Overheating Protection; Heaters Cva With Integrated Controller; Description Of Operating Cva Mpi; Description Of Operating Cva Mpe - Cairox CVA M Series User Instruction

OVERHEATING PROTECTION

Two overheat protection thermostats are installed in the electrical circular heater CVA. The first one with
automatic reset, turns off the heating when the temperature reaches 50 °C and turns on when the temperature
drops below 50 °C. The second with manual reset, turns off the heating when the temperature reaches 100 °C. In
this case need to figure the cause of the overheating of the heater. Eliminate overheating cause, press „RESET"
button on heaters cover.
Additional overheating thermostat (with automatic reset) is installed in the CVA heater with ESKM to protect
the ESKM controller. This thermostat turns off the heating when the temperature reaches 70 °C and turns on when
the temperature drops below 70 °C.

HEATERS CVA WITH INTEGRATED CONTROLLER

Table 1. Technical characteristics of controller EKR-K...
Power supply depending on model
Power consumption in standby mode
Ambient temperature
Relative humidity

DESCRIPTION OF OPERATING CVA MPI ...

Electrical duct heaters CVA MPI ... are designed with integrated temperature control, one temperature sensor,
setpoint potentiometer knob is integrated on the heater lid.
When the heater power supply is switched on, LED 6 on the controller (EKR-K...) PCB (see Fig. 1 on page 4)
flashes once every 8 seconds if setpoint is 0 °C and every second if setpoint is higher than 0 °C. If controller turns on
the heating depending on the demand, LED 5 lights (see Fig. 1 on page 4).
Heaters CVA MPI ... operates by the supply (TJ-K10K) air temperature sensor. Setpoint temperature (0...30) °C.
There can be set the different desired (setpoint) air temperature by potentiometer on the top of the heater
casing.
IMPORTANT: If failure appears, power supply must be switched off and only then performed fault
elimination works.

DESCRIPTION OF OPERATING CVA MPE ...

Electrical duct heaters CVA MPE ... are designed with integrated temperature control, one temperature
sensor, wired remote control panel (TR5K) for temperature setpoint.
When the heater power supply is switched on, LED 6 on the controller (EKR-K...) PCB (see Fig. 1 on page 4)
flashes once every 8 seconds if setpoint is 0 °C and every second if setpoint is higher than 0 °C. If controller turns on
the heating depending on the demand, LED 5 lights (see Fig. 1 on page 4).
Heaters CVA MPE ... operates by the supply (TJ-K10K) air temperature sensor. Setpoint temperature (0...30) °C.
There can be set the different desired (setpoint) air temperature by wired remote control panel.
If LED 6 lights continuously it means that there is a failure of: supply (TJ-K10K) air temperature sensor or wired
remote control panel TR5K.
IMPORTANT: If failure appears, power supply must be switched off and only then performed fault
elimination works.
/ User Instruction
p. 11 15
single phase 230V / 2 - phase 400V / 3 - phase 400V
0,1VA
0...50 °C
Max. 90 % RH (non-condensing)
CAIROX rev1 – 28/01/2022