PLANNING THE AIR/FLUE DUCT LAYOUT
35
Flue restrictor rings
Two flue restrictor rings marked F0 to
F2 are packed with the boiler
connection accessories. The restrictor
rings 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.
Fig. 1.11: Flue restrictor rings
PA
RT
2 CONCENTRIC 80/125
thermoCOMPACT
637 E
turboMAX plus
837 E
aquaPLUS
Use restrictor F0
---
Use restrictor F2
---
No flue restrictor
---
< 5.5 m
8.5 - 10.5 m
> 10.5 m
< 5.5 m
8.5 - 10.5 m
> 10.5 m
< 5.5 m
8.5 - 10.5 m
> 10.5 m
Use restrictor F1
---
5.5 - 8.5 m
5.5 - 8.5 m
5.5 - 8.5 m
Total equivalent flue length
(incl. terminal any bends / elbows used)
