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Product Description
The high efficiency SB Series boilers are designed to condense flue
gases through a unique three-pass construction for installation in a
mechanical room. While they are designed primarily for central heating
purposes, in conjunction with a suitable storage tank they can also be
used to produce domestic hot water.
All parts that come into contact with the combustion gases are made
from titanium stabilized stainless steel to ensure maximum resistance to
the corrosive action of acid condensation.
The boiler has been designed with the combustion chamber at the top
and the smooth pipe tube bundle at the bottom to optimize heat
exchange and to maximize the condensing effect.
The boiler has a high total water content which is differentially
distributed between its top and bottom sections. This hydraulic feature
allows outgoing water to reach the set temperature quickly while
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Fig. 1 Main components
[1]
Paneling
[2]
Heating flow outlet
1)
[3]
Safety device fitting
[4]
Heating return (high temperature)
[5]
Heating return (low temperature)
[6]
Instrument for bulb/probe socket
[7]
Combustion chamber
1) On the 1550WS model the low temperature heating return is located at the rear
of the boiler.
2) On the 745WS models (800-1550) the safety device fitting is flanged.
SB625WS/SB745WS
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2)
maintaining the condensing effect and the water heating time around the
tube bundle for as long as possible.
The boilers feature lightly pressurized combustion chambers for a
smoother burner action, and high temperature resistant, stainless steel
turbulators inside the tube bundle for maximum burner efficiency.
The boiler body is thoroughly insulated with a layer of high density glass
wool.
The paint finished external paneling is also internally insulated with a
layer of high density glass wool.
The boiler's front door and the flue gas chamber can be opened
completely to facilitate the inspection, maintenance and cleaning of
internal parts and to speed up servicing in general.
The front door can open in either direction and can be opened without
removing the burner. The door is factory fitted with hinges on the left,
but these can be reversed if necessary to suit individual installations.
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[8]
Flue connection
[9]
Flue gas box
[10] Inspection port
[11] Condensate drain
[12] Boiler drain
[13] Turbulators
[14] Flue pipes
[15] Second flue pass
[16] Burner
[17] Flame inspection window with pressure measurement point
[18] Door
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6 720 805 218-01.1T
6 720 805 218 (2013/02)
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