Thermador PRD304GHU Installation Instruction

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English 13
Step 5: Gas Requirements and 
Hookup
Verify the type of gas being used at the installation site. 
The appliance is shipped from the factory for use with 
natural gas. It must be converted for use with propane. 
A qualified technician or installer must do the 
conversion. 
Make certain the range matches the type of 
gas available at this location.
For installation of the appliance at high altitude, please 
consult your local gas company for their recommendation 
of the correct orifice sizes and any other necessary 
adjustments that will provide proper gas combustion at 
specified altitudes.
The field conversion kit for this series of Dual Fuel Ranges 
is Thermador Model PALPKITHC. Obey all instructions in 
this kit for correct conversion of the gas regulator and 
settings for the gas valves.
CAUTION
When connecting unit to propane gas, make 
certain the propane gas tank is equipped with its 
own high pressure regulator in addition to the 
pressure regulator supplied with the appliance. 
The pressure of the gas supplied to the 
appliance regulator must not exceed 14" (34.9 
mb) water column.
WARNING
Gas line must not come in contact with any 
components inside back cover of range. 
Hook Up
A manual gas shut-off valve must be installed external to 
the appliance, in a location accessible from the front, for 
the purpose of shutting off the gas supply. The supply 
line must not interfere with the back of the unit. Make 
sure the gas supply is turned off at the manual shut-off 
valve before connecting the appliance.
The range is supplied with its own pressure regulator 
that has been permanently mounted within the range 
body.
Use 3/4" flex line to connect between the gas supply 
and the appliance gas inlet. The gas supply line 
connection is located at the lower right portion of all 
range models. (See Figure 8 and Figure 9). The 
appliance gas inlet connection is 1/2" NPT. Use caution 
to avoid crimping the 3/4" flex line when making bends. 
Suggested length of flex line is 48"; however, please 
check local codes for your area's requirements before 
installation.
The gas supply connections shall be made by a 
competent technician and in accordance with local 
codes or ordinances. In the absence of local codes, the 
installation must conform to the National Fuel Gas Code 
ANSI Z223.1/NFPA54- current issue.
Always use pipe sealing compound or Teflon® tape on 
the pipe threads, and be careful not to apply excessive 
pressure when tightening the fittings.
Leak testing of the appliance shall be in accordance with 
the following instructions.
Turn on gas and check supply line connections for 
leaks using a soap and water solution.
Bubbles forming indicate a gas leak. Repair all leaks 
immediately after finding them.
WARNING
Do not use a flame of any kind to check for 
gas leaks
.
CAUTION
The appliance must be isolated from the gas 
supply piping system by closing its individual 
manual shut-off valve during any pressure 
testing of the gas supply piping system at test 
pressures equal to or less than 1/2 psig (3.5 
kPa.).
The appliance and its individual shut off valve 
must be disconnected from the gas supply 
piping system during any pressure testing of the 
system at test pressures in excess of 1/2 psig 
(3.5 kPa.). When checking the manifold gas 
pressure, the inlet pressure to the regulator 
should be at least 6" W.C. (14.9 mb) for natural 
gas or 11" W.C. (27.4 mb) for propane.
Do not attempt any adjustment of the pressure 
regulator.
Natural Gas Requirements:
Inlet Connection:
1/2" NPT internal
(Minimum 3/4" dia. flex line) 
Supply Pressure:
6" min. to 14" max. water column
(14.9 to 34.9 mb)
Manifold Pressure:
5" water column (12.5 mb)
Propane Gas Requirements:
Inlet Connection:
1/2" NPT internal
(Minimum 3/4" dia. flex line) 
Supply Pressure:
11"min. to 14"max. water column 
(27.4 mb to 34.9 mb)
Manifold Pressure:
10" water column (24.9 mb)