Installation And Electrical Connection - Cairox CVA M Series User Instruction

INSTALLATION AND ELECTRICAL CONNECTION

Electrical duct heaters CVA can be installed horizontally in any position except electrical connection box
downward and vertically (only if the air flow direction upwards) (see Fig. 2).
We recommend install supply air temperature sensor in distance multiplied by the heater's diameter (3xD).
For example: heater CVA diameter 200 mm, sensor's installation distance will be: 3x200=600 mm.
IMPORTANT:
The installation to the mains power supply may only be wired by a competent electrician. The power
supply cable must be selected in the ratio with power of the heater. When installing these heaters, the
standards and regulations in force in your country must be followed strictly adhered to. Within the installation
an electrical isolation automatic circuit breaker (not included) must be present, to enable the installer to cut all
power supply lines. Automatic circuit breaker must be selected regarding power and nominal current (see the
electrical rating plate on the lid of heater) of the heater and should have characteristic B. Connect the heater to
the mains power supply, check that the voltage, frequency, power and current are the same as those indicated
on the electrical rating plate. The heater must be earthed.
Fig. 3. Mounting example CVA MPI/NI...
*- TR5K is used in CVA MPE heater version.
**- Temperature set point knob is used in CVA MPI heater version.
/ User Instruction
p. 5 15
Fig. 2
Fig. 3
CAIROX rev1 – 28/01/2022