Thermador PRD364NLGU, PRD48JDSGU User Manual
LP GAS CONVERSION and
HIGH ALTITUDE ADJUSTMENT
INSTRUCTIONS
For THERMADOR PROFESSIONAL® Pro Grand
Dual Fuel Ranges
INSTRUCTIONS DE CONVERSION
AU GPL et D’ADJUSTEMENT POUR
HAUTES ALTITUDES
Pour les cuisinières mixtes au gaz PROFESSIONALmc
Pro Grand de THERMADOR
Models/
Modèles/
Modelos:
PRD364JDGC
PRD364JDGU
PRD364NLGC
PRD364NLGU
PRD366JGC
PRD366JGU
PRD484NCGC
PRD484NCGU
PRD486NLGC
PRD486NLGU
PRD486JDGC
PRD486JDGU
PRD48JDSGC
PRD48JDSGU
PRD48NCSGC
PRD48NCSGU
PRD48NLSGC
PRD48NLSGU
PRD606RCG
PRD606REG
PRD606RCSG
PRD606RESG
INSTRUCCIONES DE CONVERSION
DE GAS LP y CONVERSIÓN PARA
GRANDES ALTITUDES
Para las estufas mixtas PROFESSIONAL® Pro Grand
de THERMADOR
Table of Contents
Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Important Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
LP Gas Conversion Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
LP Conversion Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Disassembling the Cooktop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
LP Regulator Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Replacing the Burner Orifices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Reassemble the Cooktop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
High Altitude Adjustment Instructions and Setting Valve Screws
for LP Converted Burners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setting Valve Screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Check for Gas Leaks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Checking manifold pressure (if necessary) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Check Flame Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Conversion Label Placement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Customer Support, Accessories & Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .back page
Install Scenarios
Scenario
Natural gas with High Altitude adjustment 7 – 10
Natural gas to LP Conversion 3 – 10
Natural gas to LP Conversion with High
Altitude adjustment
Complete
Pages
3 – 10
Safety Definitions
WARNING
This indicates that death or serious injuries may occur as
a result of non-observance of this warning.
CAUTION
This indicates that minor or moderate injuries may occur
as a result of non-observance of this warning.
NOTICE: This indicates that damage to the appliance or
property may occur as a result of non-compliance with this
advisory.
Note: This alerts you to important information and/or tips.
®
This THERMADOR
BSH Home Appliances Corporation
1901 Main Street, Suite 600
Irvine, CA. 92614
1-800-735-4328
www.thermador.com
We look forward to hearing from you!
Table of Contents English | 1 |
appliance is made by
Questions?
Safety
IMPORTANT SAFETY INSTRUCTIONS
READ AND SAVE THESE INSTRUCTIONS
The LP Conversion Kit is used to convert THERMADOR
PROFESSIONAL
natural gas to propane (LP) gas operation. This kit cannot
be used to convert older models of THERMADOR
PROFESSIONAL rangetops or ranges other than those
identified in these instructions (see applicable models on
the front cover). The LP Conversion Kit cannot be used to
convert all-gas ranges, oven burners, or any other brand of
appliance.
Save the natural gas parts for possible conversion from LP
back to the natural gas in the future.
IMPORTANT: Only a qualified service technician or
installer should make this conversion.
INSTALLER: Please leave these conversion instructions
with this unit for the owner.
OWNER: Please retain these instructions for future
reference.
CAUTION
Disconnect gas and electric power before making
conversion or adjustments. Before turning power ON,
be sure that all controls are in the OFF position.
WARNING
authority having jurisdiction. If the information in these
instructions is not followed exactly, a fire, explosion or
production of carbon monoxide may result causing
property damage, personal injury or loss of life. The
qualified service agency is responsible for the proper
installation of this kit. The installation is not proper and
complete until the operation of the converted appliance is
checked as specified in the manufacturer’s instructions
supplied with the kit.
®
PRO GRAND® dual fuel ranges, from
This conversion kit shall be installed by a
qualified service agency in accordance with
the manufacturer’s instructions and all
applicable codes and requirements of the
To the Service Agent:
It is important that you know the following BEFORE you
begin the gas conversion of the appliance.
• Verify the type of gas supplied to the location. Ensure
that the appliance is connected to the type of gas for
which it is certified.
• If the Dual Fuel range is to be converted for Propane
(LP) Gas, the appliance must first be converted for use
with Propane (LP) Gas before it can be converted for
use at high altitude. A Propane (LP) Conversion Kit is
available for purchase from Thermador Customer
Service. It is required that a qualified Professional
install the Propane (LP) Conversion Kit.
• You must plan for sufficient time and resources to
perform the LP conversion process properly and
completely before leaving the job site. Every step
described in these instructions must be performed to
safely convert the appliance for proper operation on
Propane Gas. INCOMPLETE OR INADEQUATE GAS
CONVERSION OF THE APPLIANCE CAN CREATE
A SAFETY HAZARD.
WARNING
State of California Proposition 65 Warnings:
This product contains chemicals known to the State of
California to cause cancer, birth defects or other
reproductive harm.
WARNING
If the Natural Gas orifices are left in place while
attempting to operate the appliance using Propane (LP)
Gas, at the higher pressure setting for LP Gas, the
burners will produce large flames which may emit high
levels of carbon monoxide into the room, or a fire or
explosion may occur.
WARNING
NEVER leave the gas conversion partially completed. If
the appliance is operated while the gas conversion is
incomplete, high levels of carbon monoxide may be
emitted, or a fire or explosion may occur.
Installation Instructions English | 2 |
LP Gas Conversion Instructions
Before You Begin
CAUTION
BEFORE PROCEEDING WITH THE CONVERSION,
SHUT OFF THE GAS SUPPLY TO THE APPLIANCE
PRIOR TO DISCONNECTING THE ELECTRICAL
POWER.
TOOLS NEEDED
Scissors
T-30 Torx screwdriver
T-20 Torx screwdriver
1/4" nut driver
7/8" socket or adjustable wrench
Flat-head screwdriver, 1/8" X.020" blade (included)
CAUTION
When connecting the unit to propane gas, make certain
the propane gas tank is equipped with its own high
pressure regulator. The maximum gas pressure to this
appliance is not to exceed 14.0 inches water column from
the propane gas tank regulator.
Disassembling the Cooktop
IMPORTANT: Ensure that the power is turned OFF at
the breaker and the gas supply is turned OFF.
1. Remove the cooktop grates.
2. Remove the burner caps.
3. From each burner base, remove the two burner base
screws with a T-30 Torx screwdriver.
4. To facilitate the removal of the spill trays remove the T20 Torx stainless screws in the front face of the
included Flush Island Trim.
LP Conversion Preparation
1. Shut off the gas supply to the appliance prior to
disconnecting the electrical power.
2. Cut a 3/8" long piece of the adhesive foam tape
(included). Place foam tape over the edge of the nut
driver used to replace the burner orifices, as shown.
The foam tape helps to retain
the orifice in the end of the nut
driver so it will not fall inside the
appliance during orifice removal
or installation.
Installation Instructions English | 3 |
5. Disconnect the igniter.
Burner Pedestal
A.) Disconnecting a Two Piece Igniter
1) Carefully pull up on the burner base.
Burner Base
Electrode
Ignitor Housing
Ignitor Wire
B.) Disconnecting a Single Piece Igniter
1) Carefully pull up on the burner base.
2) Disconnect the female terminal on the spark wire
from the male terminal on the electrode for each
burner.
IMPORTANT: The locking tab on the female
connector must be depressed to release from the
terminal on the electrode.
7. Carefully remove the burner pedestal and the venturi.
8. Remove the spill trays by rotating the trays up and out
the back.
9. Remove the heat shield, on some models. Some
models have a double-width shield that extends under
adjacent spill tray.
LP Regulator Conversion
The gas regulator is located in the cooktop, left side of
appliance. Exact location will vary per model.
Burner Base
Electrode
Ignitor Wire
6. From each burner pedestal, remove the burner
pedestal screws with a T-30 Torx screwdriver.
Burner Pedestal
Burner Pedestal
Venturi
1. Remove
conversion cap
with a 7/8" socket
or wrench.
2. Read the letters on the stem. You will see “NAT” at
the bottom of the stem. Snap-out the plunger from
bottom of the conversion cap. Flip the stem over to
the "LP" end, and snap the plunger back into the
cap, as shown.
NAT
LP
Installation Instructions English | 4 |
3. Re-install conversion cap, configured for LP gas, back
into top of the regulator.
Brass Cap
Sealing Washer
Orifice locations for 36'' models with 4 burners
Burner Orifice Size BTU Rate LP
Left front (XLO) 1.15 15,000
Left rear (XLO) 1.15 15,000
Right front (XLO) 1.25 18,000
Right rear (XLO) 1.15 15,000
Plunger
Regulator Body
Replace the Burner Orifices
1. Use a 7 mm or a 9/32'' socket with 1/4'' nut driver to
reach down through the jet holders and remove the
Natural Gas orifice from the burner’s jet holder.
Orifice locations for 36'' and 48'' models with 6 burners
Burner Orifice Size BTU Rate LP
Left front (XLO) 1.15 15,000
Left rear (XLO) 1.15 15,000
Center front 1.15 15,000
Center rear 1.15 15,000
Right front (XLO) 1.25 18,000
Right rear (XLO) 1.15 15,000
Orifice locations for 60'' models with 6 burners
Burner Orifice Size BTU Rate LP
Left front (XLO) 1.25 18,000
Left rear (XLO) #62 11,000
Center front 1.15 15,000
Center rear #62 11,000
Right front (XLO) 1.15 15,000
Right rear (XLO) #64 9,100
3. Install the orifices in their correct location according to
the tables above.
• All of the replacement orifices in the conversion kit
have straight threads (not pipe threads) and do not
require thread sealing compound.
4. Perform a gas leakage test of each orifice and
associated supply tube fittings. See “Check for Gas
2. Locate the proper LP surface burner orifices included
with the kit.
Orifices are stamped with the
orifice diameter size on the side.
Installation Instructions English | 5 |
Leaks” on page 8.
• Leak-checking should occur after the orifice
conversion is complete, and before the burner is
reassembled and tested.
Reassemble the Cooktop
1. For the single piece igniter, carefully feed the wires
through the heat shields, if applicable. Ensure that the
igniter wires do not crimp.
For the two piece igniter, reinstall the heat shield, if
applicable (wire feed not necessary).
2. For the single piece igniter, carefully feed the wires
through the spill trays. Ensure that the igniter wires do
not crimp.
For the two piece igniter, reinstall the spill trays (wire
feed not necessary).
3. Reinstall the Flush Island Trim with T-20 Torx screws.
4. For the single piece igniter, carefully feed the igniter
wires through the burner pedestals.
For the two piece igniter, reinstall the burner pedestals
(wire feed not necessary).
5. Insert the venturi into the burner pedestals. Secure with
the black T-30 Torx screws, starting both before fully
securing either screw. Ensure that the venturi does not
‘lock down’. The venturi should be pulled out smoothly
and easily once the pedestals have been secured.
6. For the single piece igniter, reconnect the igniter wire to
the electrode on the burner base. Carefully feed the
igniter wires back through their burner pedestals while
setting the burner bases back into place. Ensure that
the wires do not crimp or bunch.
For the two piece igniter, set the burner bases back on
the burner pedestals (wire feed not necessary).
7. Secure with the burner bases with T-30 Torx screws,
starting both before fully securing either screw.
8. Replace burner caps and grates.
Continue to “Setting Valve Screws” on
page 7.
Installation Instructions English | 6 |
High Altitude Adjustment Instructions and
By-pass screw access
hole with valve in OFF
position.
By-pass screw access
hole with valve in LOW
position.
Setting Valve Screws for LP Converted Burners
4. Remove the bezel-mounting
Dual Fuel ranges converted
for Propane (LP) Gas
For appliances that are to be converted to LP and must
also have a High Altitude Adjustment, the appliance must
first be converted for use with Propane (LP) Gas (service
number 00553182) before it can be converted for use at
high altitude. It is required that a qualified professional
install both the Propane (LP) Conversion Kit and make the
High Altitude Adjustment.
Setting Valve Screws
A flat-head screwdriver with
an 1/8" [3.0 mm] wide, .020"
[0.50 mm] thickness tip
(included) is used to
Valve Screw
Remove the protective cap before use.
1. SHUT OFF THE GAS SUPPLY TO THE APPLIANCE.
2. DISCONNECT THE ELECTRICAL POWER.
3. Remove knob from the valve stem by slowly pulling
knob straight out, away from the control panel.
reposition the valve screws
for minimum flow settings on
manual valves.
6. FOR STANDARD BURNERS, adjust the valve screw
by turning the valve screw clockwise about an
1/8 turn. Adjust the valve screw as little as required to
reach satisfactory simmer results. Due to normal
fluctuations in gas pressure, over-adjustment of valve
screw may affect flame stability.
7. FOR EXTRALOW BURNERS, auto-cycling of the
®
burners allows for exceptional simmer results
XLO
and adjustment is not required. However, adjustment
to the valve screw may be performed to suit individual
preference. Always turn OFF the power to the
appliance before adjusting flame settings. Turn the
valve stem to the LOW position for proper access to
the valve screws through clearance holes in the
potentiometers.
screw located to the right of
the valve stem, using a T-20
Torx driver.
5. To engage the valve screw,
insert the included
screwdriver with 1/8'' blade
into the hole in the bezel
created by removal of the
mounting screw. You should
feel the engagement of the
screwdriver and the valve
screw.
flat-blade
Installation Instructions English | 7 |
By-pass screw access
By-pass screw access
hole with valve in OFF
hole with valve in OFF
position.
position.
By-pass screw access
By-pass screw access
hole with valve in LOW
hole with valve in LOW
position.
position.
Check for Gas Leaks
WARNING
DO NOT use a flame of any kind to check for gas leaks.
Gas leakage checking using a liquid
solution
Checking Manifold Pressure
(if necessary)
Checking the appliance manifold pressure is NOT
REQUIRED for the Propane Gas conversion; however, if
the outlet pressure of the gas regulator or the inlet pressure
to the appliance is suspect, the following procedure can be
used to check the manifold pressure.
Leak-checking should occur after the orifice conversion is
complete, and before the burner is reassembled and
tested.
1. Make sure that all of the LP orifices have been
tightened and that all valves and controls are in the
OFF position.
2. Turn on electrical and gas supplies.
3. Spray a generous amount of soap and water mixture—
or other solution designed for checking gas leaks—on
the threaded junction at the base of the orifice. Avoid
spraying electrical devices. (A 25% dishwashing liquid
to water mixture is effective for this.)
4. Briefly turn on the valve or control while blocking the
orifice hole with a soft pencil eraser, your finger, or
something similar. It is normal to hear spark ignition
noise during this process.
5. Monitor the base of the orifice junction to see if bubbles
are forming anywhere around the threaded connection.
• Bubbles forming are indications of gas leaks. The
amount and sizes of the bubbles are indications of
the severity of the leakage.
6. Repair all gas leaks immediately after their discovery;
this can often be accomplished by re-tightening the
orifice.
7. Since considerable torque is sometimes used during
orifice replacement, leak-check other fitting junctions
leading up to the orifice as well.
8. Turn off the gas and electrical supplies.
9. Reassemble the appliance in preparation for testing
the newly-converted burner systems.
1. Attach a portable or
hand-held manometer,
that reads pressure in
inches water column
(WC), using a piece of
PVC or vinyl tubing.
2. Turn on the electrical and gas supplies to the
appliance.
3. Turn one of the cooktop burners to HI position. This is
important to acquire a true pressure reading under gas
flow conditions.
4. Turn the manual valve for the burner being monitored
to HI position. (Spark ignition noise will be heard
coming from this burner.)
• The manifold pressure reading on the manometer
should be between 9.50" and 10.50" WC for an
appliance regulator converted to LP gas. If the
manifold pressure reading is below this range,
verify that the regulator has been properly
converted for use with LP gas, and that the inlet
pressure to the appliance is between 11.0" and
14.0" WC.
Installation Instructions English | 8 |
Check Flame Characteristics
Star
®
Star
®
To observe the burner flames, it may be necessary to turn
off lights or close window blinds to darken the room for
easier viewing of the flame.
1. Test STAR® burner ignition. Push in the burner control
knob and turn it to HI. The igniter electrode and spark
module will produce a clicking sound. Once the air has
been purged from the supply lines, the burner should
light within four seconds.
• The flames should be stable, with no excessive
noise. The inner cones of the individual flames
should be defined and separate from each other.
Portions of the flame, along the burner, should not
exhibit excessive or continuous indications of
“lifting” or “lazy flame”.
NOTE: It is normal for slight yellow tipping of the flames to
appear after a few minutes of operation using Propane (LP)
Gas. Orange-colored streaks in the flame are produced
from burning airborne debris; this is normal during initial
start up and should dissipate within a few minutes of
operation.
Yellow Flames:
Further adjustment is required.
3. Test reignition of the XLO and observe the carry-over
of the small simmer flames as the XLO system cycles
the burners on and off.
• If the flame performance is not acceptable it may
be necessary to readjust the valve screw for a top
burner that does not have sufficient carry-over of
the flame. Turn the valve screw very slightly
counter-clockwise until carry-over of the flame is
acceptable. (See Setting Valve Screws for the
STAR Burners).
• If the burner flame is uneven, flutters, makes
excessive noise, or lifts, some of the slots in the
burner base may be blocked with food spillage or
other debris. Clogged slots can be cleared using a
straightened paper clip, needle, or similar object.
Hard-to-remove, encrusted food or debris can
sometimes be removed using a steel wool pad or
fine wire brush.
4. Burner flames that are “lazy”, with excessively-long
flames, can be created by an incorrectly fitted burner
cap—from which many of the outer mantles of the
individual flames will tend to “coalesce” or blend
together.
Verify that the burner cap is seated properly on its
burner base. The cap should fit reasonably flat when
correctly-positioned on the base and not rock
significantly.
Yellow Tips on Outer Cones:
Normal for LP Gas
Soft Blue Flames:
Normal for Natural Gas
2. Turn valve to SIM to see that the flame continues to
wrap around the burner. Blow out the flame, or use a
quick fan motion from a writing tablet or piece of
cardboard to extinguish the flame, and then observe
the burner’s ability to reignite and wrap around (also
called “carry-over”) the burner within several seconds.
This flame “carry-over” is essential for proper burner
ignition and reignition.
Correct burner cap Incorrect burner cap
5. Repeat the Ignition and Flame Test procedures for
each rangetop burner.
Installation Instructions English | 9 |
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