25
Connection of Multiple Collectors
It is only recommended to connect up to
150 tubes in series (i.e. 5 x AP-30 Collectors
with a maximum flow rate of 15 l/min
through any Apricus Collector.
✖
Damage to collectors due to heat
expansion and copper header distortion is
not eligible for warranty claims.
Balancing Flow through Collectors
When connecting multiple banks of
collectors (a bank being 1-5 x 30 tube
collectors in series) in parallel, the flow rate
through each bank MUST be equal.
Otherwise, some collectors will run cold, due
to higher flow rate while others will run hot,
due to lack of flow. This is not an issue for a
single bank of up to 150 tubes connected in
series.
Reverse Return plumbing, or “first in - last
out”, is an effective piping configuration that
helps to ensure balanced flow. However,
there are affordable, high quality flow setters
or circuit setters available and they are often
a better choice, as they minimize pipe run
length, costs and heat loss. Below is a
diagram of reverse return piping.
