Brooks Polycold MaxCool Series - Cooling Water Requirements

Specifications and Site Preparation Polycold Cryochiller
Cooling Water Installation and Operation Manual
Brooks Automation
3-6 214072 Revision B
Cooling Water
The cooling water supplied to the Cryochiller must meet temperature, flow, and purity requirements.
• Cooling water temperature must be between 13 – 38° C (55 – 100° F).
• Minimum flow rates and water temperatures are shown in Table 3-6.
• Purity requirements are shown in Table 3-7.
Minimum water flow rates are based on requirements to effectively remove heat from the cryochiller
and to reduce risk for scale and corrosion of the condenser. Flow rates below the published minimum
required flow rate can result in scale and corrosion since the risk for these conditions increases with
lower water flow rates and higher outlet water temperatures.
Condenser failures or unit performance issues that occur on units operating at water flow rates that are
lower than the minimum required flow rate in Table 3-6 are not covered by warranty.
Allow for cooling water temperature rise during the summer months.
User is advised to add a filter to the cooling water to remove dirt and abrasives. 100 micron filter is rec-
ommended. Chemical impurities in the cooling water must be compatible with copper. See Table 3-7.
Cooling water recommendations:
• Install a user-supplied filter that can be quickly purged of accumulated sediment by purging
water from the filter, or install two parallel redundant user-supplied water filters with individual
input and output shut off valves to allow for continuous operation during maintenance by divert-
ing water to the opposite filter.
• Install a water flow rate meter in the input water line to monitor water flow.
Table 3-6: Water Flow and Inlet Water Temperature
NOTE:
1
Pressure Drop values assume a 3/4-inch (20 mm) standard pipe size.
Maximum working pressure of the unit’s cooling water circuit is 1380 kPa (200 psig).
Refrigeration
Unit
Water
Inlet Temperature
°C (°F)
Minimum
Required
Flow Rate
L/min (gpm)
Maximum
Allowable
Flow Rate
L/min (gpm)
Internal
Pressure Drop
kPa (Psi)
Pressure Drop
in Supply
Line
1
kPa/m (Psi/ft)
Heat Rejection
kW
(Btu/Hour)
MaxCool
4000H
13 (55) – Min.
13.6 (3.6) 145 (38.3)
6.9 (1) No data 23.2 (79,232)
18 (65)
18.2 (4.8) 145 (38.3)
10.3 (1.5) No data 23.2 (79,232)
24 (75)
27.3 (7.2) 145 (38.3)
20.7 (3) No data 23.2 (79,232)
29 (85)
54.1 (14.3) 145 (38.3)
77.2 (11.2) 3.4 (0.15) 23.2 (79,232)
38 (100) – Max.
54.1 (14.3) 145 (38.3)
77.2 (11.2) 3.4 (0.15) 23.2 (79,232)
MaxCool
2500L
13 (55) – Min.
13.6 (3.6) 145 (38.3)
6.9 (1) No data 21.7 (74,109)
18 (65)
18.2 (4.8) 145 (38.3)
10.3 (1.5) No data 21.7 (74,109)
24 (75)
27.3 (7.2) 145 (38.3)
20.7 (3) No data 21.7 (74,109)
29 (85)
54.1 (14.3) 145 (38.3)
77.2 (11.2) 3.4 (0.15) 21.7 (74,109)
38 (100) – Max.
54.1 (14.3) 145 (38.3)
77.2 (11.2) 3.4 (0.15) 21.7 (74,109)