Page 10
Operation and Maintenance Instructions
THE NEW EcoHeater
DSEH180401.00.EN
Continuous product development may give rise to specification changes without notice.
Control
The EcoHeater has a factory-set time programme for continuous operation at
one speed. The time programme can be changed in the processing unit for con-
trol at up to three fan speeds.
In case of malfunction of FF (extract air fan), an alarm sounds and the unit stops.
The EcoHeater must be interlocked via circulation pump CP1.
If GT6 (temperature sensor water in) registers a temperature that is too high, the
compressor stops. It restarts automatically when the temperature falls to the
permitted value.
If EP1 (pressure sensor cooling circuit) and/or GT4 (temperature sensor exhaust
air) register a temperature that is too low, the compressor’s speed is reduced
until the temperature reaches the permitted value.
If OP1 (high pressure sensor cooling circuit) registers a condensation tempera-
ture that is too high, the speed of the compressor is reduced.
If GT4 (temperature sensor exhaust air) is lower than 12
°
C, the compressor can-
not be started.
If GT4 (temperature sensor exhaust air) is more than 3
°
C lower than GT2 (tem-
perature sensor extract air), the compressor cannot be started.
If GF1 (water flow sensor) registers too low flow, the compressor cannot be
started.
Compressor protection
In case of an alarm from F0 (frequency inverter) or HP1 (high pressure switch),
the compressor stops. The high pressure switch is reset manually.
Temperature control
Heat demand from EcoHeater can be controlled via external control signal (0-
10 VDC from the district heating central unit) so that full capacity from the heat
pump is utilised before district heating is used.
Alternatively, EcoHeater can be controlled via an internal radiator curve or an
external tank temperature.
Pressure control
Pressure control can be used by GP4 maintaining a constant pressure in the
extract air duct.
If the duct pressure deviates from the setpoint after a set time, an alarm sounds.
The current air flow can be read from the hand-held terminal.
Smoke/fire
If GT2 (temperature sensor extract air) registers a temperature higher than the
set alarm limit, a smoke/fire alarm sounds.
Communication
Communication via Modbus TCP/IP and text-web included as standard.
