25
OVEN THERMOSTAT - 124 SERIES
The Model BJ Robertshaw is a combination
thermostat and gas valve. The gas is turned on
and the temperature setting made by a single
rotation of the dial. This valve automatically
locks itself in the OFF position. To use, push
inward, rotate counterclockwise to the desired
temperature. To shut gas off, rotate clockwise to
OFF position.
This thermostat is a precision instrument
carefully made and properly calibrated (i.e. the
dial is properly set) at the factory to control
temperatures accurately. The calibration should
be verified upon installation of the equipment
and periodically checked during preventative
maintenance. The calibration of this thermostat
should not be changed until considerable
experience with cooking or test results have
definitely proved that the thermostat is not
maintaining the proper temperature.
CAUTION
THE RECALIBRATION SHOULD NOT BE
MADE UNTIL THE BYPASS (MINIMUM
BURNER) FLAME HAS BEEN PROPERLY
ADJUSTED.
ADJUSTMENT OF BYPASS
(MINIMUM BURNER) FLAME - 124 SERIES
This is the flame that must be maintained on the
burner when the oven has come up to the
temperature set on the dial. Enough gas must
be bypassed by the control to keep the entire
burner lit. The thermostat regulates the flame
from high to low in accordance with the oven
temperature and will automatically turn down to
this bypass flame when temperature set on the
dial is attained in the oven.
1
2
3
4
5
6
7
8
9
1. Bypass Adjustor
2. Calibration Stem
3. Retainer Temperature Marks
4. Mounting Flange
5. Mounting Flange Gasket
6. Dial Assembly
7. Dial Insert
8. Dial Stem (Four Notches)
9. Bypass Setting
Figure 15. 124 Oven Thermostat
Components
THE BYPASS MUST BE SET CAREFULLY
AND ACCURATELLY AS FOLLOWS:
1. Light burners and turn Dial (6) counterclock-
wise and to a point midway between the
―Gas On‖ mark and next graduation to the
right of it (shown by #9). If the burner goes
out entirely, the bypass is closed.
2. Slip off Dial (6). Remove valve panel from
front of range.
3. With a screwdriver, turn Bypass Adjustor (1).
Turning it out counterclockwise increases the
bypass flame; turning it in clockwise decreas-
es the bypass flame. Adjust until there is a
flame approximately 1/8‖ high over the entire
burner.
4. Replace dial, rotating dial clockwise until it
snaps into its original position.
5. Reinstall valve panel on front of range.
