37
4.5.5
Electrical supply connection
The boiler is supplied with a three-poled power cable, already connected to the electronic board and it is provided with an anti-rupture
firming clamp.
The boiler is to be connected to a 30V~50Hz electrical power supply.
When connecting the boiler to power mains, follow correct phase/neutral polarity sequence.
Installation standards BS7671 IEE WIRING REGS must be complied with and are which are considered herein integrally transcribed.
An easy accessible two-poled switch is to be installed externally to the boiler, in an easy to reach position. The switch minimum distance
between contacts is to be 3 mm.
The switch is to allow power supply interruption in order to safely perform maintenance and service procedures.
Power supply to the boiler is to be fitted with a differential magnetic-thermal automatic switch of appropriate shut-down capacity.
Electrical power supply is to be appropriately earthed.
The above mentioned safety measure is to be verified. When in doubt, ask a qualified technician to thoroughly check the power network.
DO NOT:
•
touch the electrical connections with wet hands
•
put any electrical cables under stress
•
leave the electrical components exposed to weather conditions
Check and inspect the cable supplied with the boiler do not use if this cable is damaged. The boiler should be
connected in line with the requirements of the IEE electrical regulations and should only be connected by a competent
person.
The manufacturer shall not be held responsible for any damage due to failure in grounding the system: gas, hydraulic,
or CH system pipes are not suitable for grounding power networks.
4.5.6
Selecting central heating output range
CH water temperature adjusting choice depends on selected operation range:
-
standard range:
from 0 °C to 78 °C (from full counter-clockwise position to full clockwise position);
-
reduced range:
from 0 °C to 45 °C (from full counter-clockwise position to full clockwise position).
Act on
trimmer (pic. 7) in order to choose the operation range, as per the following instruction:
-
standard range:
turn
trimmer fully clockwise;
-
reduced range:
turn
trimmer fully counter-clockwise.
When the external probe is installed,
trimmer function varies (see paragraph 4.5.8.).
Central heating output range selection, alter the waiting time between ignition sequences, preventing frequent ignition and switching off
of the boiler, when in CH mode:
- standard range: 4 minutes;
- reduced range: minutes.
Should water temperature in the system fall below a determined value (no. 17 chart), waiting time procedure is aborted and the boiler
re-ignited.
Operation range selection is to be implemented by a fitter or an authorized Service Centre.
Selected range
Re-ignition temperature
Range standard Set-point > 55°C
Set-point ≤ 55°C
< 40°C
Tset-point - Tflow > 15°C
Reduced range Regardless of set point
< 0°C
Table 17 - Burner re-ignition temperatures
Summary of Contents for Tahiti Condensing 24 kW Combi (KC)
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