Installation 5
0020134823_04 ecoTEC plus Installation and maintenance instructions
13
5.2.2
Installing an expansion vessel
1
▶
Install an expansion vessel on the connection
(1)
in the
return.
–
Connection to the pump group: 1/2
″
Conditions
: Using a system separation
–
Large expansion vessel:
≥
10 l
5.2.3
Hydraulic connection
Ø 1 1/4"
For the hydraulic connection to the heating installation, we
strongly recommend that you use a low loss header or a
plate heat exchanger for the hydraulic system partition. In
addition, we recommend that you install a dirt filter in the
system before the low loss header or the plate heat ex-
changer. For the maintenance of the plate heat exchanger,
we recommend that you install cleaning connections on
the heating side so that the plate heat exchanger can be
backwashed during maintenance work.
To this end, various plate heat exchangers and low loss
headers are available as accessories, depending on the out-
put of a product or the cascade system. The pressure loss is
adjusted to the pump groups that are offered as an access-
ory. The minimum volume of circulating water is guaranteed
in the unit circuit thanks to the original accessories, provided
the maximum pressure losses are not exceeded in the pip-
ing.
Select the plate heat exchanger according to output.
Depending on your choice of pump group, the following re-
maining feed heads are available in the unit supply:
Power
Description
Remaining feed
head
80 kW
Modulating pump
0.042 MPa
(0.420 bar)
100 kW
Modulating pump
0.026 MPa
(0.260 bar)
120 kW
Modulating pump
0.024 MPa
(0.240 bar)
If you are using a plate heat exchanger to hydraulically parti-
tion the system, the following pressure losses must be main-
tained (rated water volume when
Δ
T=20 K):
Power
Pressure loss
< 120 kW
86 mbar
(0.086 bar)
In conjunction with the hydraulic cascade
< 240 kW
96 mbar
(0.096 bar)
< 360 kW
76 mbar
(0.076 bar)
< 480 kW
82 mbar
(0.082 bar)
< 600 kW
87 mbar
(0.087 bar)
< 720 kW
92 mbar
(0.092 bar)
5.2.4
Connecting the condensate trap
Condensate forms in the product during combustion. The
condensate drain pipework routes the condensate to the
waste water connection.
The product is equipped with a condensate trap. The filling
height is 145 mm. The condensate trap collects any con-
densate that forms and feeds it into the condensate drain
pipework.
▶
Place the condensate trap on the underside of the
product on the condensate drain pipe and secure it using
the retaining clips.
▶
Leave installation space of at least 180 mm below the
condensate trap so that you can clean the condensate
trap in the event of maintenance work.
▶
Check the connection for leak-tightness.
