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Page 32 / 146 00BNO9061-J
VARMAX - Installation, Use and Maintenance
4.10.5. Connection to a C53 air vent
Type C53 connection:
Air inlet and gas extraction via 2 separate ducts.
!
IMPORTANT:
Connecting a VARMAX boiler in a C53 con guration requires the use of
accessory kits.
The table below gives the reference of the available kits depending on the
boiler model and the maximum straight lengths authorised for the air and
ue-gas ducts.
MODELS
120 140 180 225 275 320 390 450
Accessory kit reference 041422 041422 041423 041424
L1 (air) 10 lm 8 lm 10 lm 10 lm
L2 ( ue-gas) 40 lm 39 lm 40 lm 40 lm
ø A (air duct)
150 mm 150 mm 180 mm 180 mm
ø F ( ue-gas duct)
160 mm 160 mm 180 mm 200 mm
The lengths given include the lengths of the ue-gas terminal but do not
include the air terminal (measure taken on the outside of the wall).
In addition, in the duct length calculation, the following equivalences must
be used;
For ducts with diameters 150 mm and 160 mm:
- 90° elbow = 1.5 m of straight duct
- 45° elbow = 0.8 m of straight duct
For ducts with diameters 180 mm and 200 mm:
- 90° elbow = 2 m of straight duct
- 45° elbow = 1.1 m of straight duct
In addition, in the duct length calculation, the following equivalences must
be used;
- 90° elbow = 1.5 m of straight duct
- 45° elbow = 0.8 m of straight duct
The terminal's installation must comply with the rules in § 4.10.3, page 30.
To facilitate mounting of ue-gas ducts (PPTL), coat the joints with liquid
soap or a suitable grease (provided in the "terminal kit").
!
IMPORTANT:
The weight of the ducts (air and ue-gas) must not be supported by
the boiler's connecting parts.
32


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