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 ULInc. (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:
CLASSIFICATIONACCORDING 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.
-
-
º C
min.
-
-
-
min.
º C
min.
-
º C
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
-
º C
º C
º C
º C
min.
º C
SET
TC-900Ri
DIGITAL CONTROLLER FOR
REFRIGERATION AND DEFROST
Ver. 10
UL-Underwriters Laboratories
TC900V10-1T
-10706
