11
pic. 5B
Model BTN EV
pic. 5C
Model BTFS E
G: Gas inlet
C: DHW flow
F: Cold water inlet
M: CH flow
R: CH return
G: Gas inlet
C: DHW flow
F: Cold water inlet
M: CH flow
R: CH return
M1: Low temperature zone flow
M2: Low temperature zone return
D: Flue gas outlet
(130 mm for BTN 25,
150 mm for BTN 32 and BTN 42)
