INTRONICS
P/N 170195-000E Rev. 00 1
FT-101, FT-102
Freezer Thermostat
INSTALLATION MANUAL
1. APPLICATION
FT-01 and FT-102 are the freezer thermostat with precise temperature control and all enhanced features
such as Defrost, Compressor delay protection, etc. The size is according to DIN standard.
FT-101 is equipped with 1 temperature sensor while FT-102 is equipped with 2 sensors, temperature
and defrost sensors.
FT-101 FT-102
Compressor relay (A) 8(3)
1
8(3)
Fan relay (A) - 8(3)
Defrost relay (A) - 8(3)
Light relay (A) 8(3) -
Remark : 1. Relay’s rating is 8A resistive load and 3A inductive load.
2. FEATURES
2.1 TEMPERATURE SETTING
q Press and hold button for 3 seconds, the display will change from showing the
temperature inside the freezer to be the setting temperature in blinking.
q Press or button for temperature setting.
Note : The temperature range can be selected see Program 01 & 02 of Section 3.
2.2 COMPRESSOR OPERATION
The compress will be turned on if
Temp. inside freezer (T) ³ Setting temp. (T
set
) + Hysterisis temp. (T
hys
)
Hysterisis temperature can be chosen in a range of 1 - 9 °C , see Program 03 of Section 3.
INTRONICS
P/N 170195-000E Rev. 00 2
2.3 DEFROST
Defrost processor are different in models FT-101 & FT-102. They are
FT-101
Enter into defrost process While in Defrost process Exit from Defrost process
q Press button to start process
or the Defrost cycle is reached
q Compressor stops q Defrost duration is
reached
Note :
q Defrost cycle can be set in a range of 0-15 hours (0 = no activate), see Program 04 of
Section 3.
q Defrost duration can be set in a range of 5-60 minutes, see Program 05 of Section 3.
After exiting from the process, the compressor is automatically turned on.
FT-102
This model has an extra Defrost sensor and relay to turn on/off the heating equipment for Defrost
process. In case no heater this model can also be used. See Program 09 of Section 3.
Heater
installed
Enter into
Defrost process
While in
Defrost process
Exit from
Defrost process
Yes
q Press button to start
process or the Defrost
cycle is reached
q Compress and fan stop
q Heater is turned on
q Defrost cycle is
reached or
T
coil
³ T
stop defrost
No
q Press button to start
process or the Defrost
cycle is reached
q Compressor stops
q Fan is ON
q Defrost cycle is
reached or
T
coil
³ T
stop defrost
Note : T
stop defrost
can be programmed, see Program 06 of Section 3.
After existing from the process
q Heater stops.
q Compressor is ON.
q In case of heater installed, the fan will start after the duration set in Program 07, Section 3.
2.4 LIGHT (MODEL FT-101 ONLY)
Press and buttons to turn on/off the light inside the freezer.
2.5 COMPRESSOR DELAY
Compressor delay time can be programmed in a range of 1-5 minutes, see Program 08 Section 3.
2.6 FAN MODE (MODEL FT-102 ONLY)
Fan can be programmed to operate with the same sequence of compressor (Auto) or operate
continuously (Con), see Program 10 section 3.
INTRONICS
P/N 170195-000E Rev. 00 3
2.7 KEYBOARD LOCK
To lock/unlock the keyboard is by pressing and at the same time for 3 seconds.
2.8 SENSOR ERROR
q If the temperature sensor is failed (open or short circuit), the alarm E1 is displayed and the
compressor will be turned on 5 minutes and turned off 5 minutes in sequence.
q If the defrost sensor is failed (open or short circuit), the alarm E2 is displayed.
2.9 MEMORY
All setting parameters are kept in the non-volatile memory.
3. PROGRAMING
There are 10 programs for parameter setting.
Program Description Range
01 Lowest temperature setting
³ – 50 °C
02 Highest temperature setting
£ 40 °C
03 Hysterisis temperature setting (T
hys
)
1 – 9 °C
04 Defrost cycle time setting 0 – 15 hours (0 = not activate)
05 Defrost duration setting 5 – 60 minutes
06 Stop-defrost temperature setting
0 – 15 °C
07 Fan delay time setting after defrost 0 – 10 minutes
08 Compressor delay time 1 – 5 minutes
09 Heater installed
or
10 Fan mode (Auto or continuous)
or
Programing can be done as follows :
a) Press and hold and buttons at the same time for 3 seconds, the display will show ProG,
b) Press button, the display will show Program Number, such as P01,
c) Press or button until the Program Number required is shown,
d) Press button,
e) Press or button for parameter setting,
f) Press button to confirm, the display will show next Program Number,
g) Repeated (c) to (f) for other parameter setting.
Note : If no button is pressed within 10 seconds, it will automatically exit from the programing process.
INTRONICS
P/N 170195-000E Rev. 00 4
4. INSTALLATION
Take out the spring lock Making the 30X71 mm. hole at the freezer
Insert the thermostat Put the spring back and push until it is locked
Wiring diagram
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