26.11.15
CORFLINOX
Page 15 / 34
EN
4. HYDRAULIC
CONNECTION
Before proceeding with the hydraulic connection, the supply pipes must be thoroughly
cleaned to avoid introducing metal or other particles into the tank.
If metal pipes are used, the connection to the hot water outlet must use a dielectric pipe
joint or cast-iron sleeve to prevent galvanic corrosion (iron-copper). Brass connections
are prohibited here. A certi
fi
ed safety unit or non-return
fl
ap and safety valve assembly is
obligatory.
If the network supply pressure is
≥
5 bar, a pressure reducer must be
fi
tted to the distribution
outlet. A pressure of 3 to 4 bar is recommended. Check that the pressure does not exceed
the service pressure in operation.
Fit a bleed outlet to the tank´s top connection (DHW outlet).
To avoid clogging the installation´s components (heat exchangers, safety valve, safety unit)
with sludge, a
fi
lter must be
fi
tted to the domestic cold water supply outlet feeding the tank.
The domestic hot water in the tank can reach a high temperature. It is thus essential to
fi
t a
thermostatic mixing valve before water is distributed to the taps. The temperature setting at
the taps should comply with the regulations in force.
Recommendations:
In very hard-water regions (Th>20°F), the use of a softener will not
invalidate the warranty as long as the softener is set up in accordance with standard practice
and is checked and maintained regularly.
The water hardness must remain above 12°f.
If COMPOSITE MATERIAL pipes (PER, PVC etc.) are used a temperature limiter must
be
fi
tted to the tank output and adjusted according to the performance of the material
used.
!
4.1. Hydraulic
safety
All installations must include hydraulic protection against:
1. Excess pressure in the distribution network,
2. Excess pressure due to rises in temperature (expansion during heating),
3. Excess pressure due to the failure of a thermostat or a contactor relay.
Drainage due to excess pressure must not be impeded. This means that the drain tube must
have a continuous and suf
fi
cient slope and its diameter must be suited to the network.
Regardless of how the system is installed, it must have a cold water tap upstream of the
safety unit.
4.2. Hydraulic safety dimensions
The safety unit must comply with the standard. It must be positioned directly on the cold
water inlet.
The scale of the hydraulic safety provision depends on the capacity of the device.
Table of recommended hydraulic safety systems for storage tanks:
Storage tank model
300
500
750
910
Safety unit
G 1"
G 1 ¼" (2 x G 1")
