Lodam LMC 320, User Manual

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. 1.0 - 11.10.10
to allow heat to be created.
A low limit ambient temperature can be set and below this
temperature the fan / brine pump will run continuously even if the
heat pump is stopped. Default this setting is off.
There is also a high limit ambient temperature for the fan / brine
pump. Above this setting the continuous operation of the fan/brine
pump is cancelled.
Aux pump control
The aux pump is used for circulating heating water from the heating
accumulator tank to the radiators in the building.
Pump exercise function
If a pump is standing still for longer periods, dirt and minerals can
grow so solid the pump is sticking. To prevent this, the pumps are
exercised at regularly intervals for short time, default 15 s. The interval
can be adjusted.
Freeze protection
The controller has anti-freeze protection functions to prevent
damages to the installation. These anti-freeze functions are always
active including in the Off-mode. Malfunctioning sensors could
prevent these functions to work.
• If the ambient temperature drops below 2 °C, the circulation pump
for central heating is started. Hereby the installation in cold areas is
secured and the water temperature can be monitored.
• If hot tap water temperature or heating water temperature
drops below 2 °C, all circulations pumps are started together with
the heat pump and supplemental heating to try to raise the water
temperatures above 5 °C.
A warning, AL604 Frost protection will be set if the start condition is
set but there is no temperature rise.
Minimum evaporator/brine temperature limiter
If the brine temperature of the brine gets too low, there is a risk of
freezing the brine and thereby damaging the installation. If this limit
is reached, the heat pump is turned off but the pump is kept running
constantly.
Functions