Functional Description; Display - Pentair Raychem RAYSTAT-ECO-10 Manual Del Usuario

T sensor
Type:
Sensor head:
* An external Pt 100 sensor can be connected, the sensor cable can be
extended with a 3-core shielded cable of 20 Ω max. per conductor (e.g. up
to 150 m with a 3 x 1.5 mm² cable)

FUNCTIONAL DESCRIPTION

The Raystat-ECO-10 Controller is used to control heat-tracing freeze
protection systems based on ambient temperature. The controller adjusts
the power of the heating cable by energizing the circuit for a percentage
of a complete cycle. This percentage is determined based on the
ambient temperature, the set point, and the minimum expected ambient
temperature. The full cycle time is influenced by pipe diameter.
For example, if the ambient temperature is halfway between the
minimum expected ambient temperature and the set point, the heating
cable will be energized for 5 minutes and be off for 5 minutes (for the
smallest pipe size selected). The actual duty-cycle periods and ratios
vary, depending on the ambient temperature and the above mentioned
parameters. This algorithm is called Proportional Ambient Sensing
Control (PASC).
If you are unsure about the min. expected ambient setting, set it to a
higher rather than a lower value to prevent freeze-ups.
In the event of an error, the alarm relay switches and an error code shows
on the display. It is possible to program the status of the heating cable
(ON or OFF) in case of a sensor error.
The unit is fitted with a battery so that programming can be done on
the bench prior to mounting in the working location (see Operational
description, page 11).

DISPLAY

RAYSTAT-ECO-10 has a digital display. The three left hand digits 9a are
the value display and the right hand digit 9b is the status display.
3-wire Pt 100 according to IEC Class B
50 mm x Ø 6 mm
7