FERROLI Divatop H C - Manual (Page 32)

DIVAtop HC
32 EN
cod. 3540S840 - 02/2010 (Rev. 00)
3.5 Electrical connections
Connection to the electrical grid
B
The unit's electrical safety is only guaranteed when correctly connected to an
efficient earthing system executed according to current safety standards. Have
the efficiency and suitability of the earthing system checked by professionally
qualified personnel. The manufacturer is not responsible for any damage
caused by failure to earth the system. Also make sure that the electrical system
is adequate for the maximum power absorbed by the unit, as specified on the
boiler dataplate.
The boiler is prewired and provided with a Y-cable and plug for connection to the elec-
tricity line. The connections to the grid must be made with a permanent connection and
equipped with a bipolar switch whose contacts have a minimum opening of at least 3
mm, interposing fuses of max. 3A between the boiler and the line. It is important to re-
spect the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green
wire) in making connections to the electrical line. During installation or when changing
the power cable, the earth wire must be left 2 cm longer than the others.
B
The user must never change the unit's power cable. If the cable gets damaged,
switch off the unit and have it changed solely by professionally qualified person-
nel. If changing the electric power cable, use solely “HAR H05 VV-F” 3x0.75
mm2 cable with a maximum outside diameter of 8 mm.
Room thermostat (optional)
B
IMPORTANT: THE ROOM THERMOSTAT MUST HAVE VOLTAGE-FREE
CONTACTS. CONNECTING 230 V TO THE ROOM THERMOSTAT TERMI-
NALS WILL PERMANENTLY DAMAGE THE ELECTRONIC BOARD.
When connecting time controls or a timer, do not take the power supply for
these devices from their breaking contacts Their power supply must be by
means of direct connection from the mains or with batteries, depending on the
kind of device.
Accessing the electrical terminal block
After removing the boiler front panel (see fig. 21) the terminal block can be accessed for
connection of the external probe (detail 138 fig. 18), the room thermostat (detail 72
fig. 18) or the remote timer control (detail 139 fig. 18).
fig. 18 - Accessing the terminal block
Hot water tank probe
If a hot water tank probe is used, remove both heating elements from terminals 3-4, then
connect the probe terminals.
Check the Economy/Comfort mode setting (with optional hot water tank installed).
Hot water tank thermostat
If a hot water tank thermostat is used, remove one of the two ends of the 1.8 Kohm re-
sistance. Connect the thermostat contact between the resistance just removed and the
terminal it previously occupied.
In case of a hot water tank thermostat demand, the boiler will only read the 10 Kohm re-
sistance (which simulates a temperature of 25°C). When the hot water tank thermostat
is satisfied, the boiler will read both resistances (that simulate a 70°C higher tempera-
ture).
Check the Economy/comfort mode setting (with optional hot water tank installed).
3.6 Air/fume ducts
The diameter of the flue connection pipe must not be less than that of the connection on
the anti-backflow device. Starting from the anti-backflow device it must have a vertical
section at least 50 cm long. Current standards must be complied with regarding sizing
and installation of the flues and connection pipe.
B
The boiler is also equipped with a safety device (fume thermostat) that stops
operation of unit in case of inadequate draught of obstruction of the flue. This
device must never be tampered with or deactivated.
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 , accordingsec. 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 -) for fig. 110 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 - ) to set parameter 1 (for natural
gas) or fig. 12 (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 fig. 13 and 4 - ) 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. 19 - 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.
Pressure adjustment at the burner
Since this unit has flame modulation, there are two fixed pressure settings: minimum and max-
imum, which must be those given in the technical data table according to the type of gas.
• Connect a suitable pressure gauge to the pressure point "B" downstream of the
gas valve.
• Remove the protection cap "D".
• Operate the boiler in TEST mode.
• Adjust the maximum pressure setting by turning the screw "G" clockwise to in-
crease the pressure and anticlockwise to decrease it.
• Disconnect one of the two fastons "C" from modureg "F" on the gas valve.
• Adjust the minimum pressure setting 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 value remains sta-
ble.
• Reconnect the faston "C" detached from the modureg "F" on the gas valve
• Check that the maximum pressure has not changed
• Refit the protection cap "D.
• To end the TEST mode, repeat the activation sequence or wait 15 minutes.
A After checking or adjusting the pressure, make sure to seal the adjust-
ment screw with paint or a specific seal.
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