Vulcan-Hart 126172, Service Manual

Page: 33 / 68

ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS
Page 33 of 68
4. To adjust the buzzer volume, turn the buzzer
volume adjustment screw until the desired
volume is obtained.
5. Once the buzzer frequency and volume are set
to the desired levels, press the START key to
save the setting and exit the configuration
mode.
CLEAN CYCLE MODE - STEAM
GENERATOR DELIMING
WARNING: THE OVEN AND ITS PARTS ARE
HOT. USE CARE WHEN OPERATING, CLEANING
OR SERVICING THE OVEN. THE COOKING
COMPARTMENT CONTAINS LIVE STEAM. STAY
CLEAR WHEN OPENING DOOR.
Steam generator deliming should be done on a
scheduled basis. The frequency depends on the
quality of the local water supply and whether or not
a water treatment system is used. Even with the use
of a water treatment system, periodic deliming of
the steam generator is still required.
On combi ovens using a water treatment system,
follow the instructions for that system to delime the
steam generator. Only use the type of chemical
recommended or described in the deliming
instructions for the system in use. If the Kleensteam
water treatment system is used, Scalekleen is the
recommended chemical.
If a water treatment system is not used, follow the
instructions for deliming the steam generator using
vinegar, as outlined in the steps below. See
“WATER CONDITIONING” under “GENERAL”.
1. Programmable oven control - Press the ON key
to turn the oven on and press the PROG key to
enter the programed cooking mode. Program
number “00" is displayed in the program
display. Press the down key once, to select the
clean cycle program or if at program 98 press
the up key once to select the clean cycle
program. Press and hold for automatic
scrolling. “CC” is displayed in the program
number display and “dSCL” is displayed in the
temperature display. Press the START/STOP
key to start the clean cycle and the start/stop
LED turns on.
Manual oven controls - Turn the oven on and
select the descale mode by rotating the
selector knob to dSCL. “dSCL” is displayed in
the temperature display and the clean cycle
starts automatically.
2. The steam generator begins a normal drain
cycle.
A. At the end of the drain cycle, oven beeps
for 10 seconds. On the programmable
oven control, the start/stop LED turns off.
B. “40" minutes is displayed in the time
display and “dSCL” is displayed in the
temperature display.
3. Add the deliming chemical.
A. If a water treatment system is installed in
the water line to the steam generator.
1) Turn the water supply off.
2) Press the relief valve at the top of the
feeder bowl head to relieve system
pressure.
3) Unscrew the feeder bowl (clear) from
the head and remove cartridge from
the bowl.
4) Remove the dip from its holding clip
and insert the dip tube (o-ring first) in
to the center port.
5) Add the appropriate amount of
deliming chemical to the feeder bowl
for the combi model and mix the
contents of the bowl with water. See
table below.
NOTE: Do not exceed the chemical
amounts listed in the table below or
provided with the deliming chemical for
the water treatment system in use.
6) Replace the feeder bowl.
7) Turn the water supply on.