23
ENG
“optiMist” +0300065EN- rel. 1.1 - 29/01/2013
with a diameter of 35mm.
3.
The discharge solenoid valves must be connected to the lower horizontal
collection with a diameter of 35mm.
4.
The rack must be tilted at least 1° towards the discharge valves.
5.
The connection pipes between the rack and pumping station must be
without pockets that could cause water stagnation.
When the rack has a fl ow-rate of about 75% less than the maximum
fl ow-rate of the pump, instead of discharge solenoid valves, mechanical
discharge valves may be used, which do not require wiring; in this
case water consumption and discharge and refi lling times are slightly
increased. The discharge solenoid valves and mechanical valves can be
connected directly to the rack and to discharge inside the pipe or they
can be moved outside the pipe using the appropriate extension kit (see
example kit ACKT1F0500).
In the event of solenoid valve installation directly on the rack, inside
the pipe, the width of the rack increases by 10cm. The collectors are
populated with atomising nozzles in brass in the appropriate number to
achieve the fl ow-rate reported in the related code digit.
The corner brackets are equipped with holes for mounting in the pipe.
Please Note: IF THE optiMist IS USED AS A CHILLBOOSTER AND WITH
THE SAME DISTRIBUTION SYSTEM, SET THE MAXIMUM PRESSURE
CONTROL AT 10 BARS.
5.2 Droplet
separator
The droplet separator catches the droplets of water that aren’t completely
evaporated in the air, to prevent them from getting downstream objects
wet. They are made up of standard size modules that are assembled
on a support structure to cover the section of the AHU. The structure,
which is entirely made from stainless steel, facilitates drainage of the
water captured by the droplet separator. To facilitate maintenance of the
individual modules, removal and replacement is done from the front, by
removing the appropriate front frame. The modules are available with
glass fi bre or stainless steel fi ltering material. They are available in 3 sizes
in height and width of the modules, the combination of which leads to
9 standard modules.
5. DISTRIBUTION
SYSTEM
This paragraph briefl y describes the distribution and atomisation systems
for AHUs (rack and droplet separator) and for rooms. These are described
in detail in the “optiMist – distribution systems” manual.
Fig. 5.a
Fig. 5.b
5.1 Distribution and atomisation rack
“n” racks are available which are diff erentiated by:
•
Width (in modules, each module is 152mm: the total value is obtained
by adding 94 to the product of 152 and the number of modules).
•
Height (in modules, each module is 152mm: the total value is obtained
by adding 68 to the product of 152 and the number of modules).
•
water fl ow-rate in l/h (multiply value *10).
•
number of circuits
example: ER0_11_07_22_1
•
width: 94+(“11”*152).
•
Height
68 +(“7”*152).
•
Number of nozzles:
22
•
Number of circuits “1”
The racks are supplied in unassembled kits; customers are responsible
for assembly.
Rack components:
1.
AISI 316 stainless steel nozzles with brass adapters from NPT1/8m
2.
AISI 304 collectors for nozzles, diameter 20mm with orifi ces from NPT1/8f.
3.
AISI 304 distributor collectors, diameter 35mm with orifi ces from G1/2m
for compression fi ttings.
4.
Compression fi ttings for pipes from 20mm and fi tting from G1/2f.
5.
Corner brackets in AISI304 plate.
6.
Vertical profi les in AISI304.
7.
Pipe gripping clamps for pipes from 35mm (single or double according to
the number of circuits on the rack).
8.
Screws for pipe gripping clamps: M8 for double clamp and M6 for single
clamp.
9.
G1/2m caps in brass to close the orifi ces not used by the collectors, d.35.
10.
M6 screws in AISI304 to assemble the corner brackets and vertical profi les
(insert fi gure)
To connect the nozzles and compression fi ttings to the discharge valves,
use sealants suitable for:
•
Thread size.
•
Maximum operating temperature.
•
Maximum operating pressure.
To correctly discharge the system, each rack is confi gured for the
installation of a discharge solenoid valve.
To ensure the discharge of the rack, they must satisfy the following
conditions:
1.
The collectors with atomising nozzles must be in the vertical position.
2.
The water supply must be connected to the upper horizontal collector
