Carrier 30RBP-550R - Page 74

12 - OPTIONS
12.2.8 - TOTAL/PARTIAL FREE COOLING (Option 305A; 305B)
Reducing operating costs and protecting the environment have become the key concerns, both for air conditioning applications,
and for industrial processes and cooling data centres.
The free cooling option allows signicant energy savings to be made in all applications that require cooling throughout the year,
particularly when used in colder climates. In these regions, free cooling can be used to full a large proportion of the cooling requirements
both economically and in a way that respects the environment.
Operating principle
When the outdoor air temperature is lower than the setpoint temperature, the free cooling hydraulic system can be used to cool the
customer loop by allowing uid to circulate in the micro-channel coils, positioned in parallel with the MCHE condensers. With this type
of operation, it is possible to save energy when outdoor temperatures are low.
Hydraulic free cooling is available as 2 options:
- 305A: Total hydraulic free cooling: the FC coils are built into each condenser on two refrigerating circuits.
- 305B: Partial hydraulic free cooling: the FC coils are built into the condensers on a single refrigerating circuit.
12.2.8.1 - Physical characteristics of units with total and partial free cooling
30RBP 170R 190R 210R 230R 270R 310R 340R 380R 410R 450R
Free cooling coil All-aluminium micro-channel coils (MCHE)
Quantity 3 4 4 4 4 5 5 6 6 7
Hydraulic connection
Connection in 3" 3" 3" 3" 3" 4" 4" 4" 4" 4"
External diameter mm 88,9 88,9 88,9 88,9 88,9 114,3 114,3 114,3 114,3 114,3
Additional water volume l 60 72 72 72 72 113 113 126 126 200
Weight
(1)
Additional weight (without water) kg 225 266 266 266 266 357 359 395 397 516
Additional weight (during operation) kg 287 341 341 341 341 475 477 526 528 725
Operation
Max. operating pressure, water side bar 6 6 6 6 6 6 6 6 6 6
Partial Free Cooling - Option 305B
Free cooling coil All-aluminium micro-channel coils (MCHE)
Quantity 2 2 2 2 2 2 2 3 3 3
Hydraulic connection
Connection in 3" 3" 3" 3" 3" 4" 4" 4" 4" 4"
External diameter mm 88,9 88,9 88,9 88,9 88,9 114,3 114,3 114,3 114,3 114,3
Additional water volume l 48 48 48 48 48 58 58 75 75 101
Weight
(1)
Additional weight (without water) kg 179 179 179 179 179 210 212 249 251 304
Additional weight (during operation) kg 228 228 228 228 228 271 273 327 329 409
Operation
Max. operating pressure, water side bar 6 6 6 6 6 6 6 6 6 6
30RBP 480R 550R 610R 670R 720R 770R 800R 870R 950R
Free cooling coil All-aluminium micro-channel coils (MCHE)
Quantity 7 8 9 10 10 11 11 12 12
Hydraulic connection
Connection in 4" 4" 5" 5" 5" 5" 5" 5" 5"
External diameter mm 114,3 114,3 139,7 139,7 139,7 139,7 139,7 139,7 139,7
Additional water volume l 200 213 298 310 310 351 351 364 364
Weight
(1)
Additional weight (without water) kg 516 556 663 697 697 772 772 810 810
Additional weight (during operation) kg 725 778 973 1020 1020 1138 1138 1189 1189
Operation
Max. operating pressure, water side bar 6 6 6 6 6 6 6 6 6
Partial Free Cooling - Option 305B
Free cooling coil All-aluminium micro-channel coils (MCHE)
Quantity 3 4 4 5 5 5 5 6 6
Hydraulic connection
Connection in 4" 4" 5" 5" 5" 5" 5" 5" 5"
External diameter mm 114,3 114,3 139,7 139,7 139,7 139,7 139,7 139,7 139,7
Additional water volume l 101 120 186 198 198 205 205 224 224
Weight
(1)
Additional weight (without water) kg 304 346 412 449 449 457 457 494 494
Additional weight (during operation) kg 409 471 606 656 656 671 671 728 728
Operation
Max. operating pressure, water side bar 6 6 6 6 6 6 6 6 6
(1) Values are guidelines only. Refer to the unit name plate.
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