HAMWORTHY HEATING LTD
13
FLEET V series
500001217/D
4.6 Electrical Supply
WARNING! THIS APPLIANCE MUST BE EARTHED IN ACCORDANCE WITH IEE
REGULATIONS
•
Boiler electrical supplies must not be switched by a time clock.
•
Boilers are suitable for 230Volt, 50Hz supply.
•
External fuses should be rated for 15 amps
•
Wiring must be completed in heat resistant cable size 1.0mm
²
csa.
•
Each boiler MUST have individual means of isolation.
•
Electrical isolators must facilitate complete electrical isolation.
•
Electrical isolators must have contact separation of minimum 3mm in all poles.
•
Electrical isolators must be installed in readily accessible locations.
•
Electrical supplies to boiler modules should only serve the boiler.
•
Where an external alarm is required, terminals are provided which are volt free and
rated at 230v.
•
Time clock control should be via the boiler modules stop/start circuit (24V DC).
•
Any interlock circuit must be in series with the time control for each circuit. The
interlock circuit must never be used to isolate the boiler electrical supply.
ADDITIONAL INFORMATION REGARDING ELECTRICAL SUPPLIES IS GIVEN IN BS
EN60335, Part 1.
NOTE: The appliance must be isolated from the electrical supply if electric arc welding
is carried out on connecting pipe work.
FOR TYPICAL SCHEMATIC DETAILS SEE FIGURE 4.6
FOR DETAILED WIRING INSTRUCTIONS SEE FIGURES 9.3.1
AND APPENDIX B
Figure 4.6 - Wiring Schematic
E
ar
th
M
ains
Supply
S
ec
on
da
ry
P
um
p O
ut
pu
t
23
0v
~5
0H
z
P
ow
er
ed
O
ut
pu
t S
up
ply
L
ive
L
iv
e
L
ive
Lo
ck
-O
ut
C
on
ta
cts
ra
te
d
P
ow
er
ed
O
u
tp
ut
2
30
V
~5
0H
z,
M
ax
1
A
(O
p
tio
n
1
)
Lin
e O
ut
Lin
e O
ut
N
eu
tra
l
N
eu
tra
l
N
eu
tra
l
N
eu
tra
l
N
eu
tra
l
N
or
m
al
R
un
B
M
S
In
pu
t S
ig
na
l
Lo
ck
-O
ut
B
M
S
O
ut
p
ut
L
ow
V
ol
ta
g
e
(O
p
tio
n
2
)
N
or
m
al
R
un
R
em
ote
O
n/O
ff
I
np
ut
S
ig
na
l
A
na
lo
gu
e
I
np
ut
O
uts
id
e
S
en
so
r
S
afe
ty
In
te
rlo
ck
(L
in
k I
f N
ot
U
se
d)
L
P
B
B
us
24
V
D
C
0~
10
V
G
ro
un
d
G
ro
un
d
G
ro
un
d
G
ro
un
d
G
ro
un
d
5V
D
C
24
V
D
C
S
la
ve
S
ig
na
l
N
O
T
U
S
E
D
N
O
T
U
S
E
D
N
O
T
U
S
E
D
