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Instructions for the installer
3.11 -
PRESSURE RELIEF VALVE DRAIN
PIPE
WARNING!
Please remember that it is forbidden to
interpose, between the boiler and the
pressure relief valve, any type of cutting-off
device. Moreover it is recommended to use
cutting-off valves which do not exceed the
maximum allowable operating pressure.
WARNING!
In correspondence to the heating pressure
relief valve foresee the installation of a
discharge pipe with a funnel and a siphon
which lead to an adequate drainage. The
drainage has to be controllable by sight.
If this precaution is not made, an eventual
intervention of the pressure relief valve could
cause injury to persons, animals or damage
to property. The manufacturer shall not be
held liable for any injury and/or damage.
This relief valve comply with the standard for
Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply Systems ANSI
Z21.22b-01(R08)/CSA 4.4b-01(R08)
and/or the standard Temperature, Pressure,
Temperature and Pressure Relief Valves and
Vacuum Relief Valves CAN1-4.4-M80
3.12 - WORKING PRESSURE
The boiler's maximum allowable working pressure is set at
92 psa (634 kPa); whilst the minimum pressure is pre-
charged to 7,3 psa (50 kPa).
22
3.13 - CONNECTING THE EXPANSION
VESSEL IN A SINGLE BOILER
SYSTEM
CAUTION
Damage to the installation due to faulty
pressure relief valve.
-
The expansion vessel must be of sufficient capacity.
-
Connect the expansion tank to the boiler return.
If a check valve is available: connect the expansion vessel
to the CH side of the check valve in the return circuit
NOTICE
The expansion tank is NOT a part of the delivery
and should be sourced locally. Please refer to
the expansion tank manufacturer for further in-
formation.
Fill expansion tank to a minimum of 14.5 psi.
3.14 - UNDERFLOOR HEATING SYSTEM
(PLASTIC PIPES)
NOTICE
When using oxygen-permeable pipes, e. g. for floor heating
systems, you must separate the system using plate heat
exchangers.
No recourse can be made to the terms of the warranty in the
event of failure to observe the regulations pertaining to plastic
underfloor heating pipes.
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