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 significant 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 fulfil 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 fluid 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.
74
Содержание 30RB-170R
Страница 2: ......
Страница 51: ...11 13 Fan arrangement 11 MAIN COMPONENTS OF THE UNIT AND OPERATING CHARACTERISTICS 51...
Страница 90: ......
Страница 91: ......
