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Controller
PID Values
CAUTION
Cleaning
CAUTION
CAUTION
Thermo Scientific
The factory preset PID values are:
Thermo Fisher recommends that only a qualified technician
change PID parameters. Incorrect PID values will hamper chiller
performance.
Reservoir
Periodically inspect the fluid inside the reservoir. If cleaning is necessary,
flush the reservoir with a cleaning fluid compatible with the circulating
system and the cooling fluid.
The cooling fluid should be replaced periodically. Replacement frequency
depends on the operating environment and amount of usage.
Before changing the cooling fluid ensure it is at a safe handling
temperature.
NOTE It will be necessary to use a wet-vac or siphon to completely
drain the reservoir. Use care so as not to damage the reservoir float
switch.
See Chapter 2, Filling Requirements, for instructions on cooling fluid
replacement.
Condenser
For proper operation, the chiller needs to pull substantial amounts of
air through a condenser. A build up of dust or debris on the fins of
the condenser will lead to a loss of cooling capacity. Optional air filters
are available, contact our Service Department. See Preface, After-Sale
Support.
The lower front of the chiller has a one-piece grille assembly. Using your
hands gently pry the assembly off. Use care not to scratch the paint.
Periodic vacuuming of the condenser fins is necessary. The cleaning
frequency depends on the operating environment. After initial
installation we recommend a monthly visual inspection of the
condenser. After several months, the cleaning frequency will be
established.
Use care cleaning the condenser fins, they can be easily bent.
P
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Chapter 4
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Merlin 4 - 3
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