KJM MANDÍK
–
Detailed operating instructions
M&C KJMPNO 07/2022
MANDÍK, a.s.,
47
Anti–FreezeProtection
– frost protection of the heat pump is provided by a manostat with
digital or analog output, monitoring air pressure before and after the heat exchanger at the
air outlet. If the heat exchanger freezes, the heat pump control may change. At the same
time, the fan speed can be adjusted according to parameter
ComponentsMachine
Fans
Defrost
= “
Compensation
”. The parameters of the recuperator frost protection are:
Press
(Pa) –
current pressure of the manostat with analog output.
OG
(Pa) –
pressure value at which the heat pump frost protection is activated.
Control
(
Reversing
/
No
)
– defines the behaviour of the heat pump during freezing:
Reversing
– changes the heating regime to cooling regime.
No
– keeps heating regime and expects defrost by compensating fan speed.
Recuperation
(
Off
/
On
)
– defines the behaviour of the recuperator during freezing:
Off
– recuperator will shut down when the heat pump freezes.
On
– recuperator stays on during freezing if it has not been turned off before.
Start (10s) –
time for which the digital compressor output will be 100% at start-up. The
minimum value should be 5 s. For a compressor with FM, this value must be 0 s.
MinPower
(25%)
– minimum output of the digital compressor. If
Start100% = 0 s
, then this
value does not apply.
PWM (20 s)
– pulse width modulation period to control the digital compressor.
Modbus
– if
1-MB
or
2-MB
is selected in the configuration for the heat pump, then selecting
this item will display the operating values of the EVD drivers to control the expansion valves:
EVD–Driver
– values displayed are used to control the operation of the heat pump
circuits:
ValveOpen
(%) –
current expansion valve.
EvaporatePress
(Bar) –
current evaporating pressure.
EvaporateTemp
(°C) –
current evaporating temperature.
SuperHeat
(K) –
current superheat temperature.
SuctionTemperature
(°C) –
current suction temperature.
AlarmsEVD
–
sum of the alarms from the EVD.
