Amana AMH8 Operations Instructions download pdf (Page 21)

PRODUCT DESIGN

als, a minimum of 24 inches service clearance must be

available in front of the unit.

A furnace installed in a confined space (i.e., a closet or

utility room) must have two ventilation openings with a total

minimum free area of 0.25 square inches per 1,000 BTU/

hr of furnace input rating. One of the ventilation openings

must be within 12 inches of the top; the other opening must

be within 12 inches of the bottom of the confined space. In

a typical construction, the clearance between the door and

door frame is usually adequate to satisfy this ventilation

requirement.

Furnace Suspension

If suspending the furnace from rafters or joist, use 3/8"

threaded rod and 2”x2”x1/8” angle iron as shown in the

following figure. If the furnace is installed in a crawl space

it must also be suspended from the floor joist or supported

by a concrete pad. Never install the furnace on the ground

or allow it to be exposed to water. The length of rod will

depend on the application and the clearances necessary.

TILT OUTWARD TO ALLOW FOR

DOOR AND CIRCULATOR BLOWER

REMOVAL.

3/8" DIAMETER

THREADED ROD

(6 PLACES)

PROVIDE 8" MINIMUM CLEARANCE BETWEEN

CENTER ROD AND FURNACE CABINET

TO ALLOW FOR CIRCULATOR BLOWER REMOVAL.

ASSURE FURNACE IS LEVEL FROM

END TO END.

90% FURNACES MAKE SURE

THE UNIT HAS A SLIGHT

FORWARD TILT WITH THE FRONT

OF THE FURNACE 0"-3/4"

BELOW THE BACK OF THE FURNACE.

POSITION AS CLOSE AS POSSIBLE

TO BLOWER DECK TO ALLOW FOR

CIRCULATOR BLOWER REMOVAL.

1/8"

ANGLE IRON

(3 PLACES)

HOLD DOWN

NUTS

SUPPORT

NUTS

CONDENSATE

DRAIN

GAS PIPING

ALTERNATE

GAS PIPING

Suspended Furnace

EXISTING FURNACE REMOVAL

NOTE: When an existing furnace is removed from a vent-

ing system serving other appliances, the venting system

may be too large to properly vent the remaining attached

appliances.

The following vent testing procedure is reproduced from the

American National Standard/National Standard of Canada

for Gas-Fired Central Furnaces ANSI Z21.47, latest edi-

tion, CSA-2.3b, latest edition Section 1.23.1.

The following steps shall be followed with each appliance connected to the

venting system placed in operation, while any other appliances connected

to the venting system are not in operation:

a. Seal any unused openings in the venting system;

b. Inspect the venting system for proper size and horizontal pitch, as

required by the National Fuel Gas Code, ANSI Z223.1 or the CSA

B149 Installation Codes and these instructions. Determine that

there is no blockage or restriction, leakage, corrosion and other

deficiencies which could cause an unsafe condition;

c. In so far as practical, close all building doors and windows and all

doors between the space in which the appliance(s) connected to the

venting system are located and other spaces of the building. Turn

on clothes dryers and any appliance not connected to the venting

system. Turn on any exhaust fans, such as range hoods and

bathroom exhausts, so they shall operate at maximum speed. Do

not operate a summer exhaust fan. Close fireplace dampers;

d. Follow the lighting instructions. Place the appliance being inspected

in operation. Adjust thermostat so appliance shall operate continu-

ously;

e. Test for draft hood equipped spillage at the draft hood relief opening

after 5 minutes of main burner operation. Use the flame of a match

or candle;

f. After it has been determined that each appliance connected to the

venting system properly vents when tested as outlined above,

return doors, windows, exhaust fans, fireplace dampers and any

other gas burning appliance to their previous conditions of use;

g. If improper venting is observed during any of the above tests, the

common venting system must be corrected.

Corrections must be in accordance with the latest edition of

the National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or

CSA B149 Installation Codes.

If resizing is required on any portion of the venting system,

use the appropriate table in Appendix G in the latest edition

of the National Fuel Gas Code ANSI Z223.1 and/or

CSA B149 Installation Codes.

Thermostat Requirements

A high quality single stage thermostat with a common termi-

nal is recommended.

Thermostat Location

In an area having good air circulation, locate the thermo-

stat and dehumidistat (if applicable) about five feet high on

a vibration-free inside wall. Do not install the thermostat or

dehumidistat where it may be influenced by any of the fol-

lowing:

• Drafts, or dead spots behind doors, in corners, or

under cabinets.

• Hot or cold air from registers.

• Radiant heat from the sun.

• Light fixtures or other appliances.

• Radiant heat from a fireplace.

• Concealed hot or cold water pipes, or chimneys.

• Unconditioned areas behind the thermostat and de-

humidistat, such as an outside wall.

Consult the instructions packaged with the thermostat and

dehumidistat for mounting instructions and further precau-

tions.

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Amana AMH8 Operations Instructions Page 21

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