Carrier 30KAV-ZE Series - Brine (Options 5; 6; 8)

12.2.4 - Guidelines for system installation
For the physical properties, dimensions and performances:
see the drycooler documentation.
For the electrical connections, see the electrical wiring diagram
supplied with the drycooler.
For software configuration information, refer to the control
documentation of the chiller.
For correct installation of the drycooler, the rules for calculation
and sizing relating to the following areas must be observed:
■ Sizing of the water piping;
■ Pressure drops (verify that the operating pressure of the unit
pump is su󰀩cient compared to the pipe and valve pressure
drops; check for all operating modes);
■ Maximum height for the drycooler (in relation to the unit relief
valve);
■ Suitable positioning of the temperature sensors: Outdoor air
temperature and water loop temperature.
12.2.5 - Conguration of the fan control
To set the conguration corresponding to the drycooler installed
(number of fans, control type – xed or variable speed), please
refer to the instructions in the SmartVu™ control manual. Following
these parameters, the SmartVu™ control will activate the correct
number of digital outputs to control the fans.
SmartVu™ controls automatic switching for all fans, based on the
operating time and number of start-ups, to ensure the fan motors
provide a long operating life.
Compatible fan congurations:
■ 1 to 20 fans,
■ Fixed speed or variable speed,
■ 1 or 2 rows of fans.
Refer to the drycooler wiring diagram to see the arrangement of
the fan stages.
12.3 - Brine (options 5 / 6 / 8)
Option 5 enables chilled water production down to a temperature
of -6°C.
The unit is equipped with insulation on the low pressure pipes,
new control algorithms, very low pressure sensors and an adjusted
tubes number in the evaporator.
Option 6 enables chilled water production down to a temperature
of -12°C.
The unit is equipped with insulation on the low pressure pipes,
new control algorithms, very low pressure sensors and turbulators
in the water tubes.
The operating range is based on:
■ The size of the machine,
■ The type of glycol,
■ Its concentration,
■ The ow rate,
■ The temperature of the glycol solution,
■ The condensing pressure (ambient temperature).
Refer to the e-catalogue to nd out the operating range for each
unit.
Frost protection
The low pressure and frost protection of the evaporator depend
on the antifreeze level in the water loop.
The evaporator pinch point ((leaving water temperature) -
(evaporation temperature)) and the protection against ice
formation, depend on the amount.
It is therefore crucial to check the amount of antifreeze in the loop
carefully during the initial system start-up (allow it to circulate for
30 minutes to check that the mixture is homogeneous before
sampling).
Refer to the manufacturer's data to dene the frost protection,
based on the measured concentration amount.
The minimum temperature for frost protection must be entered in
the parameters on the unit's controller.
This value will enable the following limits to be dened:
1. Evaporator antifreeze protection.
2. Low pressure protection.
For information, based on the antifreeze solutions used in our
laboratories, the protection values provided by our supplier are
as follows (these values may change depending on the supplier):
It is therefore recommended that system start-up for a low or very
low temperature installation is performed by the manufacturer.
12 - OPTIONS
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