AMETEK PLA-PLW User Manual
Page 47
Important Precautions:
1.
Models Pipe
Size
Models
18K Watts
½” NPT
24K to 36K Watts
¾” NPT
2. It is recommended that the system be check for water leaks before operation.
a. Check for water leaks by closing Water Switch – B.
b. Then opening Water Switch – A.
c. Turn the Load’s power ON and check for leaks (the power of the PLW
must be ON in order for water flow into the load).
3. Flow Meter’s inlet and outlet must be at least ¾”.
4. Install a 150-micron filter at the water inlet. (Recommend)
5. Water pressure must be less than 80 PSI in order for the valve to work
properly.
6. Never allow to flow from outlet to inlet.
7. Water temperature should be between 5
º
C and 30
º
C.
8. Use only non-corrosive type of liquid for cooling with a neutral pH level of 7.
(We suggest using distilled or de-ionized water)
9. Water viscosity must be greater than 50 CST.
Important Note: Please refer to Appendix B for Heat Sink Temperature VS. GPM Curve to help
determine the GPM level for your system
COOLANT WITH ANTI-FREEZE (GLYCOL) PRECAUTIONS
Cooling liquids containing Anti-Freeze (Glycol) will decrease the thermal efficiency of the PLW
cooling system by reducing the cooling efficiency and increasing the viscosity of the coolant. To
counteract the lowered heat dissipation, the GPM must be increased to maintain proper cooling of
the system. Please refer to table 2.5 for a detailed chart explaining the relationship between
GPM, Glycol level and Power De-rating. Increased glycol levels will affect the power handling
capability of the unit, please consult the chart carefully.
Power Derated
0%
10%
20%
30%
40%
50%
0%
1.5 GPM
10%
2 GPM
1.5 GPM
20%
2.5 GPM
2 GPM
1.5 GPM
30%
3 GPM
2.5 GPM
2 GPM
1.5 GPM
40%
3 GPM
2.5 GPM
2 GPM
1.5 GPM
G
ly
col Le
v
el
50%
3 GPM
2.5 GPM
2 GPM
1.5 GPM
GPM Level Based on PLW 6KW Model @ 15°C Cooling Liquid
2-7