Coleman 5151C Spezifikationen PDF herunterladen (Seite 8)

RETURN AIR REQUIREMENTS

CLOSET INSTALLATIONS

Figure 3 — Closet to Door Clearance — 6” or greater

CLOSET

FURNACE

DOOR

6” or greater —

Closet to Door

Clearance

Furnace to Closet Door Clearance —

Greater than 6 Inches

The closet door MUST have a minimum of 250

Square Inches of free area in the upper half of the

door.

If the opening for return air is located in the side-

wall and below the top of the furnace casing:

a. total side return must equal or exceed

350 sq. in. free area

b. 6” min. clearance must be provided on

thesidewherethereturnislocated

Return Air Grille Part No.

7900--286P/A — Almond

7900--287P/A — White

Return Air Closet Door Part No.

7900--8881 — Almond

7900--7771/C — White

c. 6” min. clearance must be maintained

in front of the furnace.

Additional Requirements

Additional requirements for floor and ceiling return system

for closet installed sealed combustion heating appliance are

given in the next paragraph.

Floor or Ceiling Return Air System

Floor or ceiling return air system for closet installed direct

vent forced air heating appliance.

Listed in the next paragraph are the conditions to be met by

Mobile Home Manufacturers to have U.L. acceptance of in--

floor or ceiling return air systems of closet installed direct

vent forced air heating appliances for Mobile Homes to be

sold in the United States.

A. The return--air opening into the closet, regardless of lo-

cation, is to be sized not less than specified on the

appliance’s rating plate.

B. If the return--air opening is located in the floor of the clos-

et (versus the vertical front or side wall), the opening is

to be provided with means to prevent its inadvertent clo-

sure by a flat object placed over the opening.

C. The cross--sectional area of the return duct system

(when located in the floor or ceiling of the mobile home)

leading into the closet is to be not less than that of the

opening specified on the appliance’s rating plate.

D. The total free area of openings in the floor or ceiling regis-

ters serving the return--air duct system is to be not less

than 150% of the size of the opening specified on the

appliance’s rating plate. At least one such register is to

be located where likelihood of its being covered by car-

peting, boxes, and other objects is minimized.

E. Materials located in the return duct system have a flame

spread classification of 200 or less.

F. Non--combustible pans having one--inch upturned

flanges are located beneath openings in the floor return

duct system.

G. Wiring materials located in the return duct system con-

form to Article 300--22 (b&c) of the National Electric

Code (ANSI C1 / NFPA--70).

H. Gas piping is not run in or through the return duct system.

I. The negative pressure in the closet as determined by

test with the air--circulating fan operating at high heating

speed and the closet door closed is to be not more nega-

tive than minus 0.05--inch water column.

J. For floor return systems, the mobile home manufacturer

or installer shall affix a prominent marking on or near the

appliance where it is easily read when the closet door is

open. The marking shall read:

HAZARD OF ASPHYXIATION

DO NOT COVER OR RESTRICT FLOOR OPENING

or equivalent.

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