© TALLERES DEL AGUA S.L. 2008. TODOS LOS DERECHOS RESERVADOS. DOCUMENTO CONFIDENCIAL Y EN PROPIEDAD.
Page 38 of 53
DIGITAL ELECTRONIC REGULATOR,
OSAKA OT31 AZ
I. GENERAL DESCRIPTION
OT 31 Z / OT 31 Al OT model is a digital regulator which is used in cooling applications, includes
an ON / OFF type temperature control and a defrost control with time intervals by compressor
stops. The regulator contains a relay output and a configurable input for a temperature probe type
PTC or NTC. It has four programming keys, a 4-digit display and 2 info leds. Other features are:
Programming parameters protection through personal password, switch on and of (stand-by) by
means of “F” key, configuration of the devices parameters through COPY KEY and input within
100…240 VAC.
II. FRONTAL DISPLAY DESCRIPTION
1 - SET key: Allows setting a set point and operating parameters.
2 - DOWN key: Allows decreasing programming values and parameters selection.
3 - UP/DEFROST Key: Allows to increase programming values, parameters selection and to
activate manual defrost.
4 - F Key: Programmable by the “USrb” parameter to act as ON / OFF (Stand-By). In hidden
parameters programming mode, is used to modify parameters visibility.
5 - Led SET: Indicates being in programming mode and programming parameters level. In
addition, indicates that the equipment is in stand-by mode.
6 - Led OUT: Indicates the compressor output state (or temperature device control): ON, OFF and
INHIBITED.
7 - Led DEF: Indicates that defrost is running.
III. PROGRAMMABLE PARAMETERS MATRIX
Parameters Description Range Default
1 SPLL Minimum Set Point -58.0 + SPHL 5
2 SPHL Maximum Set Point SPLL + 302.0 60
3 SEnS Probe type Ptc – ntc Pct
4
OFS Probe calibration -30.0 + 30.0
ºC / ºF
0.0
5 Unit Unit of measurement ºC - ºF ºC
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