Hydraulic Connection; Cold Water Connection - Thermor AEROMAX ACCESS Serie Manual

Presentation

4. Hydraulic connection

The use of a sanitary connection is strongly discouraged: such an installation causes water
destratification in the tank and leads to the heat pump and electric heater having to work harder
The cold water inlet has been marked with a blue flange, the hot water outlet with a red one. They have a gas
thread with a diam. 20/27 (3/4").
For regions with water having a high mineral content (Water hardness - Th > 20 °f), water treatment is
recommended. With a water softener, the hardness of the water must remain above 8 °f. The water softener
does not give rise to a waiver of our warranty, provided that it is set up in accordance with good engineering
practices, and regularly checked and serviced.
The hardness criteria must respect that defined by DTU 60.1.

4.1. Cold water connection

Before creating the hydraulic connection, check that the network pipes are clean.
The installation must be performed using a new safety unit rated at 0.7 MPa (7 bar) (not supplied for France)
or a new valve (only available for the model with a coil), in accordance with standard EN 1487 and connected
directly to the water heater's cold water branch connection.
No components (stop valve, pressure reducer, hose etc.) must be positioned between the safety unit
and the water heater cold water branch connection.
Water may flow from the discharge pipe of the
pressure relief valve device; the discharge pipe must
be kept vented. Irrespective of the installation type, it
must include a shut-off valve on the cold water
supply, upstream of the safety unit.
The drain of the safety unit must be connected to the
wastewater to allow free flow, via a siphon. It must be
installed in a frost-free environment. The safety unit
must be activated regularly (1 to 2 times per month).
The installation must include a pressure reducer if the
supply pressure is greater than 0.5 MPa (5 bar). The
pressure reducer should be installed on the general
distribution flow (upstream of the safety unit). A
pressure of 0.3 to 0.4 MPa (3 to 4 bar) is
recommended.
Safety unit or
valve
(model with a
coil)
Cold water
inlet
Siphon
Installation
YES
Use Maintenance
Pressure
reducer
Warranty
NO
Water supply
from the
network
YES
EN
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