Amana AMH95 Installation Instructions Manual page 17

If the combustion air intake pipe is to be installed above a finished
ceiling or other area where dripping of condensate will be objec-
tionable, insulation of the combustion air pipe may be required.
Use 1/2" thick closed cell foam insulation such as Armaflex or
Insultube where required.
Dire ct V e nt (Dual Pipe )
Maximum A llow able Length of V ent/Flue & Combustion
Pipe
Unit Input V ent/Flue/A ir Intake
Size
(Btu) Termination
(in.)
Standard
045_3
A lternate
Standard
070_3
A lternate
Standard
070_4
A lternate
Standard
090_4
A lternate
Standard
090_5
A lternate
Standard
115_5
A lternate
1) Minimum requirement for each vent pipe is five (5) feet in length and one
elbow/tee.
2) Tees and/or elbows used in the vent/flue termination must be included
when determining the number of elbows in the piping system.
3) 3" diameter pipe can be used in place of 2" diameter pipe.
4) Increased Clearance Configurations using (2) 45 deg. Long Sweep
elbows should be considered equivalent to one 90 deg. elbow.
V /F C
ENT LUE AND OMBUSTION
The vent/flue and combustion air pipes may terminate vertically, as
through a roof, or horizontally, as through an outside wall.
Vertical pipe terminations should be as shown in the following
figure. Refer to Section IX, Vent/Flue Pipe and Combustion Pipe -
Termination Locations for details concerning location restrictions.
The penetrations through the roof must be sealed tight with proper
flashing such as is used with a plastic plumbing vent.
COMBUSTION
AIR INTAKE
12" MIN.
12" MIN.
TO ROOF OR
SCREEN
HIGHEST
ANTICIPATED
SNOW LEVEL
Vertical Terminations (Dual Pipe)
Horizontal terminations should be as shown in the following fig-
ure. Refer to Section IX, Vent/Flue Pipe and Combustion Pipe -
Termination Location for location restrictions. A 2 3/8 inch diameter
wall penetration is required for 2" diameter pipe while a 3 1/2 inch
diameter hole is required for 3" diameter pipe. To secure the pipe
passing through the wall and prohibit damage to piping connec-
tions, a coupling should be installed on either side of the wall and
solvent cemented to a pipe connecting the two couplings. The
pipe length should be the wall thickness plus the depth of the
socket fittings to be installed on the inside and outside of the wall.
The wall penetration should be sealed with silicone caulking ma-
terial.
A ir Intake Pipe (f t)
(1)(2)(3)(5)
Number of Elbow s
(4)
2 3 4 5 6
2 68 65 62 59 56
2 55 52 49 46 43
2 68 65 62 59 56
2 55 52 49 46 43
40
2 46 43
Not Recommended
2 33 30 27
3 68 65 62 59 56
3 55 52 49 46 43
3 68 65 62 59 56
3 55 52 49 46 43
3 68 65 62 59 56
3 55 52 49 46 43
A P T
IR IPE ERMINATIONS
TEE
VENT/FLUE
90º
MEDIUM RADIUS
ELBOWS
24" MAX.
3" MIN.
7 8
53 50
40 37
53 50
40 37
Standard Horizontal Terminations (Dual Pipe)
53 50
40 37
53 50
40 37
53 50
40 37
Alternate Horizontal Vent Termination (Dual Pipe)
SUPPORT
STRAPS
COMBUSTION
AIR INTAKE.
Standard Horizontal Terminations Above Anticipated Snow
Alternate Vent Termination Above Anticipated Snow Level
17
12" MIN
3" MIN
24" MAX
3" MIN
24" MAX
90°
MEDIUM
RADIUS
ELBOW
24" MAX
3" MIN
24" MAX
AIR
INTAKE
12" MIN
12" MIN.
3" MIN.
24" MAX.
SCREEN 12" MIN. ABOVE
HIGHEST ANTICIPATED
90°
SNOW LEVEL
MEDIUM
RADIUS
ELBOWS
Level (Dual Pipe)
90°
Medium Radius
Elbow
12" Min.
24" Max.
Screen
3" Min.
24" Max.
Air Intake
12" Min. Above
Highest Anticipated
Snow Level
(Dual Pipe)
VENT/FLUE
TEE
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
Vent