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18 SYSTEM WATER CONTENT
MINIMUM SYSTEM WATER CONTENT
For correct unit operation, there must be a suitable amount of water in the system. A sufficient quantity of water not only ensures machine stability, but also helps avoid a high
number of hourly compressor start-ups.
To calculate it, use the formula: Unit rated cooling capacity (kW) x table value (l/kW) = Minimum system content (l).
Size
0800 0900 1000 1100 1200 1400 1600 1805 2006 2206 2406 2600 2800 3000 3200 3400 3600
Minimum system water content
Application for ambient comfort
°,A,E,L,N,U
l/kW
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
4,0
Process chiller application
°,A,E,L,N,U
l/kW
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
8,0
Note
: the water content referred to in the tables corresponds to the amount of water effectively useful for inertial purposes; this value does not necessarily coincide with the
entire system water content, and must be calculated on the basis of the system layout and operating modes.
A example is given below, but it does not cover a possible situation.
Example
: for a chiller/heat pump equipped with a primary and a secondary circuit, and in which the zone pumps of the secondary circuit could (even occasionally) be turned
off, only the water content of the primary circuit has value of useful water content for the counting purposes.
If you are in any doubt, please refer to the relevant technical documentation or contact the AERMEC Technical-Commercial Service.
ATTENTION It is recommended to design systems with high water content (minimum recommended values shown in tab), in order to limit:
—
Number of peaks made by the compressors
—
The reduction of water temperature during defrosting cycles in the winter period for heat pumps.
MAXIMUM SYSTEM WATER CONTENT
Units with the hydronic kit mounted come standard with the expansion vessel set at 1.5 bar, the pressure relief valve and the water filter mounted.
The maximum system water content depends on the capacity of the expansion vessel and on the calibration of the pressure relief valve.
Size
0800 0900 1000 1100 1200 1400 1600 1805 2006 2206 2406 2600 2800 3000 3200 3400 3600
INTEGRATED HYDRONIC KIT: 00
Hydronic kit
Expansion vessel number
°,A,E,L,N,U
no.
/
Expansion vessel capacity
°,A,E,L,N,U
l
/
Storage tank number
°,A,E,L,N,U
no.
/
Storage tank capacity
°,A,E,L,N,U
l
/
Pressure relief valve
°,A,E,L,N,U
n°/bar
/
INTEGRATED HYDRONIC KIT: AA, AB, AC, AD, AE, AF, AG, AH, AI, BA, BB, BC, BD, BE, BF, BG, BH, BI
Hydronic kit
Expansion vessel number
°
no.
2
2
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
A,L
no.
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
E,U
no.
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
N
no.
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3
3
3
Expansion vessel capacity
°,A,E,L,N,U
l
24
Storage tank number
°,A,E,L,N,U
no.
1
Storage tank capacity
°
l
600
600
600
600
600
600
600
600
600
600
600
600
1200 1200 1200 1200 1200
A,L
l
600
600
600
600
600
600
600
600
600
600
1200 1200 1200 1200 1200 1200 1200
E,U
l
600
600
600
600
600
600
600
1200 1200 1200 1200 1200 1200 1200 1200 1200 1200
N
l
600
600
600
600
600
600
1200 1200 1200 1200 1200 1200 1200 1200 1200 1200 1200
Pressure relief valve
°,A,E,L,N,U
n°/bar
1/6 bar
INTEGRATED HYDRONIC KIT: AJ, BJ
Hydronic kit
Expansion vessel number
°,A,E,L,N,U
no.
Contact the factory
Expansion vessel capacity
°,A,E,L,N,U
l
Contact the factory
Storage tank number
°,A,E,L,N,U
no.
Contact the factory
Storage tank capacity
°,A,E,L,N,U
l
Contact the factory
Pressure relief valve
°,A,E,L,N,U
n°/bar
Contact the factory
INTEGRATED HYDRONIC KIT: DA, DB, DC, DD, DE, DF, DG, DH, DI, PA, PB, PC, PD, PE, PF, PG, PH, PI
Hydronic kit
Expansion vessel number
°,A,E,L,N,U
no.
2
Expansion vessel capacity
°,A,E,L,N,U
l
24
Storage tank number
°,A,E,L,N,U
no.
/
Storage tank capacity
°,A,E,L,N,U
l
/
Pressure relief valve
°,A,E,L,N,U
n°/bar
1/6 bar
INTEGRATED HYDRONIC KIT: DJ, PJ
Hydronic kit
Expansion vessel number
°,A,E,L,N,U
no.
Contact the factory
Expansion vessel capacity
°,A,E,L,N,U
l
Contact the factory
Storage tank number
°,A,E,L,N,U
no.
/
Storage tank capacity
°,A,E,L,N,U
l
/
Pressure relief valve
°,A,E,L,N,U
n°/bar
Contact the factory
