Carrier 30RB Series - Operating Limits and Troubleshooting; Operating Limits and Range

30RB/30RQ
GB - 13
ENGLISH
Unit protection devices , operating limits and operating range
Table III: Pressure switch settings
Cut-out Reset
High pressurestat 42 bar Manual
WARNING: 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 con guration, Carrier Service
must be asked
for permission to change the Pro-Dialog + system
con guration.
30RB - Operating limits
These units have been designed to operate within the following limits:
Evaporator Minimum°C Maximum°C
Water entering temp. (at start-up) 7,8* 30
Water leaving temp. (in operation) 5** 18
Condenser
Air entering temperature -10 48
30RQ - Operating limits
Cooling cycle
Plate heat exchanger Minimum°C Maximum°C
Water entering temp. (at start-up) 7.8* 30
Water leaving temp. (in operation) 5** 18
Coil
Air entering temperature -10 48
Heating cycle
Plate heat exchanger Minimum°C Maximum°C
Water entering temp. (at start-up) 10 45
Water leaving temp. (in operation) 20 50
Coil Minimum°C Maximum°C
Air entering temperature -15 40
*
Contact Carrier if an entering water temperature lower than 7.8 °C is
necessary.
**
In case of operation with a leaving temperature of less than 5 °C, it is
necessary to add glycol to the water in circulation.
Minimum and maximum water  ow rates in the
plate heat exchangers
* Maximum water  ow rate with an available static pressure of 50 kPa (units with
hydronicmodule)
** Maximum water  ow rate at a plate heat exchanger pressure drop of
100 kPa (units without hydronic module)
Water circuit water content
Whatever the size of the system, the minimum content of the water
circuit is given by the following formula:
Volume = CAP
(kW)
x N = Litres
where CAP is the nominal system capacity (kW) at nominal operating
conditions of the installation.
Application N
Air conditioning 2,5
Industrial process cooling See note
This volume is necessary for stable operation and accurate temperature
control.
It is often necessary to add a bu er 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.
Operating range - 30RB units
Notes:
Operating range with anti-freeze solution and with special con guration
of the Pro-Dialog control system.
-12
-7
-2
3
8
13
18
23
28
33
38
43
48
53
-4-2 0 2 4 6 8 1012141618202224
-20
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
15 20 25 30 35 40 45 50 55
-12
-7
-2
3
8
13
18
23
28
33
38
43
48
53
-4-2 0 2 4 6 8 101214161820 2224
Operating range - 30RQ units
Outdoor air temperature °C
Leaving water temperature °C
Outdoor air temperature °C
Leaving water temperature °C
Outdoor air temperature °C
Leaving water temperature °C
Minimum  ow rate,
l/s
Maximum  ow rate,
l/s*
Maximum  ow rate,
l/s**
30RB-RQ017 0,45 1,4 1,3
30RB-RQ021 0,57 1,6 1,5
30RB026 0,67 2 1,5
30RQ026 0,67 2,2 1,8
30RB033 0,87 2,2 1,8
30RQ033 0,87 2,3 1,9