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4.5. Data for Hydraulic Interconnection and System Water Sensors
The Aquasmart system always relies on the modulation between its units in order to ensure that the system’s outlet water
(mixing water) is meeting the temperature set point set on the master machine.
Simple and safe operation is achieved by adopting a set of sensors that allows the reading of control temperatures and keeps
both the system and each module operating safely. The main safety elements are:
Table 5
Equipment
Key
Function
Supply
System Inlet water
sensor
REWT
Evaluate whether the inlet temperature is within the
operating values for the system.
Factory default (fi eld
installation)
System Outlet water
sensor
RLWT
Main system control sensor, where it allows the system
to perform the modulation to guarantee the delivery
of water at the desired temperature.
Factory default (fi eld
installation)
Unit Outlet water
sensor
ULWT
Evaluate the outlet temperature of each unit for freeze
protection.
Factory default (fi eld
installation)
Unit fl ow sensor
WFC
Freeze protection due to lack or low water fl ow per
unit
Factory default (fi eld
installation)
Diff erential pressure
switch
DPS
Switch that switches to identify pressure diff erence
between water inlet and outlet.
Field installation.
Mandatory for ODU>=4.
Pump drive
13 and 14 of
terminal BC2
(K4)
Pump drive control (WP), to ensure the correct and
safe operation of the units.
The pump is not shipped
from the factory, only the
24VAC command.
Valve actuation
10 to 12 of
terminal BC2
(K2)
Valve drive control (WV), to ensure the correct and
safe operation of the units.
The valve is not shipped
from the factory, only the
24VAC command.
Y Filter
-
Filter for heat exchanger protection
Factory optional item
It is mandatory to install the DPS (diff erential pressure switch for water) when more than 3 chillers are installed (above 45TR).
IMPORTANT
It is mandatory to install the Y fi lter (Mesh 40) on the water inlet of all modules even when not supplied as standard by the factory.
IMPORTANT
4. Instalation (cont.)