Mandik Climatix, Operating Instructions Manual

Page: 37 / 83

KJM MANDÍK
–
Detailed operating instructions
M&C KJMPNO 07/2022
MANDÍK, a.s.,
www.mandik.cz
37

TempWtr – heating water temperature is lower than the set required or low
temperature.

Preheat – preheating is in progress to ensure the heat exchanger is heated before the
fans are started.

Frost – thermostatic frost protection of the water exchanger is active, heating is on.

Err – specific fault is listed in the alarm messages, heating is on.

Pump – displays information about the contact controlling the heating pump.

Off – water heating pump contact is open.

On – water heating pump contact is switched on.

Power (%) – current opening of the water heating valve.

PID–Regulation – factory default values are: TI = 120 s, KP = 6, TD = 0 s .

HeatingWaterSupplied ( °C) – current heating water temperature before the heat exchanger.

HeatingWaterDrain ( °C) – current temperature of the heating water after the heat
exchanger.

LowTempWater (12 °C) – drain water temperature limit value used as operational protection
of the water heating when the unit is switched on (pump on). If the heating water
temperature is lower, then the valve opens and fan speed compensation is activated until the
temperature rises above the NecessaryWaterTemp value.

NecessaryWaterTemp (20 °C) – discharge water temperature limit at which the water heating
output will change to the setpoint and and the next heating component will turn on in the
order of.

Preheat (0%) – ensures temperature-friendly start-up of the unit in cold periods. The current
output calculated by the preheat function is displayed. It consists of two sequences with the
following parameters:

High (–10 °C, 100%) – minimum outdoor temperature at which the valve opens to 100%
after preheat starts.

Low (5 °C, 50%) – maximum outdoor temperature at which the valve will open to 50%
after preheat starts.

On (180s) – duration of the first sequence where the fans start, the pump turns on, and a
fixed valve opening value is set based on the outdoor temperature and UG and OG
parameters. Between these cut-off temperatures, the fixed valve opening is set linearly.