Xylem EPR IM Electric heater-circulator unit EPR (obsolete) - Manual (Page 16)

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Instruction manual Laing Electric heater circulator unit
www.lainginc.com
control entrance should be used (terminals 5 and 6).
To operate the second heating element by remote control, the heating
element has to be deactivated first by opening jumper 6. The same applies
to the third heating element. In this case jumper 7 has to be opened. Now a
non energized switch can be attached to terminal 1 and . Closing this switch
will activate the deactivated heating elements.
Control input
When the Electric heater circulator unit should be controlled by a remote control
unit, this control must be connected to terminals 5 and 8 with a potential free
switch. If two remote controls are to operate in series, one can be connected
to terminals 5 and 6, the other one to terminals 7 and 8. The terminals 6 and
7 are connected internally. For this function, the bridge between terminals 5
and 8 has to be removed. All active heating elements will be switched on and
off by this input in accordance with the selected switching sequence.
The constant temperature control function stays always active. This means
that the set constant temperature must be set at or above the maximum
temperature called for by the remote control (see also “Outside temperature
guided control”)
Room temperature guided control
In connection with a room thermostat RT or a room thermostat with timer RTU,
it is possible to control the Electric heater circulator unit from one room of the
house. In this case, the room thermostat or the thermostat with timer must be
connected to the control input of the Electric heater circulator unit. The room
thermostat or the thermostat with timer should be located in the main room
since it will control the entire heating system.
The thermostat should not be located close to windows, radiators, outside
walls or similar distorting influences.
The thermostat should be connected according to the electrical diagram
provided with it.