Baxi LUNA HT 1.450 Installers And Users Instructions page 84

13.6 Connecting the
IT
pump – hot water circuit
DE
GB
CZ
HU
RO
The domestic hot water pump, which directs flow into an eternal storage tank, is connected to termi-
nals 13-14 of boiler terminal strip M3 (figure 10).
The electrical specifications of the pump must be as follows:
230 V AC; 50 Hz; 1 A max; cos φ > 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.
STORAGE TANK CONNECTION DIA-
GRAM
KEY:
UB - DOMESTIC HOT WATER HEATER
UNIT
UR - CENTRAL HEATING UNIT
M2 - CONNECTION TERMINAL BOARD
SB - DOMESTIC HOT WATER PRIORITY
SENSOR
MR - CENTRAL HEATING DELIVERY
MB - DOMESTIC HOT WATER HEATER
DELIVERY
RR - CENTRAL HEATING/BOILER RETURN
P1 - CENTRAL HEATING PUMP
P2 - D.H.W. PUMP
Figure 12
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