Thermador Pro Harmony PRD304GHU Installation Manual page 7

than No. 28 MSG sheet steel, 0.015 inch (0.4 mm) thick
stainless steel, 0.024 inch (0.6 mm) aluminum, or 0.020
inch (0.5 mm) thick copper. Flame retardant materials bear
the following mark:
UNDERWRITERS LABORATORIES INC. CLASSIFIED
MINERAL AND FIBER BOARDS SURFACE BURNING
CHARACTERISTICS
Followed by the flame spread and smoke ratings. These
designations are shown as "FHC (FIame Spread/Smoke
Developed)." Materials with "O" flame spread ratings are
flame retardant. Local codes may allow other flame spread
ratings.
4. Any openings in the wall behind the range and in the
floor under the range must be sealed.
5. When there is less than a 12" horizontal clearance
between combustible material
Δ
and the back edge of
the range above the cooking surface, a Thermador
Low Back or Pot and Pan Shelf must be installed. (See
Figure 2). When clearance to combustible material
is over 12", a Thermador Flush Island Trim may be
used. Figure 2 indicates the space required for each
type of backguard.
6. Always keep appliance area clear and free from
combustible materials, gasoline and other flammable
vapors and liquids.
7. Do not obstruct the flow of combustion and ventilation
air to the unit.
8. A (10) inch minimum clearance is needed when the
range is installed beside a combustible side wall.
Δ
A
s defined in the "National Fuel Gas Code" (ANSI
Z223.1, Current Edition).
Δ
English 5