NGW 300 / LGW 300 / GBW 300
8 Servicing work
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8
Servicing work
8.1
General information
This section describes the workwhich is permitted to be
performed on heaters when they are installed.
Work may only be performed on the heaters by staff who
have been trained by Spheros.
Work on the gas supply line and and on the gas pressure
regulator may only be performed by staff who are officially
entitled to do so.
Heaters must be protected against being wwitched on
unintentionally.
8.2
Working on heaters
The main battery supply must not be interrupted due to
the danger of the heater’s overheating and a related
activation of overheatingprotection, if the heater is in
operation or in the after-run.
When comprehensive repair work is being carried out on
the heater,it is advisable to dismantle it.
After work has been carried out on the heat circuit, a
coolant mixture of waterand antifreeze must be
replenished in accordance with the vehicle
manufacturer’s instructions and the heating circuit must
be ventilated.
8.3
Working on the vehicle
ATTENTION
In the area of the heater,a temperature of 100 °C must
never be exceeded (e.g. when painting the vehicle).
8.4
A trial run of the heater
The heater may not be operated in enclosed spaces such
as garages or workshops without an extraction system
and may not be operated with time preselection.
8.5
Maintenance work
To ensure that the heater functions safely, the following
maintenance work must be carried out:
–
The opening of the combustion air intake grille and the
exhaust opening must be checked for dirt
accumulation and must be cleaned.
–
Outside of the heating season, the heater should be
operated when the vehicle’s engine is cold, approx.
every 4 weeks for
2
0 minutes, set at "warm" and
using the slowest fan level. In that way, starting
problems at the beginning of the heating season will
be avoided.
–
Every three months accumulated oil and condensate
must be drained in accordance with 6.3.8.5 at the gas
pressure regulator’s oil drain plug.
PLEASE NOTE
If no oil/condensate accumulation is visible, the draining
interval can be lengthened.
However, for purposes of verification, the draining
procedure must be carried out at least once annually.
–
The gas presure regulator must be replaced every 4
years for safety reasons (ageing of the seals).
ATTENTION
If solid particulate matter is found in the oil/condensate,
the gas pressure regulator must be replaced.
–
When renewing the coolant for the vehicle’s engine,
care must be taken to bleed the the heater, after the
vehcle’s cooling system has been bled. Turn on the
circulating pump (if there is a separate switch) or turn
on the heater for approx. 5 seconds and operate the
circulating pump in the after-run. This procedure may
have to be repeated. Insufficient coolant must be
replenished in accordance with the manufacturer’s
instructions.
PLEASE NOTE
The U 4851 and Aquavent 6000 S circulating pumps have
a dry running protection which deactivates the motor in a
dry run after approx.10 seconds in operating mode or
approx. 15 seconds after being switched on. The
Aquavent 6000 S shuts down only after 45 minutes,
when it is in a dry run.
The system is reactivated by disconnecting it from the
power supply for approx. 2 minutes.
–
At the beginning of the heating season, at the latest,
the heater and the gas pressure egulator must be
tested by a professional.
