Thermador PRD304GHU Installation Instruction

English 3

high heat capability of this unit, particular attention should 
be paid to the hood and duct work installation to assure it 
meets local building codes.

Check local building codes for the proper method of 
appliance installation. Local codes vary. Installation, 
electrical connections and grounding must comply with all 
applicable codes. In the absence of local codes the 
appliance should be installed in accordance with the 
National Fuel Gas Code ANSI Z223.1/NFPA 54 current 
issue and National Electrical Code ANSI/NFPA 70-current 
issue. In Canada, installation must be in accordance with 
the CAN 1-B149.1 and .2 – Installation Codes for Gas 
Burning Appliances and/or local codes.

Gas Supply:
Natural Gas — 6 inch water column. (14.9 mb) min., 14 
inch (34.9 mb) maximum

Propane Gas — 11 inch water column. (27.4 mb) min., 14 
inch (34.9 mb) maximum

Electric Power Supply:
(See page 14 for specifications.)

When connecting the 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 range. The 
maximum gas pressure to this appliance 
must not exceed 14.0 inches water column 
(34.9 mb) from the propane gas tank to the 
pressure regulator.

This unit is designed as a cooking appliance. 
Based on safety considerations, never use it for 
warming or heating a room.

This appliance complies with one or more of the following 
standards:
•

UL 858, Standard for the Safety of Household Electric 
Ranges

•

UL 923, Standard for the Safety of Microwave Cooking 
Appliances

•

UL 507, Standard for the Safety of Electric Fans

•

ANSI Z21.1, American National Standard for 
Household Cooking Gas Appliances

•

CAN/CSA-C22.2 No. 113-M1984 Fans and Ventilators 

•

CAN/CSA-C22.2 No. 61-M89 Household Cooking 
Ranges

It is the responsibility of the owner and the installer to 
determine if additional requirements and/or standards 
apply to specific installations.

Due to the high heat of the cooktop burners, installing a 
microwave oven with a ventilation system over the cooktop 
is not recommended.

To eliminate risk of burns or fire caused by 
reaching over heated surface units, cabinet 
storage located above the surface units should 
be avoided.

It is strongly recommended that a suitable exhaust hood be 
installed above the range. Downdraft ventilation should not 
be used. The Table on page 4 indicates the ventilation 
hood options and blower capacity guidelines that are 
recommended for use with all Thermador ranges.

1. Select Hood and Blower Models:
•

For wall installations, the hood width must, at a 
minimum, equal the width of the range cooking surface. 
Where space permits, a hood larger in width than the 
cooking surface may be desirable for improved 
ventilation performance.

•

For island installations, the hood width should 
overhang the range cooking surface by a minimum of 
3" on each side.

Ventilation hoods and blowers are designed for use with 
single wall ducting. However, some local building codes or 
inspectors may require double wall ducting. Consult local 
building codes and/or local agencies, before starting, to 
assure that hood and duct installation will meet local 
requirements.

Do not install a microwave oven/ventilator combination 
above the range, as these type of units do not provide the 
proper ventilation and are not suitable for use with the 
range.

2. Hood Placement:
•

For best smoke elimination, the lower edge of the hood 
should be installed 30" above the range cooking 
surface. (See Figure 1).

•

If the hood contains any combustible materials (i.e. a 
wood covering), it must be installed a minimum of 40" 
above the cooking surface.

Most range hoods contain combustible components which 
must be considered when planning the installation.