elco TRIGON XXL Series Planner Documentation

Hydraulic connection
Hydraulic connection into a system
Standard
Bypass
Hydraulic connection into a system
The TRIGON XXL must be connected
in such a way, that a minimum flow rate
of 50% of the nominal flow rate of SE
versions and 30% of the nominal flow
rate of ECO and EVO version can be
ensured at all times, independent from
the flow rate in the secundary system.
This can be achieved by using one of
the following 3 possibilities:
 Standard, with low loss header or
plate heat exchanger
 Bypass, with integrated minimum flow
rate by Bypass pump*
 Split System, with 2 return connec-
tions for best possible efficiency
(warm and cold return)*
* only applicable in single boiler instal-
lations
Standard
This is the most common way to
connect the boiler to the system. By
using a low loss header or plate heat
exchanger a minimum flow rate can be
ensured at all times, independent from
the flow rate in the secundary system.
The boiler pump is available as a speed
controlled version. The speed
controlled pump mudulates the flow
rate in the primary system in parallel
with the burner load. This ensures the
lowest possible return temperature to
the boiler for high efficiency usage.
Details of the available pump kits can
be found in the chapter „Accessories“.
Bypass
In single boiler installations, the TRI-
GON XXL can also be used without low
loss header or plate heat exchanger.
For this solution a bypass kit is availab-
le as accessory to the standard boiler.
The bypass is connected between the
flow connection and the second return
connection of the boiler.
The performance of the bypass pump is
very low when the system flow rate is
high. As soon as the system flow rate
decreases, the bypass pump perfor-
mance increases to ensure a minimum
flow rate through the boiler.
The bypass pump does not transport
the water from the boiler into the
system. The system pump should
overcome the boiler resistance at
nominal flow rate to transport the
from the boiler into the system and
vice versa.
Details of the available pump kits can
be found in the chapter „Accessories“.
Details to the 3 possibilities mentioned
above, can be found in the next sec-
tions.
Bypass
Standard
30

elco TRIGON XXL Series Specifications

General

Brand	elco
Model	TRIGON XXL Series
Category	Boiler
Language	English