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Compensation heat deficit
This function compensates for excess heat and
heatdeficits. These can occur in the following
situations:
Minimum compressor on and off times
In the case of low temperature requests, the flow
temperature can lie below the required setpoint,
but the return temperature may not drop below the
switch-on point for a longer period of time. In this
situation, the heat pump must be switched on to
prevent heat deficits
The controller compares continuously the flow
temperature setpoint with the actual value and
integrates the surplus heat and heat deficits.
Differences are compensated for by extending the
compressor on and off times.
If the compressor is not switched on or off due to
surplus heat/heat deficits, the controller displays an
appropriate status message.
This function is not active during the time the DHW
storage tank is charged.
The function is not active either in the case of plants
with buffer/(combi) storage tanks.
"Compensation heat deficit" only acts in heating
mode. The parameter is inactive in cooling mode.
The maximum switch-off temperature is given
priority over the "Compensation" function.
In the case of sudden setpoint changes, both
integrals are cleared.
Behavior in connection with the "Floor
•
curing" function
When activating the "Floor curing" function, the
integral is set to a level representing 1.5 times the
predefined value (factory setting). If the current
temperature lies at least 2 K below the required
setpoint, the heat pump is immediately switched on.
If compensation of surplus heat/heat deficits shall
act "Only with floor curing fct", the respective setting
must be selected. This means that the parameter is
deactivated in normal heating mode.
Calculation of integral
•
If a flow temperature sensor (Bx1) is connected
and the heating curve is set to the flow temperature
setpoint, the controller uses the flow temperature
and the flow temperature setpoint for computing the
integrals.
In the following situations, the integral is set to "0":
No valid temperature request delivered
Setpoint change >2 K
Frost protection for the heat pump is active
The heat pump has gone to lockout or cannot
deliver any heat for a longer period of time
The heat pump is in active cooling mode
A buffer storage tank is being charged
The function is deactivated
With active DHW charging, the integral value is
frozen.
With electrical utility lock
This setting relates to input EX1 (load-shedding or
peak day clearing) and allows the electric heaters to
be locked as follows:
•
Locked
The heat pump and all electric heaters are locked,
both heat pump stages and the DHW tank electric
heater.
Only the boiler backup, if installed, continues to
operate.
•
Released
The heat pump operates and all electric heaters are
locked, both heat pump stages and the DHW tank
electric heater.
The boiler backup, if installed, continues to operate.
- (CS01 - 42) -
- (CS01 - 42) -
Control system
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