Maytag Amana ACVM97 Series Service Instructions Manual page 52

SCHEDULED MAINTENANCE
CLOCKING A GAS METER
1. Turn off all gas appliances in the home.
2. Turn on the furnace. Ensure the furnace is operating at 100% firing rate on 2 stage and modulating furnace product.
3. Once heating cycle is at a steady state (typically 15 minutes of operation), use a stopwatch to time how long it takes
the smallest unit of measure dial on the gas meter to make a full revolution. In Table 1, one cubic foot is selected. The
smallest unit of measure will vary depending on the gas meter.
In this example
we are using the
one cubic foot
dial on the gas
4. Using Table 2 below, find the number of seconds it took for the dial to make a full revolution. To the right of that number of
seconds and below the Size of Test Dial (selected in step 3 and shown in Table 1) will be the Cubic Feet per Hour (CFH).
Locate 40 seconds for one
revolu�on in the chart below
Seconds for
One
Revolution
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
52
meter
Then locate the 1 cu � dial column and select the
corresponding CFH from the 40 seconds for one revolu�on row
GAS RATE -- CUBIC FEET PER HOUR
Size of Test Dial
1/4 1/2 1
cu/ft cu/ft cu/ft
90 180 360
82 164 327
75 150 300
69 138 277
64 129 257
60 120 240
56 113 225
53 106 212
50 100 200
47 95 189
45 90 180
43 86 171
41 82 164
39 78 157
37 75 150
36 72 144
34 69 138
33 67 133
32 64 129
31 62 124
30 60 120
-- -- 116
28 56 113
-- -- 109
26 53 106
-- -- 103
1
One
Table 1
Seconds for
2 5
One
cu/ft cu/ft
Revolution
720 1800 36
655 1636 37
600 1500 38
555 1385 39
514 1286 40
480 1200 41
450 1125 42
424 1059 43
400 1000 44
379 947 45
360 900 46
343 857 47
327 818 48
313 783 49
300 750 50
288 720 51
277 692 52
265 667 53
257 643 54
248 621 55
240 600 56
232 581 57
225 563 58
218 545 59
212 529 60
206 514
Table 2
1
CUBIC
FEET
Size of Test Dial
1/4 1/2 1
cu/ft cu/ft cu/ft
25 50 100
-- -- 97
23 47 95
-- -- 92
22 45 90
-- -- --
21 43 86
-- -- --
-- 41 82
20 40 80
-- -- 78
19 38 76
-- -- 75
-- -- --
18 36 72
-- -- --
-- -- 69
17 34 --
-- -- 67
-- -- --
16 32 64
-- -- --
-- 31 62
-- -- --
15 30 60
2 5
cu/ft cu/ft
200 500
195 486
189 474
185 462
180 450
176 439
172 429
167 419
164 409
160 400
157 391
153 383
150 375
147 367
144 360
141 355
138 346
136 340
133 333
131 327
129 321
126 316
124 310
122 305
120 300