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DIVAtop ST F
Connection to multiple flues
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fig. 24 - Examples of connection to flues (
To connect the boiler DIVAtop ST F to a multiple flue or a single chimney with natural
draught, the flue or chimney must be expressly designed by professionally qualified tech-
nical personnel in conformity with the current regulations and be suitable for sealed
chamber units equipped with a fan.
In particular, chimneys and flues must have the following characteristics:
•
Be sized according to the method of calculation given in the current regulations.
•
Be fumetight, resistant to the fumes and heat and impermeable to condensate.
•
Have a round or square section, with vertical run and without constrictions.
•
Have the ducts conveying the hot fumes, adequately separated or isolated from
combustible materials.
•
Be connected to only one unit per floor.
•
Be connected to a single type of unit (or all and only forced draught units or all and
only natural draught units).
•
Have no mechanical suction devices in the main ducts.
•
Be at low pressure, along the entire length, under conditions of stationary operation.
•
Have a collection chamber at their base for solid materials or possible condensate,
equipped with an airtight metal door.
4. SERVICE AND MAINTENANCE
All adjustment, conversion, commissioning and maintenance operations described be-
low must only be carried out by Qualified Personnel (meeting the professional technical
requirements prescribed by current regulations) such as those of the Local After-Sales
Technical Service.
FERROLI declines any liability for damage and/or injury caused by unqualified and un-
authorised persons tampering with the unit.
4.1 Adjustments
Gas conversion
The unit can operate on natural gas or LPG and is factory-set for use with one of these
two gases, as clearly shown on the packing and on the dataplate. Whenever a different
gas to that for which the unit is preset has to be used, a conversion kit will be required,
proceeding as follows:
1.
Replace the nozzles at the main burner, fitting the nozzles specified in the technical
data table in , according sec. 5.3 to the type of gas used
2.
Modify the parameter for the type of gas:
•
put the boiler in standby mode
•
Press the RESET button (detail 8 - fig. 1) for 10 seconds: the display shows
"TS" flashing
•
press the RESET button (detail 8 - fig. 1): the display shows "P01.
•
Press the DHW buttons (details 01 and 00 - fig. 1) to set parameter 1 (for nat-
ural gas) or 2 (for LPG).
•
Press the RESET button (detail 8 - fig. 1) for 10 seconds.
•
the boiler will return to standby mode
3.
Adjust the minimum and maximum pressures at the burner (ref. relevant para-
graph), setting the values given in the technical data table for the type of gas used
4.
Apply the sticker contained in the conversion kit, near the dataplate as proof of the
conversion.
TEST mode activation
Press the heating buttons (details 3 and 4 - fig. 1) at the same time for 5 seconds to
activate the TEST mode. The boiler lights at the maximum heating power set as de-
scribed in the following section.
The heating symbol (detail 24 - fig. 1) and DHW symbol (detail 12 - fig. 1) flash on the
display; the heating power and lighting power will be displayed alongside.
fig. 25 - TEST mode (heating power = 100%)
To deactivate the TEST mode, repeat the activation sequence.
The TEST mode is automatically disabled in any case after 15 minutes.
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= Air /
= Fumes)
eco
bar
cod. 354
Adjustment of pressure at burner
Since this unit has flame modulation, there are two fixed pressure values: the minimum
and maximum, which must be those given in the technical data table according to the
type of gas.
•
Connect a suitable pressure gauge to pressure point "B" downstream of the gas
valve.
•
Disconnect the pressure compensation tube "N".
•
Remove the protection cap "D".
•
Operate the boiler in TEST mode.
•
Adjust the maximum pressure by turning the screw "G" clockwise to increase the
pressure and anticlockwise to decrease it.
•
Disconnect one of the two fastons "C" from the modureg "F" on the gas valve.
•
Adjust the minimum pressure by turning the screw "E" clockwise to increase the
pressure and anticlockwise to decrease it.
•
Turn the burner on and off, checking that the minimum pressure remains stable.
•
Reconnect the faston "C" detached from the modureg "F" on the gas valve
•
Check that the maximum pressure has not changed
•
Reconnect the pressure compensation tube "N".
•
Refit the protection cap "D".
•
To end the TEST mode, repeat the activation sequence or wait 15 minutes.
After checking or adjusting the pressure, make sure to seal the adjust-
A
ment screw with paint or a specific seal.
H
F
R
B A
L
N
A
Upstream pressure point
B
Downstream pressure point
C
Modureg electrical connection
D
Protection cap
E
Minimum pressure adjustment
F
Modureg
G
Minimum pressure adjustment
H
Compensation tube connection
I
Gas valve electrical connection
L
Sealed chamber
M
Pressure gauge
N
Compensation tube
R
Gas outlet
S
Gas inlet
Heating power adjustment
To adjust the heating power, switch the boiler to TEST mode (see sec. 4.1). Press the
heating buttons (details 3 and 4 - fig. 1) to increase or decrease the power (min. = 00
- max. = 100). Press the RESET button within 5 seconds and the max. power will remain
that just set. Exit TEST mode (see sec. 4.1).
Lighting power adjustment
To adjust the lighting power, switch the boiler to TEST mode (see sec. 4.1). Press the
DHW buttons (details 1 and 2 - fig. 1) to increase or decrease the power (min. = 00 -
max. = 60). Press the RESET button within 5 seconds and the ignition powerwill remain
that just set. Exit TEST mode (see sec. 4.1).
- Rev. 00 - 09/2013
D
I
E
G
S
C
M
B
fig. 26 - Gas valve
EN
F
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