16
14
1
2
9
3
4
8
7
6
5
BR
BR
BR
BR
BL
BL
GY
Y/G
Y/G
BK
BK
R
INS
TALLER
US
ER
MAINTEN
AN
CE
TECHNI
CI
AN
TECHNI
CAL
D
AT
A
3
CHECKS AND MAINTENANCE
- Check connection to a 230V-50Hz power mains via an omni-po-
lar disconnector (magnetothermal circuit breaker), correct L-N
polarity and the earthing connection;
- check that the magnetothermal circuit breaker is working prop-
erly;
- make sure the central heating system is filled with water and that
the pressure gauge indicates a pressure of 1-1.2 bar;
- make sure that the air valve cap (if present) is open and that the
system is appropriately de-aerated;
3.1 SCHEMA ELETTRICO DIM 2 ZONE ERP.
Key:
B4 - External probe (optional)
M10-1 - Zone 1 pump
M10-2 - Zone 2 pump
R12 - Zone 2 low-temperature flow regulation
trimmer
R13 - Zone 3 low-temperature flow regulation
trimmer
S25 - Board setting selector
S26 - Board setting selector
S27 - Board setting selector
T2 - Zone control unit low-voltage feeder
Z1 - Anti-jamming filter
1 - 230 Vac 50 Hz power supply
2 - Central heating request outlet to boiler
or other DIM ERP
3 - Central heating request inlet from other
DIM ERP
4 - Zones signal state outlet for other DIM ERP
5 - Connection to DIM ERP safety thermostat
6 - Connections to ON/OFF room thermostats
7 - Zones signal state inlet from boiler or
other DIM ERP
8 - DIM BUS connection to boiler
9 - Zones control unit
BK - Black
BR - Brown
BL - Blue
GY - Grey
R - Red
G/Y - Yellow/Green
Zone
Type
Zone 1
Direct
Zone 2
Direct
- check the sealing efficiency of water circuits;
- check the correlation between the electric and hydraulic con-
nections;
-
(only for DIM H-LT or H-2LT ERP)
with request for heat in the
mixed zones, check the correct opening and closure of the mixing
valve, opening the latter to check the system safety thermostat
intervention (the boiler flow temperature must be set over 60
°C).
Even if just one single safety check provides a negative result, do
not commission the system.
