p. 13
/
15
User Instruction
CAIROX
rev1
–
28/01/2022
DESCRIPTION OF OPERATING CVA MPX … (PTC…PS) *
Electrical duct heaters CVA MPX
…
(PTC…PS)
are designed for the heaters power
(0…100)
% control by
analog signal input
(0…10)
VDC, with integrated PTC (air velocity) and PS (air pressure) sensors.
When the heater power supply is switched on, controller (EKR-
K…)
is in preparation mode for 30 seconds, LED
1
fl
ashes once every 5 seconds. If air velocity is detected by PTC sensor (rapid LED 1
fl
ashes when Min. 1,5 m/s is
detected) and air pressure is greater than min 20kPA after preparation mode ends, LED 1 will start to flash once
every second and controller will initiate the heating based on demand, LED 2 is indicating when heating is initiated.
If there is no air velocity detected and or there is not enough pressure in the duct, controller will not initiate the
heating until air velocity and or pressure is detected.
Pre-heater casing and air duct before pre-heater should be insulated with rock wool 10cm (R~2,4m²K/W).
Depending on the mounting position of the heater in the duct relative to the motor (pre- or post-motor), the
pressure hose must be placed on the "-" or "+" pipe, respectively.
*
- non standard option. For more information please contact us : www.cairox.com
DESCRIPTION OF OPERATING CVA MPI … 2NTC*
Electrical duct heaters CVA MPI
…
2NTC are designed with integrated temperature control, two
temperature sensors, potentiometer on the top of the heater casing 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)
fl
ashes depending on the operating mode. If controller turns on the heating depending on the demand, LED 5 lights
(see Fig. 1 on page 4)
.
Heaters CVA MPE
…
2NTC can operate in two modes:
1.
Control by the supply air temperature sensor (TJ-K10K), when the first (1) switch of JP1 -(R37)
(see Fig. 1 on
page 4)
is in position ON. LED 6
fl
ashes twice per second. Set point temperature
(0…30)
°C.
2.
Control by the supply (TJ-K10K) and by the room (NTC10) air temperature sensor, when the first (1) switch of
JP1 - (R37)
(see Fig. 1 on page 4)
is in position OFF. LED 6
fl
ashes once per second. Setpoint temperature
(15…30)
°C.
In this mode is preprogrammed the minimum (15°C) and the maximum (45°C) temperatures of supply air. The room
air temperature sensor is mounted in the wired remote control panel TR5K NTC10.
Depending on the operating mode there can be set the
different
desired (setpoint) air temperature by wired
remote control panel TR5K NTC10.
*
- non standart option. Fore more information please contact us : www.cairox.com
DESCRIPTION OF OPERATING CVA MPE … 2NTC*
Electrical duct heaters CVA MPE
… 2NTC are designed with integrated temperature control, two temperature
sensors, wired remote control panel (TR5K NTC10) 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)
fl
ashes depending on the operating mode. If controller turns on the heating depending on the demand, LED 5 lights
(see Fig. 1 on page 4).
Heaters CVA MPE
…
2NTC can operate in two modes:
1.
Control by the supply air temperature sensor (TJ-K10K), when the first (1) switch of JP1 -(R37)
(see Fig. 1 on
page 4)
is in position ON. LED 6
fl
ashes twice per second. Set point temperature
(0…30)
°C.
IMPORTANT:
If failure appears, power supply must be switched
off
and only then performed fault
elimination works.
IMPORTANT:
If failure appears, power supply must be switched
off
and only then performed fault
elimination works.
