ID.: 17-16-20-2976-06 | 6.2017
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the buffer thank for DHW has a built-in anti-corrosion anode (Mg) which prevents rusting of the
buffer tank in the event of damage to the enamel.
Electric heater
The device is standard fitted with an electrical heater of 1.5 kW which serves as additional or
backup heat source.
Antifreeze sensor
The device’s controller has an air temperature sensor which performs a safety shut-down of
the device for a minimum of 30 minutes in case the temperature of the air flowing through the
evaporator of the device is lower than +5 °C.
Safety thermostat
The device has a safety thermostat which is set to 90 °C. This means if the water temperature
inside the buffer tank for DHW exceeds this limit, the electrical connection to the device will be
terminated and the device will cease to operate. You have to contact the authorised installer
for a renewed commissioning of the device to check and eliminate the cause of the safety shut
down of the device.
CAUTION
When heating with DHW or solar collectors, the water in the buffer tank can be
heated above 95 °C which will trigger a shut-down of the safety thermostat. In this
case the thermostat has to be manually reset. For a renewed commissioning of
the thermostat it is necessary to call the authorised installer.
Controlling the water temperature in the buffer tank for DHW
An advanced controller with the label OPTITRONIC is responsible for controlling water heating
to the desired temperature.
Depending on the set desired temperature of water, the controller turns the operation of the
compressor and fan on or off; in certain cases it also turns on or off the electric heater or
circulation pump of the DHW. The maximal temperature setting for heating water is 65 °C. If
the water in the buffer tank exceeds 90 °C, the controller turns off all heat sources connected
to it.
The minimal water temperature in the buffer tank for DHW is 7 °C.
High-pressure protection for the cooling system
To prevent high pressure in the cooling system and associated damage the device has a built-
in high-pressure safety switch which turns off the device in case of high pressure.
Operating conditions
The temperature of the surroundings in normal operation must be b5 °C and +35 °C.
The air must be clean, the relative moisture at +35 °C must not exceed 50 %. At lower air
temperatures the relative moisture can be higher. With devices installed at high altitudes, lower
air pressure can cause degraded performance of the device.
