Trane CGCL 200, Installation Operation & Maintenance

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General start-up
Start-up preparation
Carry out all operations on check list
and that the unit is correctly
installed and ready to operate.
The installer must check all the
following points before calling in the
Trane Servicing Department to put
the equipment into service:
- Check position of unit
- Check unit is level
- Check type and position of rubber
pads
- Check clearance required for
maintenance access (See submittals)
- Check clearance around condenser
(See Submittals)
- Chilled water circuit ready to
operate, filled with water, pressure
test carried out and air purged.
- Chilled water circuit must be rinsed
- Check the presence of water
strainer ahead of evaporator
- The strainers must be cleaned
after 2 hours of pumps operation
- Check the thermometers and
manometers position
- Check chilled water pumps
interconnection to control panel
- Insure that the isolation resistance
of all power supply terminals to
ground complies with standards
and regulations in force.
- Check that unit voltage and
frequency supplied match rated
input voltage and frequency
- Check that all electrical connections
are clean and sound - Check that
main power supply switch is sound.
- Check Ethylene glycol % in the
chilled water circuit if Ethylene
glycol presence is required.
- Check chilled water pressure drop
through evaporator is in
accordance with the Trane order
write-up.
- On start-up of each motor in the
system, check the direction of
rotation and operation of all the
components they drive
- Water flow control checking:
decrease the water flow and check
the electrical contact in the control
panel.
- Check that there is sufficient
demand for cooling on the day of
start-up (around 50% of nominal
load)
Start-up
Follow the instructions below to
correctly start-up the unit.
Installation and chiller inspection:
- Ensure that all the operations
above (start-up preparation), are
followed.
- Follow the instruction stuck inside
the electrical cabinet:
- Unscrew the screws securing the
isolators located under the rails
supporting the compressor.
- Put the plexiglass supplied by
Trane in front of the power terminal.
- Insure all water and refrigerant
valves are in service positions,
- Insure that the unit is not
damaged,
- Insure that sensors are properly
installed in their bulb-wells and
submerged in heat conducting
product,
- Check fixing of capillary tubes
(protection from vibration and
from wear) and insure that they
are not damaged,
- Reset all manually set control
devices,
- Check refrigerating circuits tightness
Checking and setting:
Compressors:
- Check oil level at rest. The level
should reach at least halfway up
indicator located on housing.
See fig. 9 for correct level.
Figure 9 - Compressor oil level
1. Max. oil level
2. Min. oil level
- Check fixing of capillary tubes
(protection from vibration and
from wear) and insure that they
are not damaged,
- Reset all manually set control
devices,
- Check refrigerating circuits
tightness
- Check oil acidity,
- Check electrical terminals
tightening of the motors and in the
control panel,
- Check the isolation of the motors
using a 500V DC megohmeter
which meets manufacturer's
specifications (minimum value 2
meghoms)
- Check the direction of the rotation
using phasemeter.
Electrical power wiring:
- Check all the electrical terminals
tightening,
- Set-up compressors overload
relays,
- Set-up fan-motors overload relays,
Electrical control wiring:
- Check all the electrical terminals
tightening,
- Check all the pressostats,
- Check and set-up the CH530
control
- Test and start-up without the
electrical power.
Condenser:
- Check setting of the safety
pressure valve,
- Check direction of the rotation of
fans,
- Check the isolation of the motors
using a 500V DC megohmeter
which meets manufacturer's
specifications (minimum value 2
meghoms)
Operating parameters statement:
- Switch on main power supply
switch,
- Start the water pump(s),
- Start up the unit with CH530 by
pushing "Auto".
The unit and the chilled water
pumps contactor must be connected
together,
- After unit start up, leave in
operation for at least 15 minutes,
to insure pressures are stabilized.
Then check:
- voltage,
- compressors and fan-motors
currents,
- leaving and return chilled water
temperature,
- suction temperature and pressure,
- ambient air temperature,
- blowing air temperature,
- discharge pressure and temperature.
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14 CGCL-SVX01B-E4