Beretta MYNUTE GREEN 28 C.S.I. Manual De Instalacion Y Uso página 6

3
.
Position and dimensions of hydraulic connections are specified in
figure 2:
A - CH return
B - CH delivery
C - gas connection
D - DHW outlet
E - DHW inlet
F - Support plate
G - Pre-installation template.
If water hardness exceeds 28°Fr, it is recommended to use water
softeners, to prevent any limestone deposit in boiler due to exces-
sively hard water.
4
INSTALLING THE EXTERNAL PROBE
.
The correct position of the external probe is essential for the
climatic control function to run properly.
Install the supplied probe outside the building about 2/3 up the
NORTH or NORTH-WEST wall and far from flue pipes, doors,
windows and sunny areas.
Attaching the external probe to the wall
- To access the terminal board and anchor holes, unscrew the
plastic probe cover from the housing by rotating it anticlockwise
- Mark the points where the holes will be drilled using the probe
housing as a template
- Remove the box and drill holes for 5x25 expansion grips
- Fix the housing to the wall using the two supplied expansion
grips
- Unscrew the cable-holding nut, insert the bipolar cable (with a
cross section between 0,5 and 1mm
connection between the probe and the boiler
- For the electrical connection between the external probe and
the boiler, refer to the chapter "Electric connection"
- Tighten the cable-holding nut properly and close the cover of
the protective box.
The probe must be positioned on a smooth surface. In the
case of a brick wall or a wall with an irregular surface, provision
must be made for a smooth contact surface.
The maximum length of the connection between the external
probe and the boiler is 30 m.
The connection cable between the probe and the boiler must
not have connections. If these prove to be necessary, they
must be made watertight and suitably protected.
Any ducts for the connection cable must be separate from
other power lines (230 V.a.C.).
5
.
The outlet collector (A, fig. 4) collects: the condensate water, any
evacuation water from the safety valve and the system outlet water.
Use the supplied rubber hose to connect the manifold to a
suitable waste water collection and discharge system, in
compliance with current legislation.
The outlet connection line must have a guaranteed seal.
The manufacturer is not responsible for any damage caused
by the lack of a collection system.
6
.
Before connecting appliance to gas pipe network, check the
following:
• regulations in force are met
• gas type used is the same as set for appliance operation
• pipes are clean.
HYDRAULIC CONNECTIONS
3/4"
3/4"
3/4"
1/2" (solo C.S.I.)
1/2" (solo C.S.I.)
2
, not supplied) for the
CONDENSATE COLLECTION
GAS CONNECTION
Gas must be piped externally. If the pipe goes through a wall it
must go through the central opening in the lower part of the
template. It is recommended to install an appropriately sized filter
on the gas line in case gas from the mains contains some small
solid particles. After installation make sure that all the joints have
been made airtight conforming to standard installation practices.
7
.
To access the electrical connections, proceed as follows:
- loosen the two fixing screws (D) and remove the shell (fig. 5)
- release the panel and turn it forwards
- open the terminal board cover by loosening the fasteners (fig. 6).
Connect the appliance to the mains power supply with a switch
featuring a distance of at least 3,5 mm (EN 60335-1, category III)
between each wire.
The appliance operates with an alternating current of 230 Volt/50
Hz, has a power input of 165W (25 R.S.I. - 28 C.S.I. - 32 C.S.I. - 35
R.S.I. - 36 C.S.I.) and 150W (15 R.S.I.) and complies with EN 60335-
1 standard.
Connect the boiler to an safe earth circuit according to current
legislation.
The installer is responsible for ensuring the appliance is
suitably earthed; the manufacturer declines all liability for any
damage deriving from incorrect or omitted earthing.
Live and neutral (L-N) connections should also be respected.
The earth conductor must be a couple of cm longer than the
others.
The boiler can operate with phase-neutral or phase-phase power
supply.
For floating power supply, without an earth-bonded conductor, it
is necessary to use an insulation transformer with secondary
anchored to ground.
Gas and/or water pipes may not be used to earth electrical
equipment.
Use the supplied power cable to connect the boiler to the mains
power supply.
Connect the ambient thermostat and/or external programmable
timer clock as shown in the electrical diagram on page 118.
When replacing the power cable, use a HAR H05V2V2-F cable,
3x 0,75 mm 2 , max. external Ø 7 mm.
8
FILLING AND EMPTYING THE SYSTEM
.
After making the hydraulic connections, fill the heating system.
This must be done while the installation is cold by:
- giving two or three turns to the cap of the lower automatic air vent
valve (A, fig. 7-8) to open it
for C.S.I. models:
- make sure the cold water inlet tap (B, fig. 7) is open
- open the filling tap (C, fig. 7) until the pressure indicated on the
water gauge is between 1 bar and 1.5 bar (fig. 9)
- close the filling tap.
for R.S.I. models:
As the boiler does not have a manual filling tap, install an
external tap or check whether the external water tank is
fitted with one.
- fill the system using the external tap until the pressure indicated
on the water gauge lies between 1 bar and 1.5 bar (fig. 9)
- close the external filling tap.
N.B.: the boiler is automatically vented through the two automatic
air vent valves A (fig. 7-8) and E (fig. 10), the first is positioned on
the circulator while the second is located inside the air distribution
bos
If the venting phase proves to be difficult, proceed as follows.
6
ELECTRIC CONNECTION