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User Instruction
CAIROX
rev1
–
28/01/2022
DESCRIPTION
Electrical duct heaters CVA are designed to heat fresh air in ventilation systems. Casing (CVA protection class IP
44, except CVA Type NV which protection class IP 30) is made from Aluzinc coated steel which is high temperature
proof and with rubber seals for duct connection. Tube of heating element is made from stainless steel AISI 304.
There are 2 protection thermostats and screw terminals for easy connection installed in the heaters.
Heaters can be installed horizontally with the electrical connection box facing upwards or sideways and
vertically (only if the air
fl
ow direction upwards). Heaters can't be installed in explosive and aggressive substances
environment. Heaters can be used only for the clean air heating or preheating. Heaters intended only for inside
installation. If heater is installed in such way that can be accidental contact with heating elements, protective grill
must be installed. The air velocity in the duct of the heater must be 1,5 m/s minimum. The maximum temperature
of the output is 50 °C.
Heaters CVA with integrated temperature controller EKR-
K…
(See Fig. 1)
can be controlled in five
different
ways
depending on control type:
Type CVA MPI
–
potentiometer on the lid of the heater
(See page 11)
.
Type CVA MPE
–
external wired remote setpoint knob (TR5K) for temperature control
(See page 11)
.
Type CVA MPX
–
external wired remote
0…10V
signal for temperature control
(See page 12)
.
Type CVA ESKM
–
external wired remote PWM (ON/OFF:
ON(6…24)VDC)
signal for temp. control
Electrical duct heaters CVA with integrated temperature controller EKR-
K…
works by PID regulator. That enable
fine temperature control. Controller EKR-
K…
controls load by Triacs without moving parts, which causes no-noise
commutation.
Fig. 1
View may vary depending on type EKR-K.
