State Water Heaters SCE 65-400, Installation, User And Service Manual

Page: 31 / 72

Electrical connection
Release R.1.0 Uk 31
is
3.10 Electrical
connection Warning
The installation should be carried out by an approved installer in accordance
with the general and local regulations in force of gas, water supply and
power supply companies and the fire brigade.
See also paragraph
’1.3 Regulations’ .
3.10.1 Introduction
The following will be examined in turn in this paragraph:
•
3.10.2 Preparation ;
• 3.10.3 Mains voltage ;
• 3.10.4 Week timer circuit
• 3.10.4 Week timer circuit
• 3.10.5 Extra fault sensor ('Fault output')
3.10.2 Preparation
c Note
The appliance is phase-sensitive. It is an absolute requirement that the
phase (L) from the mains supply is connected to the phase of the appliance
and the neutral (N) from the mains supply is connected to the neutral of the
appliance.
Furthermore, there should not be
any voltage differential between neutral
(N) and earth (
A
). If this is the case then an isolating transformer should be
used. For further information or information on how to order this isolating
transformer, please contact State.
Figure 3.6 shows a front view of the electrical connecting block. Table 3.8
shows the associated connections.
Table 3.8 Electrical connecting block SCE
Mains voltage Flue gas
protection
Week timer circuit Free Potential-free
contact
A
L
1
N L
2
L
3
N N L L L L - NO P NC
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15