19
3 9 Hydraulic diagrams
SINGLE BOILER INSTALLATION
Water circuit schemes legend
1
Heat generator
2
Fuel shut-off valve probe pit
kit D
3
Lockout thermostat with manual reset,
INAIL certified [100(0-6°C)]
kit E
4
Sump for test thermometer
kit E
5
Thermometer, INAIL certified (scale
from 0 to 120°C)
kit E
6
Safety valve, INAIL certified (3.5 bar)
kit E
7
Lockout pressure switch with manual
reset, INAIL certified
kit E
8
3-way valve with pressure gauge hold-
er and test flange for sample pressure
gauge
kit E
9
Bypass damper coil
kit E
10
Pressure gauge, INAIL certified (scale
from 0 to 6 bar)
kit E
11
Fuel shut-off valve, INAIL certified
(calibrated to 97°C) - capillary probe
length 5m
kit D
12
Expansion tank fitting
kit C
13
Return line shut-off valve
kit C
14
3-way delivery line shut-off valve
kit C
15
3-way storage tank connection valve
(*)
kit B
16
Storage tank delivery line "T" connec-
tion
kit B
17
Hydraulic separator
kit A
18
Gas cock
19
Check valve
kit C
(*)
Not necessary for the R.S.I. version
b
For the electrical connection of the INAIL certified
pressure switch and safety thermostat, follow the in-
dications provided in the following scheme.
L
N
SAFETY
THERMOSTAT
SAFETY
PRESSURE
SWITCH
C
C
2
LINE
MOTOR
BOILER
Fig. 13
15
16
13
16
10
9
8
7
3
6
5
4
14
19
11 12
13
17
13
19
17
15
12
C
D
B
B
A
A
F
E
Fig. 14
A
water separator kit
B
3-way valve kit for storage tank
C
INAIL connection kit
D
fuel shut-off valve kit
E
INAIL kit
F
system shut-off valves kit
