Setting Up The Brine Low Pressure Switch - Daikin EWSAH06D 9W Series Installer's Reference Manual

6.9 Setting up the brine low pressure switch

EWSAH/X06D
Daikin Altherma 3 WS
4P675764-1 – 2022.04
Setup
a
c
a Thermostat
b Remote outdoor sensor
c Fan coil units
d Non-return valve (field supply)
e Pump
f Plate heat exchanger for passive cooling (field supply)
g Temperature controlled mixing valve (field supply)
h Plate heat exchanger (space heating/cooling circuit)
i Plate heat exchanger (central water loop)
j Hydro module
▪ A thermostat input contact creates a demand for the central water loop valve to
open and to allow flow in the circuit. For more information, see
connect the thermostat for passive
▪ An external circulation pump is required and needs to be controlled by the
external thermostat.
▪ The setup shown is only indicative. The precise configuration must be
determined on a case-by-case basis.
Configuration
None.
Depending on the applicable legislation, you might have to install a brine low
pressure switch (field supply) if glycol or brine is used in the central water loop
circuit.
The brine low pressure switch can be used to notify the user when there is a leak in
the circuit. The switch (normally closed) is triggered when the pressure in the
circuit is lower than the threshold value of the switch.
NOTICE
Mechanical. We recommend to use a mechanical brine low pressure switch. If an
electrical brine low pressure switch is used, capacitive currents might disturb the
flow switch operation causing an error on the unit.
d
g
e
f
d
i
h
j
4
cooling" [ 104].
6 Application guidelines
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b
"9.2.12 To
Installer reference guide
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