CONTROLLER FOR REFRIGERATION
WITH REAL TIME DEFROSTING
AND SERIAL OUTPUT
Ver.10
TC-900Ri clock
1. DESCRIPTION
TC-900Ri clock
is a temperature controller for refrigerated products. It automates defrost processes
according to the need of the installation, saving energy. It has two sensors, one for room temperature and
another that, fixed to the evaporator, controls the end of defrost and fan return. In addition, it has an
internal real time clock that enables creating an agenda with up to eight daily defrosts for each day of the
week. The controller's internal battery guarantees its synchronism, even during power shortage, tor many
years. It has an output for serial communication, and can be managed remotely through Sitrad ® via
Internet.
Product complies with CE (European Union), NSF (
and UL Inc. (United States and
Canada).
2. APPLICATION
• Refrigeration chambers
• Counters
United States)
3. TECHNICAL SPECIFICATIONS
- Power Supply:
TC-900Ri clock -115/230 Vac ±10% (50/60 Hz)
TC-900RiL clock -12/24 Vac/dc
- Control temperature:
-50 to 75°C / -58 to 167°F
- Resolution:
0.1ºC from -10 to 75ºC and 1ºC outside this range / 1°F in all range
- Operating temperature:
0 to 50 ºC / 32 to 122°F
- Operation humidity:
10 to 90% RH (without condensation)
- Dimensions:
71 x 28 x 71mm
- Load current (outputs):
REFR: 5(3)A / 250Vac 1/8HP (compressor, solenoid valve or contactor)
FANS: 5(3)A / 250Vac1/8HP (evaporator fans)
DEFR: 5(3)A / 250Vac (defrost resistance or hot gas)
- Sensors:
S1: ambient sensor (black cable)
S2: evaporator sensor (gray cable)
4.
4.1 - Control temperature adjust (SETPOINT):
- Press for 2 seconds until appears , and release it after that. The adjusted temperature will
appear.
- Use and to change the value and then press to record it.
CONFIGURATIONS
SET
SET
CLASSIFICATION ACCORDING TO IEC60730-2-9 STANDARD:
- Temperature limit of the installation surface:
50º C
- Type of construction:
Built-in electronic controller
- Automatic action:
Type 1
- Control of pollution:
Level 2
- Impulse voltage:
1,5kV
- Temperature for the test of sphere pressure:
75ºC and 125ºC
- Insulation:
Class II
Fun
Defrost by programmed time (weekly schedule)
Control differential (hysteresis)
Minimum setpoint allowed to the end user
Maximum setpoint allowed to the end user
Delay when the instrument is powered on
Act point of low ambient temperature alert (S1)
Act point of high ambient temperature alert (S1)
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 defrost duration (for security)
Fan turned on during defrost
4.2 - Parameters table
Description
Min
Max
Unit Standard
Min
Max
Unit Standard
CELSIUS
FAHRENHEIT
0 - no
0.1
-50
F03
0
-50.0
-50.0
1
0
0
0 - off
0 - no
-50.0
0=disable
0 - no
1 - yes
20.0
F04
75.0
30
75.0
75.0
999
999
999
1 - on
1 - yes
75.0
90
1 - yes
-
°c
°c
°c
min.
°c
°c
min.
sec.
sec.
-
-
°c
min.
-
0 - no
1
-58
F03
0
-58
-58
1
0
0
0 - off
0 - no
-58
0=disable
0 - no
1 - yes
36
F04
167
30
167
167
999
999
999
1 - on
1 - yes
167
90
1 - yes
-
°F
°F
°F
min.
°F
°F
min.
sec.
sec.
-
-
°F
min.
-
1 - yes
2.0
-50.0
75.0
0
-50.0
75.0
240
0
0
1 - on
0 - no
40.0
45
0 - no
1 - yes
4
-58
167
0
-58
167
240
0
0
1 - on
0 - no
104
45
0 - no
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 (S2)
Offset indication for ambient sensor (S1)
Network equipment address RS - 485 (serial communication)
0 - electric
0 - no
0
-50
0
0 - no
-50
-20.0
001
-
-
min.
°C
min.
-
°C
°C
-
1- hot gas
1 - yes
30
75.0
30
1 - yes
75.0
20.0
247
0 - electric
0 - no
10
0.0
1
1 - yes
50.0
0.0
001
0 - electric
0 - no
10
32
1
1 - yes
122
0
001
0 - electric
0 - no
0
-58
0
0 - no
-58
-36
001
1- hot gas
1 - yes
30
167
30
1 - yes
167
36
247
-
-
min.
°F
min.
-
°F
°F
-
Exemple: 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)
F03 - Minimum setpoint allowed to the end user
F04 - Maximum setpoint allowed to the end user
Electronic limits whose purpose is prevent that too high or too low setpoint temperatures are
regulated.
F05 - Delay when the instrument is powered on
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).
F06 - Act point of low ambient temperature alert
F07 - Act point of high ambient temperature alert
If the ambient temperature (S1) reaches this point during the refrigeration, this will be visually signaled
by the indication of a blinking light on the display.
F08 - Refrigeration time (interval between defrosts)
It is the time which compressor will turn on and turn off only for ambient temperature and starts to
becounted when the fan is turned on , after fan-delay stage (fan return after draining).
Caution: The defrost will only begin if the temperature indicated in S2 (evaporator sensor) is less than
indicated in F13.
F09 - Compressor delay after on (on-off)
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.
4.2.1 - Parameters description
F01 - Defrost by programmed time (weekly schedule)
This function allows that the defrosts scheduled by time are enabled.
"O" = The defrosts normally happen after the end of the refrigeration stage.
"1" = The defrosts are activated by the programmed time that is set in the weekly schedule.
F02 - Control differential (hysteresis)
It is the difference of temperature (hysteresis) between to turn OFF and turn ON the refrigeration output.
CLOCKV10-04T
-1
1000
COMPONENT
UL-Underwriters Laboratories
