Automist Smartscan Hydra
®
DIOM Manual - version 3.01.0
Plumis Ltd Copyright © 2020. All Rights Reserved.
Page 44 of 116
S MA RT SC AN
®
Figure 45: Crimping Tool
Watermist nozzle (Automist sprayhead)
Automist’s watermist nozzles are provided assembled with the sprayhead and fitted with an inlet filter
during installation to prevent blockage during service. The water filter is qualified to maximum 6 bar.
Therefore, the PRV (pre-set to 3 bar, maximum 16 bar input) must be installed upstream of water filter as
shown in Figure 2). Filters selected are made of corrosion-resistant materials and designed such that
spheres with a diameter of more than 0.8 times the minimum nozzle waterway dimension cannot pass
through.
Any sprayhead removed from the system should be discarded or returned to the manufacturer for factory
refurbishment. Replacement nozzles and/or filters, should be fitted and only new or refurbished equipment
should be used.
Sprayhead Specification:
Weight
1.3 kg
Size
133mm (height) x 50mm (depth) x 128mm (width)
IP Rating
IP24D
Nozzle
Operating Pressure
80 – 100 bar
Flow Rate
6 litres per minute
Spray Pattern
65-degree vertical blade
K Factor
0.62
Input voltage
24VDC ±10% (reversed voltage protected)
Maximum permissible input
voltage
28VDC (transient protected)
Minimum permissible input
voltage
22VDC
Input current
0.03A Idle Mode
<0.5A Scanning Mode
~0.5A Servo Stalled
Operating temperature
4 - 50 °C
Operating humidity
20 - 90% (non-condensing)
We continually monitor that the thermopile sensors are reading temperatures and all heads are ready to
operate. When triggered by a ceiling-mounted multi-sensor detector, all the linked sprayheads begin
scanning. They start measuring the temperatures within the room using an infrared sensor. The scan is
looking for an exceptionally high temperature reading, or a differential increase between scans. Once the
temperature exceeds a threshold that head is deemed to have successfully located a fire and the pump
turns. It then delivers watermist to the location of the fire.
