Xylem EPR IM Electric heater-circulator unit EPR (obsolete) User Manual
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Instruction manual Laing Electric heater circulator unit
www.lainginc.com
Malfunction detector
The control recognizes the following malfunctions:
(the green LED always shines when the main switch is turned on and there
is a connection to the grid; the yellow LED shines when the control requests
heat and 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 run
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. Only one of the jumpers 1
to 4 must be closed.
Beside the indication of the malfunction through the LED’s on the upper side
of the control box, each function effects the closing of a relay which bridges
the contacts 10 and 11. This makes it possible to sound an alarm at each mal-
function of the Electric heater-circulator, or to activate other heating systems
or to inform an overriding control.
Electrical diagram to address a horn with the alarm output