ECH 200 BD
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If Pa H05= 3, the compressor will be turned off and on depending on the status of input AI1.
If Pa H06= 2, the compressor will be turned off and on depending on the status of input AI2.
If a digital input is configured as a second step request (H18 or H19 or H20 or H21= 6), the response will depend on this
input. This function is active only if Pa H05= 3 or Pa H06= 2.
REGULATION ALGORITHM IN HEAT MODE
If probe AI1 (analogue inputs) is not configured as a digital input for requests for heat (Pa H05=2) or as a digital input for
regulation algorithm requests (Pa H05=3), compressor management will depend on:
• temperature AI3 (analogue inputs), if configuration parameter ST3 Pa H07= 5 (for water-water machines with
water reversal)
• otherwise, temperature AI1(analogue inputs)
• a HEATING SET POINT which may be set from the keyboard
• AI1 = temperature of inlet water or inlet air
• SET HEATING= Heating set point set using the keyboard
• Pa C04 = hysteresis of heating thermostat
• Pa C05 = Delta of step intervention
Power: power Step 1: Step 1
Step 2: Step 2 Temp AI1/AI3: temperature from probe linked in AI1or
in AI3
Pa C04: hysteresis of heating thermostat Pa C05: Power algorithm step intervention differential
If Pa H05= 2 or 3, the compressor will be turned off and on depending on the status of input AI1.
If a digital input is configured as a second step request (Pa H18 or Pa H19 or Pa H20 or Pa H21= 6), the response
depends on this input. This function is active only if Pa H05= 2 or 3.
A compressor will always be off if:
• It is not associated with a relay (power outputs)
• The compressor has been shut down (refer to table of alarms)
• Safety timing is in progress
• The boiler is on
• The time lapse between pump on and compressor on is in progress (safety timing)
• Preventilation is in progress in cooling mode
• Ech 200 is on stand-by or off
• The parameter for configuration of probe AI1 Pa H05 = 0 (probe absent)
8.5.2 Condensation fan control
Condensation control depends on the condensation temperature or pressure for the circuit.
Fan control will be on if:
• at least one probe per circuit is configured as a condensation probe (pressure or temperature); if not, the fan for the
circuit will come ON and go OFF in response to the circuit compressors.
Fan control may be independent of the compressor, or it may be carried out in response to requests from compressors;
Operating mode is determined by parameter Pa F05:
Value
0 1
Pa F05:
fan output mode
if compressor is off, fan is off condensation control independent of
compressor
When the compressor is started up, if the proportional control requests fan cut-off, the cut-off may be excluded for an
amount of time equal to Pa F12 beginning when the compressor is turned on. If the controller requests cut-off during this
time period, the fan will run at minimum speed.
Regulation
algorithm in heat
mode
Heating diagram
Pa C04Pa C04
Pa C05
Power
Temp AI1/AI3
Step 2
Step 1
SET POINT
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