GEL DOSAMATIC PP Installation, Use And Maintenance Manual page 70

IMPORTANT:
To avoid damaging the pump, never connect the pump in parallel to inductive loads (e.g.
engines, etc.), but use a "relay". See figure below.
A
I
E
P
- Notice: for pumps with power supply 115 or 230 VAC do not use "overload cutout" protections. Always
check peak absorption.
- The motherboard of the pump is fitted with a further protection against overvoltage (275V - 150V) and
against distribution noises of 4 KV for a duration of 50 µsec.
ELECTRICAL PROTECTIONS
In addition to the anti-jamming system, the circuit is also protected by a fuse. To change the fuse take off
the transparent front cover.
LEVEL ALARM (PROBE)
All models are fitted with a level alarm for product
exhaustion. The level probe of the pump must be
connected to the special BNC connector placed
in the right bottom of the pump. It is made up
of N.O. reed contact (10 VA, 1 A max, 230 Vac
max) moved by a magnet placed inside a float
in plastic material (PVDF). When the product is
below the minimum level, indicated by the position
of the level probe, the float goes down and the
contact changes from N.O. (open contact) to N.C.
(closed contact). The pump stops and the alarm is
indicated by a red led on.
70
A
R
E
P - Metering pump
R - Relay
I
I - Switch or safety device
E - Solenoid valve or inductive load
A - Power supply
P
External signal
Ingresso segnale
input
esterno
Level probe
Ingresso sonda
input
di livello