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036-21013-002 Rev. A (5/00)
TWO-STAGE UPFLOW/HORIZONTAL FURNACE DIMENSIONS
B
Power
Vent Connection
20
(vent size)
Wiring
7/8" K.O.
D
F
1-1/ 8
1-7/ 8
5
E
FRONT
TOP IMAGE
TWO-STAGE UPFLOW/HORIZONTAL RATINGS & PHYSICAL/ELECTRICAL DATA
G8D--UH /
MODELS
L8D-UH
.
INPUT
OUTPUT
NOM
WIDTH
/
/
MBH H
L
MBH H
L
CFM
57/42
46/34
1200
"A" 14-1/2
80/59
64/48
1200
"A" 14-1/2
80/59
64/48
1600
"B" 17-1/2
100/65
80/53
1200
"B" 17-1/2
100/65
80/53
2000
120/78
96/64
1600
120/78
96/64
2000
*
AFUE numbers are determined in accordance with DOE test procedures.
† Wire size and overcurrent protection must comply with the National Electrical Code (NFPA-70-latest edition).
• For altitudes above 2,000 ft., reduce capacity 4% for each 1,000 ft. above sea level. Refer to Form 650.74-N1.1V.
• Wire size based on copper conductors, 60° C, 3% voltage drop.
• Continuous return air temperature must not be below 55° F.
2
B
3/4
40
GAS INLET
1-1/4" X 2-1/2"
OPTIONAL SIDE
RETURN CUT-OUT
(EITHER SIDE)
A
F R O N T
F R O N T
A
1-1/ 8
20
C
7-3/ 8
FRONT
BOTTOM IMAGE
LOW FIRE
CABINET
*
TEMP RISE
AFUE
(
.)
IN
°
F
80.0
25 - 55
80.0
30 - 60
80.0
25 - 55
80.0
25 - 55
"C" 21
80.0
25 - 55
"C" 21
80.0
25 - 55
"C" 21
80.0
25 - 55
D
20
(Vent Connection)
POWER WIRING
7/8" HOLE
13-3/4
2-1/2
ACCESS
WIRING
7/8" K.O.
16
8-3/4
28-1/2
T'STAT WIRING
7/8" K.O.
L E F T S I D E
L E F T S I D E
Upflow/Horizontal
Models G8D-UH /
L8D-UH
*
14-1/2
G8D06012UHA11
*
14-1/2
G8D08012UHA11
*
17-1/2
G8D08016UHB11
G8D10012UHB11
17-1/2
*
21
G8D10020UHC11
G8D12016UHC11
21
*
21
G8D12020UHC11
*
L in the first character indicates LoNox.
.
HIGH
MAX
FIRE
OUTLET
TEMP
AIR TEMP
HP
°
°
RISE
F
F
35 - 65
165
1/3
40 - 70
175
1/3
25 - 55
160
3/4
40 - 70
170
1/2
30 - 60
160
1
45 - 75
180
1/2
35 - 65
170
1
14-3/4
5-3/8
2
32-1/2
14
23-1/2
R I G H T S I D E
R I G H T S I D E
A
B
C
D
13-1/4
10-1/8
4
13-1/4
10-1/8
4
16-1/4
13-1/8
4
16-1/4
13-1/8
4
19-3/4
16-5/8
4
19-3/4
16-5/8
4
19-3/4
16-5/8
4
BLOWER
TOTAL
UNIT
AMPS
(
)
AMPS
SIZE
IN
6.2
10 x 7
9.0
6.2
10 x 7
9.0
11.5
11 x 8
12.0
7.0
10 x 8
12.0
12.2
11 x 10
14.0
10.4
10 x 10
12.0
12.2
11 x 10
14.0
Unitary Products Group
Luxaire
2-1/4
1-1/8
E
F
10-1/8
3-3/4
10-1/8
3-3/4
11-5/8
3-3/4
11-5/8
3-3/4
13-3/8
3-3/4
13-3/8
3-3/4
13-3/8
3-3/4
MIN WIRE
.
MAX
SIZE
OPER
-
OVER
(
) @
AWG
.
WGT
CURRENT
75
.
FT
(
)
LBS
†
PROTECT
†
ONE WAY
20
14
105
20
14
117
20
14
126
20
14
128
20
12
145
20
14
145
20
12
147
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