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Preface
Installation
The chiller has an air-cooled refrigeration system.
Air is drawn in the front of the chillerand dis-
charged through rear and sides. Position the chiller
so the intake and discharge are not impeded. Inad-
equate ventilation will cause a reduction in cooling
capacity and, in extreme cases, compressor failure.
Excessively dusty areas should be avoided and a
periodic cleaning schedule should be instituted. For
proper operation, the chiller needs to pull substan-
tial 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.
The chiller will retain its full rated capacity in
ambient temperatures up to approximately +77°F
(+25°C).
Make sure the voltage of the power source meets
the specified voltage, ±10%.
The plumbing connections are located on the rear
of the chiller and are labelled
connections are ½ inch FPT. Remove the plastic
protective plugs from both plumbing connections.
Connect the
fitting to the inlet of your appli-
cation. Connect the
your application.
To fill the reservoir, remove the reservoir access
panel and locate the reservoir cap. Remove the cap
and fill the reservoir with clean cooling fluid.
The chiller is designed to use HFE-7100, HFE-7200,
FC-3283 and FC-77.
Operation
Before starting the chiller, double-check all electri-
cal and plumbing connections. Make sure the
circulating system is properly filled with cooling
fluid. Place the circuit protector located on the rear
of the chiller to the up position.
To start the chiller, press
press
again.
The
LED indicates the status of the refrigeration
system. It illuminates to indicate the refrigeration
system is removing heat from the cooling fluid. As
the operating temperature approaches the setpoint,
the LED will flash.
viii
Merlin
Quick Reference Operating Procedures
and
. These
fitting to the outlet of
. To turn the chiller off
Temperature Adjustment
To display the temperature setpoint, press
controller. The
indicator will illuminate and the
display will flash the current setpoint value. To adjust
the temperature setpoint, press the arrow keys until the
desired temperature setpoint is indicated. Press
again to confirm the change. The display will rapidly
flash the new value for a short time and then return to
the recirculating fluid temperature.
Periodic Maintenance
Periodically inspect the reservoir fluid. 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.
Frequency depends on the operating environment and
amount of usage.
Before changing the cooling fluid ensure it is at a safe
temperature.
Periodic vacuuming of the condenser fins is necessary.
The frequency of cleaning depends on the operating
environment. We recommend a monthly visual inspec-
tion of the condenser after initial installation. After
several months, the cleaning frequency will be estab-
lished.
Chillers have a pump strainer. If debris is in the system,
the strainer will prevent the material from being drawn
into the pump and damaging the pump vanes. A clogged
strainer will also cause increased pump discharge pres-
sure.
After initial installation, the strainer may become
clogged. Clean the strainer after the first week of
installation. After this first cleaning, we recommend a
monthly visual inspection. After several months, the
cleaning frequency will be established. Before cleaning,
disconnect the power cord from the power source and
drain the chiller.
on the
Thermo Scientific
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