Connecting The Mains Supply - Baxi Luna HT 1.850 Gebrauchsanleitung

13. ConneCtIng the maIns supply

Electrical safety of the appliance is only guaranteed by correct grounding, in compliance with the applicable
laws and regulations.
Connect the boiler to a 230V monophase + ground power supply by means of the three-pin cable supplied
with it and make sure you connect polarities correctly.
use a double-pole switch with a contact separation of at least 3mm in both poles.
In case you replace the power supply cable fit a HAR H05 VV-F' 3x­0.75mm cable with an 8mm diameter
2
max­.
The fuse, a fast-acting type rated 2A, is incorporated into the power supply terminals (remove the black fuse
holder to enable inspection and/or replacement).
IMportant: Check that the overall current drawn by accessories connected to the appliance is less than 2
A. If the value is greater, a relay must be wired between the boiler control circuit board and the accessories
drawing the higher current.
Cover
Terminal board
Terminal board
Cover
Terminal board
Figura 9
13.1 ConneCtIng the pump - heatIng system
Turn the control box­ downwards and access the terminal blocks M1 and M3 by taking off the main protective
cover.
The pumps of the heating system (P1 and P2) have to be connected to boiler terminal block following the wir-
ing of figure 10, a relay must be wired between the boiler control circuit board and the pumps.
If the boiler unit's electronic card is wired up to a single pump with these characteristics
230 V ac; 50 hz; 1 a max; cos f > 0.8.
then it is not necessary to add a relay.
Check the correct size and rating of the pump by referring to graph n° 1, which shows the boiler pressure
losses.
InstructIons pertaInInG to the InstaLLer 912.198.1 - GB
95