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30RB/30RQ - 30RBY
Table III: Pressure switch settings
High pressure switch (017 to 033)
High pressure switch (040)
CAUTION: Alteration of factory settings other than the design set-point,
without manufacturer's authorisation, may void the warranty.
In case of use other than the manufacturer configuration, Carrier Service
must be asked for permission to change the Pro-Dialog + system
configuration.
Operating limits 30RB
These units have been designed to operate within the following limits:
Evaporator
Water entering temp. (at start-up)
Water leaving temp. (in operation)
Condenser
Air entering temperature
Operating limits 30RQ
Cooling cycle
Plate heat exchanger
Water entering temp. (at start-up)
Water leaving temp. (in operation)
Coil:
Air entering temperature
Heating cycle
Plate heat exchanger
Water entering temp. (at start-up)
Water leaving temp. (in operation)
Coil:
Plate heat exchanger
Contact Carrier if an entering water temperature lower than 7.8 °C is necessary.
*
** For low-temperature applications, where the leaving water temperature is below
5°C, a frost protection solution must be used.
*** -13°C for units size 40kW.
19
Minimum and maximum water flow rates in the
plate heat exchangers
Cut-out
Reset
44 bar
Manual
30RB/RBY
44.2 bar
Automatic
30RQ
Minimum °C Maximum °C
7.8*
30
5**
18
-10
48
(1) Only 30RBY17-33
(2) Maximum flow rate at an available pressure of 50kPa (unit with hydraulic module).
(3) Maximum flow rate at pressure drop of 100kPa in the plate heat exhcanger (unit
Water circuit water content
Minimum °C Maximum °C
Whatever the size of the system, the minimum content of the water circuit
7.8*
30
is given by the following formula:
5**
18
Content = CAP
-10
48
where CAP is the nominal system capacity (kW) at nominal operating
conditions of the installation.
Minimum °C Maximum °C
Application
10
45
Air conditioning
20
50
Minimum °C Maximum °C
Industrial process cooling
-15***
40
The water content is necessary to ensure the stability of plant operation
and accurate temperature control.
It is often necessary to add a buffer water tank to the circuit in order to
achieve the required volume.
NOTE:
For industrial process cooling applications, where high stability of
water temperature levels must be achieved, the values above must
be increased.
We recommend consulting the factory for these particular
applications.
Minimum flow rate, l/s Maximum flow rate
(1)
l/s
17
0,4
21
0,47
26
0,63
33
0,82
40
0,99
Minimum flow rate, l/s Maximum flow rate
l/s
17
0,45
21
0,57
26
0,67
33
0,87
40
1,05
without hydraulic module).
x N = Litres
(kW)
,
Maximum flow rate
,
(2)
(3)
l/s
1,39
1,26
1,52
1,42
1,96
1,43
2,18
1,72
2,6
2,7
(2)
,
Maximum flow rate
(3)
,
l/s
1,39
1,26
1,52
1,42
2,18
1,72
2,29
1,85
2,6
2,7
N
3.5
See note
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