1. DESCRIPTION
3. TECHNICAL SPECIFICATIONS
TC-900Ri is a controlfor low temperature ventilated units which automatesdefrosting processes,
providing greatenergy saving.
It has two sensors, one for environment temperature and other that, mounted to the evaporator,
commands theend defrostprocess and putsthe fansback to work.
Product inagreement withCE (European Community)and ULInc. (USAand Canada).
• Counters
• Refrigeratingbalconies
TC-900Ri -115/230 Vac±10% (50/60 Hz)
TC-900RiL- 12/24Vac/dc
-50 to75° C
0 to50°C
10 to90% RH(without condensation)
0.1°C from-10 to75°C and 1°Coutside thisrange
2. APPLICATION
- Powersupply:
- Control temperature:
- Operatingtemperature:
- Operatinghumidity:
- Resolution:
- Loadcurrent (outputs):
- Dimensions:
- Sensors:
CLASSIFICATIONACCORDING TOIEC60730-2-9 STANDARD:
- Temperature limitof theinstallation surface:
- Type ofconstruction:
-Automatic action:
- Controlof pollution:
- Impulsevoltage:
- Temperature forthe testof sphere pressure:
- Insulation:
REFR: 5(3)A/ 250Vac 1/8HP(compressor, solenoid valveor contactor)
FANS:5(3)A /250Vac 1/8HP(evaporator fans)
DEFR: 5(3)A/ 250Vac (defrost- resistanceor hot gas)
71 x28 x71mm
S1: ambientsensor (blackcable)
S2: evaporatorsensor (graycable)
50°C
Built-in electroniccontroller
Type1
Level 2
1,5kV
75°C and125°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 indicationfor ambient sensor
F04 -Minimum setpointallowed to theend user
F05 -Maximum setpointallowed to theend user
F10 -Compressor delayafter off (off-on)
F11- Compressor statuswith detachedambient sensor (S1)
F12 -Defrost whenthe instrument ispowered on
F13 -Evaporator temperature(S2) for enddefrost
F14 -Maximum durationof defrost (forsecurity)
Tochange the parameters itis necessary to use the access code.Itis not necessary touse the access
code to visualizethe adjustedparameters.
It isthe differenceof temperature (hysteresis) betweento turnOFF andturn ONthe refrigerationoutput.
Example: To control the temperature in 4.0°C with differential of 1.0°C. Soon, the refrigeration will be
turned off in4.0°C and turnedon againin 5.0°C (4.0+ 1.0)
It allows tocompensate eventual shunting lines in the readingof ambient temperature(S1) proceeding
from theexchange ofthe sensor or cable lengthalteration.
Electronic limitswhose purposeis prevent thattoo highor too lowsetpoint temperaturesare regulated.
It is the minimumtime that compressor will keep off, it means, space of time between the last stop and
the next drive. It serves toalliviate the discharge pressure and to increasethe time of useful life of the
compressor.
If the ambient sensor (S1) will bedanified or outside the specified range,the compressor assumes the
configured statusin thisfunction.
Example: For countersof fruits, itis better tokeep the compressoroff. In countersof meat it is betterto
keep thecompressor on.
It makes possible the accomplishment of a defrost at the moment that controller is energized, for
example, inthe returnof electrical energy(in caseof energy lack)
If thetemperature in theevaporator (sensor S2) reachesthe adjusted value,the end ofdefrost will be for
temperature. Withthis, thedefrost process isoptimized.
This functionserves to adjustthe maximum valueof time fordefrost. If evaporatortemperature does not
reach the configured value in F13 in this period a point will blink in the right down side of display
indicating thatend ofdefrost ocurred fortime andnot for temperature.
F06 -Delay whenthe instrument ispowered on
F07 -Act pointof highambient temperaturealert
F08 -Refrigeration time(interval between defrosts)
F09 -Compressor delayafter on (on-off)
F15 -Fan turnedon during defrost
F16 -Defrost type
F17 -Locked temperatureindication (S1) duringdefrost
F18 -Draining time(dripping of defrostwater)
When the instrument is powered on, its control is kept disabled during a time, delaying the start of
process. Duringthis time, it works onlyas temperature indicator.It serves to preventdemand of electric
energy peaks,in case oflack orreturn ofthe same and when existsa lotof equipmentconnected on the
same net. For this, just adjust different times for each equipment. This delay may be ofcompressor or
defrost (whenexist defroston turn on).
If the ambient temperature (sensor S1) reaches this point during refrigeration, this will be signaled
visually throughthe indicationblinking 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 isturned on ,after fan-delay stage(fan return afterdraining).
It is theminimum time that compressor willkeep on, it means, spaceof time betweenthe last drive and
the nextstop. Itserves to preventhigh voltageevents in theelectric network.
It makespossible thefan functioning duringdefrost.
Natural defrostor by resistances installed outside the evaporator.
"0" =Electrical defrost (resistances), where thedefrost outputis active.
"1" =Defrost by hot gas,where compressor anddefrost outputsare actives.
This functionprevents that ambienttemperature elevationduring defrost be visualized, keepingthe last
indication before defrost. The indication is released again in the initial of refrigeration cycle, after fandelay.
Necessary timefor dripping, it means,for draining thelast waterdrops ofevaporator.All the outputs are
kept off. Ifthis stage willnot bedesired, adjust thistime for“zero”.
The endof defrostby time (whichis notdesired) can happenon thefollowing situations:
-Adjusted temperature too high
- Maximumtime ofdefrost too short
- Detachedsensor orwithout contact withevaporator
Example:
(F13)
(F14)
4. CONFIGURATIONS
- Press for 2 seconds until appears , and release it after that. The adjusted operation
temperature willappear.
- Use and to change thevalue andthen 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 ishigh, but the fan is actived onlyafter the temperature in evaporator isless than
the adjusted value. This process is necessary to remove the heat that still exists in the evaporator
because ofdefrost, preventing to transfer thisheat tothe ambient.
For security, if thetemperature in the evaporator doesnot reach the adjustedvalue in F19 or sensorS2
is detached,the fan-delaywill happen onthe adjustedtime in thisfunction.
During therefrigeration cycle,the fan activationmay dependson the compressorstatus.
"0" =The fan isactived only whilethe compressor isactive. This alternative, insome cases, allowsgreat
economy ofelectric energy.
"1" =The fanis kept on duringall refrigerationcycle.
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 thatcan damagethe compressor.If thetemperature inevaporator exceed theadjusted value,
the fanis turnedoff and turned onagain witha fixedhysteresis of2°C belowthis value.
F19 -Evaporator temperature(S2) for fanreturn afterdraining (fan-delay)
F20 -Maximum timeof fan returnafter draining(fan-delay)
F21 -Fan onwith compressor off
F22 -Fan stoppedfor high temperaturein evaporator
5. OPERATION
5.1 - Parameters visualization
a)
b)
c)
d
e)
a)
b)
c) 5.1-b 5.1-c
d)
e)
Press atthe same time and for 2 secondsuntil appear , releasingthem after that.
Soon, appears .
Use and toaccess the desiredfunction.
After selectingthe function,press (short touch)to visualizethe configuredvalue.
) Pressagain (short touch)to returnthe functionsmenu.
Toreset the menu and return to normal operation (temperature indication), press until appear
.
Access thefunction F01 by pressingat the sametime and for 2 secondsuntil appear ,
releasing thenafter that. Soonwill appear , and thenpress (shorttouch).
Use and to enter theaccess code(123), and thenpress .
Select thedesired functionand visualize theconfigured value(see itens and ).
Use and to change thevalue and thenpress to record theconfigured value andreturn
to thefunctions menu.
Toreset 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 caseof detachedsensor or temperatureout specifiedrange will appear .
Process stages: Initial delay(delay tostart the control)
Fan-delay (delayto fanreturn)
Refrigeration
Defrost
Draining
FAN-DELAY
REFRIGERATION
DEFROST
DRAINING
Indication released
F20 F14 F18F08
Indication locked (if enabled in F17)
5.4 - Manual defrost
Todo a manual defrost,regardless of the programming, keep pressed for 4seconds, until appearsthe
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 thefollow functionswith maximum values:
- Refrigerationtime (F08= 999 min)
- Evaporatortemperature forend defrost (F13= 75.0ºC)
- Maximumduration ofdefrost (F14 =90 min)
Waituntil anice layerto be createdon theevaporator
Do amanual defrost,pressing for 4 seconds,until appear .
Observe themelting process.
Wait untilmelt all icelayer on theevaporator to considerthe defrost finished.
Check theevaporator temperature read bythe sensor S2at this moment, pressingthe key (see item5.3)
and copythis value tothe function F13- Evaporator temperature(S2) forend defrost.
As security, adjust againthe function F14 - that dependsof thedefrost type.
Now adjustthe functionF08 -
Maximum durationof defrost,
Exemple: Electricaldefrost (resistance)=45 minutes asmaximum
Defrost forby hotgas = 20minutes asmaximum
Refrigeration timewith thedesired value.
5.6 - Indicators and alarms
5.7 - Minimum and maximum temperatures register
The ledsindicate thecontrol outputs status:
: Compressoror solenoidof liquid gas
: Evaporatorfans
: Defrost(heating)
In normaloperation, indicates theambient temperature(sensor S1)
The indicationstays blinkingwhen the ambienttemperature (S1)reaches the adjustedvalue inF07.
Always that defrost endsfor time and not for temperaure, apoint located in the right down sideof display will
blink untilthe nextdefrost indicatingthat:
- Theinterval betweendefrosts is too high.
- Thereare burnedresistances.
- Thehot gasis not circulating.
- Thereis aninoperative fan orthe adjustedtime is tooshort forthe maximum duration ofdefrost.
If duringthe refrigeration sensorS1 or sensorS2 will be detachedor outside thespecified temperature range,
the indication will appear for S1 or for S2 and the compressor willassume the configurated
status inF11, forsecurity.
Invalid configurationparameters
- Inthis situationthe outputs areturned off.
- Checkwhich parametershave invalid dataand correctthem to returnto normaloperation.
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 temperaturesuntil to beshowed.
- 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
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 tothe chaptersfrom the IEC60364standard:
Install on powersupply
Sensor cables and computer signals can be together, however not at the same place where power
supply andload wirespass for
Install suppresorof transientin parallel toloads toincrease the usefulllife ofthe relays
protectors againstover voltage
For more information contact our application eng. department through e-mail
or dial+55 513475.3308.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: Thesensor cablelenght can beincreased bythe user until200 metersusing2x24AWGcable.
PROTECTIVE VINYL:
This adhesive vinyl (included inside the packing) protects the instruments against
water drippings,as in commercialrefrigerators, for example.Do the applicationafter
finishing theelectrical connections.
Remove the protective paper
and applythe vinyl onthe entire
superior part of the device,
folding theflaps asindicated by
the arrows.
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