The fan-delay cycle starts after draining. The refrigeration output (REFR) is active, therefore the
ambient temperature is high, but the fan is actived only after the temperature in evaporator is less than
the adjusted value. This process is necessary to remove the heat that still exists in the evaporator
because of defrost, preventing to transfer this heat to the ambient.
For security, if the temperature in the evaporator does not reach the adjusted value in F19 or sensor S2
is detached, the fan-delay will happen on the adjusted time in this function.
During the refrigeration cycle, the fan activation may depends on the compressor status.
"0" = The fan is actived only while the compressor is active. This alternative, in some cases, allows great
economy of electric energy.
"1" =The fan is kept on during all refrigeration cycle.
It has for purpose the cycle of evaporator ventilation until the ambient temperature approaches the
desired temperature in the refrigerating installation project, preventing high temperatures and
pressures that can damage the compressor. If the temperature in evaporator exceed the adjusted value,
the fan is turned off and turned on again with a fixed hysteresis of 2°C below this value.
F19 - Evaporator temperature (S2) for fan return after draining (fan-delay)
F20 - Maximum time of fan return after draining (fan-delay)
F21 - Fan on with compressor off
F22 - Fan stopped for high temperature in evaporator
5. OPERATION
5.1 - Parameters visualization
a)
b)
c)
d
e)
a)
b)
c)
5.1-b
5.1-c
d)
e)
Press at the same time
and
for 2 seconds until appear
, releasing them after that.
Soon, appears
.
Use
and
to access the desired function.
After selecting the function, press
(short touch) to visualize the configured value.
) Press again
(short touch) to return the functions menu.
To reset the menu and return to normal operation (temperature indication), press
until appear
.
Access the function F01 by pressing at the same time
and
for 2 seconds until appear
,
releasing then after that. Soon will appear
, and then press
(short touch).
Use
and
to enter the access code (123), and then press
.
Select the desired function and visualize the configured value (see itens
and
).
Use
and
to change the value and then press
to record the configured value and return
to the functions menu.
To reset the menu and return to normal operation (temperature indication), press
until appear
.
5.2 - Parameters configuration
SET
SET
SET
SET
SET
SET
SET
5.3 - Process stage, elapsed time and evaporator temperature (S2)
Press
. The stage of the process will appear, the elapsed time (in minutes) and evaporator
temperature (S2).
In case of detached sensor or temperature out specified range will appear
.
Process stages:
Initial delay (delay to start the control)
Fan-delay (delay to fan return)
Refrigeration
Defrost
Draining
FAN-DELAY
REFRIGERATION
DEFROST
DRAINING
Indication released
F20
F14
F18
F08
Indication locked (if enabled in F17)
5.4 - Manual defrost
To do a manual defrost, regardless of the programming, keep pressed
for 4 seconds, until appears the
indication
.
If the instrument is in defrost and you want to finish it, follow the above instructions, until appears the
indication
.
5.5 - How to determine the end defrost by temperature
a)
b)
c)
d)
e)
f)
g)
h)
Adjust the follow functions with maximum values:
- Refrigeration time (F08 = 999 min)
- Evaporator temperature for end defrost (F13 = 75.0 ºC)
- Maximum duration of defrost (F14 = 90 min)
Wait until an ice layer to be created on the evaporator
Do a manual defrost, pressing
for 4 seconds, until appear
.
Observe the melting process.
Wait until melt all ice layer on the evaporator to consider the defrost finished.
Check the evaporator temperature read by the sensor S2 at this moment, pressing the key
(see item 5.3)
and copy this value to the function F13 - Evaporator temperature (S2) for end defrost.
As security, adjust again the function F14 -
that depends of the defrost type.
Now adjust the function F08 -
Maximum duration of defrost,
Exemple: Electrical defrost (resistance) =45 minutes as maximum
Defrost for by hot gas = 20 minutes as maximum
Refrigeration time with the desired value.
5.6 - Indicators and alarms
5.7 - Minimum and maximum temperatures register
The leds indicate the control outputs status:
: Compressor or solenoid of liquid gas
: Evaporator fans
: Defrost (heating)
In normal operation,
indicates the ambient temperature (sensor S1)
The indication stays blinking when the ambient temperature (S1) reaches the adjusted value in F07.
Always that defrost ends for time and not for temperaure, a point located in the right down side of display will
blink until the next defrost indicating that:
-The interval between defrosts is too high.
-There are burned resistances.
-The hot gas is not circulating.
-There is an inoperative fan or the adjusted time is too short for the maximum duration of defrost.
If during the refrigeration sensor S1 or sensor S2 will be detached or outside the specified temperature range,
the indication
will appear for S1 or
for S2 and the compressor will assume the configurated
status in F11, for security.
Invalid configuration parameters
- In this situation the outputs are turned off.
- Check which parameters have invalid data and correct them to return to normal operation.
Press
, soon
appears and the minimum and maximum temperatures of S1 sensor (ambient
temperature). After soon
appears and the minimum and maximum temperatures of S2 sensor
(evaporator).
REFR
FANS
DEFR
TC-900Ri
Note: To reset the registers keep pressed the key
during the visualization of the minimum and
maximum temperatures until
to be showed.
- The sensor S1 (black) must be in the ambient.
- The sensor S2 (gray) must be placed in the evaporator through metallic cramp.
Power
supply
0
115V
(12V )
230V
(24V )
REFR
DEFR
FANS
Loads
supply
COMMON
Over the specifield current
use a contactor.
Sensor (black)
1
Sensor (gray)
2
4
5
6
7
8
9 10 11 12
3
2
1
2
1
6 - 7
6 - 8
115V
230V
12V
24V
TC-900Ri
TC-900RiL
72 mm
Dimension of the clipping
for setting of the instrument
in panel
29
mm
6. ELECTRICAL CONNECTIONS
IMPORTANT
1:
2:
3:
According to the chapters from the IEC60364 standard:
Install
on power supply
Sensor cables and computer signals can be together, however not at the same place where power
supply and load wires pass for
Install suppresor of transient in parallel to loads to increase the usefull life of the relays
protectors against over voltage
For more information contact our application eng. department through e-mail
or dial +55 51 3475.3308.
support@ fullgauge.com
Contact suppresor connection diagram
Suppresor
A1
A2
A1 e A2 are the
contactor coils.
Diagram for suppresor installation
for direct drive load inputs
Load
Suppresor
For direct activation the maximum
specified current should be taken
into consideration.
Note: The sensor cable lenght can be increased by the user until 200 meters using 2 x 24AWG cable.
PROTECTIVE VINYL:
This adhesive vinyl (included inside the packing) protects the instruments against
water drippings, as in commercial refrigerators, for example. Do the application after
finishing the electrical connections.
Remove the protective paper
and apply the vinyl on the entire
superior part of the device,
folding the flaps as indicated by
the arrows.
