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6-2 ThermoFlex Section 6 Thermo Scientific The reser voir has a uid bag lter designed to prev ent the introduction of par ticulates into the system. Chillers are shipped with a bag lter in place . Note The uid bag lt…
ThermoFlex 6-1
Thermo Scientific
Section 6 Preventive Maintenance
Only Thermo Fisher should provide any required replacement parts.
The ThermoFlex chiller has an integrated preventive maintenance timer that
will alert you when it is time to perform preventive maintenance. This unique
feature will remind you to change your air and uid lters.
Based on the environment in which your chiller is located, you can choose
from four levels of preventive maintenance off, L1, L2, and L3:
• off – Disables the alert
• L1 – 1,000 hours - default setting
· Heavy manufacturing environment
· Airborne particulate created during manufacturing process
• L2 – 2,000 hours
· Typical production environment
• L3 – 3,000 hours
· Clean environment – ltered air
· Typically laboratory or research environment
Change/set the level using the Setup Loop, see Section 4. When the chiller
exceeds the chosen limit, the controller will ash and, if
enabled, an audible alarm will sound.
To clear this message press
. This will automatically restart the
preventive maintenance timer for your lters. Each time the chiller exceeds
the chosen time, the controller will remind you that it is time to change your
lters.
If you change your lters before the preventive timer trips, you can clear the
timer by using the Diagnostic Loop explained in this Section.
Note For air-cooled chillers, both the air and uid lters in the ThermoFlex
can be changed while the chiller is running. For water-cooled chillers, only the
uid lter can be changed while the chiller is running.
Preventive
Maintenance Timer
( )
6-2 ThermoFlex
Section 6
Thermo Scientific
The reservoir has a uid bag lter designed to prevent the introduction of
particulates into the system. Chillers are shipped with a bag lter in place.
Note The uid bag lter can be removed with the chiller operating.
Before using any uid or performing maintenance where contact
with the uid is likely refer to the manufacturer’s MSDS for handling
precautions.
Fluid Filter Bag
Before replacing the reservoir housing ensure the reservoir sight
tube ball stopper is securely in place, see next page.
On ThermoFlex900-5000s, when you remove the bag you will notice a
wire mesh uid diffuser inside the reservoir supply line, see Figure 6-2. The
diffuser is used to help streamline the ow into the reservoir. After several
bag replacements turn the chiller off and remove the diffuser to inspect it
for debris/damage.
The uid velocity into the reservoir will rapidly increase with the
diffuser removed and cause splashing. Turn the chiller off before
removing the diffuser. This is especially critical when using ethylene
or propylene glycol.
Note To prevent particulates from entering the reservoir, ensure the uid
bag lter is in place before removing the diffuser.
Do not operate the chiller unless the diffuser is installed.
Fluid Bag Filter
Figure 6-1 Fluid Filter Bag
Funnel Housing
Fluid Diffuser
WARNING
WARNING
CAUTION
CAUTION
When it is time to replace the bag,
gently pull up on the plastic funnel
housing to remove it and simply pull
the bag out of the chiller. Replacement
bags are available from Thermo Fisher
Scientic.
Section 6
ThermoFlex 6-3
Thermo Scientific
Reservoir
Cleaning
The user is responsible for maintaining reservoir uid quality. Check the
uid on a regular interval. Start with frequent checks until a regular interval
(based on your application) is established.
If cleaning is necessary, ush the reservoir with a uid compatible with the
process uid and the chiller's wetted parts, see Section 8.
Before using any uid or performing maintenance where contact
with the uid is likely refer to the manufacturer’s MSDS for handling
precautions.
Reservoir Sight Tube
Clean the sight tube by gently pulling up on the plastic funnel housing to
remove it (see illustration on previous page) and then gently pulling out the
black sight ball stopper from the tube. Use a long soft-bristle ¼" brush.
Use caution not to scratch the glass.
Before replacing the reservoir housing ensure the reservoir sight tube
ball stopper is securely in place.
For easier replacement, wet the stopper rst and then use a twisting motion
to install it in the sight tube.
Wire Mesh Fluid Diffuser
(ThermoFlex900-5000)
Sight Tube
Ball Stopper
Figure 6-2 Reservoir Cleaning and Diffuser
An effective recommended maintenance plan would include changing
the uid every six months to optimize chiller reliability, see Section 3 for
additional information.
Fluid Maintenance
WARNING
CAUTION