KJM MANDÍK
–
Detailed operating instructions
M&C KJMPNO 07/2022
MANDÍK, a.s.,
39
Electric heating
6.8
Electric heating is controlled based on the selected regime and required temperature in
conjunction with temperature sensors. The fans are switched on as a condition for switching on
the electric heater. The electric heating control is ready for modulating and non-modulating
heaters.
Protective functions are provided by the emergency thermostat, which switches off the
power supply to the electric heater in case of overheating, and this condition is signalled to the
controller, which performs the total cooling of the electric heat exchanger. Do not turn off the
power to the AC unit (supply fan) while the electric heater is running! It will overheat!
If the electric heater fails, the fan speed may decrease after the heat exchanger has cooled
down when the parameter
ComponentsMachine
Fans
HeatErr
=
Compensation
. This
condition is indicated as
AuxilieryMode
–
CompenssationSpeed
on the controller display in the
main menu.
State
– displays information about the electric heating operation.
Ready
– electric heating is not used.
Heat
– electric heating is in the heating regime.
Err
– electric heater contactor is open when heating is required, heating is off.
Heating
– displays information about the contact controlling the heating contactor.
Off
– contact for the electric heater contactor is open.
On
– contact for the electric heater contactor is open.
Power
(%) – current electric heater output.
ContactorOn
(
No
/
Yes
)
– it is only relevant for modulating electric heaters and enables the
contactor to turn on for the duration of the heating regime even if the modulation signal is
zero. The purpose is to reduce wear and tear of the contactors.
MaxPower
(100%)
– here the maximum power limit of the electric heater can be set. This
function is usually used when the fan power is reduced and the electric heat exchanger is
overheating.
PID–Regulation
– the default factory set values are:
TI = 120 s, KP = 6, TD = 0 s.
kW/
Section
(kW)
– total power input value of the electric heater. It is meaningful only for
energy balance.
