18-CD19D7-22
19
Installer’s Guide
White-Rodgers 36J gas valve
TABLE 12
ORIFICE SIZES
INPUT
RATING
BTUH
NUMBER
OF
BURNERS
MAIN BURNER ORIFICE
DRILL SIZE
NAT. GAS
LP GAS
40,000
60,000
80,000
100,000
120,000
140,000
2
3
4
5
6
7
45
45
45
45
45
45
56
56
56
56
56
56
TABLE 13
PART NUMBERS FOR REPLACEMENT ORIFICES
DRILL
SIZE
PART
NUMBER
DRILL
SIZE
PART
NUMBER
44
45
46
47
48
49
50
ORF00501
ORF00644
ORF00909
ORF00910
ORF01099
ORF00503
ORF00493
54
55
56
57
58
59
ORF00555
ORF00693
ORF00907
ORF00908
ORF01338
ORF01339
HIGH ALTITUDE DERATE
Input ratings (BTUH) of these furnaces are based on sea
level operation and should not be changed at elevations up to
2,000 ft.
If the installation is 2,000 ft. or above, the furnace input rate
(BTUH) shall be reduced 4% for each 1,000 ft. above sea
level. The furnace input rate shall be checked by clocking
the gas flow rate (CFH) and multiplying by the heating value
obtained from the local utility supplier for the gas being
delivered at the 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). 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.
IMPORTANT:
Reinstall the propane orifices to the same depth
as the orifices supplied with the equipment.
See Table 15 (page 20) 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 14
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
Outlet Pressure Boss
Outlet Pressure Boss
On/Off
ff Swi
Switch
ch
Inlet Pressure
let Pressure
Boss
Boss (opt.)
.)
Regul
ulator
tor
Adj
Adjust
ust
White-Rodgers 36G gas valve
Installation of this furnace at altitudes above 2,000 ft.
(610m) shall be in accordance with the 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 149.1
. Installation of
this furnace at altitudes above 2,000 ft. (610m) shall be made
in accordance with the listed high Altitude Conversion Kit
available with this furnace.
j
Inlet Pressure
Boss (opt.)
Outlet Pressure Boss
Regulator
Adjustment
On/Off Switch
k
