A.O. Smith 30 - Manual (Page 37)

Instruction manual SGS 37
is
The longest pipe must be used to check the maximum length. In this case, the
chimney pipe is the longest. This is 25 metres. This 25 metres is the sum of pipe
sections 1, 2, 3, 4 and 5. The length of the transition piece can be ignored. The
total number of bends used in the flue gas outlet and air supply is 8. The bend
in the transition piece can be ignored. According to the table, 4.6 metres must
be added for each bend. This brings the total pipe length to:
(4.6 x 8) + 25 = 36.8 + 25 = 61.8m.
This is less than the maximum length of 80 metres stated in the table. The
installation therefore fulfils the requirements.
3.11 Electrically
connecting the
appliance
Warning
The installation should be carried out by an authorised installation engineer,
in compliance with general and local regulations (1.3 "Regulations") .
3.11.1 Introduction
Topics covered in this paragraph:
•
Preparation
• Connecting the mains voltage
Optionally, it is possible to connect an isolating transformer, a continuous pump,
a program-controlled pump, an extra ON mode switch and an extra alarm signal
to the appliance. For these options, see:
•
Isolating transformer
• Connecting continuous pump
• Connecting a program-controlled pump
• Connecting an extra ON mode switch ("Tank ON")
• Connecting an extra error signal ('Alarm OUT' )
Connecting the solar heating system is also described:
•
Connecting communication cable to solar heating system
Note
The optional components are not included in the rating for electrical power
consumption stated in the table (3.4.2 "General and electrical specifications") .
3.11.2 Preparation
Caution
The appliance is phase-sensitive. It is absolutely essential to connect the
mains phase (L) to the phase of the appliance, and the mains neutral (N) to the
neutral of the appliance.
Caution
There may be no potential difference between neutral (N) and earth ( ).
If this is the case, then an isolating transformer must be applied in the supply
circuit
(3.11.4 "Isolating transformer") .
For more information or to order this isolating transformer, please contact A.O.
Smith water Products Company.
The figure shows a view of the electrical connector block, and the table shows
the appropriate connections.