Electrical Connection; Introduction; Preparation - A.O. Smith 28 30 50 60 Installation & Service Manual

3
3.10 Electrical
connection
3.10.1
3.10.2
Table 3.10 Electrical connection block
Unu Tank on Continuous
sed pump
A
X X L
1 2
1-4 5 6 7 8
30
Installation
Warning
The installation should be carried out by an approved installer in compliance
with the general and local regulations imposed by the gas, water and power
supply companies and the fire service.
Refer also to paragraph

Introduction

Topics covered in this paragraph:
• 3.10.2

Preparation;

• 3.10.3 Mains voltage;
Optionally, it is possible to connect an isolating transformer, a continuous pump,
a program-controlled pump, a
For these options, see:
• 3.10.4 Isolating Transformer;
• 3.10.5 Continuous
• 3.10.6 program-controlled
• 3.10.7 Extra ON mode switch ("Tank
• 3.10.8 Connecting extra error signal ("Alarm
n Remark
The optional components are not included in the rating for electrical power
consumption (see tables in paragraph 3.4).
Preparation
c Note
The appliance is phase-sensitive. It is absolutely essential to connect the
phase (L) from the mains to the phase of the appliance, and the neutral (N)
of the mains to the neutral of the appliance.
There should also be no potential difference present between neutral (N)
A
and earth ( ). If this is the case, then an isolating transformer must be
applied in the supply circuit. See
Figure 3.6 shows a view of the electrical connection block.
associated connections.
Regulated Alarm Off
pump
A
N N L X X
1
9 10 11 12 13 14
'1.3 Regulations'.
"
Tank ON" and an "Alarm OFF" to the appliance.
pump;
pump;
ON");
'3.10.4 Isolating
Isolating transformer
primary
A A
N L N
2
15 16 17 18 19
is
OUT").
Transformer'.
Table 3.10 shows the
Mains power
secondary
A
L N L
20 21 22 23 24
Instruction Manual BFC
A