ThermoFlex-Manual.pdf - 第70页
Section 4 4-12 ThermoFlex Thermo Scientific Shut Down Press the key on the controller . Note T o protect the chiller's compressor , the chiller will enter a 5 to 20 second shut down cycle (colder process uids tak e …
Section 4
ThermoFlex 4-11
Thermo Scientific
yES
no
drAin
StorE
drAin
enter
enter
SEr
xxxx
LoFLO
LoFLO
enter
enter
Figure 4-7 Setup Loop (Optional Features)
• LoFLO is used to set the low ow alarm limit.
T 0 Pump Range: 0.0 to 10.5 GPM Default: 0.0 GPM
T 1 Pump Range: 0.0 to 10.5 GPM Default: 0.0 GPM
T 5 Pump Range: 0.0 to 15.0 GPM Default: 0.0 GPM
P 1 Pump Range: 0.0 to 10.5 GPM Default: 0.0 GPM
P 2 Pump Range: 0.0 to 10.5 GPM Default: 0.0 GPM
P 3 Pump Range: 0.0 to 30.0 GPM Default: 0.0 GPM
P 4 Pump Range: 0.0 to 30.0 GPM Default: 0.0 GPM
P 5 Pump Range: 0.0 to 30.0 GPM Default: 0.0 GPM
Going below the low limit ashes LoFLO and, if
enabled, sounds the alarm. The chiller's reaction depends
on the alarm (ALr) setting.
This feature is not enabled until the value is changed to
something other than 0.0. If the feature is not enabled
and the ow rate drops below the ow rate listed below
the chiller will continue to run and the controller will ash
between FLo and LoFLo.
P
1, T 0, T 1 and T 5 Pump 0.3 GPM
P
2 Pump 1.0 GPM
P
3, P 4 and P 5 Pump 4.0 GPM
• SEr is used to congure the serial communications
mode of operation. See Appendix D.
Note Keypad operation is still available with serial com-
munications enabled.
• drAin is used to open and close the chiller's anti
drainback valve for draining, see Section 5.
Range:
yes or no Default: no
Note The chiller must be off to drain the valve. The valve
automatically closes when you exit the drAin display.
When the display indicates StorE press
to save all changes or press to not save all
changes. The display will return either the process uid
temperature or, if the chiller was off when you entered
the loop, a blank screen.
Continued from previous page
Save all changes
Do not save all changes
Section 4
4-12 ThermoFlex
Thermo Scientific
Shut Down
Press the key on the controller.
Note To protect the chiller's compressor, the chiller will enter a 5 to 20
second shut down cycle (colder process uids take longer) before the
refrigeration system and pump shut down. During this time the display
will indicate
OFF
. The bars will scroll downward indicating the
controller is in the shut down cycle.
Using any other means to shut the chiller down can reduce the life of the
compressor.
For ThermoFlex900 - 10000 chillers, when the display goes blank it is safe
to place the circuit protector located on the rear to the off ( 0 ) position.
Always turn the chiller off and disconnect it from its supply voltage
before moving.
For ThermoFlex900 - 10000s, the circuit protector located on the rear
is not intended to act as a disconnecting means.
CAUTION
CAUTION
ThermoFlex 5-1
Thermo Scientific
Auto Refill
The auto rell uid must also meet water quality standards or the valve may
fail to operate as designed, see Section 3.
The auto rell valve input pressure must be < 80 PSI to ensure the valve
functions properly.
The auto rell operates when all of the following conditions are met:
• Fluid is available
• The chiller is turned on
• The uid reaches a low level condition.
The auto rell shuts off when:
• The uid reaches the correct operating level.
• The delay timer exceeds user ll time entered in the Setup Loop, see
Section 4. If FLt is selected in the Setup Loop the chiller also shuts
down. (If indC is selected the chiller continues to run.) In either case
the controller will display rEFIL.
• The chiller shuts down for any reason.
Setting the ll time to 0 disables auto rell. If a low level condition occurs
the chiller will:
• If Indc is selected, continue to run and the controller displays Add.
• If FLt is selected, shut down and the controller displays LLF.
Figure 5-1 Auto Refill Fitting
Section 5 Options/Accessories
The Auto Rell provides makeup uid to replace any uid lost to evaporation,
etc. It requires a pressurized uid source connection to the ¼" Female Pipe
Thread tting on the rear of the chiller. (If Teon
®
tape is used, ensure the
tape does not cover the connection's starting-end thread.)
Note ThermoFlex7500 through 24000s with a P3 or P5 or ThermoFlex7500s
and 10000s with a T5 pump have a ¼" Male brass plug installed in the
connection, remove the plug before connecting the makeup uid.