Primary parameters:
3.3.2 Re-heating using electrical heating
The electrical heater may be controlled either via 0-10 V analogue signal or via digital relay outputs.
To maintain an adjustable set-point temperature, the electrical re-heating exchanger, optionally fitted to
the connecting flange for supply air, is controlled via a 0 –10 V signal to a Triac controller.
When controlled via one or two digital outputs, the heater may be controlled as follows:
Single stage
Two-stage
Binary via 2 relay outputs
The set value gives the PWW heater return flow temperature
at which the ventilator should be fully controlled.
The heating valve control will be activated at set value plus “Frost-
P-band”
The set value gives the PWW heater return flow temperature at
which the compact ventilation unit will stop and a frost alarm will be
triggered
PWW heater frost protection sets in at the set value plus the
“
Frost protection
”
parameter value (see graphic Page 12)
P-band for PI controller heating
I-time for PI controller heating
“Constant”. The circulating pump in the PWW heater will run
continuously when the Pichler Air2 Master is switched on.
“Auto”. The circulating pump in the PWW heater will
run when heating is required (valve setting >0.1%)
“Outside temperature”. The circulating pump in the PWW heater
will run when heat is required or when the outside temperature
drops below the value set in the “Pump start” parameter.
The pump will start when the outside temperature falls
below the set value.
“Pump operation” must be set to “Outside temperature”.
Set the control range of the motor-driven valve (0-10 V/2-10 V)
Frost protection
Frost alarm
Frost-P-band
P-band
I-time
Pump operation
Pump start
Motor-driven valve
Start-up heating
Initial heating in %. Heating power when switching from
standby to operation.
Stand-by heat
When stopping the ventilation system, the heating
valve will ensure that the return flow from the water
battery does not get below the set value.
Water temperature
Read actual return temperature.
Gainfactor, heat 1
Set gain factor for heating battery
O P E R A T I N G A N D I N S T A L L A T I O N I N S T R U C T I O N S L G
7 5 0 - L G 6 0 0 0
P A G E
1 6
