1. Economiser Kit Selection

The following optional kit references are taken from the supplied PREMIUM quick reference workbook.

The workbook lists the same kit families for the corresponding R454B commercial models. Confirm the full model, installation configuration and current kit compatibility before ordering.

2. Mechanical Installation

The supplied RAQ-118 ECO installation document illustrates the following procedure. The general method may assist with other sizes, but the actual mechanical arrangement and dimensions must be confirmed against the relevant kit instructions.

Step 1 – Prepare Fresh Air Opening

1. Isolate the unit and ensure it is safe to work on.
2. Remove the fresh-air infill panel.
3. The RAQ-118 installation example identifies 10 panel bolts.
4. Expose and inspect the louvre-box mounting opening.

Step 2 – Install Fresh Air Louvre Box

1. Apply the specified adhesive insulation tape to the louvre box.
2. Align the box with the fresh-air opening.
3. Mark and trim interfering insulation so the box mounts flush.
4. Secure using the supplied fixing arrangement.
5. The RAQ-118 example specifies six external hex-head self-tapping screws.

Step 3 – Install Outside-Air Thermistor

1. Identify a suitable sensor position in the fresh-air louvre box.
2. The RAQ-118 example uses an 8 mm mounting hole approximately 300 mm from the top on the left side.
3. Fit and secure the NTC10k thermistor.
4. Route the sensor lead away from moving damper parts and possible cable damage.

Step 4 – Install Return Air Louvre Box

1. Prepare the return-air opening.
2. The RAQ-118 procedure describes removing 10 existing flange rivets.
3. Position and secure the return-air louvre assembly.
4. Fit and tighten the required fixing screws.
5. Check that both dampers operate freely.

3. Damper Motor Direction

These positions are documented in the supplied economiser installation example. Verify that the installed dampers travel in the correct direction and are not obstructed.

4. Economiser Wiring

Outside-Air Temperature Sensor

The supplied wiring procedure identifies the following terminals:

Procedure: Remove the existing 10 kOhm resistor from X1-189 and X1-190 and terminate the economiser NTC10k outside-air sensor to those terminals.

Damper Motor Wiring

The RAQ-118 installation document identifies three damper motor extension connections:

The installation example joins three conductors at each corresponding connection through the supplied junction-box arrangement.

Route and secure all cables using suitable cable glands and protection. Prevent contact with moving components, sharp cabinet edges and unsuitable heat sources.

5. Enabling Economiser Mode

The Danfoss controller must be programmed to recognise the outside-air sensor and enable economiser control.

1. Confirm the outside-air sensor has been correctly installed and wired.
2. Enter the controller's authorised service login.
3. Navigate to Parameters, Rooftop, External Damper.
4. Open Configuration.
5. Select the free cooling/heating enable parameter.
6. Change NO to TEMP.
7. Save the parameter as required by the controller.
8. Verify outside-air temperature and damper response.

Access note: The supplied ECO addendum uses Level 2 access (3000), while Commissioning Guide V1.4 describes a Level 3 login for economiser programming. Required access may depend on the controller/software configuration. Use the access level authorised for the installed controller.

6. Minimum Fresh-Air Opening

The commissioning guide identifies the following menu path:

MENU → LOGIN → PARAMETERS → ROOFTOP → EXTERNAL DAMPER → CONFIGURATION → MINIMUM OPENING

The guide states that the fresh-air and return-air dampers operate together. Its example is:

This illustrates the complementary damper operation described in the commissioning guide. The actual minimum fresh-air requirement must be determined for the building design and applicable ventilation requirements.

7. Economiser Troubleshooting

GENERAL AIRSTAGE | Economiser service reference for qualified technicians.