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15
10
1
2
BK
BK
BL
BL
BL
BR
BR
BR
INS
TALLER
US
ER
MAINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
3.3 WIRING DIAGRAM - BOILER CONNECTION USING ERP DIM BASE EXTERNAL RELAY.
If a remote control or zone control room thermostat is used, its
electric connection must be made directly to the boiler, as de-
scribed in the relative instruction book.
Key:
M10-1 - DIM zone 1 pump
K1 - External relay (optional)
S1 - External relay contact (optional)
S20 - Room thermostat (optional)
1 - Boiler ignition request
2 - 230 V ~
BK - Black
BL - Blue
BR - Brown