Carrier 30XW - 24 And 230 V Power Reserve for the User; 6 Application Data; Operating Limits for 30 XW Units; Minimum Chilled Water Flow

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
The minimum chilled water ow is shown in the table in
chapter 6.6.
If the system ow is less than the minimum unit ow rate,
the evaporator ow can be recirculated, as shown in the
diagram.


1. Evaporator
2. Recirculation

The maximum chilled water ow is limited by the permitted
pressure drop in the evaporator. It is provided in the table
in chapter 6.6.
• Select the option with one water pass less that will
allow a higher maximum water ow rate (see option
100C in the table in chapter 6.5).
• Bypass the evaporator as shown in the diagram to
obtain a lower evaporator ow rate.


1. Evaporator
2. Bypass
Evaporatorleavingwatertemperature,°C
Condenserleavingwatertemperature,°C

The minimum and maximum condenser water ow rates
are shown in the table in chapter 6.6.
If the system ow is higher than the maximum unit ow
rate, select the option with one pass less that will allow a
higher maximum water ow rate. Please refer to option
102C in the table in chapter 6.5.
15
20
25
30
35
40
45
50
55
0510 15 20
 Fromapprox.45%tofullload
 Partloadlimitapprox.35%
 Minimumloadlimitapprox.15%

Control circuit reserve:
After all required options have been connected, the TC
transformer includes a power reserve that can be used for
the eld control wiring:
• Unit without option 084* 2 A (24 V a.c.) or 48 VA
• Unit with option 084* 1.3 A (24 V a.c.) or 30 VA
* 084 or 084R or 084D
As an option, a the 230 V, 50 Hz circuit allows the supply of
a battery charger for a portable computer at 1 A maximum
at 230 V. The connection is via a CEE7/7 type socket (2
poles with earth) located under the control box and
accessible from outside.


30XW--/30XW-P  

Entering temperature at start-up - 35.0°C
Leaving temperature during operation 3.3°C* 20.0°C
Entering/leavingtemperaturedierenceatfullload 2.8K 11.1K

Entering temperature at start-up 13.0°C** -
Leaving temperature during operation 19.0°C** 50.0°C***
Entering/leavingtemperaturedierenceatfullload 2.8K 11.1K
* For low-temperature applications, where the leaving water temperature is
below3.3°C,afrostprotectionsolutionmustbeused.Pleaserefertooption5
andoption6.
** Forlowercondensertemperaturesawaterowcontrolvalvemustbeusedat
thecondenser(twoorthree-wayvalve).Pleaserefertooption152toensure
thecorrectcondensingtemperature.
*** Please refer to option 150 for applications with a high condenser leaving
temperature(upto63°C).
Ambienttemperatures:Theseunitsarededicatedforindoorenvironment.
Theexternaltemperatureatchillerstartupshouldbeatleast5°C.Forsuchlow
ambient,option152isrecommended.Duringstorageandtransportofthe30XW
units(includingbycontainer)theminimumandmaximumpermissibletemperatures
are-20°Cand72°C(and65°Cforoption200).
Formoreprecisedetailsrefertotheunitselectionprogram.
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