, the unit has frost
resistances, which protect the wather locally
contained in the exchangers and in the pipes from
ice formation.These resistances do not warranty
the protection against the frost in the outdoor
connection pipes, to be prevent by frost protection
systems.Trane suggest to insert frost thermostatic
resistances on every outdoor pipes. In the
following table there are the indicative electric
power per pipe linear meter:
General precautions
dn inch W/mt
8 1/4” 5
10 3/8” 5
15 1/2” 5
20 3/4” 10
25 1” 13
40 1” 1/2 30
50 2” 50
65 2” 1/2 80
80 3” 120
100 4” 200
125 5” 300
150 6” 450
200 8” 750

18 RF-SVX003A-GB
• Electrically unconnected unit: in this case the
frost resistances of the unit could not warranty
the protection. So it is absolutely necessary
unload the unit content for A.C.S., instead for air
conditioning it is necessary to add the correct
glycol quantity indicated in the chapter: “Ethylene
glycol correction table”.
Precaution for very low outdoor temperature
The unit has variable flow pumps on the primary circuit
which allow to start with low water temperature in the
storages or in the plant, automatically, but the water
temperature should not be lower than 10°C.
In case of installation conditions with a lower
temperature:
1. If there are storages, insert electric resistances to
be calculated by :
PrWatt = V x (10 – tmin) / 860
where: PrWatt is the resistance power (Watt) and tmin is
the lower temperature (°C)
2. If there are not storages, maintain the
temperature higher than 10°C the water
temperature by inserting thermostatic resistance
with power calculated as in case 1.
Control of compressor fastening
The compressors are fitted on shock absorbers. After
receiving the unit check if there are blockages to fasten
the compressors during the transportation. If there
are, it is necessary to remove blockages put to fasten
the compressors feet before the start-up otherwise the
warranty is not valid.
Acoustic Protections
When the sound level must be checked in particular, it
is necessary to pay attention to isolation from the base
of the unit properly applying the anti-vibration mounts
(provided optionally). Also, install flexible joints on water
connections.
General precautions

19
RF-SVX003A-GB
2.12 Water piping
Piping must be designed with the lowest number of
curves and the lowest number of vertical changes of
direction. In this way, installation costs are reduced
considerably and system performance is improved.
The hydraulic system should have:
1. Anti-vibration supports in order to reduce transmission
of vibrations to the underlying structure.
2. Sectioning valves to isolate the unit from the hydraulic
system during servicing.
3. Manual or automatic air bleeding device at the
system’s highest point. Drainage device at the
system’s lowest point. Both the evaporator and the
heat recovery device must not be positioned at the
system’s highest point.
4. A device that can maintain the hydraulic system under
pressure (expansion tank, etc.)
5. Water temperature and pressure indicators on the unit
to aid servicing and maintenance operations.
6. A filter or device that can remove extraneous particles
from the water before it enters the pump (Please
consult the pump manufacturer’s recommendations
for an appropriate filter to prevent cavitation). Use of a
filter prolongs the life of the pump and helps keep the
hydraulic system in best condition.
7. Another filter must be installed on the pipe conveying
ingoing water to the unit, near the evaporator and heat
recovery (if installed).The filter avoids solid particles
entering the heat exchanger, as they could damage it
or reduce its heat exchanging capacity.
8.The shell and tube heat exchanger has an electrical
resistance with a thermostat that ensures protection
against water freezing up to an outdoor temperature of
– 25°C. All the other hydraulic piping outside the unit
must therefore be protected against freezing.
9.The heat recovery device must be emptied of water
during the winter season, unless an ethylene glycol
mixture in appropriate percentage is added to the
water circuit.
10. If the unit is installed in order to replace another,
the entire hydraulic system must be emptied and
cleaned before the new unit is installed. Regular
tests and proper chemical treatment of water are
recommended before starting up the new unit.
11. In the event that glycol is added to the hydraulic
system as anti-freeze protection, pay attention to
the fact that intake pressure will be lower, the unit’s
performance will be lower and water pressure drops
will be greater. All unit-protection methods, such as
anti-freeze, and low-pressure protection will need to
be reset. Before insulating water piping, check that
there are no leaks..
Water piping
1 Gauge
2 Flexible connector
3 Flow switch
4Thermometer
5 Isolating valve
6 Pump
7 Filter
1 Gauge
2 Flexible connector
4Thermometer
5 Isolating valve
6 Pump
7 Filter
EVAP

20 RF-SVX003A-GB
Hydraulic connection heat recovery
WARNING!
Install a mechanical filter at the entrance of each heat
exchanger. Failure to install the filter mechanic allows
access of solid particles and / or welding slag inside the
heat exchanger. We recommend the installation of a filter
having a filtering net with holes not exceeding 0.5 mm in
diameter.The manufacturer can not be held responsible
for any damage to heat exchangers, due to the lack of
the mechanical filter.
2.13 Water treatment
Before putting the unit into operation, clean the
hydraulic circuit. Dirt, scales, corrosion residue and other
extraneous material can accumulate inside the heat
exchanger and reduce its heat exchanging capacity.
Pressure drops can increase, as well, thus reducing
water flow. Proper water treatment therefore reduces
the risk of corrosion, erosion, scaling, etc.The most
appropriate water treatment must be determined
locally, according to the type of system and to the local
characteristics of the process water.
For units equipped with plate exchangers the filter
should warranty a filtration of particles until 0,8 mm.
For units equipped with shell&tube exchangers the filter
should warranty a filtration of particles until 1,2 mm.
Trane is not responsible for damage to or malfunctioning
of equipment caused by failure to treat water or by
improperly treated water.
Water piping
Table - Acceptable water quality limits
2.14 Antifreeze protection on the heat
exchanger
Evaporator and recovery exchangers anti-
freeze protection
All evaporators are supplied with a thermostatically
controlled anti-freeze electrical resistance, which
provides adequate anti-freeze protection up to –25°C.
However, this method is not the only protection
system against freezing, unless the heat exchangers
are completely emptied and cleaned with anti-freeze
solution.
Two or more protection methods should be foreseen
when designing the system as whole:
1. Continuous water flow circulation inside piping and
exchangers.
2. Addition of an appropriate amount of glycol inside the
water circuit
3. Additional heat insulation and heating of exposed
piping
4. Emptying and cleaning of the heat exchanger during
the winter season
It is the responsibility of the installer and/or of local
maintenance personnel to ensure two or more of the
described antifreeze methods. Continuously verify,
through routine checks, that appropriate anti-freeze
protection is maintained.
Failure to follow the instructions above could result in
damage to some of the unit’s components. Damage from
freezing is not covered by the warranty.
PH (25°C) 6,8÷8,0 Total hardness (mg CaCO3/ l) 200
Electrical conductivity S/cm (25°C) 800 Fe (mg Fe / l) 1.0
Chloride ion (mg Cl- / l) 200 Sulphide ion (mg S2- / l) Absent
Sulphate ion (mg SO24- / l) 200 Ammunium ion (mg NH4+ / l) 1.0
Alkalinity (mg CaCO3/ l) 100 Silica (mg SiO2/ l) 50