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TECHNICAL DATA

Power supply

BIT25...E 230Vac±10%, 50/60Hz, 3W

BIT25...U 115Vac±10%, 50/60Hz, 3W

BIT25…W 100…240Vac±10%, 50/60Hz, 3W

Relay output max loads

Compressor 12(12)A 240Vac

Auxiliary loads 1 16A 240Vac

Auxiliary loads 2 4A 240Vac

Input

NTC 10KΩ@25°C Intermatic Part No. SN4...

Measurement Range

-50 / -9.9 … 19.9 / 110°C

-50…110°C, -58…180°F

Measurement accuracy

<0.5°C within the measurement range

Operating conditions

-10 … +50°C; 15%...80% r.H.

CE (Approvals and Reference norms)

EN60730-1; EN60730-2-9; EN55022 (Class B);

EN50082-1

IISM = MAN or DI2

IISL

-50... IISH

Minimum limit for IISP setting .(-25°C)

IISH

IISL... 110°C

Maximum limit for IISP setting .25°C)

IISP

IISL... IISH Setpoint in mode 2 .(5°C)

IIHY

1.0... 10.0°C OFF/ON differential in mode 2 .(3°C)

IIFC

NON;

TMP;

TIM

Fan control in mode 2. See FCM .(NON)

IIDF

0...99 hours Built-in timer value for an automatic defrost to take place, in mode 2 (0).

NO/YES

Stand-by button enabling (YES).

DI1

NON;

DOR;

ALR;

RDS.

DI1 digital input operation (NON)

NON : digital input 1 not active.

DOR : door input.

ALR : when contact opens an alarm is generated (if AHM=STP, the compressor is stopped and defrosts are

suspended).

RDS : when contact makes a defrost is started (remote control).

DI2

NON;

DOR;

ALR;

RDS;

IISM;

T3;

PSP

DI2 digital input operation (NON)

NON : digital input 2 not active.

DOR : door input.

ALR : when contact opens an alarm is generated (if AHM=STP, the compressor is stopped and defrosts are

suspended).

RDS : when contact makes a defrost is started (remote control).

IISM : when contact makes the second parameter group is active.

T3 : probe T3 input.

PSP : potentiometer setpoint input.

DI2 = T3

T3M

DSP;

CND.

Auxiliary probe T3 operation (DSP)

DSP : temperature T3 to be displayed.

CND : condenser temperature measurement.

OS3

-12.5..12.5°C Probe 3 offset .(0°C)

DI2 = PSP

PSL

-50...70°C Minimum setpoint adjusted via potentiometer .(0°C)

PSR

0.0...15.0 °C Range of setpoint adusted via potentiometer (0°C)

Example: with PSL=2.0 and PSR=8.0, the setpoint changes between 2.0°C and 10.0°C (PSL+PSR).

POF

NO/YES Potentiometer standby enabling .(NO)

With POF=YES, when the potentiometer is turned to the minimum, the controller will be put on standby.

LSM

NON;

MAN;

D1O;

D2O;

D2C.

Light control mode (NON)

NON : light output not controlled.

MAN : light ouput controlled through button

D1O : when DI1 is open, light output is on.

D2O : when DI2 is open, light output is on.

D2C : when DI2 is closed, light output is on.

OA1

NON;

FAN;

DEF;

LGT;

0-1;

ALO;

ALC

AUX 1 output operation (NON)

NON : output disabled (always off).

FAN : output enabled for fan control.

DEF : output enabled for defrost control.

LGT : output enabled for light control.

0-1 : the relay contacts follow the on/standby state of controller.

ALO : contacts open when an alarm condition occurs.

ALC : contacts make when an alarm condition occurs.

OA2

See OA1 AUX2 output operation. See OA1 .(NON)

OS1

-12.5..12.5°C Probe T1 offset (0°C).

NO/YES Probe T2 enabling (evaporator) .(NO)

OS2

-12.5..12.5°C Probe T2 offset (0°C).

TLD

1...30 min Delay for minimum temperature (TLO) and maximum temperature (THI) logging .(5)

SCL

1°C;

2°C;

°F

Readout scale .(2°C)

1°C : measuring range -50…110°C (0.1°C resolution within -9.9 ÷ 19.9°C interval, 1°C outside)

2°C : measuring range -50…110°C

°F : measuring range -58…180°F

SIM

0...100 Display slowdown .(3)

ADR

1...255 BIT25 address for PC communication .(1)

WIRING DIAGRAMS

BIT25B1S3E-B

Power

Supply

L2/Neutral

data I/O

RS485

PC comm.

16A

12(12)A

Max total current 16A

remote

AUX 1

DI 2

DI 1

AUX 2

T2 T1

LCD-5S

4 1 2

16 15

1211

OPERATION

DISPLAY

During normal operation, the display shows either the temperature measured or one of the following indications:

Defrost in progress Room high temperature alarm

Controller in stand-by Room low temperature alarm

Condenser clean warning Probe T1 failure

Door open alarm Probe T2 failure

Condenser high temperature alarm Probe T3 failure

Generic Alarm

INFO MENU

The information available in this menu is:

Instant probe 1 temperature Minimum probe 1 temperature recorded

Instant probe 2 temperature

Compressor working weeks

Instant probe 3 temperature Keypad state lock

Maximum probe 1 temperature recorded

*: displayed only if enabled (see §Conﬁguration Parameters) ** : displayed only if ACC > 0

Access to menu and information displayed.

■Press and immediately release button .

■With button or select the data to be displayed.

■Press button to display value.

■To exit from the menu, press button or wait for 10 seconds.

Reset of THI, TLO, CND recordings

■With button or select the data to be reset.

■Display the value with button .

■While keeping button pressed, use button .

STAND-BY

Button , when pressed for 3 seconds, allows the controller to be put on a standby or output control to be resumed (with SB=YES only).

KEYPAD LOCK

The keypad lock avoids undesired, potentially dangerous operations, which might be attempted when the controller is operating in a public place. In the INFO

menu, set parameter LOC=YES to inhibit all functions of the buttons. To resume normal operation of keypad, adjust setting so that LOC=NO.

SELECTION OF SECOND PARAMETER GROUP

It’s possible to select control parameters between two different pre-programmed groups, in order for the fundamental control parameters to be adapted

quickly to changing needs. Changeover from Group I to Group II (and vice versa) may take place MANUALLY by pressing button for 2 seconds (with

IISM=MAN), or AUTOMATICALLY when IISM=DI2 and the AUXILIARY INPUT DI2 is activated (the activation of DI2 selects Group II). If IISM=NON, switchover

to Group II is inhibited. The activation of Group II is signalled by the lighting up of the relevant LED on the controller display.

SETPOINT ADJUSTMENT VIA POTENTIOMETER

With DI2=PSP the setpoint is set via a 10KΩ linear potentiometer connected to DI2. The setpoint changes between PSL (10KΩ) and PSL+PSR (0Ω)

proportionally. With POF=YES, if the potentiometer is turned to the minimum (0Ω), the controller will be put on standby. If the second parameter group is

active, the setpoint used will be IISP.

DEFROST

Automatic defrost. DFT Defrost starts automatically when the defrost timer matches the time value set with .

Timed defrost =TIM defrosts take place at regular intervals of DFT hours. For example, with =TIM and =06, a defrost will take place . With DFM DFM DFT

every 6 hours.

Optimized defrost. =FRO the timer is increased only when the condition for frost to form in the evaporator occurs. Once the value is reached, With DFM DFT

defrost takes place. If the evaporator works at 0°C, defrost frequency depends on the thermal load and climatic conditions. With setpoints much lower than

0°C, defrost frequency mainly depends on the refrigerator operating time.

Defrost time count backup. At the power-up, if =YES, the defrost timer resumes the time count from where it was left off befoDFB -

re the power interruption. Vice versa, with =NO, the time count re-starts from 0. In stand-by, the accumulated time count is frozen.DFB

Manual or remote defrost start. It’s possible to manually start a defrost, by pressing button for 2 seconds, or defrost may be started remotely, if

DI1 DI2=RDS ( =RDS), through the making of the auxiliary contact DI1 (DI2).

Defrost type. Once defrost has started, Compressor and Defrost outputs are controlled according to parameter DTY. If =YES, the evaporator fans are FID

active during defrost.

Defrost termination. The actual defrost duration is inﬂuenced by a series of parameters.

Time termination: =NO. the evaporator temperature is not monitored and defrost will last as long as time T2 DTO.

Temperature termination: =YES. In this case, if the sensor T2 measures the temperature before the time elapses, defrost will be terminated in T2 DLI DTO

advance.

Resuming thermostatic cycle. When defrost is over, if is greater than 0, all outputs will remain off for DRN minutes, in order for the ice to melt DRN

completely and the resulting water to drain. Moreover, the fans will re-start only when the evaporator temperature is lower than (if =YES), or after FDD T2

FTO minutes have elapsed.

Caution: if =NON all defrost functions are inhibited; if =0, automatic defrost functions are excluded; during a high pressure alarm or a DI1 (DI2) DFM DFT

generic alarm, defrost is suspended; during defrost, high temperature alarm is bypassed.

CONFIGURATION PARAMETERS

■To get access to the parameter conﬁguration menu, press button + for 5 seconds.

■With button or select the parameter to be modiﬁed.

■Press button to display the value.

■By keeping button pressed, use button or to set the desired value.

■When button is released, the newly programmed value is stored and the following parameter is displayed.

■To exit from the setup, press button or wait for 30 seconds.

INSTALLATION

■The BIT-25 controller has a size 87x83x40 mm (WxHxD).

■Make sure that electrical connections comply with the paragraph “wiring diagrams”. To reduce the effects of electromagnetic disturbance, keep the

sensor and signal cables well separate from the power wires.

■Place the probe T1 inside the room in a point that truly represents the temperature of the stored product.

■If present, place the probe T2 on the evaporator where there is the maximum formation of frost.

■If probe T3 is connected to DI2, its function is determined by the parameter T3M. With T3M=DSP the probe measures the temperature to be displayed.

With T3M=CND the probe measures the condenser temperature, it must therefore be placed between the ﬁns of the condensing unit.

Thermostat output

Fan output

Alarm

Defrost output

Activation of 2nd parameter set

Info / Setpoint button

Fig.1 - Front panel

Manual defrost / Decrease button

Increase button / Manual activation

Exit / Stand-by button

DESCRIPTION

INDICATIONS

BIT25 INSTRUCTIONS FOR USE

SETPOINT : display and modiﬁcation

■Press button for at least half second, to display the setpoint value.

■By keeping button pressed, use button or to set the desired

value (adjustment is within the minimum SPL and the maximum SPH limit).

■When button is released, the new value is stored.

70 mm

87 mm

104 mm

95 mm

83 mm

40 mm

DI2 as input for T3

probe (DI2=T3)

DI2 as input for setpoint

potentiometer adjustment

(DI2=PSP)

DI2

Thank you for having chosen an Intermatic electronic product. Before installing the instrument, please read this instruction booklet carefully in order to

ensure safe installation and optimum performance.