Technical information

27
Legend:
A-ON/OFF button
B-Green LED (Indicates burner on)
C
-
C
OMFORT button
D-Programming key +
E-Central Heating temperature adjustment
F
-
M
enu button
H-Programming key -
I-Domestic Hot Water temperature adjustment (MFFI only)
K
-
C
omfort function LED (yellow) (MFFI only)
L-Red LED (indicates lockout)
M-Multifunction display
N
-
R
eset button
O-EEPROM key
P-Interface PCB (optional)
FS - Domestic hot water flow switch
NTC1 - Central Heating flow temperature probe
NTC2 - Central Heating return temperature probe
NTC3 - Domestic Hot Water temperature probe
(mod. 27/32 MFFI)
- Connection for boiler thermostat
(mod. 27/32 RFFI SYSTEM)
OP - Time clock
VG - Gas valve
M - Diverter valve (mod. 27/32 MFFI)
CI - Circulation pump with automatic air release valve
MV - Fan
AC - Spark generator
PA - Air pressure switch
TA - Room Thermostat (optional)
TS - Underfloor Heating Safety Thermostat (optional)
CR* - Remote Control (optional)
SE* - External sensor (optional)
*NOT SHOWN
CN1 = FAN
1: Start of coil (black)
2: End of coil (brown)
3: “Hall” sensor power supply 12V (red)
4: “Hall” sensor input (white)
5
:
“Hall” sensor neutral (blue)
6: N
ot used
CN2 = FLAME SENSOR
CN3 = Earth
C
N4 =
P
OWER SUPPLY
1: Live (brown)
2: Neutral (blue)
CN5 = EQUIPMENT
CONNECTIONS
1: Gas valve neutral (blue)
2
:
Gas valve live (brown)
3: Not used
4: Pump (V1) live (red)
5:
Pump (V2) live (black)
6:
Pump (ON/OFF) live (brown)
7:
Pump neutral (blue)
8: 3-way valve (C.H.) (red/black)
9: 3-way valve (D.H.W.)(brown)
10:
3-way valve Neutral (blue)
11: Spark generator Neutral (black)
12: Spark generator live (black)
CN6 = INTERFACE PCB
(OPTIONAL - see Section 2.12)
Accessories:
External sensor
Remote Control CLIMA MANAGER
Secondary outlet (see Section. 2.12)
CN7 = DISPLAY
1: Power 5V
2: Display return
3: Display transmission
4: Earth
CN8 = SENSOR CONNECTOR
1: Central Heating flow sensor (white)
2: Central Heating return sensor (white)
3: Not used
4: DHW flo
w switch (g
re
y)
5: DHW sensor (g
rey)
6:
Air pressure switch (grey)
7: Not used
8:
DHW flow s
witch
ear
th (g
rey)
9:
DHW sensor ear
th (g
re
y)
10: C
.H. flow sensor earth (white)
11: C.H. return sensor earth (white)
12: Air pressure switch (grey)
CN9 = ROOM THERMOSTAT
(OPTIONAL - see Section 2.12)
CN10 =
UNDERFLOOR HEA
TING
SAFETY
THERMOSTAT
(OPTIONAL - Section 2.12)
CN11 = TIME CLOCK
(
see Section 2.12)