©2009McQuay
17
Limit to the water volume of the chiller
Vmin is referred to the below table：
Item Model
Setting EWT(℃)
Vmin(l)
14 151
13 188
12 251
11 376
1 MAC060D4
10 753
14 86
13 99
12 117
11 143
2 MAC090D4
10 184
14 96
13 111
12 131
11 160
3 MAC120D4
10 206
Notice：
1. The total water volume of the entire hydraulic system includes the water in main pipe, water tank
and terminal equipment, in which the 2-way valve is open.
2. If the water volume (V) while the unit is running is less than Vmin, it's recommended to install a
water tank of (Vmin-V)L, or it will cause the unit frequent ON/OFF
3. The Vmin in the table is calculated based on nominal cooling water flow and 5℃ anti-freeze. If the
water flow and anti-freeze temperature change, related Vmin will change.
4. The table is applied for the water volume selection of normal chiller, not for the chiller under low
leaving water temperature with glycol.
If the system water volume is less than required water volume (Vmin) while the chiller is operating, it
will result in frequent ON/OFF
Caution
!
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