Electrical Connections - Spheros Thermo E 320 Einbauanweisungen

Thermo E 200/320
11

Electrical connections

ATTENTION!
High voltage, danger to life!
Before opening the heater, disconnect the connections at the
control device (circulating pump, temperature sensor and the
connection to the vehicle wiring harness).
11.1. Heater hook-up
The heater hook-up is to be accomplished according to the system
wiring diagram (Fig 18 or 19).
Before heater installation the ripple voltage level at the interface to the
heater shall be checked. It must not be higher than 2 Vss. Otherwise a
reduced service life of the electric and electronic components must be
expected.
Plug designs that differ from the standard versions are primarily possible
by using adapter cable harnesses. They are to be requested separately
from Spheros.
ATTENTION!
The usage of an adapter cable harness is only permitted, if the
heater is installed in an effective sealed installation box and
reliable protected against moisture and dirt.
The wire cross-sections are minimum requirements and to be selected
according to the following table:
Wire length <7.5 m Wire length 7.5 - 15 m
0.75 mm² 1.5 mm²
2.5 mm² 4.0 mm²
For the heater a blade-type fuse is to be used according to DIN 72581,
part 3. The power supply circuit of the heater (incl. circulating pump) is
to be protected by F1 = 25A. The main switch wire is to be protected
using a 5A fuse.
The required mating plug inclusive the required contacts and single wire
seals can be ordered at Spheros using the material number 11114920A.
Due to the crimp suitablity use FLR cable (sheathed cable with reduced
outer diameter).
ATTENTION!
– The water-proof electrical connection to the heater can only be
achieved with genuine plugs, contacts and single wire seals and
by using the prescribed crimp tools.
– Its absolutely essential to consider the specified cable cross-
section.
– The negative pole (terminal 31) and the positive pole (terminal
30) of the heater controller are to be directly connected to the
battery without battery switch.
– Route the electrical wires so their insulation cannot be
damaged (e.g. by jaming, thermal effects, bending, wearing
through). Particularly close to the heater the wire harness is to
be fixed to reduce the transfer of vehicle vibrations.
11.2. Hook-up of the control elements
The heater can be switched on and off by the Spheros control elements
switch or pre-selection timer. The control device is integrated in the
heater.
Electrical connections
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