3
1
= B
= D
= A
= C
34
PLANNING THE AIR/FLUE DUCT LAYOUT
Flue restrictor rings
The flue restrictor ring marked A, or
C / D is packed with the boiler
connection accessories. The restrictor
ring should be fitted as shown in the
diagram according to the equivalent
flue length in the table.
The total equivalent flue length is the
total length of the flue (including the
terminal assembly for vertical flues),
plus the resistance of any bends or
elbows used.
-
equivalent length of 87° elbow is
2.5 m
-
equivalent length of 45° elbow is
1 m
• Push the restrictor (
1
) into the flue
connection of the appliance (
3
).
• Connect the flue outlet adaptor (
2
)
into the flue connection of the
appliance (
3
).
Note:
The flue outlet on the top of the
boiler has a diameter of 100 mm. An
adaptor (Accy. No. 303 814) is
required to connect from the boiler
outlet to the 125 mm diameter flue
system. This adaptor incorporates a
condensate discharge connection
which allows any condensate or
water to drain away. It is important
that the condensate discharge
connector is connected correctly.
Note:
thermoCOMPACT 615 boilers do not
require a seperate restrictor ring and
are supplied without the restrictor. The
required restriction is designed into
the flue connection piece for these
boilers.
Fig. 1.10: Flue restrictor rings
thermoCOMPACT
615/2 E
thermoCOMPACT
620/2 E
thermoCOMPACT
624/2 E
turboMAX plus
824/2 E
turboMAX
pro 24/2 E
thermoCOMPACT
628/2 E
turboMAX plus
828/2 E
turboMAX pro
28/2 E
Use restrictor A
---
Use restrictor D
---
No flue restrictor
---
< 15.4 m
---
---
---
9.2-12.0 m
> 12.0 m
---
< 6.0 m
> 6.0 m
Use restrictor C
---
---
< 9.2 m
---
Total equivalent flue length
(incl. terminal any bends / elbows used)
