Potterton Eurocondense Plus Installation Manual page 26

HYDRAULIC CIRCUITS (EXAMPLES)
Example 11:
(Hydr. System "80")
B9
T
Hydraulische Weiche,
Sonderzubehör
(bauseits)
Legend:
A6 Room control QAA 70 or QAA 50
B1 Flow sensor QAD 21
B3 Tank sensor QAZ 21
B9 Outdoor temp. sensor QAC 31
B10 Flow sensor QAD 21
B70 Return sensor QAD 21
K1 Bus module CIB
26
Boiler cascade with 2 EUROCONDENSE PLUS and BCA 2: 1 CTC and 1 VTC
(up to 15 circuits possible) including DHW tank temperature control (via BCA 2)
B3
T
Header
B10
T
B70 T
Mains
NETZ
230V AC
N, N8, K1, N7
M 2)
Boiler 1
SGB 2 (Nr. 1)
M Boiler pump (exit M1 of
individual boiler
M1 Pump, CTC of the BCA or
primary loop pump
M2 Pump VTC
M3 Tank charging pump
N Control unit LMU
A6
M3
1)
M1
1)
M5
Mains
NETZ
230V AC
N, K1, N7
M 2)
Boiler 2
SGB 2 (Nr. 2)
1)
Mains
NETZ
230V AC
A6
N7
B1
T
M2
M
Y1
Hinweis: Bei Anlagen ohne hydraulischer Weiche
Note: In applications without primary loop,
entfällt der Rücklauffühler B 70
return sensor B70 is not used.
N7 EC M / EC ZR 1/2 EC MSR
for mixer circuits
N8 EC BCA
Y1 3 way valve *)
1) M1 or M5, before or behind the tank,
see param. 99 of BCA 2 for details
to other circuits
zu weiteren
with ZR EC 1/2
Heizkreisen mit
or
ZR EC 1/2
EC MSR
bzw. EC MSR