Baxi LUNA HT 1.350, Instructions Manual

Page: 93 / 104

93
instructions pertaining to the instaLLer 924.493.3
it
at
gB
Figure 12
storage tanK
connection DiagraM
KeY:
uB - DOMESTIC HOT WATER HEATER UNIT
ur
- CENTRAL HEATING UNIT
M2 and M3 - CONNECTION TERMINAL BOARD
sB - DOMESTIC HOT WATER SENSOR
p1 - LOW LOSS HEADER PUMP
p2
- CENTRAL HEATING PUMP
p3 - D.H.W. PUMP
si - LOW LOSS HEADER
The domestic hot water pump (P3), which directs flow into an eternal storage tank, is connected to terminals 13-14 of
boiler terminal strip M3 (figure 12).
The electrical specifications of the pump must be as follows:
230 V ac; 50 hz; 1 a max; cos
f
> 0.8.
If the specifications of the installed pump are different, a relay must be wired between the boiler control circuit board and
the pump.
Remove the resistor from terminals 9-10 of terminal strip M2 (figure 12), and connect the hot water priority NTC sensor,
which is supplied as an accessory.
The sensing element of the NTC device must be located in the recess provided on the storage tank (figure 12).
The temperature and on-off programming of the domestic hot water supply are selected directly from the boiler control
panel, as described in this manual under the user instruction headings.
0603_1702/CG_1790
13.6 connecting the pump - hot water circuit
CAUTION:
In the case of a direct coupling of the boiler coil fitting on the boiler unit’s “T” fitting it is necessary to modify the control
of pump P1.
Configuration of parameter for electronic card H632 = 00001000. (See § 15).