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What is the actual difference between C35-FC and C35-VAV?

When we tested them we saw no actual difference on the regulation?

There are both 3 analog outputs and 1 0-10V input.

Also on the modifications, I saw no difference.

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1 Answer

The main difference is in the configuration and control possibilities.

We designed C35-FC for fan coil applications and with the purpose to control the room temperature with a fan and a valve actuator(s). On Home screen, you have a room temperature set point and fan speed set point:

Home Screen: Setpoints

The Analog output 1 (AO1) will control fan speed (0-10V) and the Analog output 2 and 3 will control cooling or/and heating valve actuator depending on the room temperature measurment and the set point.

The C35-VAV is designed for ventilation applications and with the purpos to control room temperature and/or air quality with variable air volum box and heating or/and cooling valve actuator(s).

The Analog output 1 (AO1) will control VAV box and air flow depending on measured CO2 level and/or room temperature. This can be set in Advanced menu:

VAV Parameters

The Analog output 2 and 3 will control heat exchanger valve actuator(s) if it is instaled.

If you test the C35-FC and C35-VAV side by side and if they both have been configured to contorl the temperature you will have same levels of voltage on analog output 1 on both devices. But if you change configuration of C35-VAV to ventilation, then the temperature will not affect the analog output 1 value.

There is no hardware difference between C35-FC and C35-VAV except in the case when you order C35-VAV with a built-in CO2 sensor which is not possible with C35-FC.

C35VAV VAV applications Image

Guide

VAV Parameters

Difficulty:

Moderate

C35FC Fan coil Image

Guide

Home Screen: Setpoints

Difficulty:

Moderate

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