Trane RAU-SVX01B-E4 Owner's manual

Installation
Operation
Maintenance
RAU
Air Cooled Condensing Unit
Sizes 190 – 260 – 300 – 350 – 400
450 – 500 – 600 – 700 – 800
RAU-SVX01B-E4
To be used with the
manual of SMM module
Reference L80 IM 022 E

© American Standard Inc. 2004 RAU-SVX01B-E4
General information
Foreword
These installation, operation and
maintenance instructions are given
as a guide to good practice in the
installation, putting into service,
operation, and maintenance by the
user, of RAU Units.They 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.
Warranty
Warranty is based on the general
terms and conditions of the
constructor. The warranty is void if
the equipment is repaired or
modified without the written
approval ofTrane, 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 chapter ”Maintenance”, it
may entail cancellation of warranty
and liabilities by the constructor.
Reception
On arrival, inspect the unit before
signing the delivery note. Specify
any damage on the delivery note,
and send a registered letter of
protest to the last carrier of the
goods within 72 hours of delivery.
Notify the local Sales Office at the
same time.
The unit should be totally inspected
within 7 days of delivery. If any
concealed damage is discovered,
send a registered letter of protest to
the carrier within 7 days of delivery
and notify the local Office.
Units are shipped with the
refrigerant operating or holding
charge and should be examined with
an electronic leak detector to
determine the hermetic integrity of
the unit. The refrigerant charge is not
included in the standard Warranty
Cover.
General
information
About this manual
Caution appears at appropriate
places in this instruction manual.
Your personal safety and the proper
operation of this machine require
that you follow them carefully.
The constructor assumes no liability
for installations or servicing
performed by unqualified personnel.
About the unit
These RAU units are assembled,
pressure tested, dehydrated, charged
and run tested before shipment. The
information contained in this manual
applies to units designated.
Refrigerant
The refrigerant provided by the
constructor meets all the
requirements of our units. When
using recycled or reprocessed
refrigerant, it is advisable to ensure
its quality is equivalent to that of a
new refrigerant. For this, it is
necessary to have a precise analysis
made by a specialized laboratory. If
this condition is not respected, the
constructor warranty could be
cancelled.

RAU-SVX01B-E4
Contents
3
Foreword 2
Warranty 2
Reception 2
General 2
Refrigerant 2
Installation
Unit nameplate 4
Installation instructions 4
Handling 4
Refrigerant lines 5
Refrigerant charge 6
Oil charge 6
General unit characteristics 7
Electrical connections 10
General start-up
Preparation 11
Start-up 11
Operation
Control and unit operation 13
Seasonal shutdown and start-up 13
Weekly start up and week-end shutdown 13
Maintenance
Maintenance instructions 14
Installation checklist 15
Troubleshooting guide 16
Operating pressures 19
Control parameters of the SMM control module 26
Safety recommendations 28
Maintenance contract 28
Training 28

4RAU-SVX01B-E4
Installation
For minimum clearance, consult the
certified submittals, which are
available on request from your Trane
Agency.
Unit nameplate
The unit nameplate gives the
complete model reference numbers.
The unit power rating is shown, and
power supplies should not deviate
by more than 5 % from the rated
power.
Compressor motor amperage is
shown in box I.MAX.
The customer’s electrical installation
must be able to withstand this
current.
Installation instructions
Foundations
No special foundations are required,
provided the supporting surface is
flat and level, and can withstand the
weight or the unit.
Anti-vibration rubber pads
They are supplied as standard with
the machine, and should be placed
between the supporting floor and
the unit to attenuate vibrations.
- 4 pads for the sizes 190 to 300
- 6 pads for the sizes 350 to 800
- Trane does not allow to install
spring isolators.
Clearance
Respect recommended clearance
around the unit to allow
maintenance operation to take place
without obstruction and
recommended clearance around
condenser.
Caution: Unit operation is function of
the air temperature. Any recycling of
the air fed out by the fans will
increase the air intake temperature
over the condenser fins and can
result in high pressure cut-out.
In this case the standard operating
conditions are modified.
Operation of the unit may be
affected by an increase in air
temperature on the condenser.
When the units are positioned in a
windy area, avoid all the risks of air-
cooled recycling.
See submittals
Handling - Figure 2
Note:
The plates welded at the end of the
bases must not be used for
handling.
Figure 2
Dimensions of recommended slings and swing-bar:
RAU 190 260 300 350 400 450 500 600 700 800
A (mm) 1500 1500 1500 1500 1500 1500 2400 2400 2300 2300
B (mm) 1800 1800 1800 1800 1800 1800 1800 1800 2200 2200
Weight - crated
(kg) 555 625 691 869 959 985 1123 1251 1695 1754
A
B

5RAU-SVX01B-E4
Refrigerant lines
Calculating and fixing the capacity
of refrigerant lines is necessary to
assure the oil return to the
compressor, avoid refrigerant phase
changes and limit pressure drop.
Liquid lines
Calculate capacity of liquid line, as
per the following criteria.
1. Maximum load operating
conditions.
2. To avoid any evaporation risk:
- Consider the vertical risers
- Maximum pressure drop must
not exceed 1 to 2°C
3. Liquid circulation speed in a 0.5
to 2m/s range.
Discharge lines
Discharge lines should be calculated
to obtain the gas displacement
speed in horizontal and vertical lines
required to drive compressor oil.
Determine diameter of discharge
lines as per the following criteria.
1. Speed above 2,5 m/s horizontally.
(Consider minimum speed at
minimum load)
2. Speed above 5,0 m/s vertically
(Vertical risers, consider speed at
minimum load)
3. Maximum speed 20 m/s.
4. Horizontal pipe run must be
pitched of 1cm/m in the same
direction as the refrigerant
circulation
5. An oil trap is necessary for
vertical risers greater than 3m.
For major elevations add an
intermediate oil trap every 5m.
6. Maximum pressure drop between
20 to 50 kPa
7. Install a filter drier adapted to
refrigerant capacity.
Insulation of refrigerant lines
Insulate refrigerant lines from
building itself to avoid transmission
to building structure of vibrations
normally caused by pipework.
Also avoid bypassing the unit's
damping system by fixing the
refrigerant lines or the electrical
ducts very rigidly.Vibrations may
propagate into building structure
through rigidly fixed refrigerant
lines.
Pressure tests. Leak detection
During operations, take the following
precaution:
1. Neither oxygen nor acethylene
should be used instead of
refrigerant and nitrogen to detect
leaks, otherwise a violent
explosion may occur.
2. Always use valves and
manometers to check the test
pressure in system. Excessive
pressure may either cause pipes
to rupture, damage unit, or cause
an explosion, causing possible
physical injury.
Carry out liquid line and hot gas line
pressure tests in accordance with
current standards.
The test pressures applied to the
liquid line and the hot gas suction
line must comply with the country's
standards.
Caution: Do not go more than 0.7
bar above the high pressure switch
setpoint.
Introduce enough refrigerant into
circuit for 85 to 100 kPa pressure,
pump-injecting dry nitrogen, and
raise pressure to 100 kPa. Search for
possible leaks using detector. This
operation should be carried out with
great care throughout the system.
If leaks are detected, reduce system
pressure, and repair defective
component. Repeat test process, to
check that the repair can withstand
rated pressure.
Caution: Unit is delivered with a
refrigerant holding charge and
isolating valves.