Eberle EM 524 89 Assembly And Operating Instructions Manual - Operating:
Operating:
If the temperature set in the ice detector falls below the predetermined value and if the
set humidity is exceeded at the same time, the heating will be switched on by means of
the HEATER relay and the terminals 8 and 9 (see connection diagram). If one of these
conditions is not fulfilled the heating will remain off.
The open space or the gutter heating remains switched on until the set humidity falls
below a predetermined value or the set temperature is exceeded,
If the post purge heating function is needed (generally only if there is still snow remaining
on the sides after the heating has been switched off) you can recall this function by
pressing the MENU-button and the desired time set. The post purge heating process takes
over before the EM 524 89 switches the heating off again, as the temperature or the
humidity no longer meet the conditions to be switched on.
The lower temperature limit is set (–5°C…–20 °C, OFF) in the RANGE menu item
The upper temperature limit is fixed at +6°C. Outside this limit the heating can only be
switched on using the CONTINUOUS HEAT menu item.
The surface of the ice and snow sensors ESF 524 001/011 and ESD 524 003 is heated
intermittently to, for example, thaw snow and ice. Water is formed that the sensor will
identify as humidity.
The BASE TEMP menu item has a setting range of –15°C....–1°C and OFF. This base
temperature is, for example, –5 °C and has to keep the surface to be heated from falling
below the preset value of –5 °C. If the temperature falls below this preset value, the
heating will be switched on until this temperature is exceeded. The lower temperature
limit has priority over the base temperature. This means that if the base temperature is
set lower than the limit temperature, the base temperature cannot be maintained as the
ice detector will be already be in “stand-by” mode.
Please take note:
The higher the set temperature, the higher the heating costs will be.
Design
The equipment consists of the central control unit EM 524 89, the separate ice and snow
sensor ESF 524 001/011 and the combined temperature and moisture sensor
TFF 524 002/012 for open space heating e.g. the ice and snow sensor ESD 524 003 and the
temperature sensor TFD 524 004 for gutter heating. Additionally, the TFD 524 004 sensor
can be connected as an air temperature sensor and to detect when there is a drop in
temperature.
9
Attention
The sensors are operated with safety extra low voltage. The appropriate regulations
for safety extra low voltage are to be adhered to. In order to ensure trouble -free
operation, we recommend that the sensor cables are laid at a sufficient distance
from the load circuit and power supply lines.