A.O. Smith TWI 35-130 Instruction Manual page 28

3
Subject
Roof fl ue terminal set:- 1x Roof fl ue
terminal (incl. clamping strip)
- 1x Pipe 1000 mm
- 1x Mounting fl ange
Piping material
Pipe diameters
(1) It is not allowed to use any other roof fl ue terminal. You can order the roof fl ue terminal mentioning the item
number with A.O. Smith, manufacturer or wholesaler's.
Device Diameter
TWI 35-130 80
TWI 45-190 80
TWI 35-130 100
TWI 45-190 100
(1) The given larger diameter can be used if the maximum running length is insuffi cient. When using a larger
diameter, this shall be used for both the air supply and the fl ue gas discharge.
26
Installation
Specifi cation of concentric roof fl ue terminal C33
Item no.:
Construction:
Manufacturer:
Type :
Construction :
Flue gas discharge:
Air supply:
Flue gas discharge:
Air supply:
3.9.4 Parallel connections
The table gives the maximum pipe length for parallel systems. The maximum
pipe length depends on the selected diameter.
Warning
Mount fl ue gas discharge material with a fall of 5 mm per metre towards
the device.
Requirements for fl ue gas discharge for parallel systems
(1) Maximum running length
30
20
100
75
Use the longest pipe for calculating the pipe length. If, for example, the fl ue gas
discharge pipe is 10 metres and the air supply pipe is 15 metres, use the 15
metres for calculating the length. Then add the Lequivalent to these 15 metres
for each 90° and 45° bend in both the air supply and the fl ue gas discharge. All
this will be explained using a practical example.
Practical example of parallel fl ue gas discharge
Example
The fi gure shows a TWI 35-130. The device is to be provided with a 25 m
parallel pipe with a diameter of 100 mm and eight 90° bends. An inspection
shall be carried out for compliance of the confi guration with the requirements
stated in the table.
Description
TWI 35-130: 0305 042
TWI 45-190: 0305 042
Concentrique
Muelink & Grol
M2000 DDV HR-C
Concentrique
Thick-walled aluminium with lip-ring sealing
Thin-wall galvanised sheet steel
TWI 35-130: Ø 80 mm
TWI 45-190: Ø 80 mm
TWI 35-130: Ø 125 mm
TWI 45-190:Ø 125 mm
L
equivalent
90° bend
3,9
3,9
4,6
4,6
Instruction manual TWI 35-130 G/TWI 45-190 G
(1)
(1)
L
equivalent
45° bend
1,1
1,1
1,2
1,2