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Section 3 3-16 ThermoFlex Thermo Scientific F acility W ater Maximum Inlet Pressure must not exceed 150 PSIG. F acility W ater Maximum Pressure Dif fer ential must not exceed 50 PSID . (Pressure Differential = Inlet Press…

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Section 3
ThermoFlex 3-15
Thermo Scientific
Facility Water
Quality and
Standards
(water-cooled
chillers)
Facility Water Permissible (PPM) Desirable (PPM)
Microbiologicals
(algae, bacteria, fungi) 0 0
Inorganic Chemicals
Calcium <40 <0.6
Chloride <250 <25
Copper <1.3 <1.0
0.020 ppm if fluid in contact with aluminum
Iron <0.3 <0.1
Lead <0.015 0
Magnesium <12 <0.1
Manganese <0.05 <0.03
Nitrates\Nitrites <10 as N 0
Potassium <20 <0.3
Silicate <25 <1.0
Sodium <20 <0.3
Sulfate <250 <50
Hardness <17 <0.05
Total Dissolved Solids <50 <10
Note A corrosion inhibitor is recommended if mixed metals are in the
facility water loop.
other levels over-time.) Do not use untreated tap water as the total ionized
solids level may be too high. This will reduce the electrolytic potential of
the water and prevent or reduce the galvanic corrosion observed.
Section 3
3-16 ThermoFlex
Thermo Scientific
Facility Water Maximum Inlet Pressure must not exceed 150 PSIG.
Facility Water Maximum Pressure Differential must not exceed
50 PSID.
(Pressure Differential = Inlet Pressure - Outlet Pressure)
Note Before using facility water that is above 35°C contact Thermo Fisher
Scientic.
The facility water must meet the following conditions for the chiller to
maintain its full rated capacity.
Facility Water
Requirements
(water-cooled
chillers)
Facility Pressure Drop PSID
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Facility Flow - GPM
Facility Temperature °C
45
40
35
30
25
20
15
10
5
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
°C
PSID
ThermoFlex1400
Example:
Follow the lines.
Start with a known, e.g., facility water
temperature.
A - go across to temperature curve
B - drop down to determine the minimum
required facility ow.
C - Where B crosses the PSID curve, go
across to determine the minimum required
PSID.
A
B
C
Facility Temperature °C
45
40
35
30
25
20
15
10
5
2 4 6 8 10
Facility Flow - GPM
Facility Pressure Drop PSID
45
40
35
30
25
20
15
10
5
°C
PSID
ThermoFlex3500/5000
A
B
C
Example: See above.
Facility Pressure Drop PSID
2 4 6 8
Facility Flow - GPM
Facility Temperature °C
45
40
35
30
25
20
15
10
5
30
25
20
15
10
5
°C
PSID
ThermoFlex2500
A
B
C
Example: See above.
CAUTION
Section 3
ThermoFlex 3-17
Thermo Scientific
ThermoFlex24000
Example:
Follow the lines.
Start with a known, e.g., facility water temperature.
A - go across to temperature curve
B - go down or up to determine the minimum
required facility ow.
C - Where B crosses the PSID curve, go across to
determine the minimum required PSID.
Facility Temperature °C
40
35
30
25
20
15
10
5
5 10 15 20 25 30
Facility Flow - GPM
Facility Pressure Drop PSID
Facility Pressure Drop PSID
30
25
20
15
10
5
PSID
A
B
C
°C
ThermoFlex15000/20000
Example: See below.
5 10 15 20
Facility Flow - GPM
°C
PSID
ThermoFlex7500/10000
Example: See below.
A
B
C
Facility Temperature °C Facility Temperature °C
40
35
30
25
20
15
10
5
40
35
30
25
20
15
10
5
5 10 15 20 25 30
Facility Flow - GPM
Facility Pressure Drop PSID
30
25
20
15
10
5
30
25
20
15
10
5
PSID
A
B
C
°C