Section 4 – Installation
The smoke detector is installed inside the Extract-air duct at the ventilation unit. Alternatively, an external fire
alarm system can be connected.
NOTE!
If an external smoke detector is not used then a link wire must be fitted across the “Smoke
Detector” terminals on the External Sensors PCB. (See section 4.5.1 Installation of the smoke
detector bypass Link Wire).
4.5.9 Installation of the External duct heaters. (Only applicable to Natural Air 180 PH model)
The preheater is for frost control, and the external post heater can be connected to the unit to ensure the
supply air temperature is acceptable.
•
The preheater is fitted into the Fresh air duct and must be adequately thermally insulated.
•
The post heat (Boost) is fitted into the Supply air duct and includes its own temperature sensor.
•
The airflow direction is indicated by arrows on the duct heater unit.
•
Both units are powered directly from the ventilation unit.
•
Connect the 230V 50hz supply (from the ventilation unit) to the terminal block inside the heater
enclosure.
•
A post heat (boost) duct heater also requires a wired connection for the internal thermistor.
Fig. 4.13 Connecting the duct heaters to the ventilation unit
1 Power supply to External Pre-heater unit.
2 Power supply to External Boost heater unit.
3 Inlet glands for external sensors (NTC thermistor for Boost heater unit).
(Remove a grommet and make a suitable hole through the exposed EPP insulation to the wiring chamber)
Fig. 4.14 Connection for Boost heater NTC thermistor
to TB1 (Terminals 1 and 2).
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Section 5 – Set up
5 Set up
After completing the installation, system setup must be carried out by a qualified technician in order to check
the correct functionality.
5.1 Requirements for the building
Set up must only be carried out when the building and rooms are ready for occupation.
Ensure that the rooms are free of dust, eg. construction material.
NOTE!
For setting up, the unit and all air inlets and outlets must be freely accessible.
5.2 Requirements for the ventilation system
For set up, the installation of all components of the ventilation system must be completed:
5.3 Requirements for the technician
For setup of the ventilation system, the qualified and trained technician will need the following measuring
equipment:
•
Multimeter
•
Temperature measuring instrument
•
Vane anemometer with measuring funnel
•
Differential pressure gauge
NOTE!
Setup should be carried out by a qualified technician. Improper setting up of the ventilation system
can lead to poor and inefficient ventilation and can cause high noise levels and draughty air
conditions!
5.4 Set up procedure
The set up of the ventilation system is carried out on the basis of the following general procedure:
1. Visual inspection of the installed system
•
Ventilation unit, condensate discharge line, filter
•
Controllers, sensors, accessories
•
Air-duct system, thermal insulation
•
Special features (e.g. with open flue fire installation)
2. Start-up
•
Switch on the power supply
•
Functional check of unit and accessories
3. Adjustments
•
Volume flow rates, adjusting unit and valves
•
Programming the control
4. Instructions
•
Instructing the user / operator on control and maintenance procedures
During initial measuring of the ventilation system, all interior doors and all windows must be kept shut.
All settings required for start-up are made in the Installer menu (see “Control”).
NOTE!
Changes made using the Installer menu can have a significant effect on the operation of the
ventilation system.
• The setting up procedure should only be made by a qualified technician.
Incorrect settings can affect the efficiency and noise of the system and can cause system failures.
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