Xylem EPR IM Electric heater-circulator unit EPR (obsolete) - Manual (Page 4)

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Instruction manual Laing Electric heater circulator unit
www.lainginc.com
Applications
Electric heater circulator units Model EPR can be applied in all cases where
electric heating has to be installed in a small space to heat an apartment or
a single or multiple family house.
This applies to direct electrical heating as well as for electrical heating with
a heat storage.
A further application exists in connection with room additions where the
electric heating can supplement the existing hydronic heating.
The Electric heater-circulator is also very well suited to heat domestic
hot water. The application for heating of domestic hot water is described in
“Indirect domestic hot water heating - Application”.
Design of the EPR model
The Electric heater circulator model EPR consists of a circulator pump, an
electric heater with three heating elements and an electronic microprocessor
control.
The spherical motor circulator
operates almost noiselessly and stays
quiet over its lifetime.
The arrangement of the pump be-
low the heating elements guarantees
good heat conductivity from the hea-
ting elements since the swirl created
by the impeller extends over the length
of the heating elements. This avoids
overheating of the heating element
surfaces.
The water for the heating loop is drawn
in by the circulator, conveyed along
the heating elements and discharged
through the discharge port at the
upper part of the housing. The inlet
has an additional 3/8” port, to which
an expansion tank can be connected.
An automatic air vent and a pressure
relief valve communicate with the
outlet port.
Mounting eyelets are included in
the castings of the unit.