Carrier 30RA040B, Руководство пользователя

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14
6 - APPLICATION DATA
6.1 - Unit operating range
Evaporator Minimum °C Maximum °C
Water entering temp. (at start-up) 7.8 * 30
Water leaving temp. (in operation) 5 ** 15
Water entering temp. (at shut down) - 55
Condenser
Entering air temp. -10*** 46***
Do not exceed the maximum operating temperature.
* For a system requiring operation below 7,8°C, contact Carrier SA.
** For a system requiring operation below 5°C, anti-freeze must be added to the
unit.
*** Maximum outside temperature: For transport and storage of the 30RA units
the minimum and maximum allowable temperatures are –20°C and +55°C. It
is recommended that these temperatures are used for transport by container.
6.2 - Evaporator water flow rates
30RA Evaporator water flow
Min. flow rate Max. flow rate* Max. flow rate**
Single pump Dual pump
l/s l/s l/s l/s
040 1.1 3.5 4.4 3.7
050 1.1 4 5.2 4.6
060 1.4 4.4 6 5.8
070 1.5 4.6 6.4 6.4
080 1.7 5.5 6.8 7.3
090 2.7 5.6 6.9 7.6
100 3 5.8 7.4 8.8
120 3.6 8.5 10.5 10.8
140 4.2 8.8 11.4 12.7
160 4.8 9.1 11.9 14.4
200 5.6 15.3 15.3 19.1
240 6.8 23.4 23.4 24.2
Legend
*
Maximum flow rate at an available pressure of 50 kPa (unit with hydronic
module).
** Maximum flow rate at a pressure drop of 100 kPa in the plate heat exchanger
(unit without hydronic module).
6.3 - Minimum water flow rate
If the installation flow rate is below the minimum flow rate,
recirculation of the evaporator water flow may take place,
leading to the risk of excessive fouling.
6.4 - Maximum evaporator water flow rate
This is limited by the permitted evaporator pressure drop.
Also, a minimum evaporator
∆
T of 2.8 K must be guaranteed,
which corresponds to a water flow rate of 0.9 l/s per kW.
6.5 - Water loop volume
6.5.1 - Minimum water loop volume
The minimum water loop volume, in litres, is given by the
following formula:
Volume = CAP (kW) x N* = litres, where CAP is the nominal
cooling capacity at nominal operating conditions.
Application N*
Air conditioning
30RA 040
3.5
30RA 050 to 240 2.5
Industrial process cooling
30RA 040 to 240
(See note)
NOTE: For industrial process cooling applications, where
high stability of the water temperature levels must be
achieved, the values above must be increased.
This volume is required to obtain temperature stability and
precision.
To achieve this volume, it may be necessary to add a storage
tank to the circuit. This tank should be equipped with baffles to
allow mixing of the fluid (water or brine). Please refer to the
examples below.
6.5.2 - Maximum water loop volume
Units with hydronic module incorporate an expansion tank that
limits the water loop volume. The table below gives the
maximum loop volume for pure water or ethylene glycol with
various concentrations.
30RA 040-080 30RA 090-160 30RA 200-240
(in litres) (in litres) (in litres)
Pure water 600 1500 2000
EG 10% 450 1200 1600
EG 20% 400 1000 1400
EG 35% 300 800 1000
EG: Ethylene glycol
Bad Good
Bad Good