Xylem EPR IM Electric heater-circulator unit EPR (obsolete) - Manual (Page 31)

31
Instruction manual Laing Electric heater circulator unit
www.lainginc.com
to avoid a further overheating. However, it may not be possible to switch it
on again since the high temperatures may have destroyed the element. This
damage is recognizable when the knob of the switch for the safety temperature
limiter cannot be engaged any more. If this is the case, the safety temperature
limiter has to be replaced.
Important Notice: For proper connection to a floor heating system
All parts of the Electric heater-circulator and all other components which are
part of the Laing compact- or central stations, which come in contact with the
liquid conveyed are corrosion resistant. Therefore it is possible to provide
a direct floor heating system connection even if the pipes are not diffusion
protected.
However, this applies only when the whole floor heating loop consists of
corrosion resistant material. In any case installations having corroding mate-
rials such as iron expansion tanks, iron pipes or radiators should be avoided.
In such installations – even when they are diffusion protected – excessive
corrosion will occur in a short time on the iron parts which in turn can lead to
other damages and even water leaks in the system. In these systems only a
separation between the systems can solve the problem.
Factory settings
Constant temperature control 1°F
Safety temperature cutout 140°F
Jumper 1 closed
Jumper  open
Jumper 3 open
Jumper 4 open
Jumper 5 open
Jumper 6 closed
Jumper 7 closed
Jumper 8 closed