Operating instructions

!
Installing and Operating Instructions
Vinotemp 1/3
Digital controller with off cycle defrost and
Fan Control
CONTENTS
1. GENERAL WARNING ____________________________________________________1
2. GENERAL DESCRIPTION ________________________________________________1
3. CONTROLLING LOADS __________________________________________________1
4. FRONT PANEL COMMANDS ______________________________________________1
5. MAX & MIN TEMPERATURE MEMORIZATION _______________________________1
6. MAIN FUNCTIONS ______________________________________________________2
7. PARAMETERS _________________________________________________________2
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS____________________________2
11. INSTALLATION AND MOUNTING __________________________________________3
12. ELECTRICAL CONNECTIONS _____________________________________________3
13. HOW TO USE THE HOT KEY______________________________________________3
14. ALARM SIGNALS _______________________________________________________3
15. TECHNICAL DATA ______________________________________________________3
16. CONNECTIONS_________________________________________________________3
17. DEFAULT SETTING VALUES______________________________________________3
1. GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
• This manual is part of the product and should be kept near the instrument for easy and
quick reference.
• The instrument shall not be used for purposes different from those described hereunder. It
cannot be used as a safety device.
• Check the application limits before proceeding.
1.2 SAFETY PRECAUTIONS
• Check the supply voltage is correct before connecting the instrument.
• Do not expose to water or moisture: use the controller only within the operating limits
avoiding sudden temperature changes with high atmospheric humidity to prevent formation
of condensation
• Warning: disconnect all electrical connections before any kind of maintenance.
• Fit the probe where it is not accessible by the End User. The instrument must not be
opened.
• In case of failure or faulty operation send the instrument back to the distributor
with a
detailed description of the fault.
• Consider the maximum current which can be applied to each relay (see Technical Data).
• Ensure that the wires for probes, loads and the power supply are separated and far enough
from each other, without crossing or intertwining.
• In case of applications in industrial environments, the use of mains filters (our mod. FT1) in
parallel with inductive loads could be useful.
2. GENERAL DESCRIPTION
Model 30 format 32 x 74 mm, is a digital thermostat with off cycle defrost designed for
refrigeration applications at normal temperature. It provides two relay outputs, one for the
compressor, the other one can be used as light, for alarm signalling or as auxiliary output.. It is
also provided with 1 or 2 NTC probe inputs the first one for temperature control, the second one,
optional, to connect to the HOT KEY terminals to signal the condenser temperature alarm or to
display a temperature. The digital input can operate as third temperature probe.
The HOT KEY output allows to connect the unit, by means of an external module, to a network
line compatible.
It allows to program the controller by means the HOT KEY programming keyboard.
The instrument is fully configurable through special parameters that can be easily programmed
through the keyboard.
3. CONTROLLING LOADS
3.1 COMPRESSOR
The regulation is performed
according to the temperature
measured by the thermostat probe
with a positive differential from the
set point: if the temperature
increases and reaches set point plus
differential the compressor is started
and then turned off when the
temperature reaches the set point
value again.
Time
Temper.
Compr.
SET
ON
In case of fault in the thermostat probe the start and stop of the compressor are timed through
parameters “COn” and “COF”.
3.2 DEFROST
Defrost is performed through a simple stop of the compressor. Parameter “IdF” controls the
interval between defrost cycles, while its length is controlled by parameter “MdF”.
4. FRONT PANEL COMMANDS
: To display target set point; in programming mode it selects a parameter or confirm an
operation.
(DEF) To start a manual defrost
(UP): To see the max. stored temperature; in programming mode it browses the parameter
codes or increases the displayed value.
(DOWN) To see the min stored temperature; in programming mode it browses the
parameter codes or decreases the displayed value.
O/I To turn ON or OFF the controller (if enabled)
KEY COMBINATIONS:
+ To lock & unlock the keyboard.
+ To enter in programming mode.
+ ! To return to the room temperature display.
4.1 CONTROL OF EVAPORATOR FANS
The fan control mode is selected by means of the “FnC” parameter:
FnC = C_n: fans will switch ON and OFF with the compressor and not run during defrost;
FnC = o_n fans will run even if the compressor is off, and not run during defrost;
After defrost, there is a timed fan delay allowing for drip time, set by means of the “Fnd”
parameter.
FnC = C_Y fans will switch ON and OFF with the compressor and run during defrost;
FnC = o_Y fans will run continuously also during defrost
An additional parameter “FSt” provides the setting of temperature, detected by the evaporator
probe, above which the fans are always OFF. This is used to make sure circulation of air only if
his temperature is lower than set in “FSt”.
4.1.1 Cyclical activation of the fans with compressor off.
When Fnc = c-n or c-Y (fans in parallel to the compressor), by means of the Fon and FoF
parameters the fans can carry out on and off cycles even if the compressor is switched off. When
the compressor is stopped the fans go on working for the Fon time. With Fon =0 the fans remain
always off, when the compressor is off. This increases humidity in the system.
4.2 USE OF LEDS
Each LED function is described in the following table.
LED
MODE
FUNCTION
ON
Compressor enabled
Flashing
Anti-short cycle delay enabled
ON
Defrost enabled
ON
An alarm is occurring
°C/°F
ON
Measurement unit
°C/°F
Flashing
Programming phase
5. MAX & MIN TEMPERATURE MEMORIZATION
5.1 HOW TO SEE THE MIN TEMPERATURE
1. Press and release the n key.
2. The “Lo” message will be displayed followed by the minimum temperature recorded.
3. By pressing the n key again or by waiting 5s the normal display will be restored.