15
The 30HXC 080-375 units for high condensing temperatures
are directly derived from the standard models. Their appli-
cation range is the same as that of the standard units, but
permits operation at condenser leaving water temperatures
up to 63°C. The PRO-DIALOG control offers all the advan-
tages of the standard units, plus control of the condenser
leaving water temperature.
The main modifications are:
• Use of 30GX compressors (example: 06NA2300S5N
instead of 06NW 2300S5N).
• Modification of electrical components to operate with
compressors for high condensing temperatures.
• Modification of heat exchangers to meet pressure code
requirements (if necessary).
Option 150
These units are designed for traditional applications for
water-cooled units, but for higher condender leaving water
temperatures than 50°C.
Like the standard units they are equipped with condenser
entering and leaving water sensors.
It is possible to control the machine at the condenser water
outlet, requiring a factory configuration change and the
use of a heating/cooling inlet reversing device.
Option 150A
These units are designed for water-to-water heat pumps.
They are factory configured as heat pumps (heating/cooling
control as a function of the remote reversing device). The
condenser incorporates thermal insulation that is identical
to that of the evaporator.
Technical information
All information is identical to that of the standard 30HXC
units, except for the following paragraphs.
Selection
There are no nominal conditions for this unit type. The
selection is made using the current electronic catalogue.
Dimensions
These are identical to those of the standard 30HXC units.
The only difference is in the diameter of the incoming field
wiring connection, described in the chapter “Recommended
selection”. Refer to the dimensional drawings for these
units, before proceeding with the wiring.
Compressor
See table in chapter 5.3.
Options and accessories
All options available for the standard 30HXC units are com-
patible, except low-temperature option 5 for the evaporator
available in the special unit.
ATTENTION: If units have two different operating modes
- one with high condensing temperature and the other with
low condensing temperature - and the transition is made
with the unit in operation, the temperature must not vary
by more than 3 K per minute. In cases where this is not
possible, it is recommended to go through a unit start/stop
switch (remote start/stop available for standard units).
The 30HXC units with the very low temperature option
are directly derived from the 30HXC models equipped
with the high condensing temperature option (option 150).
Unit sizes available with the very low temperature option
are the following: 30HXC 090, 110, 130, 155, 175, 200, 230,
260, 310, 345.
Their application range allows the production of glycol/
water solution down to -10°C with ethylene glycol at 35%
(by weight) or down to -7°C with propylene glycol at 30%
(by weight). The precision of these amounts is critical for
correct unit operation.
In addition to the ones already listed for the high condensing
temperature option (see chapter 4.4) the main modifications
are:
• the evaporator is equipped with reinforced thermal
38 mm insulation,
• the electronic expansion valves are changed,
• the use of a wide-band oil differential sensor.
All technical data is the same as for the 30HXC units with
option 150 except for the following chapters:
4.5.1 - Options and accessories
The options available for the 30HXC units equipped with
the very low temperature option are as follows: 20, 22, 60,
61, 84, 84D, 84R, 92, 104A, 107, 107A, 152, 193, 194, 197, 199.
4.5.2 - Operating range, 30HXC units with very low
temperature option
Evaporator entering water temperature -7.2 21
Evaporator leaving water temperature -10 15
Evaporator entering water temperature -4.2 21
Evaporator leaving water temperature -7 15
Condenser entering water temperature 20 50
Condenser leaving water temperature 25 55
Outdoor air temperature 6 40
For very low temperature applications the anti-freeze
solution is critical for correct unit operation. The following
amounts (by weight) are required:
25 27
28 30
30 NA
33 NA
35 NA
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