13
Entering water temperature at start-up °C 6.8* 30
Leaving water temperature during operation °C 4** 10†
Entering water temperature °C 15 ‡
Leaving water temperature °C 20 45
For application requiring operation at less than 6.8°C, contact Carrier for unit
selection using the Carrier electronic catalog.
** For operation between 4°C and -15°C, the unit must be equipped with option 5
or 6, and the use of anti-freeze is required.
† For an application, requiring operation up to +15°C leaving water temperature,
contact Carrier for the selection of the unit.
‡ Depends on the maximum condenser flow rate.
Maximum outside temperature: For transport and storage of the 30HZ/HZV
units the minimum and maximum allowable temperatures are –20°C and
+50°C. It is recommended that these temperatures are used for transport by
container.
5.1.1 - Operating range 30HZ
The minimum chilled water flow is shown in the table on the
next page. If the flow is less than this, the evaporator flow
can be recirculated, as shown in the diagram. The tempera-
ture of the mixture leaving the evaporator must never be
less than 2.8 K lower than the chilled water entering tempe-
rature.
1 Evaporator
2 Recirculation
The maximum chilled water flow is limited by the maximum
permitted pressure drop in the evaporator. It is provided in
the table on the next page. If the flow exceeds the maximum
value, two solutions are possible:
• Select a non-standard evaporator (-2 baffles) which
will allow a higher maximum water flow rate.
• Bypass the evaporator as shown in the diagram to
obtain a highter temperature difference with a lower
evaporator flow rate.
1 Evaporator
2 Bypass
A 30HZ
B 30HZ with option 150 (high condensing temperature)
C 30HZ with option 5
D 30HZ with option 150 + 5
E 30HZ with option 6
1. Evaporatorandcondenser∆T=5K
Leaving evaporator water temperature °C
Leaving condenser water temperature °C
45
40
35
30
25
20
39
44
42
36
A
B
C
D
E
-15 -10 -5 0 5 10-6
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