Trane CXAO Installation Operation & Maintenance page 17

• 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 fl uids 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 fi rst 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 modifi cations must be carried out to the cooling,
hydraulic or electrical circuit of the unit, as well as to
its command logic, contact Trane.
• If particularly complicated assembly or disassembly
operations are to be carried out, contact Trane.
• Always use original spare parts bought directly from
Trane or from offi cial 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, contact Trane.
RF-SVX003A-GB
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 fl at and
strong enough to withstand the weight of the unit while
running.
In order to reduce the transmission of vibrations
to the supporting structures, fi t 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 airfl ow 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:
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
General precautions
17