The cross section of the safety unit discharge pipe must be at least
equal to the cross section of the opening of the safety unit outlet.
Description of the safety unit
9 Isolation valve
17 Drain valve
27 Non-return valve
28 Domestic cold water inlet
29 Pressure reducer
30 Safety unit
54 End of the discharge pipe free and visible 2 to 4 cm above the flow
funnel
55 Domestic hot water diaphragm safety valve, sealed and calibrated
to 7 bar
Sizing the safety unit
The diameter of the safety unit and its connection to the tank must be at
least equal to the diameter of the domestic cold water inlet on the tank.
6.3.2 Connecting the domestic hot water tank to the boiler
See
To connect the domestic hot water tank to the boiler, refer to the
instructions that come with the connection kit.
6.3.3 Connecting the domestic hot water circuit
Warning
When making the connection, it is imperative that the standards
and corresponding local directives be respected.
Caution
If the mains pipes are made of copper, fit a sleeve made of steel,
cast iron or any other insulating material between the domestic hot
water tank's DHW outlet and the pipes to prevent corrosion to the
connection.
Caution
Limit temperature at the draw-off point: the maximum domestic hot
water temperature at the draw-off point is subject to special regu
lations in the various countries in which the appliance is sold in or
der to protect the user. These special regulations be observed
when installing the appliance.
1. Mount a domestic water thermostatic mixer valve (not provided) on
the domestic hot water tank outlet.
2. Install a recirculation loop if necessary.
Domestic hot water recirculation loop
To guarantee the availability of domestic hot water as soon as the taps are
turned on, a recirculation loop between the draw-off points and the domes
tic hot water tank's recirculation pipes can be installed.
Note
Fit a non-return valve into this loop.
Note
Run the domestic hot water recirculation loop via the boiler control
system or an additional timer programmer to optimise energy con
sumption.
Fig.16 Safety unit
L000370-C
(54)
2 cm
9
9
55
29
17
27
30
28
6 Installation
22
EL 110 SL
7626247 - v03 - 29042016
