Page 15
INPUT CHECK AND ADJUSTMENT
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 (in cfh) Table 3 with the
time clocked.
4. Read the “Flow” column opposite the number of seconds
clocked.
5. Use the following factors if necessary.
For 1 Cu. Ft. Dial Gas Flow CFH =
Chart Flow Reading / 2
For 1/2 Cu Ft. Dial Gas Flow CFH =
Chart Flow Reading / 4
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.
7. Changes can be made by adjusting the manifold pressure.
a. Attach a manifold pressure gauge.
b. Remove the slot screw on top of the gas valve for 1st stage
manifold pressure adjustment. Remove slot screw on outlet
side for 2nd stage adjustment (See Figure 17).
c. Turn the adjustment nut in to increase the gas flow rate, and
out to decrease the gas flow rate using a 3/32" hex wrench.
Note:
If Model YCZ036F1,3M is installed in a region where NOX must be
below 40 nanograms per input to 72,000 BTUH.
GAS PIPING INSTALLATION
R
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8
0
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9
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2
0
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2
8
8
8
9
0
0
8
0
3
0
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2
1
5
1
4
1
4
8
6
8
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1
0
2
7
1
3
2
3
2
2
5
8
3
1
6
8
4
8
1
1
5
5
6
2
3
5
2
2
3
5
6
3
1
8
8
2
8
2
1
0
0
6
3
3
8
1
2
4
5
3
3
1
0
9
0
8
3
1
5
5
5
4
3
2
1
2
5
5
1
3
1
2
9
8
7
4
1
4
1
5
5
3
6
0
2
6
5
9
2
1
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9
6
7
5
1
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8
4
6
3
0
0
2
7
5
6
2
1
6
9
5
7
6
1
0
5
4
7
3
5
9
1
8
5
4
2
1
8
9
3
7
7
1
4
2
4
8
3
9
8
1
9
5
2
2
1
0
0
1
2
7
8
1
0
0
4
9
3
5
8
1
0
6
0
2
1
4
0
1
9
6
9
1
9
7
3
0
4
0
8
1
2
6
6
1
1
8
0
1
7
6
0
2
0
6
3
1
4
6
7
1
4
6
2
1
1
2
1
1
4
6
1
2
3
4
3
2
4
2
7
1
6
6
9
0
1
6
1
1
2
6
2
2
7
2
3
3
4
7
6
1
8
6
6
0
1
0
2
1
0
6
3
2
3
1
3
4
4
4
6
1
0
7
3
0
1
4
2
1
8
5
4
2
0
0
3
5
4
0
6
1
2
7
0
0
1
8
2
1
6
5
5
2
8
8
2
6
4
7
5
1
4
7
7
9
2
3
1
4
5
6
2
7
7
2
7
4
3
5
1
6
7
5
9
6
3
1
3
5
7
2
7
6
2
8
4
0
5
1
8
7
2
9
0
4
1
1
5
8
2
7
5
2
9
4
7
4
1
0
8
0
9
4
4
1
0
5
TABLE 3
1st Stage (Lo)
Manifold
Pressure
Adjustment
2nd Stage (Hi)
Manifold
Pressure
Adjustment
HIGH ALTITUDE INSTALLATION
Unit nameplate ratings are based on equipment operation from sea
level to 2000 feet elevation above sea level. If the unit installation
is from 2000 - 4500 feet elevation, it will be necessary to change
the burner orifices to the noted sizes, (ref. National Fuel Gas Code,
sec 8.1.2, Appendix F, Table F4).
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5
5
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Switch Toggles
"ON" or "OFF"
17
