Carrier 19PV550, Installation, Operation And Maintenance Instructions

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6 - APPLICATION DATA
6.5 - Standard and optional number of water passes
19PV 550 720 800 900 1010 1180 1300 1450 1600
Evaporator
Standard 2 2 2 2 2 2 2 2 2
Evaporator with option 100C 1 1 1 1 1 1 1 1 1
Condenser
Standard 2 2 2 2 2 2 2 2 2
Condenser with option 102C 1 1 1 1 1 1 1 1 1
6.6 - Min water volume and evaporator & condenser water flow rates
These below values are given for standard units. For Evaporator and condenser with option 100C/102C, please refer to the unit
selection program.
19PV 550 720 800 900 1010 1180 1300 1450 1600
Minimum installation volume (l)
Air conditioning application 1770 2310 2570 2890 3240 3790 4170 4640 5130
Industrial process application 3530 4620 5140 5780 6480 7570 8330 9290 10250
Evaporator water flow rate, (m
3
/h)
Minimum
(1)
34 34 34 34 61 61 61 61 61
Maximum
(3)
179 235 257 281 289 286 295 295 329
Condenser water flow rate, (m
3
/h)
Minimum
(2)
21 21 36 36 36 36 36 36 36
Maximum
(3)
245 299 346 486 457 454 428 594 526
(1) Minimum evaporator flow rate based on a water velocity of 0,5 m/s.
(2) Minimum condenser flow rate based on a water velocity of 0,3 m/s.
(3) Maximum flow rate based on a pressure drop of 120 kPa (units with two evaporator passes and two condenser passes).
This volume is necessary for stable operation.
It is often necessary to add a buffer water tank to the circuit in order
to achieve the required volume. The tank must itself be internally
baffled in order to ensure proper mixing of the liquid (water or
brine). Refer to the examples below.
Connection to a buffer tank
Bad
Bad
Good
Good
6.7 - Variable flow evaporator
Variable evaporator flow can be used. The controlled flow rate
must be higher than the minimum flow given in the table of
permissible flow rates and must not vary by more than 10% per
minute.
If the flow rate changes more rapidly, the system should contain
a minimum of 6.5 litres of water per kW instead of 3.25 l/kW.