7
FIGURE 10
CONVERSION OF HARPER-WYMAN APPLIANCE
PRESSURE REGULATOR
High Altitude Notice
The specified gas burner ratings typically apply to elevations up to 2000
feet. For higher altitudes, the rates may need to be reduced to achieve
satisfactory operation. A local certified gas servicer will be able to advise
if a reduction is necessary.
C. Low Flame Adjustment
(See figure 11)
This appliance is shipped from the factory with low and medium flame
settings adjusted for use with natural gas. If further adjustment is
necessary, or to readjust for use with LP, proceed as follows:
1. Light burner and set control know for low flame.
2. Remove control knob from valve stem.
CAUTION:
NEVER USE A METAL BLADE TO PRY KNOB OFF. IF
KNOB CANNOT BE EASILY REMOVED, TUCK THE FOLDS OF
A CLOTH DISHTOWEL UNDER THE KNOB AND PULL THE
TOWEL UPWARD WITH STEADY, EVEN PRESSURE.
3. Insert a slender, thin-blade screwdriver into the recess at center of
valve stem and engage blade with slot in adjusting screw.
4. Turn center stem adjusting screw to set flame size.
. . . clockwise to reduce
. . . counterclockwise to increase
5. Replace control knob when adjustment is completed.
Proper adjustment will produce a stable, steady blue flame of minimum
size. The final adjustment should be checked by turning knob from high to
low several times without extinguishing the flame.
This adjustment, at low setting, will automatically provide the proper flame
size at medium setting.
FIGURE 11
After Conversion Steps A, B and C have been completed, check the
appearance of each burner’s flame at the Hi and Lo settings against figure
12. If the flames appear too large or too small, review each step to make
sure it was completed correctly.
FIGURE 12
FLAME APPEARANCE AT HI AND LO
TO CONVERT APPLIANCE FOR USE WITH
NATURAL GAS
Electrical power and gas must be turned off prior to
conversion.
WARNING
If this appliance has been converted for use with LP gas, each of the
following modifications must be performed to convert the unit back to
natural gas.
A. Replace all orifice spuds
Perform Steps 1 through 4 on page 6.
For Step 5: Locate the colored brass natural gas orifice spuds that were
originally installed in this appliance before its conversion for use with LP
gas. Observe the color of each of the spuds and note the correct burner
location for each spud as shown in figure 13.
Complete Steps 6 through 9 on page 6 to complete the installation of
natural gas main spuds in their correct locations.
Save the orifices removed from the appliance for future use. They will
be needed if this appliance is again converted for use with LP gas.
B. Invert cap in appliance pressure regulator.
(See figures 9 and 10)
With the appliance installed the appliance regulator should be located
as shown in either figure 3 or figure 4 (pages 3 & 4). Identify the type of
appliance regulator and follow the instructions in the appropriate
illustration.
C. Adjust low flame as instructed on page 7 item C.
After Steps A, B and C have been completed, check the appearance of
each burner’s flame at the Hi and Lo settings against figure 12. If the
flames appear too large or too small, make sure all steps were
completed correctly.
