Full Gauge TC-900Ri User manual

1. DESCRIPTION
3. TECHNICAL SPECIFICATIONS
TC-900Ri is a control for low temperature ventilated units which automates defrosting processes,
providing great energy saving.
It has two sensors, one for environment temperature and other that, mounted to the evaporator,
commands the end defrost process and puts the fans back to work.
Product in agreement with CE (European Community) and UL Inc. (USAand Canada).
• Counters
• Refrigerating balconies
TC-900Ri - 115/230 Vac ±10% (50/60 Hz)
TC-900RiL - 12/24 Vac/dc
-50 to 75° C
0 to 50°C
10 to 90% RH (without condensation)
0.1°C from -10 to 75°C and 1°C outside this range
2. APPLICATION
- Power supply:
- Control temperature:
- Operating temperature:
- Operating humidity:
- Resolution:
- Load current (outputs):
- Dimensions:
- Sensors:
CLASSIFICATION ACCORDING TO IEC60730-2-9 STANDARD:
- Temperature limit of the installation surface:
- Type of construction:
- Automatic action:
- Control of pollution:
- Impulse voltage:
- Temperature for the test of sphere pressure:
- Insulation:
REFR: 5(3)A/ 250Vac 1/8HP(compressor, solenoid valve or contactor)
FANS: 5(3)A / 250Vac 1/8HP (evaporator fans)
DEFR: 5(3)A/ 250Vac (defrost - resistance or hot gas)
71 x 28 x 71mm
S1: ambient sensor (black cable)
S2: evaporator sensor (gray cable)
50°C
Built-in electronic controller
Type 1
Level 2
1,5kV
75°C and 125°C
Class II
Refrigeration time (interval between defrosts)
Compressor delay after on (on - off)
Compressor delay after off (off - on)
Compressor status with detached ambient sensor (S1)
Defrost when the instrument is powered on
Evaporator temperature (S2) for end defrost
Maximum duration of defrost (for security)
Fan turned on during defrost
Defrost type
Locked temperature indication (S1) during defrost
Draining time (dripping of defrost water)
Evaporator temperature (S2) for fan return after draining
Maximum time of fan return after draining (fan-delay)
Fan on with compressor off (refrigeration)
Fan stopped for high temperature in the evaporator
F08
F09
F10
F11
F12
F13
F14
F15
F16
F17
F18
F19
F20
F21
F22
1
0
0
0-off
0-no
-50
0=disable
0-no
0 - electric
0-no
0
-50
0
0-no
-50
999
999
999
1 - on.
1 - yes
75.0
90
1 - yes
1 - hot gas
1 - yes
30
75.0
30
1 - yes
75.0
min.
sec.
sec.
-
-
ºC
min.
-
-
-
min.
ºC
min.
-
ºC
4.3 - Parameters description
F01 - Access code (123)
F02 - Control differential (hysteresis)
F03 - Offset indication for ambient sensor
F04 - Minimum setpoint allowed to the end user
F05 - Maximum setpoint allowed to the end user
F10 - Compressor delay after off (off-on)
F11 - Compressor status with detached ambient sensor (S1)
F12 - Defrost when the instrument is powered on
F13 - Evaporator temperature (S2) for end defrost
F14 - Maximum duration of defrost (for security)
To change the parameters it is necessary to use the access code.It is not necessary to use the access
code to visualize the adjusted parameters.
It is the difference of temperature (hysteresis) between to turn OFF and turn ON the refrigeration output.
Example: To control the temperature in 4.0°C with differential of 1.0°C. Soon, the refrigeration will be
turned off in 4.0°C and turned on again in 5.0°C (4.0 + 1.0)
It allows to compensate eventual shunting lines in the reading of ambient temperature (S1) proceeding
from the exchange of the sensor or cable length alteration.
Electronic limits whose purpose is prevent that too high or too low setpoint temperatures are regulated.
It is the minimum time that compressor will keep off, it means, space of time between the last stop and
the next drive. It serves to alliviate the discharge pressure and to increase the time of useful life of the
compressor.
If the ambient sensor (S1) will be danified or outside the specified range, the compressor assumes the
configured status in this function.
Example: For counters of fruits, it is better to keep the compressor off. In counters of meat it is better to
keep the compressor on.
It makes possible the accomplishment of a defrost at the moment that controller is energized, for
example, in the return of electrical energy (in case of energy lack)
If the temperature in the evaporator (sensor S2) reaches the adjusted value, the end of defrost will be for
temperature. With this, the defrost process is optimized.
This function serves to adjust the maximum value of time for defrost. If evaporator temperature does not
reach the configured value in F13 in this period a point will blink in the right down side of display
indicating that end of defrost ocurred for time and not for temperature.
F06 - Delay when the instrument is powered on
F07 - Act point of high ambient temperature alert
F08 - Refrigeration time (interval between defrosts)
F09 - Compressor delay after on (on-off)
F15 - Fan turned on during defrost
F16 - Defrost type
F17 - Locked temperature indication (S1) during defrost
F18 - Draining time (dripping of defrost water)
When the instrument is powered on, its control is kept disabled during a time, delaying the start of
process. During this time, it works only as temperature indicator. It serves to prevent demand of electric
energy peaks, in case of lack or return of the same and when exists a lot of equipment connected on the
same net. For this, just adjust different times for each equipment. This delay may be of compressor or
defrost (when exist defrost on turn on).
If the ambient temperature (sensor S1) reaches this point during refrigeration, this will be signaled
visually through the indication blinking on display.
It is the time which compressor will turn on and turn off only for ambient temperature and starts to be
counted when the fan is turned on , after fan-delay stage (fan return after draining).
It is the minimum time that compressor will keep on, it means, space of time between the last drive and
the next stop. It serves to prevent high voltage events in the electric network.
It makes possible the fan functioning during defrost.
Natural defrost or by resistances installed outside the evaporator.
"0" = Electrical defrost (resistances), where the defrost output is active.
"1" = Defrost by hot gas, where compressor and defrost outputs are actives.
This function prevents that ambient temperature elevation during defrost be visualized, keeping the last
indication before defrost. The indication is released again in the initial of refrigeration cycle, after fan-
delay.
Necessary time for dripping, it means, for draining the last water drops of evaporator. All the outputs are
kept off. If this stage will not be desired, adjust this time for “zero”.
The end of defrost by time (which is not desired) can happen on the following situations:
-Adjusted temperature too high
- Maximum time of defrost too short
- Detached sensor or without contact with evaporator
Example:
(F13)
(F14)
4. CONFIGURATIONS
- Press for 2 seconds until appears , and release it after that. The adjusted operation
temperature will appear.
- Use and to change the value and then press to record it.
4.1 - Control temperature adjust (SETPOINT):
SET
4.2 - Parameters table
Description Min Max Unid Fun
Access code:123 (one hundred and twenty-three)
Control differential (hysteresis)
Offset indication for ambient sensor
Minimum setpoint allowed to the end user
Maximum setpoint allowed to the end user
Delay when the instrument is powered on
Act point of high ambient temperature alert
F01
F02
F03
F04
F05
F06
F07
-
0.1
-20
-50
-50
0
-50
-
20.0
20.0
75.0
75.0
30
75.0
-
ºC
ºC
ºC
ºC
min.
ºC
SET
TC-900Ri
DIGITAL CONTROLLER FOR
REFRIGERATION AND DEFROST
Ver. 10
UL-Underwriters Laboratories
TC900V10-1T-10706

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 F18F08
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
0115V
(12V )
230V
(24V )
REFR
DEFR
FANS
Loads
supply
COMMON
Over the specifield current
use a contactor.
Sensor
(black)
1
Sensor
(gray)
2
45678910 11 12 321 21
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 using2x24AWGcable.
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.