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Amana AMV9 Installation Instructions Manual: Circulating Air & Filters; Ductwork - Air Flow; Bottom Return Air Opening [upflow Models ]

Two-stage variable speed gas-fired warm air furnace.
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gas. Do not rely on your sense of smell. Contact a local propane
gas supplier about installing a gas detecting warning system. If
the presence of gas is suspected, follow the instructions on Page
4 of this manual.
All propane gas equipment must conform to the safety standards
of the National Board of Fire Underwriters, NBFU Manual 58.
For satisfactory operation, propane gas pressure must be 11 inch
w.c. at the furnace manifold with all gas appliances in operation.
Maintaining proper gas pressure depends on three main factors:
1. Vaporization rate, depending on temperature of the liquid,
and "wetted surface" area of the container or containers.
2. Proper pressure regulation. (Two-stage regulation is
recommended for both cost and efficiency).
3. Pressure drop in lines between regulators, and between
second stage regulator and the appliance. Pipe size will
depend on length of pipe run and total load of all appliances.
Complete information regarding tank sizing for vaporization, rec-
ommended regulator settings, and pipe sizing is available from
most regulator manufacturers and propane gas suppliers.
Since propane gas will quickly dissolve white lead and most stan-
dard commercial compounds, special pipe dope must be used.
Shellac-based compounds resistant to the actions of liquefied pe-
troleum gases such as Gasolac
®
Crane
are satisfactory.
Refer to the following illustration for typical propane gas installa-
tions.
First Stage
Regulator
200 PSIG
Maximum
Propane Gas Installation (Typ.)
Sizing Between First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.
Pipe or
Tubing
Tubing Size, O.D. Type L
Length,
3/8"
1/2"
5/8"
Feet
10
730
1,700
3,200
20
500
1,100
2,200
30
400
920
2,000
40
370
850
1,700
50
330
770
1,500
60
300
700
1,300
80
260
610
1,200
100
220
540
1,000
125
200
490
900
150
190
430
830
175
170
400
780
200
160
380
730
To convert to capacities at 15 psig settings - multiply by 1.130
To convert to capacities at 5 psig settings - multiply by 0.879
Propane Gas Piping Chart I
®
, Stalactic
®
, Clyde's
®
5 to 15 PSIG
(20 PSIG Max.)
Continuous
11" W.C.
Second Stage
Regulator
Nominal Pipe Size
Schedule 40
3/4"
7/8"
1/2"
5,300
8,300
3,200
3,700
5,800
2,200
2,900
4,700
1,800
2,700
4,100
1,600
2,400
3,700
1,500
2,200
3,300
1,300
1,900
2,900
1,200
1,700
2,600
1,000
1,400
2,300
900
1,300
2,100
830
1,200
1,900
770
1,100
1,800
720
Sizing Between Single or Second Stage Regulator and Appliance*
Maximum Propane Capacities Listed are Based on 1/2" W.C. pressure drop at 11" W.C. setting.
Capacities in 1,000 BTU/hour.
Pipe or
Tubing
Tubing Size, O.D. Type L
Length,
3/8"
1/2"
Feet
10
39
92
20
26
62
30
21
50
40
19
41
50
18
37
60
16
35
80
13
29
100
11
26
125
10
24
150
9
21
200
8
19
250
8
17
*Data in accordance with NFPA pamphlet NO. 54
XIII. CIR
XIII. CIR
XIII. CIR
XIII. CIR
XIII. CIRCUL
D
- A
UCTWORK
IR
Duct systems and register sizes must be properly designed for the
CFM and external static pressure rating of the furnace. Design the
ductwork in accordance with the recommended methods of "Air
or John
Conditioning Contractors of America" Manual D.
Install the duct system in accordance with Standards of the Na-
tional Board of Fire Underwriters for the Installation of Air Condi-
tioning, Warm Air Heating and Ventilating Systems. Pamphlets No.
90A and 90B.
A closed return duct system must be used, with the return duct
connected to the furnace. NOTE: Ductwork must never be attached
to the back of the furnace. Flexible joints may be used for supply
and return connections to reduce noise transmission. To prevent
the blower from interfering with combustion air or draft when a
central return is used, a connecting duct must be installed be-
tween the unit and the utility room wall. Never use a room, closet,
or alcove as a return air chamber.
B
R
OTTOM
ETURN
The bottom return air opening on upflow models utilizes a "lance
and cut" method to remove sheet metal from the duct opening in
the base pan. To remove, simply press out the lanced sections by
hand to expose the metal strips retaining the sheet metal over the
3/4"
duct opening. Using tin snips, cut the metal strips and remove the
7,500
sheet metal covering the duct opening. In the corners of the open-
4,200
ing, cut the sheet metal along the scribe lines to free the duct
4,000
flanges. Using the scribe line along the duct flange as a guide,
3,700
3,400
unfold the duct flanges around the perimeter of the opening using
3,100
a pair of seamer pliers or seamer tongs. NOTE: Airflow area will be
2,600
2,300
reduced by approximately 18% if duct flanges are not unfolded.
2,100
This could cause performance issues and noise issues.
1,900
1,700
1,500
E
DGES OF SHEET METAL MAY BE SHARP.
WHEN REMOVING SHEET METAL FROM THE DUCT OPENING.
26
5/8"
3/4"
7/8"
1-1/8"
1/2"
3/4"
199
329
501
935
275
131
216
346
630
189
107
181
277
500
152
90
145
233
427
129
79
131
198
376
114
72
121
187
340
103
62
104
155
289
89
55
90
138
255
78
48
81
122
224
69
43
72
109
202
63
39
66
100
187
54
36
60
93
172
48
Propane Gas Piping Chart II
CUL
CUL
CULA A A A A TIN
TIN
TIN
G AIR & FIL
G AIR & FIL
CUL
TIN
TING AIR & FIL
G AIR & FIL
G AIR & FILTER
F
LOW
A
O
[U
M
IR
PENING
PFLOW
WARNING
U
SE GLOVES AS A PRECAUTION
Nominal Pipe Size
Schedule 40
1"
1-1/4" 1-1/2"
567
1,071
2,205
3,307
393
732
1,496
2,299
315
590
1,212
1,858
267
504
1,039
1,559
237
448
913
1,417
217
409
834
1,275
185
346
724
1,066
162
307
630
976
146
275
567
866
132
252
511
787
112
209
439
665
100
185
390
590
TER
TER
TERS S S S S
TER
]
ODELS

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