Baxi POWER HT 1.850 Manual De Uso Destinado Al Usuario Y Al Instalador página 25

12.7 DOMESTIC HOT WATER CIRCUIT ELECTRIC PUMP CONNECTIONS
Fit the hot water tank after the hydraulic header.
Connect the pump of the external DHW boiler to terminals 13-14 on terminal block M3 (figure 9).
Make sure that the pump has the following specifications:
230 V AC; 50 Hz; 1 A max; cos
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
priority NTC sensor, which is supplied as an accessory.
The sensing element of the NTC device must be located in the pocket provided on the storage tank (figure 11).
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.
Figure 11
If the installation is divided into zones, a relay has to be de-activated to switch off power to the zone pumps,
as shown in the diagram in figure 10.
ISTRUCTIONS PERTAINING TO THE INSTALLER
ϕ > 0.8.
block
25
M2 (figure 11), and connect the domestic hot water
DHW BOILER CONNECTION DIAGRAM
LEGEND:
UB - D.H.W. STORAGE TANK
M2 - TERMINAL BOARD
SB - D.H.W. PRIORITY SENSOR
RE - RESISTOR TO BE REMOVED
MR - CENTRAL HEATING FLOW
RR - CENTRAL HEATING/DHW RETURN
MB - D.H.W. STORAGE TANK FLOW
RB - D.H.W. STORAGE TANK RETURN
P1 - CENTRAL HEATING PUMP
P2 - D.H.W. STORAGE TANK PUMP
TS - SAFETY THERMOSTAT
PS - SAFETY PRESSURE SWITCH
7650231.02 - en