Upflow, Furnace – Bryant 394 Gas User Manual
Page 2
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UPFLOW
FURNACE
A70652
BOTTOM OPTIONAL
RETURN SIDE FILTER RACK
OPENING EITHER SIDE
A66384
Model
No.
A.G.A. RATINGS BTU/HR
Gas Connection
Sizes
Bottom
Filter
Sizes
Side
Filter
Sizes
Approx.
Shipping
Weight
Natural Propane
Input
Bonnet
Capacity
Input
Bonnet
Capacity
Natural Propane
50-394
50,000
40,000
50,000
40,000
1/2
1/2
14
X
25
X
1
14
X
25
X
1
135
80-394
80,000
64,000
75,000
60,000
1/2
1/2
14
X
25
X
1
14
X
25
X
1
153
100-394
100,000
80,000
100,000
80,000
1/2
1/2
16
X
25
X
1
16
X
25
X
1
178
125-394
125,000
100,000
125,000
100,000
1/2
1/2
20
X
25
X
1
20
X
25
X
1
200
137-394
137,500
110,000
Not Available
1/2
1/2
20
X
25
X
1
20
X
25
X
1
202
165-394
165,000
132,000
150,000
120,000
1/2
1/2
(2) 14
X
25
X
1 .
(2) 16
X
25
X
1
282
190-394
190,000
152,000
175,000
140,000
1/2
1/2
(1) 16
X
25
X
1
(1) 20
X
25
X
1
(2) 16
X
25
X
1
365
220-394
220,000
176,000
200,000
160,000
1/2
1/2
(1) 16
X
25
X
1
(1) 20
X
25
X
1
(2) 16
X
25
X
1
365
Model No.
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S*
T*
50-394
16-1/4
26
46
14-5/8 19-3/41
1/2 2-9/16
4"
12-1/4
22-5/8
1-1/2
12 23
1-1/4
2-1/8
2-7/8
25-7/16
80-394
16-1/4
26
46
14-5/8 ¡9-3/4
1/2 2-9/16
4"
12-1/4
22-5/8
1-1/2
12 23
1-1/4
2-1/8
2-7/8
25-7/16
100-394
18-1/4
26
46
16-5/8 19-3/4
1/2 2-3/4
5"
14-1/4
22-5/8
1-1/2
14 23
1-1/4
2-1/8
2-7/8
25-7/16
125-394
20-1/4
26
46
18-5/8 19-3/4
1/2 2-3/4
5".
18-1/4
22-5/8
1-1/2
18 23
1-1/4
2-1/8
2-7/8
25-7/16
137-394
20-1/4
26
46
18-5/8 19-3/4
1/2 2-3/4
5"
18-1/4
22-5/8
1-1/2
18 23
1-1/4
2-1/8
2-7/8
25-7/16
165-394
28-1/4
28-13/16
51
26-5/8
17-3/4 2-1/2 5
6"
25-1/4
23-5/16
2-5/8
23
24
2-1/8
8-5/8
4-1/16 30-5/8
190-394
36-1/4
28-13/16
51
34-5/8
17-3/4 2-1/2 5
(2) 5"
33-1/4
23-5/16
2-5/8
23
24
2-1/8
8-5/8
4-1/16 30-5/8
220-394
36-1/4
28-13/16
51
34-5/8 17-3/4 2-1/2 5
(2) 5"
33-1/4
23-5/16
2-5/8
23
24
2-1/8
8-5/8
4-1/16 30-5/8
*Optional gas inlet right and left sides provided. T = 33-5/8 and S = 3-1/2 on 50 thru 137 sizes only.
is a pilot flame, the current generated by the thermo
couple holds the 100% inline shut-off valve in the open
position and the gas control valve controls the flow
of gas. Should the pilot go out, no current will be
generated by the thermocouple and the 100% inline
shut-off valve will close. No gas can then flow to the
pilot.
D5 Natural
Should the pilot go out, no current will be generated
by the thermocouple and the pilot-relay will close,
shutting off the gas to the pilot, and breaking the elec
trical circuit to the Bryant automatic gas control valve.
821/822 Adjustable Fan Control
The Model 394 Furnace incorporates the 821/822
relay for fan control. (The 821 relay is used with the
643 gas valve on furnace sizes 50 through 165 natural
gas; the 822 relay is used with the 641 valve on sizes
190 and 220 and all propane units.) The 821/822 has a
field-adjustable differential. The “max. off” setting on
the dial is for the longest “off” time and shortest
“on” time.
When facing the front of the furnace, the “off” cycle
is lengthened by moving the adjustment lever to the
Figure 1 - Control Section (D5 pilot relay shown)
left. The “off’ cycle is shortened by moving the lever
to the right. The adjustment of the “off’ cycle has the
opposite effect on the “on” cycle; however, to a lesser
degree.
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