Installation and maintenance instructions ecoTEC 0020029173_0114
Selection of the low loss header
The low loss header uncouples the boiler from the
heating system. A sufficiently large water volume is
constantly supplied through the boiler via the low loss
header in conjunction with the boiler pump. It acts as a
neutral point in the system and has minimal hydraulic
resistance, therefore the boiler pump does not affect
the circuit pumps and vice-versa.
A suitable WH type low loss header can be chosen from
Table 5.1.
Temperature difference of heating system
Output of heating
system
10 K 15 K 20 K
Stand-alone boiler WH 160 WH 95 WH 95
Two cascade
arrangement
WH 280 WH 160 WH 95
Three cascade
arrangement
WH 280 WH 280 WH 160
Table 5.1 Selection of the low loss header
No electrical accessories are required in order to use a
low loss header. Simple systems can be connected
directly inside the electronic box.
Model Article-
number
Connection
Sizes
1
Header
width
A
Header
depth
B
Total
height
C
Insulation
dimensions
To boiler
D
To heating
circuit
E
Height from
floor
F
Maximum
volume flow
m
3
/hr
WH 95 306721 2“ BSP (f) 155 155 750 155/155 470 540 n/a 8
WH 160 306726 DN65 520* 120 1350 220/220 900 900 300 12
WH 280 306725 DN80 600* 160 1390 260/260 930 930 300 21.5
Table 5.2 Low loss headers dimensions
All dimensions in mm
* = distance between flanges
5 Installation
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