Installation and Service Manual Epsilon-Series
11
If the installation resistance is higher than the stated value the pump will rotate at
maximum pump capacity and the load will be adjusted until an acceptable temperature
difference between flow and return water has been obtained. If, after this, the temperature
difference remains to much then the boiler will switch itself off and wait until an acceptable
temperature has arisen.
If an unacceptable temperature is detected, then the control will repeatedly try to achieve
water flow, and if this does not work then the boiler will switch off.
If the capacity of the boiler pump is insufficient, an extra external pump can be installed
in combination with a low velocity header in series with the boiler. The electrical side of
this external circulation pump can be connected in the Control Tower, by which means
this pump switches at the same times as the boiler pump.
The maximum absorbed current consumption of the external circulation pump may be
230 W (1 Amp). The extra external pump must be selected according the installation
resistance and required flow.
pump index lines
graph 6.1.a
As standard the boiler is provided with a water filter in the return pipe of the boiler. With
this, possible contamination of the central heating water is prevented from ending up in
the boiler. The boiler is also provided with an internal safety valve set at 3 bar. This is
connected to the waste discharge together with the condensation discharge.
If all, or a large part of the radiators are provided with thermostatic radiator valves it is
advisable to use a pressure difference control (bypass) in order to prevent flow problems
in the installation.
The boiler is designed to be used on sealed system only.
Additives in the installation water are only permitted in consultation with the
country distributor.
external installation pump with low
velocity header
figure 6.1.a
Q(m³/h)
EB 40
H(m)
