Combination of options for the periods when the unit is in
standby mode.
Ambient unit
temperature range
Product
without pump option
with pump option
> 0°C to 51°C
-
-
-20°C to 0°C
Frost protection option
or
Suitable antifreeze
solution (such as
glycol)
Antifreeze protection,
hydraulic module
option
(1)
or
Suitable antifreeze
solution (such as
glycol)
(1)
(1) Allow the pumps to circulate. If there is a valve, install a bypass (see diagram
for winter position).
If the system is isolated by a valve, it is imperative to install a
bypass as indicated below.
Winter position
Unit
Water network
Closed
Closed
Open
IMPORTANT REMINDERS:
Depending on the atmospheric conditions in your
region, you need to:
-
Add an appropriate antifreeze solution agreed by
the manufacturer (maximum of 45%) to protect the
system down to a temperature of 10 K below the
lowest temperature likely to occur locally.
-
For extended shut-downs, drain and add an anti-
freeze solution to the heat exchanger (use the drain
valve located at the water inlet).
-
To prevent corrosion due to differential aeration,
if the system is to be empty for more than 1 month,
the heat transfer fluid circuit should be protected
with a blanket of neutral gas (0.5 bar maximum). If
the heat transfer fluid does not meet the
manufacturer's recommendations, a nitrogen
blanket must be applied immediately.
-
In case of prolonged non-usage, the hydraulic
circuits must be protected by circulating a
passivating solution (consult a specialist).
-
At the start of the next season, refill the unit with
water and add an inhibitor.
-
If auxiliary equipment is installed in the system,
the installer must ensure that the resultant flow
rates are still within the minimum and maximum
values indicated in the operating limits table
(application data).
-
If frost protection is dependent on electric heaters,
never de-energize the unit when frost protection
is required. To ensure protection, the unit's main
disconnect switch and the auxiliary heater
protection circuit breaker must be closed (see
wiring diagram to locate these components). If it
is not to be used in freezing conditions, or during
a prolonged power failure (planned or unplanned),
the water type heat exchanger and external pipes
must be drained without delay. Damage caused by
frost is not covered by the warranty.
-
The heat exchanger temperature sensors are an
essential frost protection element: if piping trace
heaters are used, ensure the external heaters do
not affect the measurements provided by these
sensors.
8 - WATER CONNECTIONS
AQUACIAT
POWER
™ LD/ILD
EN-42
