—2—
340AAV
A05070
NOTES: 1. Minimum return-air openings at furnace, based on metal duct. If flex duct is used,
see flex duct manufacturerí s recommendations for equivalent diameters.
2. Minimum return-air opening at furnace:
a.For 800 CFM–16-in. round or 14
1
/
2
x 12-in. rectangle.
b. For 1200 CFM–20-in. round or 14
1
/
2
x 19
1
/
2
-in. rectangle.
c. For 1600 CFM–22-in. round or 14
1
/
2
x 23
1
/
4
-in. rectangle.
d. For airflow requirements above 1800 CFM, see Air Delivery table in Product Data
literature for specific use of single side inlets. The use of both side inlets, a
combination of 1 side and the bottom, or the bottom only will ensure adequate
return air openings for airflow requirements above 1800 CFM at 0.5” W.C. ESP.
17
5
⁄
16
"
24
1
⁄
2
"
27
9
⁄
16
"
TYP
27
5
⁄
8
"
29
11
⁄
16
"
TYP
30
13
⁄
16
"
32
5
⁄
8
"
TYP
33
1
⁄
4
"
TYP
CONDENSAT E
DRAIN TRAP
LOCATION
(ALTERNATE
UPFLOW)
7
⁄8-IN. DIA
ACCESSORY
POWER ENTRY
7
⁄8-IN. DIA
POWER CONN
CONDENSATE DRAIN
TRAP LOCATION
(DOWNFLOW &
HORIZONTAL LEFT)
26
15
⁄
16
"
24
1
⁄
2
"
22
5
⁄
16
"
2-IN. COMBUSTION-
AIR CONN
1
⁄2-IN. DIA
GAS CONN
2-IN. VENT CONN
1
⁄2-IN. DIA THERMOSTAT
ENTRY
22
11
⁄
16
"
SIDE INLET
23
1
⁄
4
" TYP
SIDE INLET
1
1
⁄
4
"
1"
OUTLET
26
15
⁄
16
"
28
1
⁄
2
"
22
5
⁄
16
"
19"
13
⁄
16
"
5
⁄
8
"
5
⁄
16
"
1"
39
7
⁄
8
"
22
1
⁄
4
" TYP
11
⁄
16
"
7
⁄
16
"
24
3
⁄
16
"
BOTTOM INLET
18
1
⁄
4
"
22
11
⁄
16
"
2-IN. COMBUSTION-
AIR CONN
1
⁄2-IN. DIA
GAS CONN
7
⁄8-IN. DIA
POWER CONN
1
⁄2-IN. DIA
THERMOSTAT ENTRY
2-IN. VENT CONN
DIMPLE LOCATORS
FOR HORIZONTAL
HANGING
14
1
⁄
2
"
TYP
SIDE INLET
9
7
⁄
16
"
TYP
26
15
⁄
16
" TYP
CONDENSAT E
DRAIN LOCATION
(UPFLOW)
30
1
⁄
2
"
9
⁄
16
"
TYP
CONDENSAT E
DRAIN LOCATION
(UPFLOW)
E
INLET
11
/
16
"
11
/
16
"
D
13
/
16
"
13
/
16
"
OUTLET
A
AIRFLOW
26
1
⁄
4
"
26
1
⁄
4
"
CONDENSATE DRAIN
TRAP LOCATION
(DOWNFLOW &
HORIZONTAL RIGHT)
OR ALTERNATE
1
⁄
2
-IN. DIA GAS CONN
DIMENSIONS (In.)
UNIT SIZE A D E SHIP. WEIGHT (Lb)
024040 17-1/2 15-7/8 16 165
036040 17-1/2 15-7/8 16 166
024060 17-1/2 15-7/8 16 172
036060 17-1/2 15-7/8 16 174
048060 17-1/2 15-7/8 16 174
036080 17-1/2 15-7/8 16 188
048080 17-1/2 15-7/8 16 194
060080 21 19-3/8 19-1/2 206
048100 21 19-3/8 19-1/2 219
060100 21 19-3/8 19-1/2 221
060120 24-1/2 22-7/8 23 250
060140 24-1/2 22-7/8 23 250
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