24
E
E
E
E
L1 T2N S3T1 B4
IG
11
41
32
32
12
13
31
230V~ 50Hz
2
1
3
4
4-4
24
14
C
2
1
22
12
21
11
C
2
G-V
6-6
7-7
8-8
9-9
10-10
Ts
7
14 15
16
6 95 8 10
B
A
20
21
24
Pi
18
17
23
22
19
11
12
Ipi
Ib
(50°C)
(60°÷90°C)
(54°÷84°C)
(100°C)
Tm
Te1
F1 (max 4 A)
Te2
13
C
N
Ph
B5
T6
T7 T8
1 stage burner plug
st
2 stage burner plug (optional)
nd
3.1 - PANEL BOARD TYPE
21057 - FUNCTIONS
DESCRIPTION
Through the main switch 11 the panel board
and all the equipments connected to it will be
under power.
The switches 12 & 13 switch On and OFF
the power to the burner and the Heating pump
(via a relay, if necessary).
With the thermostat 32 the working
temperature of the boiler can be adjusted.
This thermostat is provided with a DPDT
contact, for the control of a two stage burner.
The differential between the switching points of
the two double pole is 6°C (not adjustable).
The minimum thermostat, accessible through the
opening of the panel board cover, switches
OFF the C.H. pump during the reacing of the
steady state and up to the obtention of 50 °C
within the boiler.
On the electrical supply line to the boiler a
switch with fuses is to be forseen.
3
STANDARD PANEL BOARD
fig. 30
3.2 - ELECTRICAL WIRING DIAGRAM FOR SINGLE PHASE BURNER AND PUMP
Te1 1
st
stage working thermostat (60°C÷90°C)
Te2 2
nd
stage working thermostat (54°C÷84°C)
Tm Minimum thermostat (50°C)
Ts High limit thermostat (100°C)
Pi C.H. pump
A Burner lockout warning lamp (eventual)
Ph Phase (230V ~50Hz)
N Neutral
F1 General fuse (max 4A)
Ib Burner switch
IG Illuminated main switch
Ipi C.H. pump switch
fig. 31
11 Illuminated main switch
12 Burner switch
13 C.H. pump switch
31 High limit thermostat
32 Working thermostat
41 General fuse
42 Thermometer
B Hourmeter for 1
st
stage operation
C Hourmeter for 2
nd
stage operation
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