Baxi H2O 40 GL Manuel D'installation, D'utilisation Et D'entretien page 11

Figure 4. Piping Diagram With External Primary Loop For Boilers Without Internal 3-Way Valve Or Not Using The 3 Way Valve
TO SYSTEM
Z3
COLD
WATER
SUPPLY
*
Recirculation Line
See Figure 4
- Boilers with an internal pump and capacity that satisfies the boiler and with an external primary loop, may not need an external pump.
Z2
Z1
DHW
PUMP
<6"
*
ABOVE
GROUND
11
FROM SYSTEM
MAGNETIC DIRT
SEPARATOR
HOT WATER
SUPPLY
TEMPERED
COLD WATER
SUPPLY
PN 615000250 REV. B [01/09/2019]