CIAT V30 Installation Operation & Maintenance

Installation

Operation

Commissioning

Maintenance

10 - 2011

NA 07.108 D

V30

EN - 1

EN

CONTENTS Page

General information 1

Operation 2

Operating instructions 2

ECO external switch/Frost protection 3

Air temperature measurement 4

Water temperature measurement 4

Switch parameter settings 5

Application details 7

Electric heater management 9

Unit installation 11

Technical specifications 11

LED operation 11

Flush-mounted unit 12

Wall-mounted unit 12

General information

CIAT’s V30 control is designed for use with system-powered air conditioning terminal units (fan-coil units, UTA, cassettes etc.) in 2 pipe, 2
pipe/2 wire or 4 pipe applications using recirculated air.

There are two types of V30 controls:

- those controlled by air acting on the ventilation

- those controlled by water acting on 230V thermo motor valves and on the ventilation.

V30 is available in a wall-mounted version (to be connected by the installer) or built-in version (fitted and connected in the factory)

Main functions:

- Controls a manual 3-speed fan.

- Automatic heating/cooling switching with changeover sensor.

- Potential-free input for a window contact, timer or presence sensor.

- Three speeds: Comfort/Economy/Frost protection.

N.B.: built-in version on Major Line CV, vertical casing

For a 2 way or 4 way valve kit, the switches located at the

rear of the V30 thermostat must be reset (see section entitled “Switch settings”).

EN - 2

Operation

On/off control.

* See possible applications for electric heater management (Section entitled: Electric heater management)

-3°K

Electric heater*

Valve

Valve

Neutral zone 4/6°K

Room or return air
temperature

Hot setpoint

19°C

Cold setpoint

23 or 25°C

Operating instructions

Setting the setpoint temperature:

The setpoint temperature can be set by adjusting the ± on the dial

1

- On the comfort setting, at the centre point, the hot setpoint is 19°C and the cold setpoint is 23°C or 25°C.
The setpoint values can be set within a range of ± 6°C.

- The neutral zone is 4 or 6K depending on the setting selected.

- On the economy setting, both the hot and cold setpoints are automatically offset by 5°C in relation
to the comfort setpoint indicated by the position on the dial

- The frost protection setpoint is set to 8°C

Setting the fan:

- The user may choose between 3 manual fan speeds by using the button

Special information for controlling an electric

heater button:

- If the user selects the low fan speed, the electric heating cycle rate is limited to 50%.

- If the user selects the medium speed, the cycle rate is limited to 80%.

Limiting the cycle rate prevents the appliance from overheating.

Wall-mounted unit

with

dial

1

2

Built-in unit (connected to
the fan coil unit)
with dial

1

2

EN - 3

EN

Note on Neutral zone fan in Comfort mode only:

Setting: S.6=OFF: stop fan in neutral zone: with a built-in unit and S.6=OFF, periodic ventilation is carried out every 60 minutes
and engages the fan for 1 minute on low speed.

This periodic ventilation prevents stratification and enables better irrigation of the return sensor.

This sequence is also carried out on the wall-mounted thermostat, if a return air temperature sensor is connected to terminals 8-9.

Setting S.6 = ON: Permanent ventilation in deadband:
The fan continues to operate at the speed set using the selector

Post ventilation safety period:

This is activated automatically in the following phases:

- When exiting heating or cooling mode, the fan continues to operate at low speed for approximately 2 minutes, thereby ensuring
post ventilation safety.

- When the thermostat is stopped (position

) there is also a 2-minute post ventilation safety period at low speed.

Setting the operating speed:

Position automatically changes the thermostat to frost protection mode (+8°C) (with fan on low speed only).

Because post ventilation is a safety measure, once started it will override all of the controller’s other actions. If the On/Off selector
and/or dial are moved while the post ventilation safety process is active on the controller, the V30 will remain inoperative until the
2-minute period has elapsed. Once the safety period is complete, the V30 starts operating again normally in heating or cooling
mode, or at the selected speed.

N.B.: These values, which aim to help understand how the dial works, simply give an indication of the selected

temperature. There will be a slight difference between the value at which the dial is set and the actual

temperature in the room, depending on the chosen settings (possible setting of the neutral zone of 4/6°K, with the thermostat

set to hot or cold).

Eco external switch/frost protection

An On/Off input enables the thermostat to be switched remotely to economy or frost protection mode

(configurable). The direction of operation for this input can be adjusted (normally open or normally closed).

This is a potential-free input which should have no voltage. It is not possible to connect several controls in parallel

on the same switch. Also, if there is a timer present, the installer should allow for a relay board to be fitted.

Setting the Summer/Winter changeover:

The summer/winter changeover can be set in two different ways:

- Automatically, using the changeover sensor which measures water temperature

- Remotely using a control line (On/Off switch).

n Switch open: COOLING mode

n Switch closed: HEATING mode

n Wall thermostat, hotel version

A version is available with graduation in degrees on the dial.

The maximum length of the line is 10 meters. The connection should be made so as to ensure there is an extra-

low voltage for safety (TBTS according to standard C15-100) and to limit the length of the wires.

EN - 4

N.B.: This schematic diagram is needed for changing from comfort mode to “Eco” mode as standard (to “frost
protection” mode by on-site adjustment). It is strictly forbidden to carry out timed programming by switching off the

thermostat power supply.

N

P

K1 K2 K3 K4

CF CF CF CF

Air temperature measurement:

- A built-in thermostat regulates air temperature using a return sensor.

- A wall thermostat regulates air temperature:

n By either using an indoor environment sensor (built into the unit)

n Or by using a return sensor.

For a wall thermostat, particular attention must be paid to the position of the thermostat in the room (do not expose

it to the sun, or place it above an appliance which releases heat, place it on an inside wall). The end of the wiring conduit must be

heat insulated.

Some Values:

The return and changeover sensors have the same specifications.

Temperature

°C

5 10 15 20 25 30 35

Resistance

ohm 22,050 17,960 14,690 12,090 10,000 8,313 6,940

150 cm

150 cm

20 cm

min.

150 cm

20 cm

min.

Water temperature measurement

The 2 pipe or 2 pipe + 2 wire fan coil units may have a water temperature measurement sensor (or changeover
sensor). It should be placed upline of the 4-way valve (water network side) by the installer. It is fitted to the pipe using

electrician’s clips and must be insulated

Clamping collars Sensor adapter

Sensor

Water inlet pipe

Insulation

Sensor

Valve motor

3-way valve

with built-in

bypass

(often called a

4-way valve)

Schematic diagram of connection with timer