Systemair NOTUS-S CAV Controller

User Manual

Installation and Mounting

Duct Installation Requirements:

Diagram illustrating duct installation requirements. A horizontal duct section is shown with the controller installed. It indicates a minimum clearance of 200 mm upstream and downstream of the controller. A formula for calculating the effective diameter (Deff) is provided: Deff = (2 * W * H) / (W + H), where W is the duct width and H is the duct height.

Mounting Orientations:

Diagrams showing various mounting orientations for the controller in a duct. Correct installations are marked with green checkmarks (✔️), while incorrect installations are marked with red crosses (❌). The correct orientations show the controller mounted horizontally or vertically with airflow in either direction, provided there is adequate clearance.

Operation and Settings

Air Flow Adjustment:

Illustration of adjusting air flow settings, represented by a dial with positions P1 to P10.

Setting Control Voltage (Example 1):

A user is depicted thinking about a target air flow rate (qv = 320 m³/h). The process involves selecting settings (1a, 1b) which lead to a calculation.

Air Flow Settings Table:

Pos. No.qv (m³/h)qv (l/s)Uc (V)
120055.50
224467.91.2
328980.22.3
433392.63.5
5378104.95
6422117.35

Control Voltage Calculation Example:

A calculation example is shown to determine the control voltage (Uc). Using linear interpolation with values from the table (e.g., qv=320 m³/h, with reference points (289 m³/h, 2.3 V) and (333 m³/h, 3.5 V)), the calculation is: Uc = ((320 - 289) * (3.5 - 2.3)) / (333 - 289) + 2.3, which results in Uc ≈ 3.15 V.

Target Air Flow Confirmation:

Confirmation of achieving the target air flow: qv = 320 m³/h.

Actuator Compatibility and Wiring

Compatible Actuators:

Images of compatible actuators: LM24-SRV and CM24-SRV, with their respective model numbers and basic specifications.

Air Flow vs. Control Voltage Graph:

A graph plotting air flow rate (q, m³/h) on the y-axis against control voltage (Uc, V) on the x-axis, showing a linear relationship between minimum and maximum values.

Wiring Diagrams:

Wiring diagrams for the NOTUS-S controller. It shows connections for AC 24 V and DC 24 V power supply, and control signals using DC 0-10 V or DC 2-10 V. Wire colors are indicated: BK (Black), RD (Red), WH (White), OG (Orange).

Actuator Adjustment (LM24-SRV, CM24-SRV)

Voltage Limits Graph:

A graph plotting air flow rate (q, m³/h) against control voltage (Uc, V), illustrating the relationship between minimum (Vmin), low limit (VL), high limit (VH), and maximum (Vmax) voltage settings. Conditions for these limits are shown: VH ≤ Vmax, VL ≥ Vmin, VH > VL.

LM24-SRV Adjustment:

Step-by-step instructions for adjusting the LM24-SRV actuator. It involves using a screwdriver to rotate a setting wheel to set the high limit (VH) and low limit (VL) positions, indicated by angular movements.

CM24-SRV Adjustment:

Step-by-step instructions for adjusting the CM24-SRV actuator. It involves using a screwdriver to turn a setting screw to set the high limit (VH) and low limit (VL) positions, with an audible 'CLICK!' confirming the setting.

Alternative Actuators and Operation

Alternative Actuators:

Images of alternative actuators: LM230 and CM230, with their respective model numbers.

Air Flow vs. Control Voltage Graph:

A graph plotting air flow rate (q, m³/h) against control voltage (Uc, V), illustrating the relationship between minimum (Vmin), low limit (VL), high limit (VH), and maximum (Vmax) voltage settings. Conditions for these limits are shown: VH ≤ Vmax, VL ≥ Vmin, VH > VL.

Wiring Diagram (AC 230V):

Wiring diagram for AC L AC 230 V power supply and control signals, showing wire connections.

Alternative Actuator Adjustment (LM230, CM230)

LM230 Adjustment:

Step-by-step instructions for adjusting the LM230 actuator. It involves using a screwdriver to rotate a setting wheel to set the high limit (VH) and low limit (VL) positions, indicated by angular movements.

CM230 Adjustment:

Step-by-step instructions for adjusting the CM230 actuator. It involves using a screwdriver to turn a setting screw to set the high limit (VH) and low limit (VL) positions, with an audible 'CLICK!' confirming the setting.

Get In Touch

Call: 0845 6880112

Email: info@adremit.co.uk

Our Address

Puravent, Adremit Limited, Unit 5a, Commercial Yard, Settle, North Yorkshire, BD24 9RH

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