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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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