5
GENERAL INFORMATION
GENERAL INFORMATION
1.3
Description of the appliance
TAU N
R
steel boilers are triple flue pass, condensing boilers
for installation in a boiler room. While they are designed pri-
marily for central heating purposes, in conjunction with a suit-
able storage cylinder they can also be used to produce domestic
hot water.
All parts that come into contact with the combustion gases are
made from titanium stabilised stainless steel to ensure maxi-
mum 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 opti-
mise heat exchange and energy efficiency and to maximise the
condensing effect.
The boiler has a high total water content which is differential-
ly distributed between its top and bottom sections. This al-
lows outgoing water to reach the set temperature quickly while
maintaining the condensing effect and the water heating time
around the tube bundle for as long as possible.
TAU N
boilers feature lightly pressurised 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 den-
sity glass wool.
The paint finished external panelling 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 clean-
ing 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.
3
2
1
4
5
6 (*)
7
8 (*)
10
9
11
12
13
14
15
16
19
18
17
1
Burner
2
Flame inspection window with
3
Door
4
Casing
5
Outlet
6
Safety device fitting
7
Heating return (high temperature)
8
Heating return (low temperature)
9
Blind plug
10
Instrument bulb/sensor sockets
11
Combustion chamber
12
Flue gas exhaust
13
Flue gas box
14
Inspection window
15
Condensate outlet
16
Boiler drain
17
Turbulators
18
Flue gas pipes
19
Second flue pass
(*)
On the TAU 1450 N-NC the low temperature heating return (8) is located at the rear of the boiler, and the
safety fitting (6) is flanged.
