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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 (3.5kPa.).”
“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 (3.5kPa.).”
When checking the manifold gas pressure, the inlet pressure to the regulator should be at least
6.0" (14.9 mb) W.C. for natural gas or 11.0" (27.4 mb) for propane.
Do not attempt any adjustment of the pressure regulator.
STEP 5: GAS REQUIREMENTS AND HOOKUP
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"
(37mb) water column.
Verify the type of gas being used at the installation site.
As shipped from the factory, all units are configured for
use on natural gas. For use with propane gas, the unit
must be converted. Field conversion for use with propane
must only be done by qualified service personnel. Contact
the dealer where the unit was purchased or Thermador
(800/735-4328). The field conversion kit for all
Professional Gas (PRG series) ranges is Thermador Model
PROGASLPKIT. The field conversion kit for all Professional
Dual Fuel (PRDS series) ranges is Thermador Model
STARLPKIT.
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.
HOOK UP
• A manual gas shut-off valve must be installed
external to the appliance, in an accessible location
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 5/8" flex line to connect between the gas supply
and the appliance manifold pipe, which exits the
upper left rear of the appliance. The appliance
manifold pipe connection is 1/2" NPT. (See Fig. 3a,
3b, or 3c.) Use caution to avoid crimping the 5/8" flex
line when making bends.
• The gas supply connections should be made by a
competent technician and in accordance with local
codes or ordinances. In the absence of a local code,
the installation must conform to the National Fuel
Gas Code ANSI Z223.1, Current Issue.
• Always use pipe dope or Teflon® tape on the pipe
threads, and be careful not to apply excessive pres-
sure when tightening the fittings.
• Turn on gas and check supply line connections for
leaks using a soap solution. Do not use a flame of
any sort to check for leaks.
Natural Gas Requirements:
Inlet Connection: 1/2" N.P.T. (Minimum 5/8" dia.
flex line.)
Supply Pressure: 6" to 14" water column. (14.9 to
37 mb)
Manifold Pressure: 5" water column (12.5 mb)
Propane Gas Requirements:
Inlet Connection: 1/2" N.P.T. (Minimum 5/8" dia.
flex line.)
Supply Pressure: 11" to 14" water column. (27.4
mb to 37 mb)
Manifold Pressure: 10" water column (24.9 mb)
For Massachusetts Installations:
1. Shut-off valve must be a “T” handle gas
cock.
2. Flexible gas connector must not be
longer than 36 inches.
3. Not approved for installation in a bed-
room or a bathroom unless unit is
direct vent.
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