Combustion And Input Check - Trane S8V2A040M3PC Installation, Operation And Maintenance Manual

F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n
I I m m p p o o r r t t a a n n t t : : If local codes allow the use of flexible gas
appliance connector, always use a new
listed connector. Do not use a connector
which has previously serviced another gas
appliance.
Refer to the piping table for delivery sizes. Connect gas
supply to the unit, using a ground joint union and a
manual shut-off valve. National codes require a
condensation drip leg to be installed ahead of the gas
valve.
The furnace and its individual shut-off valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of 1/2 psig (3.5 kPa).
The furnace must be isolated from the gas supply
piping by closing its individual manual shut-off valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psig
(3.5 kPa).
N N o o t t e e : : Maximum pressure to the gas valve for natural
gas is 13.8" W.C. Minimum pressure is 5.0" W.C.
Maximum pressure to the gas valve for propane
is 13.8" W.C. Minimum pressure is 11.0" W.C.
NATURAL GAS ONLY
TABLE OF CUBIC FEET PER HOUR OF GAS
FOR VARIOUS PIPE SIZES AND LENGTHS
PIPE LENGTH OF PIPE
SIZE
10 20 30
1/2 131 90
3/4 273 188 151
1 514 353 284
1–1/4 1060 726 583
This table is based on Pressure Drop of 0.3 inch W.C. and 0.6 SP.
GR. Gas
All gas fittings must be checked for leaks using a soapy
solution before lighting the furnace. D D O O N N O O T T C C H H E E C C K K
W W I I T T H H A A N N O O P P E E N N F F L L A A M M E E ! !
For propane conversions on all other S-Series
Furnaces, use BAYLPSS400* conversion kit with
stainless steel burners.
ORIFICE SIZES
INPUT
NUMBER OF
RATING
BURNERS
BTUH
40,000
2
60,000
3
80,000
4
100,000
5
120,000
6
28
40 50 60
72 62 55 50
129 114 104
243 215 195
499 442 400
MAIN BURNER ORIFICE
DRILL SIZE
PROPANE
NAT. GAS
GAS
45 56
45 56
45 56
45 56
45 56

Combustion and Input Check

1. Make sure all gas appliances are off except the
furnace.
2. Clock the gas meter with the furnace operating
(determine the dial rating of the meter) for one
revolution.
3. Match the "Sec" column in the gas flow table with
the time clocked.
4. Read the "Flow" column opposite the number of
seconds clocked.
5. Use the following factors if necessary:
a. For 1 Cu. Ft. Dial Gas Flow CFH = Chart Flow
Reading ÷ 2
b. For 1/2 Cu Ft. Dial Gas Flow CFH = Chart Flow
Reading ÷ 4
c. For 5 Cu. Ft. Dial Gas Flow CFH = 10X Chart Flow
Reading ÷ 4
6. Multiply the final figure by the heating value of the
gas obtained from the utility company and compare
to the nameplate rating. This must not exceed the
nameplate rating.
Sec. Flow
10 732
70
11 666
46
12 610
95
13 563
179
14 523
368
15 488
16 458
17 431
18 407
19 385
20 366
21 349
22 333
23 318
24 305
25 293
26 282
27 271
28 262
29 253
30 244
Gas Flow in Cubic Feet Per Hour
2 Cubic Foot Dial
Sec. Flow Sec. Flow
31 236 52 141
32 229 53 138
33 222 54 136
34 215 55 133
35 209 56 131
36 203 57 128
37 198 58 126
38 193 59 124
39 188 60 122
40 183 62 118
41 179 64 114
42 174 66 111
43 170 68 108
44 166 70 105
45 163 72 102
46 159 74 99
47 156 76 96
48 153 78 94
49 149 80 92
50 146 82 89
51 144 84 87
S8V2-SVX001-1A-EN
Sec. Flow
86 85
88 83
90 81
94 78
98 75
100 73
104 70
108 68
112 65
116 63
120 61
130 56
140 52
150 49
160 46
170 43
180 41
190 39
200 37