Operating instructions
11
The ICVC software version number of your 19XR unit
will be located on the ICVC module.
Information on the unit control is not included in this
manual. Refer to separate controls manual.
All information given on unit-mounted starters refers to
star-delta connected starters. Electronic starters have
separate documentation.
2.3.1 - Chiller information plate
The information plate is located below the control box.
2.3.2 - System components
The components include the cooler and condenser heat
exchangers in separate vessels, motor-compressor, lubrica-
tion package, control centre, and motor starter. All connec-
tions from pressure vessels have external threads to enable
each component to be pressure tested with a threaded pipe
cap during factory assembly.
2.3.2.1 - Cooler
This heat exchanger (also known as the evaporator) is
located underneath the compressor. It is maintained at
lower temperature/pressure so that evaporating refrigerant
can remove heat from water flowing through its internal
tubes.
2.3.2.2 - Condenser
The condenser operates at a higher temperature/pressure
than the cooler and has water flowing through its internal
tubes in order to remove heat from the refrigerant.
2.3.2.3 - Motor-compressor
This component maintains system temperature/pressure
differences and moves the heat carrying refrigerant from
the cooler to the condenser.
(unit reference given an an example)
19XR or 19XV (19XRV)
- 6 sizes
- 3 lengths
- 6 sizes
- 3 lengths
- 4 sizes (2-3-4-5)
- 6 sizes
- 3 lengths
- 6 sizes
- 3 lengths
S: Standard
H: High-eciency
2.3.2.4 - Control equipment
This includes circuits and automatic controls designed to
control and manage the unit, in order to adjust the capacity
as required to maintain proper leaving chilled water
temperature. It includes the following functions:
• Capture of sensor signals in the machine: pressures,
temperatures, status returns etc.
• Machine actuator control.
• Man-machine interface to read status parameters,
configuration parameters etc.
• Remote unit control and status reporting: via
dedicated signals or by bus (CCN).
The control equipment can be installed in a dedicated box
or integrated in the starter cabinet.
2.3.2.5 - Power equipment
Standard 19XR units include circuits and devices designed
to ensure lubrication.
19XR unit options
An electronic starter allows start-up and compressor motor
power supply interruption. It is factory-installed in the unit
in a cabinet that also includes the control equipment and
the protection and power transmission elements.
Standard equipment for 19XRV units
A variable-frequency drive allows start-up and compressor
motor power supply interruption. It also allows adjustment
of the compressor speed based on the required capacity. It
is factory-installed in the unit in a cabinet that also includes
the control equipment and the protection and power
transmission elements.
2.3.2.6 - 19XR Storage vessel (optional)
There are two sizes of storage vessel available. The vessels
have relief valves, a drain valve and a male flare vapour
connection for the pumpout unit.
NOTE: If a storage vessel is not used at the jobsite, factory-
installed isolation valves on the chiller may be used to
isolate the chiller charge in either the cooler or condenser.
In this case a separate pumpout unit is used.