Installation; Maintenance; Eu Declaration Of Conformity - VAREM MAXIVAREM LS Gebrauchs- Und Wartungsanleitung

INSTRUCTIONS FOR USE AND MAINTENANCE
1. General information.
VAREM membrane expansion vessels and/or pressure tanks are manufactured in ac-
cordance with the essential safety requirements of European Directive 2014/68/EU.
These instructions for use are drawn up in compliance with and for the purpose
set forth in article 3.4 - Attachment I to Directive 2014/68/EU and are enclosed
with the products.
2. Product description and intended use.
- Heating: VAREM expansion vessels are used to absorb the increase in water volume
due to thermal expansion caused by the rise in temperature, thereby limiting the incre-
ase in pressure in the system.
- VAREM membrane pressure tanks are necessary for long-lasting, regular operation of
sanitary water distribution and pumping systems, constituting a reserve of pressurized
water and thereby limiting pump intervention.
- All vessels and/or pressure tanks are designed to be used with group 2 fluids; any
other type of fluid is not permitted (unless otherwise specifically approved in writing
by VAREM).
VAREM expansion vessels and pressure tanks consist of a closed metal container
fitted with an internal membrane. VAREM membranes have a balloon-like conforma-
tion and feature a flange attachment, which prevents water coming into direct contact
with the metal sides of the vessel (the AQUAVAREM line is instead equipped with a
diaphragm membrane featuring a protection liner on the metal wall of the vessel; the
STARVAREM heating line is simply fitted with a diaphragm membrane and has no
protection liner).
Do not hang the horizontal type Aquavarem and Maxivarem LS vessels to the wall (fig.7)
For the Aquavarem 19-25-40L expansion vessels, follow the installation instructions in
figure 8 (provide suitable supports if necessary, see figure 3).
3. Technical Features.
The technical features of the expansion vessels and/or pressure tanks are indicated
on the plate attached to each individual products (article 3.3 - Attachment I to Directive
2014/68/EU). The label indicates: Code, Serial no., Date of manufacture, Capacity,
Operating temperature (TS), Pre-charge, Maximum operating pressure (PS).
The label is attached to the VAREM expansion vessel and/or pressure tank and must
not be removed or the information displayed modified. The products must be used in
compliance with the technical features indicated on the VAREM label and the prescri-
bed limits must under no circumstances be violated.

4. Installation.

- Correct dimensioning of the vessel according to its use; an incorrectly dimensio-
ned vessel and/or pressure tank can cause damage to persons and objects. Dimensio-
ning must be performed by specialised technicians.
- Correct installation performed by specialised technicians in compliance with na-
tional regulations, observing the prescribed tightening torque values of the fitting (fig. 1)
and the assembly suggestions (fig. 2). If several tanks are installed in series or in paral-
lel, they must be connected at the same height. Should vessels with a volume greater
than 12 litres be mounted with the fitting facing upwards, an appropriate support will
be necessary (fig. 3); do not install the tank cantilevered if it is not supported (fig. 4).
- Heating vessels must be installed in close proximity to the boiler and connected to the
return or back-flow piping (fig. 5).
- Pressure tanks must be positioned in the direction of the pump flow (fig. 6).
EXPANSION VESSEL
PROBLEM
System safety valve intervenes
Tank very hot
PRESSURE TANK
PROBLEM
System safety valve intervenes
Tank very hot
Frequent pump interventions
Noisy tank
Vibrations on tank

EU DECLARATION OF CONFORMITY

Varem S.p.a - via Sabbioni, 2 - 35024 Bovolenta (PD) - declares that this Declaration of Conformity is released under its own and sole responsibility and covers the following
products:
Description of products: expansion vessels and/or pressure tanks
Trademark: Varem
Model/Type: see cover of this Declaration of Conformity
The expansion vessels and/or pressure tanks referred to in the above declaration comply with the relevant Union harmonisation Legislation: Pressure Equipment Directive
2014/68/EU (PED).
Categories I and II in accordance with form D1, categories III and IV in accordance with forms B+D (see table on page 3).
The following harmonised Standards have been applied: EN13831:2008.
This Declaration of Conformity covers expansion vessels and pressure tanks bearing the CE mark and included in categories I, II, III and IV. It must not be considered for
equipment included in the category referred to in article 4.3 of Directive 2014/68/EU.
True copy of the original. Bovolenta, 27/02/2020
CAUSE
Inadequate tank volume
Tank discharged
Inadequate pre-charge
Installation on boiler flow piping
CAUSE
Inadequate tank volume
Tank discharged
Inadequate pre-charge
Excessive compression of pre-charge air
Inadequate tank volume
Inadequate pre-charge
Tank does not discharge properly
Defective tank fixing or inadequate tank
discharge
EN
Install the expansion vessel in a suitable place and in a such way as to prevent damage
due to water leaks.
- Pressure on the safety valve, which must be present on the system, must be
lower than or equal to the maximum pressure of the vessel/pressure tank; should
the safety valve be missing and the maximum operating pressure exceeded, damage
may occur to persons, animals and objects.
- The pre-charge pressure stated on the label is intended for standard applica-
tions; it can be adjusted to 0.2 bars lower than the pressure switch start value but
always within a range of 0.5-3.5 bars. The pre-charge must be checked (by means of a
calibrated pressure gauge applied on the valve) before installing the product.
- Prevent corrosion of the tank paint by not exposing it to aggressive environments.
Make sure that the tank does not constitute a conductive part and that there is no stray
current in the system in order to prevent the risk of tank corrosion.

5. Maintenance.

Maintenance and/or replacement must be carried out by specialised, authorised tech-
nicians in compliance with current national regulations, making particularly sure that:
- none of the electrical equipment on the system is live;
- the expansion vessel has cooled down sufficiently;
- the expansion vessel and/or pressure tank is completely drained of water and the air
pressure is discharged before performing any operations on the same. The presence
of pre-charge air is very dangerous and might originate the projection of pieces, which
may cause serious damage to persons, animals and objects. The presence of water in
the tank considerably increases its weight.
Regular checks:
- Pre-charge: check that the pre-charge pressure corresponds to the value indicated
on the label with a tolerance of +/-20% once a year. IMPORTANT: to perform this ope-
ration, the water must be emptied completely from the tanks (empty tanks).
- If the vessel and/or pressure tank is not charged, set the pre-charge value to the same
value indicated on the label.
Visually check once a year that no corrosion has formed on the outside of the tank; in
the event of corrosion the tank MUST be replaced.
To replace the membrane (where possible) observe the procedure and the tightening
torque values indicated on the website www.varem.com
6. Safety Precautions and residual risks.
Failure to comply with the following provisions may cause lethal injuries, damage to
objects and property and make the tank unusable. The pre-charge pressure must be
adjusted within the nominal values in a range of 0.5-3.5 bars. It is forbidden to drill
and/or flame-weld the expansion vessel and/or pressure tank. The expansion vessel
and/or pressure tank must never be uninstalled when in operation. Do not exceed the
maximum operating temperature and/or maximum pressure permitted. It is forbidden
to use the expansion vessel and/or pressure tank for use other than its intended use.
All VAREM expansion vessels and/or pressure tanks are inspected, tested and packed
before being dispatched. The manufacturer is not liable for any damage caused by in-
correct transport and/or handling in the event of failure to use the most suitable means,
which guarantee integrity of the products and safety of persons. VAREM DOES NOT
accept any responsibility whatsoever for damage/injury caused to persons and objects
deriving from improper dimensioning, use, installation or operation of the product or
integrated system. Do not use the LR ranges for sanitary use.
REMEDY
Replace with tank having correct volume
Restore pre-charge
Check that the pre-charge value is 0.2 bars lower than the pressure switch start value (within a range of 0.5-3.5 bars)
Install tank on return piping
REMEDY
Replace with tank having correct volume
Restore pre-charge
Check that the pre-charge value is 0.2 bars lower than the pressure switch start value (within a range of 0.5-3.5 bars)
Replace with tank having correct volume
Replace with tank having correct volume
Check that the pre-charge value is 0.2 bars lower than the pressure switch start value (within a range of 0.5-3.5 bars)
Check that the pre-charge value is 0.2 bars lower than the pressure switch start value (within a
range of 0.5-3.5 bars)
Check that the pre-charge value is 0.2 bars lower than the pressure switch start value (within a
range of 0.5-3.5 bars)