WRDB - GB
Adjustments
13
5 Adjustments
5.1 Heater adjustment
Natural gas
Heaters for natural gas (G 20) are supplied sealed from
the factory after being adjusted to the values indicated
on the rating plate.
Liquefied gas
Heaters for propane/butane (G31/G30) are supplied
sealed from the factory after being adjusted to the val-
ues indicated on the rating plate.
It is possible to adjust the power using the burner pres-
sure process, although a manometer is necessary for
this procedure.
5.2 Pressure adjustment
Accessing the adjusting screw
B Remove the front part of the heater (see 3.3).
Connecting the manometer
B Unscrew the shut-off screws (Fig. 14).
B Connect the manometer to the burner pressure mea-
suring point.
Fig. 14 Pressure measurement point
Maximum gas flow adjustment
B Remove the seal from the adjusting screw (Fig. 15).
B Turn on the heater with the power selector set to the
left (maximum position).
Fig. 15 Maximum gas flow adjusting screw
B Open various hot water taps.
B Using the adjusting screw (Fig. 15), regulate the
pressure until achieving the values indicated in the
table 6.
B Seal the adjusting screw once again.
Minimum gas flow adjustment
5.3 Conversion to a different type of
gas
Only use the original conversion kits.
The conversion must only be performed by a qualified
technician. The original conversion kits are supplied
with assembly instructions.
* Sealed elements must not be opened.
Heaters must not be turned on if the con-
nection pressure is lower than 15 mbar or
higher than 25 mbar.
Danger: The following procedures
must only be performed by a qualified
technician.
The minimum gas flow adjustment is per-
formed automatically after the adjustment
of the maximum gas flow.
Natural gas H Butane Propane
Injector code
WR11
8708202113
(1,10)
8708202130
(0,70)
8708202124
(1,20)
8708202128
(0,72)
WR14
8708202113
(1,10)
8708202128
(0,72)
8708202116
(1,25)
8708202132
(0,75)
WR18
8708202115
(1,15)
8708202130
(0,70)
8708202116
(1,25)
8708202132
(0,75)
Connection
pressure
(mbar)
WR11
WR14
WR18
20 30 37
MAX (mbar)
WR11 12,7 28 35
WR14 12 28 35
WR18 10,3 25,5 32,5
Tab. 6 Burner pressure
To Next Page
Loading...
Need help?
General
