Xylem EPR IM Electric heater-circulator unit EPR (obsolete) - Manual (Page 32)

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Instruction manual Laing Electric heater circulator unit
www.lainginc.com
Switching sequence Jumper 1 2 3 4
A Simultaneous switching closed open open open
B Switching in temperature steps open closed open open
C Switching staged over time open open closed open
D Switching depending on a gradient open open open closed
In connection with an outside temperature guided control only A and C can
be used.
Jumper Function jumper closed Function jumper open
5 After switching off the heating Circulator runs always as long
elements the circulator runs as the main switch is turned on
another two minutes
6 Second heating element Second heating element
activated deactivated
7 Third heating element Third heating element
activated deactivated
8 Overheating safety switch Safety temperature switch not
activated activated
Malfunction reports and LED’s
(the green LED is always on when the main switch is turned on and there is
a connection to the grid, the yellow LED is on when the control requests heat
and when the heating elements are activated.)
Malfunction Signal red LED yellow LED
Circulator malfunction blinking on
Excess temperature cutout on on
Safety temperature limiter blinking off
Dry operation on off
Jumper 1 to 4 wrong position blinking blinking
The malfunction signal “Jumper 1 to 4 wrong position” means that more than
one jumper is closed or all four jumpers are open. From the jumpers 1 to 4
only one jumper must be closed.