Maintaining The Water-To-Water Heat Exchanger Cooling System (Closed Loop) - Honeywell Precision Platform 4022 Series System Manual

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9.10.1.2.
9-52
• Check the head temperatures on the User Station daily. Methods
for correcting head temperature problems are described in
Subsection 9.9.4.2.
• Check the water pressure and flow rate daily.
• Pressure: 2-4 Bar (30-60 psig)
• Flow Rate: 8 l /min (2 gal/min) maximum.
A particular concern for the open loop system is system blockage due to
quality of the supply water. If blockage is suspected, test as instructed in
Subsection 9.9.4.2.
Maintaining the water-to-water heat exchanger cooling
system (closed loop)
These checks are required to maintain the water-to-water heat exchanger
cooling system.
• Check the fluid level in the expansion tank, and fill with 50/50
glycol/water mix as required to keep the tank 3/4 full. To prolong
the anti-rust, corrosion, scale, and heat transfer properties of the
coolant mixture, an additive 6530220027 EXTENDER, COOLANT
HD ANTIFREEZE is required after three years of operation. The
additive is to be added in a ratio of 45:1 with the capacity of the
cooling system. The cooling system must be flushed and filled after
five years of operation.
• Check the motor and pump to ensure that they are operating
efficiently.
• Secondary cooling system maintenance:
• Check the Water-to-Water Heat Exchanger unit for corrosion
and leakage on the tube side of the unit.
• Check the modulating control valve on the exchanger unit for
leakage and corrosion.
• If performance of the exchanger unit degrades significantly, the
tube side of the Water-to-Water Heat Exchanger may have
10/18/07
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