3
1
F
ig
. n
o
. 2
2
C
o
n
n
e
c
tio
n
d
ia
g
ra
m
–
M
ix
in
g
h
e
a
tin
g
c
ir
c
u
it
IN
L
E
T
INLET
IN
L
E
T
SERVICE
BOX
SERVICE
BOX
Color of conduit:
BK
Black
BN
Brown
BU
Blue
GNYE
Green-yellow
GREY
Grey
WHITE
White
YELOW Yellow
RED
Red
BT1
SAFETY THERMOSTAT
M2
VENTILATOR SUPPLY
M2
PWM
VENTILATOR SPEED REGULATION
M1
FUEL FEEDER
Y1
MIXING VALVE
Q1
BOILER PUMP
Q2
HEATING CIRCUIT PUMP
Q3
HW CHARGING PUMP
B1
HEATING CIRCUIT TEMPERATURE
BT3
HW TEMPERATURE (THERMOSTAT)
B2
BOILER OUTLET TEMPERATURE
B5
FUEL FEEDER TEMPERATURE
B9
OUTSIDE TEMPERATURE
A6
ROOM DEVICE
TB
MOTOR THERMAL PROTECTION
SERVICE
BOX
SERVICE
BOX
SERVICE
BOX