Calculating alternate floor protection material, General installation procedure – Hearth and Home Technologies 4100I-GD-B User Manual

Page 7

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Page 7

September 1, 2008

4100-I ACT WOOD INSERT

250-7201E

R

IF INSTALLING THIS MODEL TO A MASONRY CHIMNEY,

ALWAYS BE SURE THE CHIMNEY IS IN GOOD CONDITION

AND THAT IT MEETS THE MINIMUM STANDARDS OF THE

NATiONAl FiRE PROTECTiON ASSOCiATiON (NFPA)

STANDARD 211. A FACTORY BUILT CHIMNEY MUST BE

6 iNCH (152mm) Ul103 HT AND UlC S629.

THiS APPliANCE iS MADE WiTH A 6 iNCH (152mm) DiAM-

ETER CHIMNEY CONNECTOR AS THE FLUE COLLAR ON

THE UNIT. CHANGING THE DIAMETER OF THE CHIMNEY

CAN AFFECT DRAFT AND CAUSE pOOR pERFOR-

MANCE. IT IS NOT RECOMMENDED TO USE OFFSETS

OR ELBOWS AT ALTITUDES ABOVE 4000 FEET ABOVE

SEA LEVEL OR WHEN THERE ARE OTHER FACTORS

THAT AFFECT FlUE DRAFT. SEE PAgE 5.

CAUTION: THIS AppLIANCE IS HOT WHILE IN OpERA-

TION AND MAY REMAIN SO Up TO 40 MINUTES OR

LONGER AFTER THERE IS NO FUEL IN THE FIREBOX.

IF THIS AppLIANCE IS IN A HIGH TRAFFIC AREA OR

CHILDREN MAY BE NEAR, IT IS RECOMMENDED THAT

YOU pURCHASE A DECORATIVE BARRIER TO GO IN

FRONT OF THE AppLIANCE.

CALCULATING ALTERNATE FLOOR

pROTECTION MATERIAL

Thermal Conductivity: k value

The k value indicates the amount of heat (in BTU’s) that will flow

in 1 hour through 1 square foot of a uniform material 1 inch thick

for each degree (F) of temperature difference from one side of

the material to the other. The LOWER the k factor means less

heat is being conducted through the non-combustible material to

the combustible material beneath it. The k value of a material

must be equal or smaller then the required k value to be accept-

able.

(BTU) (inch)

(foot

2

(hour) (

o

F)

Thermal Resistance: R value
The R value is a measure of a material’s resisteance to heat

transfer. R value is convenient when more than one material is

used since you can add the R values together, whereas you can

not do this for k value. The HIGHER the R factor means less

heat is being conducted through the non-combustible material to

the combustible material beneath it. The R value of a material

must be equal or larger then the required R value to be accept-

able.
Converting k to R:
Divide 1 by k and multiply the results times the thickness in inch-

es of the material.

R = 1/k x inches of thickness

Converting R to k:
Divide the inches of thickness by R.

k = inches of thickness/R

Calculations:
Example: Floor protection requires k value of 0.84 and /4 inch

thick.
Alternative material has a k value of 0.6 and is /4 inch thick.
Divide 0.6 by .75 = k value of 0.80. This k value is smaller than

0.84 and therefore is acceptable.

GENERAL INSTALLATION pROCEDURE

•

DO NOT CONNECT THIS UNIT TO A CHIMNEY

FLUE SERVING ANOTHER AppLIANCE.

•

Install liner, if required, for your chosen installation.

•

Attach metal warning plate to the back of the fireplace

with screws or nails.

•

Set appliance on the hearth (See Hearth Requirements

page 5 and Support Kit information on page 16.)

•

Complete the vent connection required for your instal-

lation type.

•

Relocate plate for Outside Air. (Required for Mobile

Home Installation)

page 13; Assemble Panel Set

and Cast Trim Set or the Basic Panel & Trim Set and

install as one piece.

See page 14.

•

Position unit into fireplace leaving width enough for fiber-

glass batting to be inserted around face seal.

•

Work unit securely into the fireplace using sheet metal

shims if leveling bolts are needed.

See Figure 12B on

page 12.

•

Remove all labels from glass prior to building first fire.

•

Ensure that plated surfaces are cleaned prior to build-

ing first fire.

See page 20.

•

Read Operation Instructions found on

pages 18 and

19.

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