29
H.6.6
Primary air
The flame must burn uniformly and dark blue, never yellow or
orange; there should not be any signs of soot and the flames
must lie directly at the outlet openings.
If there is insufficient primary air, the flame flickers yellow; in
case of too much primary air supply, the flame is short and
transparent and stands out from the burner.
The primary air is correctly adjusted when the flame does not
float with the burner cold and there is no flareback with the
burner hot.
The flame withdraws into the burner when the gas/air mixture
comes out of the burner openings too slowly, this happens in
particular when the air ducts are not clean. In addition, the
flame must appear immediately, especially when the burner is
ignited and the flame spreads across the entire burner area.
If the flame does not light ad described above, the unit needs
cleaning and / or maintenance. Contact our Customer Service
Centre.
H.6.7
Primary air checking instructions
The following must only be carried out by authorised
technician:
1. Loosen nut
C
;
2. Remove the spoiler sheet
B
from the gas pipe holder
A
;
3. Replace the spoiler sheet
B
at distance
D
in accordance
with the nozzle table (spare parts catalogue);
4. Put the spoiler sheet
B
over the gas pipe holder
A
;
5. Tighten nut
C
.
H.7
Main burner nozzle replacement
1. Runscrew nozzle
A
and replace with a nozzle that suits
the gas type;
2. The nozzle diameter is specified in hundredths of a
millimetre on the nozzle body;
3. Screw back in nozzle
A
together with space holder
B
until
it stops;
H.8
Ignition burner nozzle replacement
1. Unscrew fitting
E
and replace nozzle
F
with the nozzle
suitable for the gas type;
2. The nozzle code is indicated on the nozzle body;
3. Screw fitting
E
back on.
H.9
Safety thermostat
When a predetermined safety temperature is exceeded, the
safety thermostat automatically activates and interrupts the
gas supply.
IMPORTANT
Only authorised technicians should reset the ther-
mostat. Any alteration to the safety thermostat shall
void the warranty.
You can access the thermostat as described in F.3
the appliance’s internal components
.
Wait until the appliance cools down and press the red button
on the safety thermostat.
I
OPERATING INSTRUCTIONS
I.1
Use
The appliance is intended for industrial use by trained
personnel.
This appliance must only be used for its expressly designed
purpose, i.e. for cooking food.
Any other use is considered improper.
IMPORTANT
Never use this appliance to heat crockery.
WARNING
Stand back when you open the
oven door or the steam outlet,
because hot steam could pour
out.
I.2
Features
1. Ignition control
A
D
B
C
A B
F
E
1
2
3
Содержание thermaline MBQI HCPO Series
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