Guide

1. Ensure the unit is shut off and cooled down.
2. Remove all knobs and the front apron panel from the unit.
3. Loosen screw on the air mixer which is located on the venturi
section of the burner.
4. Light the burner and set control for maximum “ON”.
Allow the burner to burn at least five minutes.
5. Open air mixer until flame starts to float fromt the main burner
ports.
6. Slowly close air mixer until the flame settles softly on the burner
ports. The flame should now be a well-defined blue with no
yellow tips.
7. Carefully tighten the screw and ensure the flame has not
changed.
8. Replace apron and knobs, proceed to “THERMOSTAT
CALIBRATION”.
THERMOSTAT CALIBRATION
NOTE: When Comstock-Castle griddles are equipped with a
Robertshaw thermostat, they are carefully calibrated at the
factory. If calibration is needed, it is recommended that ONLY a
qualified service techincian perform the adjustment.
BY-PASS ADJUSTMENT: (minimum burner flame)
When the cooking area reaches the temperature to which the
thermostat dial is set, the control will cut down the flow of gas
that is needed to keep is at the selected temperature. The control
must always by-pass enough gas to keep the entire burner lit.
The by-pass must always be carefully and accurately adjusted to
maintain the minimum flame.
NOTE: If the by-pass is in need of adjustment, it is recommended
the ONLY a qualified service technician perform the adjustment.
1. Light and adjust the pilot. Check and, if necessary, adjust the
manifold pressure.
2. Turn the dial completely “ON”, to light the burner.
3. Wait five minutes, turn and set the dial to a point slightly below
the first mark on the dial.
4. Carefully remove the dial and the bezel.
5. Locate the by-pass adjustment screw and monitor the burner
flame height. With a screwdriver, turn the by pass adjustment
screw counter-clockwise to increase the height of the flame and
clockwise to decrease the height of the flame. The adjustment
must maintain a minimum flame over the entire burner. The
minimum flame should be approximately 1/8” in height.
6. Replace the bezel and the dial, rotate the thermostat dial uniti it
locks in the “OFF” position.
8
STANDING & CHINA HAT PILOT ADJUSTMENT
PROCEDURE: (Fig. 5)
NOTE: Caution must be exercised during the initial installation
and/or conversion of standing or china hat pilots to ensure that
the pilot valves are not wide open.
1. The main gas valve should be “OFF” for at least five minutes to
allow any accumlated gas to escape the combustion chamber.
2. Gently remove the control knobs and the front apron panel to
the unit.
3. Remove spider rings, open top grates, and locate the pilots.
4. Follow the pilot feed tube back to the manifold and locate the
pilot adjustment valve.
5. With a small flat-tipped screwdriver adjust the valve to its
minimum position, (maximum clockwise)
6. Ensure that the thermostat or manually operated controls are in
the “OFF” position.
7. Turn on the gas. While holding a match close to the pilot head,
slowly open the pilot valve (counter-clockwise) until the pilot
head lights.
8. Properly adjust pilot flame for the correct height.
(See Fig. 5)
NOTE: A properly adjusted pilot will NOT cause pilot/burner
infringement, flame lift, or excessive carbon.
9. Properly adjust all the pilot valves. Ensure all pilots will easily
ignite each burner.
10. Replace the front apron panel and knobs.
11. Replace top grates, spider rings, and proceed with
“BURNER ADJUSTMENT”.
Figure 4 Figure 5
(Robertshaw 2C-1 (Pilot)
BURNER ADJUSTMENT:
(For oven, griddle, and open top burners)
NOTE: All Comstock-Castle appliances are equipped with fixed
orifices and the burners cannot be adjusted for gas flow. The
only adjustment necessary is the primary air adjustment. A
blue flame is necessary for proper combustion and maximum
efficiency. Check for proper operation after cleaning the unit. It is
recommended this adjustment be done at least once or twice a
year.