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QuickStart Procedures (Air-Cooled Models)
Installation
Position the unit so the intake and discharge are
not impeded. Inadequate ventilation will cause a
reduction in cooling capacity and, in extreme
cases, compressor failure.
Avoid excessively dusty areas and institute a
periodic cleaning schedule. For proper operation,
the unit 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
coolingcapacity.
The unit will retain its full rated capacity in ambient
temperatures up to approximately +24°C.
Ensure the voltage of the power source meets the
specified voltage, ±10%
.
The plumbing connections are located on the right
side of the unit and are labelled SUPPLY and
RETURN.Theseconnectionsare¾inchFPT,
1 inch FPT for units with a CP 75 or TU 9 pump.
Removetheplasticprotectiveplugsfromboth
plumbingconnections.Connect the SUPPLYfitting
to the inlet of your application. Connect the RE-
TURNfitting to theoutlet of yourapplication.
Tofill thereservoir open theaccess panelon the left
rearcornerofthecasetopandremovethereservoir
coverby unscrewing thethumbscrews. Fill the
reservoirto withinoneinch ofthetop. Ifthe fluid
capacity of your application and recirculation lines is
significant,haveextrafluidonhand.
Werecommendusingdistilled/deionizedwaterwith
a 0.05 to 0.1 MOhmcm reading. If you do not have
accesstodistilled/deionizedwaterwerecommend
usingfiltered facility water.
Operation
Before starting the unit, double-check all electrical
and plumbing connections. Make sure the circulat-
ing system has been filled with cooling fluid.
OnmodelsHX 300 throughHX 750,theunitmust be
connected to the power source for at least 12 hours
to allow the compressor oil to heat and separated
fromtherefrigerant.
To start the unit first connect it to main power. On
units equipped with a circuit protector, place it to
the on position. The MAIN POWER LED will
illuminate. Place the ON/OFF switch to the ON
position.TheCOOLandHEAT LEDson the front
panel indicate the status of the refrigeration system.
COOLis onwhen the unit is removingheat fromthe
cooling fluid, HEAT is on when heat is being added
tothefluidreservoir.Astheoperatingtemperature
approaches the setpoint, the LEDs cycle.
When the unit is shut off, wait five minutes before
restarting to allow time for the refrigeration
pressures to equalize. If the pressures are not
allowed to equalize, the compressor will short-
cycle and no cooling will occur.
Temperature Adjustment
To display the temperature setpoint, while
displaying the reservoir temperature press the
NEXT key. To adjust the temperature setpoint
use the YES/NO keys as described in this
manual.
Flow Control
The RECIRCULATING FLOW CONTROL handle
controls the flow rate to your application. In the full
vertical position you receive full flow, the full
horizontal position is no flow.
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.
When operating at low temperatures, the concen-
tration of water in the cooling fluid will increase
over time, leading to a loss of cooling capacity.
Periodic vacuuming of the condenser fins is
necessary. The frequency of cleaning depends on
the operating environment. We recommend
making a monthly visual inspection of the
condenser after initial installation. After several
months, the cleaning frequency will be estab-
lished.
Units with PD and TU pumps have a strainer. If
debris is in the system, the strainer will prevent
the material from being drawn into the pump and
damaging the pump vanes.
After initial installation, the strainer may become
clogged. The strainer must be cleaned after the
first week of installation. After this first cleaning, a
monthlyvisualinspectionisrecommended.After
several months, the frequency of cleaning will be
established.
Before cleaning the strainer, disconnect the
power cord from the power source and drain the
reservoir.
General Information
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