Beretta 20141085, Руководство по установке

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- that the system be always at a pressure higher than the atmos-
pheric one at any point (including the pump suction side) and
under any operating conditions (all seals and hydraulic cou-
plings in a system are designed to withstand pressure towards
the outside, but not underpressure);
- the installation be not made with gas-permeable materials (e.g.
plastic pipes without oxygen barrier for underfloor heating sys-
tems)
b
Damages suffered by the thermal module, caused by encrus-
tations and corrosion, are not covered by warranty. In addition,
the non compliance of the water requirements listed in this
chapter will void the appliance warranty itself.
2.11 System filling and emptying
The thermal module
Power Max BOX
must be provided with a charg-
ing system to be connected to the appliance's return line.
Before filling or emptying the system, switch the system's master
switch to the OFF position and the thermal module's master switch
to (
0
).
2.11.1 Filling
- Make sure that drain cocks (1) are closed before you start
loading the system
1
- Unscrew the vent valve's release cap
- Open the shut-off cocks in order to slowly fill the system
- Use the pressure gauge to check that the pressure is rising
and the water is exiting through the vent valves
- Close the shut-off cocks after the pressure reaches 1.5 bar
- Start the system pumps and the thermal module's pump as
shown in Paragraph "Commissioning and maintenance"
- During this stage, check that the air is correctly eliminated
- Restore the pressure if necessary
- Switch the pumps off and on again
- Repeat the last three steps until the pressure is stabilised
b
The system must be filled up slowly the first time; once it is
filled and the air expelled it should never need to be topped
up again.
b
Systems should also be operated at maximum working tem-
perature the first time they are started up, in order to facilitate
de-aeration. (Gas is not released from the water at low tem-
peratures).
b
An automatic spurge can be performed during the first ignition.
The parameter that set the cycle is Par. 139. See parameter
table for more information.
2.11.2 Emptying
Before starting to empty the appliance and the storage cylinder:
- Switch the system's master switch to the OFF position and the
thermal module's master switch to ( 0 ).
- Close the water supply shut-off cocks;
- To empty the appliance, connect a rubber hose (2) (Øint in-
ternal diameter = 12mm) to the drainage hose connector of
each unit (1).
1
2