micronAir MICROMISER 12 Service manual

MICROMISER 12 & 16
ATOMISERS
AND
CONTROLLER
Operator's Handbook
and
Parts Catalogue
Micron Sprayers Limited
Bromyard Industrial Estate
Bromyard
Herefordshire HR7 4HS
United Kingdom
Telephone: [phone]
Fax: [phone]
E-mail: [email protected]
Web site: www.micron.co.uk
Iss 4W
11/2021

TABLE OF CONTENTS
1. INTRODUCTION...........................................................................................1
2. SPECIFICATION...........................................................................................2
2.1. Atomiser........................................................................................2
2.2. Segmental Attachment..................................................................2
2.3. Controller ......................................................................................3
3. INSTALLATION.............................................................................................5
3.1. Atomiser........................................................................................5
3.1.1. Mounting – Basic Atomiser ...................................................5
3.1.2. Mounting – with Segmental Attachment................................6
3.2. Liquid Feed ...................................................................................8
3.3. Liquid Drain...................................................................................9
3.4. Motor Venting................................................................................9
3.5. Electrical Connections.................................................................10
3.5.1. Use with Micronair Controller ..............................................10
3.5.2. Use with External Power Supply .........................................10
3.5.3. Atomiser Speed Control (Micromiser 12 Only)....................13
3.5.4. Atomiser Speed Output.......................................................14
3.6. Controller ....................................................................................15
3.6.1. Mounting .............................................................................15
3.6.2. Electrical Connections.........................................................16
3.6.2.1. Power Supply.................................................................16
3.6.2.2. Atomiser ........................................................................17
3.6.2.3. Atomiser Speed Control Input........................................17
3.6.2.4. Atomiser Enable Input ...................................................17
3.6.2.5. Atomiser Speed Control Output .....................................17
3.6.2.6. Atomiser Run Output .....................................................18
3.6.2.7. Atomiser RPM Output....................................................18
3.6.2.8. Control Ground ..............................................................18
4. OPERATION ...............................................................................................19
4.1. Atomiser......................................................................................19
4.2. Controller (Micromiser 12 Only) ..................................................19
5. CALIBRATION ............................................................................................20
5.1. Flow Rate....................................................................................20
5.2. Spray Droplet Size ......................................................................21
6. MAINTENANCE ..........................................................................................23
6.1. Routine maintenance – Atomiser ................................................23
6.2. Routine maintenance – Controller...............................................24
6.3. Fault Finding ...............................................................................25
7. PARTS LISTS .............................................................................................27
7.1. Micromiser Atomiser ...................................................................27
7.2. Controller ....................................................................................27
7.3. Cable Assembly ..........................................................................27
7.4. Segmental Attachment................................................................28

USE OF WARNING SYMBOLS
There are two safety warning symbols used throughout this handbook:
Danger related to electricity – warns of high voltage which can cause
physical injury or death and/or damage to the equipment.
General danger – warns about conditions, other than those related to
electricity, which can result in physical injury and/or damage to the equipment.

MICRONAIR MICROMISER ATOMISER & CONTROLLER
1. INTRODUCTION
Micronair Micromiser atomisers are designed specifically to spray a wide range of
liquids in droplets of precisely controlled size. Applications include treatment of
seeds and agricultural products, humidification, evaporative cooling, spraying of
odour control products and any industrial processes requiring precision spray
application.
Spray droplets are produced by a rotating toothed disc. Droplet size is determined
by the rotational speed of the disc, which is driven by a low voltage brushless motor
for maximum reliability.
Unlike hydraulic spray nozzles, the atomiser does not require a high liquid pressure
to operate and there are no small internal orifices to block. This allows the atomiser
to handle viscous materials and liquids with a high solids content.
The atomiser can operate at flow rates of up to 300 ml/min, with the minimum flow
rate determined only by the liquid delivery system used.
The brushless motor has integrated drive electronics and requires only a 24 V DC
supply to operate. A pulse output is provided for the measurement of disc speed or
monitoring of atomiser performance.
The atomiser is available in two versions:
Micromiser 12 with rotational speed variable over the range of 1,500 – 12,000 RPM
to produce spray droplets of 60 – 300 µm VMD. This atomiser can be used for spray
application on surfaces, in industrial processes etc. The atomiser motor incorporates
closed-loop speed control to ensure constant rotational speed regardless of liquid
flow rate.
The Micromiser 12 can be fitted with an optional segmental attachment that restricts
the spray droplets from the disc to a fan-shaped pattern for application across a
band for treatment of surfaces, conveyors etc. The remaining spray liquid is
collected and recycled to the supply.
Micromiser 16 with a fixed rotational speed of 15,000 – 16,000 RPM to produce
small spray droplets of 45 – 60 µm VMD for humidification, evaporative cooling,
application of odour control products etc.
An optional DIN rail mounted power supply and control module is available for use
with the Micromiser 12 atomiser. This has a 110/240 V AC/DC input and
incorporates a speed controller to enable the atomiser to be set to be set to operate
at the required speed regardless of liquid flow rate. The speed can be set either by a
control on the front panel or by an external potentiometer or control input. The
module has an input for an external run/stop command and provides outputs for
motor status and disc rotational speed.

2
MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER
2. SPECIFICATION
2.1. Atomiser
Dimensions: Length 105 mm (including atomiser disc but excluding
connector), diameter 58 mm (max), 32 mm (motor
housing)
Weight: 240 g
Mounting: By two M4 tapped holes
Liquid feed connection: Push-in fitting for 6 mm O/D rigid plastic tube
Vent connection: Push-in fitting for 3 mm O/D rigid plastic tube
Electrical connection: 4 pin M12 sealed connector (A-coding)
Environmental protection: IP65 (with motor vent tube connected)
Ambient temperature: -10 – +40 ºC nominal (minimum temperature must not
be below freezing point of liquid being sprayed)
Input voltage: 24 V DC
Power consumption: 1 – 10 W (dependant upon disc speed and liquid flow
rate)
Motor rating: Continuous
Disc speed: Micromiser 12: adjustable 1,500 – 12,000 RPM
Micromiser 16: fixed 15,000 – 16,000 RPM
Speed output: 5 V pulse output (one pulse/disc revolution)
Spray droplet size: Micromiser 12: 60 – 300 µm VMD
Micromiser 16: 45 – 60 μm VMD
(dependant upon disc speed & liquid properties)
Liquid flow rate: 0 – 300 ml/minute inlet flow
2.2. Segmental Attachment
Dimensions: Diameter 75 mm max, length 70 mm from flange of
atomiser body (excluding hose connector)
Weight: 30 g
Drain outlet connection: Hosetail for 6 mm I/D flexible tube
Spray segment: 60˚included angle
Liquid in spray segment: 25% (remainder drained from outlet)

3
MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER
2.3. Controller
Dimensions: Height 75 mm, width 55 mm, depth 110 mm (excluding
connector)
Weight: 300 g
Mounting: DIN 46 227 (DIN EN 50 022) rail or by two 4 mm
mounting holes in base
Environmental protection: IP20
Ambient temperature: -10 – +40º C (non condensing)
Input voltage: 85 – 260 V 50 – 60 Hz AC
120 – 370 V DC
Power consumption: 15 W max (dependant upon disc speed and liquid flow
rate)
Atomiser speed range: Micromiser 12 only: 1,500 – 12,000 RPM
Electrical connections: Atomiser – 4 pin M12 connector (A polarisation)
Power and control inputs/outputs – screw terminals
Control inputs: Remote motor speed (DC voltage)
Motor inhibit/enable (pull low to inhibit)
Outputs: Motor status (NPN transistor, pulled low when running)
Disc RPM (DC voltage)
Front panel: Speed control knob
LED indicators (green) for power, motor enabled and
motor running

4
MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER
Fig 1. – Micromiser Atomiser
Fig 2. – Micromiser 12 with Segmental Attachment

5
MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER
3. INSTALLATION
3.1. Atomiser
The Micronair Micromiser atomiser has a wide range of uses and the specific details
of the installation will depend upon the application and the operating environment.
The following sections are provided for general guidance only.
It is the responsibility of the installer and/or end user to ensure that the
installation of the atomiser and all associated wiring, pipework and equipment
complies with all applicable standards and statutory requirements.
It is the responsibility of the installer and/or end user to ensure that water or
other spray liquids are handled and/or treated so as to eliminate the possibility
of the distribution of bacterial or other infections in spray droplets.
The atomiser must NOT be installed in an explosive atmosphere. The
atomiser must NOT be used to spray liquids with a flash point of 40º C (104º
F) or below or in any situation where the spray liquid or spray droplets could
cause a fire, explosion or other hazard.
The atomiser must be fitted to a suitable mounting bracket supplied by the installer.
The design of the bracket will be determined by the adjacent structure, but the
following general points must be observed:
The atomiser should be attached to the mounting bracket with two M4 screws in
the tapped holes in the side of the atomiser housing (25 mm between hole
centres) as shown in Fig. 3. M4 x 12 mm stainless steel cap head screws are
supplied with the atomiser and these are suitable for a bracket with a thickness
of 2 – 6 mm. If alternative screws are used these should also be stainless
steel.
The bracket must be sufficiently rigid to avoid excessive vibration when the
atomiser or any nearby equipment is operating.
The design of the installation should allow the atomiser and its rotating disc to
be easily removed for cleaning and servicing.
3.1.1. Mounting – Basic Atomiser
When used without the segmental attachment the atomiser is designed to be
mounted with the disc downwards and with the axis of the disc within ±30º of the
vertical.
The toothed edge of the rotating disc of the atomiser is sharp and can cause
serious injury if touched whilst it is rotating. The atomiser must be installed in
a position where it cannot be touched or come into contact with clothing, hair
etc during operation (either by mounting at a height of 3 m or more above
floor level or in an enclosed space). If the atomiser is installed in an enclosed
space all access doors, panels etc must be fitted with electrical interlocks to
disconnect the power supply to the atomiser when opened.

6
MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER
The bracket and any adjoining structure should not protrude below the area shown in
Fig. 3. This is to minimise contamination by spray droplets from the rotating disc.
Fig. 3 – Mounting of Atomiser
3.1.2. Mounting – With Segmental Attachment
If not already fitted, the segmental attachment must be mounted on the atomiser by
means of its securing ring and the three self-tapping screws supplied. The 6 mm
inlet fitting and M4 securing screws must be removed from the atomiser body before
fitting the securing ring and be replaced afterwards.
When used with the segmental attachment the atomiser must be mounted above the
surface to be sprayed with the axis of the disc inclined at an angle of at least 45º
below the horizontal as shown in Fig. 4. This is to allow spray liquid collected within
the conical body to flow into the drain tube.
The segmental attachment is mounted on the body of the atomiser by means of a
securing ring and three self-tapping screws. The attachment can be rotated on the
atomiser after slackening the screws to adjust the trajectory of the segmental spray
pattern. The screws must be re-tightened after adjustment.
The width of the band sprayed will depend upon the distance of the atomiser from
the surface as measured along the trajectory of the spray droplets.
In order to ensure even spray coverage across a surface the atomiser should be
mounted above a point corresponding to about 66% of the width of the spray band
as viewed on the motor end of the atomiser – see Fig. 4. The segmental attachment
should be rotated to achieve the correct lateral position of the spray band.

7
MICRONAIR MICROMISER 12 & 16 ATOMISERS & CONTROLLER
Fig. 4 – Mounting of Atomiser with Segmental Attachment
Fig. 5 – Connections to Atomiser