Econoflame R2700/R2800/R2900 boilers - CMS

the use of a signal amplifier is recommended.
41 - 42 SCOM bus connection (use the correct polarity).
43 - 44 Primary boiler pump control (0 – 10 V = +2 °C – +90
°C). (Not available for R2700 series boilers).
* the use of screened cables is recommended.
5.3.3 Water connections The appliance must be installed by a recognised installer in
accordance with the applicable national and local specifications
and regulations (see Supplement). The flow and return connections
are made at the rear of the unit.
Supports for water connections
It is recommended that the flow and return pipes be properly
supported. This will avoid damage through overloading (weight)
and simplifies maintenance.
Fig. 17 Support
The unit is a constant water flow appliance and is suitable for
use in both open vented (non-pressurised) systems and sealed
(pressurised) systems provided the minimum pressure requirements,
as per table 14, are met. The unit is fitted with a boiler
pump as standard and which guarantees the required water
circulation through the boiler. The capacity and working head of
the pump is sufficient to overcome both the resistance of the
boiler and some resistance offered by the system.
The boiler pump is however not a system pump
If the resistance of the system exceeds the available working
head, the boiler will be shut down by the flow switch. In order to
prevent this happening, the length and diameter of the primary
pipework between the boiler and the low velocity header must
be chosen such that the remaining working head of the pump
(see table 12) will not be exceeded.
2789CV02C 25