Ferroli BlueHelix HiTech RRT C Instructions For Use, Installation & Maintenance page 30

Condensate drain
If possible, the condensate should be conveyed inside an underground drainage system or pipe. For that purpose, use
a pipe of at least 22 mm diameter and a trap with flexible connection preinstalled in the unit to facilitate connection of
the condensate drain pipe.
The pipe must be in glue-joined plastic and not in copper, since the condensate has a pH of 4 (slightly acid).
If the condensate drain pipe cannot be ended on the inside, it is advisable to run it outside as shown in the following
figure.
The pipe sections going to the outside are exposed to the risk of freezing in particularly rigid weather conditions. To
prevent this from occurring, it is advisable to reduce the length of the condensate drain pipes and run them on the inside,
as much as possible, before going to the outside.
The pipes outside the building must be in glue-joined plastic with increased diameter of up to 32 or 40 mm and at least
3 m long for connection to a condensate collection pit or external drain.
If using a condensate collection pit, it must be as indicated in the figure below, or use a specific system (such as Mc
Alpine SOAK1GR) available from the majority of suppliers of products and accessories for plumbing or heating systems.
Internal
30
External
32/40mm Solvent weld pipework 2.5 * Minimum Fall see below
Cement seal
25mm
100mm Dia tube
Lime stone chippings
Hole depth 400mm
fig. 40 - Condensate drain
cod. 3541V691 - Rev. 00 - 04/2022
BlueHelix HiTech RRT C
-300mm
Bottom sealed
Ground level (either/Or)
2 Rows of
3x12 mm Holes
EN