HAMWORTHY HEATING LTD
10
PUREWELL VariHeat he
500001155/F
4.5 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 6 amps
•
Wiring must be completed in heat resistant cable size 1.0mm
²
csa.
•
Each module should 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 volt free contacts are used, these too must be individually isolatable.
•
Time clock control should be via the boiler modules Remote On/Off circuit (30V DC).
Any circuit connected to the Remote On/Off MUST be volt free
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 pipework.
FOR DETAILED WIRING INSTRUCTIONS SEE SECTIONS 5.3, 9.0 & APPENDIX B
Figure 4.5 - Electrical Connections
Ea
rt
h
Ne
ut
ra
l
Ne
ut
ra
l
Ne
ut
ra
l
Li
ve
Li
ve
Li
ve
O
v
er
he
at
O
v
er
he
at
No
rm
al
R
un
No
rm
al
R
un
C
o
m
m
on
Fa
ul
t
Co
m
m
on
F
a
ul
t
0~
1
0v
Si
g
na
l
Ou
ts
id
e
Se
ns
or
Se
ns
or
M
a
st
er
S
cr
e
en
Sl
a
ve
S
cr
een
Ca
sc
ad
e
G
ro
und
G
rou
nd
R
e
m
ote
O
n
/O
ff
R
e
m
ote
O
n
/O
ff
Ma
in
s
6A
Si
g
na
l
Se
n
so
rs
230v~50Hz
Volt free contacts
Max 230 v 2A
Casca de
Sh
un
t
Pu
m
p
O
u
tp
ut
1
A
Pri
m
ar
y
Pu
mp
O
u
tput
1A
4~
2
0m
A
