Stihl RE 661, Instruction Manual

Page: 45 / 220

RE 661, RE 661 PLUS, RE 961 PLUS
English
43
The tank may only be filled when the
heat exchanger is cold.
Fuel oil and diesel oil begin to congeal
due to the separation of paraffin at
temperatures near freezing point. This
can cause problems when starting the
burner.
To avoid such problems:
N
Add anti-congealant to the fuel as
directed by the manufacturer
Bio-diesel oil must comply with the
DIN 51606 standard.
Organic bio-diesel oil may cause the
burner to malfunction after prolonged
storage, in the presence of extreme
temperatures or if transported
incorrectly.
N
Open the cap (1)
N
Fill with fuel oil grade EL or diesel oil
as defined by DIN 51603. Organic
bio-diesel oil to DIN 51606 may also
be used.
Open shroud
N
Turn the screw (1)
counterclockwise until the shroud
can be swung upward
N
Pull the grip (2) in the direction of
the arrow to open the shroud
Open cover
Swing cover up only when the shroud is
open.
N
Turn the knob (1) counterclockwise
until the cover can be swung
upward
N
Pull the grip (2) in the direction of
the arrow to open the cover
Under normal operating conditions it is
not necessary to descale the machine if
STIHL scale inhibitor is used
consistently STIHL scale inhibitor is
specially designed for
STIHL detergents.
Mixing STIHL scale inhibitor with
water
N
Measure the water hardness or
contact your water supply company
to establish the water hardness
range
Depending on water hardness – see
table:
N
Mix scale inhibitor at a ratio of A : B
with clean water – maximum
capacity of the storage tank = 1 l
– A = scale inhibitor
– B = water
Fill fuel tank
Unsuitable fuels can be
dangerous.
Open shroud Add scale inhibitor
Unit water
hardness
Hardness
range
Mixing ratio
(A : B)
°dH < = 12 1 : 1
> 12 undiluted