18-CD34D1-5-EN 19
INSTALLER’S GUIDE
i
White-Rodgers 36J gas valve
Inlet Pressure
Boss (opt.)
On/Off Switch
Outlet Pressure Boss
Regulator
Adjust-
ment
Table 14
FINAL MANIFOLD PRESSURE SET-
TINGS (inches w.c.)
FUEL
PRESSURE
NATURAL GAS
3.5" W.C.
LP GAS
10.5" W.C.
installed altitude. Input rate changes can be made by adjusting
the manifold pressure (min 3.0 - max 3.7 in. W.C. - Natural Gas)
or changing orifices (orifice change may not always be required).
Installation of this furnace at altitudes above 2,000 ft. (610m)
must be in accordance with local codes, or in the absence of
local codes, the National Fuel Gas Code, ANSI Z223.1/ NFPA
54 or National Standard of Canada, Natural Gas and Propane
Installation Code, CSA B149.1, and must be made in accordance
with the listed high Altitude Conversion Kit available with this
furnace.
If the desired input rate cannot be achieved with a change
in manifold pressure, then the orifices must be changed. LP
installations will require an orifice change.
▲
WARNING
!
DO NOT attempt to manually light the burner.
Failure to follow this warning could result in
property damage, personal injury or death.
IMPORTANT: Re-install the propane orifices to the same
depth as the orifices supplied with the equipment.
See Table 13 for help in selecting orifices if orifice change is
required. Furnace input rate and temperature rise should be
checked again after changing orifices to confirm the proper rate
for the altitude.
Installations above 4,000 feet may require a pressure switch
change. If required, use the BAYHALT*** Kit (High Altitude
Accessory Kit) listed in PRODUCT DATA.
TABLE 12
GAS FLOW IN CUBIC FEET PER HOUR
2 CUBIC FOOT DIAL
SEC. FLOW SEC. FLOW SEC. FLOW SEC. FLOW
8
900
29
248
50
144
82
88
9
800
30
240
51
141
84
86
10
720
31
232
52
138
86
84
11
655
32
225
53
136
88
82
12
600
33
218
54
133
90
80
13
555
34
212
55
131
92
78
14
514
35
206
56
129
94
76
15
480
36
200
57
126
96
75
16
450
37
195
58
124
98
73
17
424
38
189
59
122
100
72
18
400
39
185
60
120
104
69
19
379
40
180
62
116
108
67
20
360
41
176
64
112
112
64
21
343
42
172
66
109
116
62
22
327
43
167
68
106
120
60
23
313
44
164
70
103
124
58
24
300
45
160
72
100
128
56
25
288
46
157
74
97
132
54
26
277
47
153
76
95
136
53
27
267
48
150
78
92
140
51
28
257
49
147
80
90
144
50
HIGH ALTITUDE DERATE
TABLE 13
Orifice
Twist
Drill
Size If
Installed
At Sea
Level
ALTITUDE ABOVE SEA LEVEL
and Orifice Required At Other Elevations
2000 3000 4000 5000 6000 7000 8000 9000 10000
42
43
44
45
46
47
42
44
45
46
47
48
43
44
45
47
47
48
43
44
45
47
47
49
43
45
46
47
48
49
44
45
47
48
48
49
44
46
47
48
49
50
45
47
48
49
49
50
46
47
48
49
50
51
47
48
50
50
51
52
54
55
56
57
58
54
55
56
58
59
55
55
56
59
60
55
55
57
59
60
55
56
57
60
61
55
56
57
60
62
55
56
58
61
62
56
56
59
62
63
56
56
59
63
63
56
57
60
63
64
From National Fuel Gas Code - Table F-4
