Bi-Metal Gas Valve Removal And Replacement - Under Maintop - Thermador PRL304EG Service Manual

Service Manual for Thermador Pro Grand LP Gas Ranges, Models: PRL304EG, PRL364EDG, PRL364ELG, PRL366EG, PRL484ECG, PRL486EDG, PRL486EDPG, PRL484ELG
1. Follow all safety precautions and steps in Preparing the Range for
Servicing, page 21.
2. Follow all steps in Accessing Components under the Maintop,
page 21.
3. If obstructing access to the regulator, remove the burner support
rail (with jet holder assemblies attached) by following the steps in
Removing the Burner Support Rail, page 24.
4. Use two wrenches (open-end, or adjustable) and hold the large
nut on the regulator steady with one wrench, while you
simultaneously rotate the flared adapter with the other wrench –
until you can remove the flared adapter from the regulator (see
Figure 105).
5. Use a wrench to hold the connecting pipe, while you
simultaneously rotate the regulator until you can detach it
(see Figure 105).
6. Replace the regulator if needed.
NOTE: When replacing the regulator or associated fittings, use
pipe sealant on pipe threads only - such as the manifold pipe to
T-connector, T-connector to connecting pipe, connecting pipe to
regulator, and regulator to flared adapter (threaded end only).
Never use pipe sealant on flair connections or pressure fittings, such
as the flared end of the flared adapter.
7. When replacing the regulator, make sure it is positioned correctly
with its cap fitting facing upward, as shown in Figure 105.
Gas Leaks
With electrical power off, carefully check for gas leaks at each gas
component that was removed, replaced, or otherwise serviced using a
gas leak detector or bubble test.
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4.5.15 Bi-Metal Gas Valve Removal and Replacement – Under
Maintop
There is an individual bi-metal gas valve for each broil burner.
For 30-inch and 36-inch ranges, the bi-metal gas valves are located
under the maintop, and accessible from the top of the range. For
48-inch ranges, the bi-metal gas valves are located at the back of the
range (see Bi-Metal Gas Valve Removal and Replacement – Back of
Range, page 83).
Be sure to check QuickFinder for relevant information, documentation,
and the correct part number when replacing this component.
Figure 106: Typical Bi-Metal Gas Valves – Under Maintop
1. Follow all safety precautions and steps in Preparing the Range for
Servicing, page 21.
2. Follow all steps in Accessing Components under the Maintop,
page 21.
3. If obstructing access to the bi-metal gas valve, remove the burner
support rail (with jet holder assemblies attached) by following the
steps in the Removing the Burner Support Rail procedure,
page 24.
4. Disconnect the two spade connectors from the bi-metal gas valve,
and make a note of which wires are connected to each of the two
different terminals (see Figure 107).
NOTE: It is always recommended to label and tag all wires, wire
connectors, and harnesses prior to disconnecting them, so as to
correctly identify their connections/locations when re-assembling.
Alternatively, you can photograph the wire connections prior to
disconnecting (for example, with your mobile phone).
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