4.3 Plumbing circuit
A
278
193
154
252
A
Plumbing circuit model Reply 51/i
B
Plumbing circuit model Reply 71/i-101/i
7
Gas inlet
10
System delivery
11
System return
16
Fan
32
Heating circulating pump
44
Gas valve
154 Condensate drain pipe
161 Condensing heat exchanger
186 Return sensor
193 Trap
252 3-way drain and shut-off cock
253 Shut-off cock
278 Double sensor (Safety + Heating)
90
44
16
161
278
186
278
193
154
32
193
154
253
252
7
252
10
11
fig. 43 - Plumbing circuit
cod. 3540H322 - 09/2008 (Rev. 01)
Reply 51 - 71 - 101
B
44
16
161
186
44
16
161
186
32
32
253
253
7
10
11
EN