See Table 17 & 18 for help in selecting orifices if orifice change is required. Furnace input rate and tempera- ture rise should be checked again after changing ori- fices 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 17
PART NUMBERS FOR REPLACEMENT ORIFICES
DRILL | PART | DRILL | PART |
SIZE | NUMBER | SIZE | NUMBER |
44 | ORF00501 | 54 | ORF00555 |
45 | ORF00644 | 55 | ORF00693 |
46 | ORF00909 | 56 | ORF00907 |
47 | ORF00910 | 57 | ORF00908 |
48 | ORF01099 | 58 | ORF01338 |
49 | ORF00503 | 59 | ORF01339 |
50 | ORF00493 |
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REINSTALLATION OF THE BURNER BOX COVER
Figure 57 shows the correct way to reinstall the burner box cover if adjustment or replacement of the flame sensor, hot surface igniter, or main burner orifices have required removal of the cover.
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| TABLE 18 |
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Orifice |
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| ALTITUDE ABOVE SEA LEVEL |
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Twist Drill |
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Size If |
| and Orifice Required At Other Elevations | |||||||||
Installed |
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At Sea |
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Level | 2000 | 3000 | 4000 | 5000 | 6000 | 7000 | 8000 | 9000 | 10000 | ||
42 | 42 |
| 43 |
| 43 | 43 | 44 | 44 | 45 | 46 | 47 |
43 | 44 |
| 44 |
| 44 | 45 | 45 | 46 | 47 | 47 | 48 |
44 | 45 |
| 45 |
| 45 | 46 | 47 | 47 | 48 | 48 | 50 |
45 | 46 |
| 47 |
| 47 | 47 | 48 | 48 | 49 | 49 | 50 |
46 | 47 |
| 47 |
| 47 | 48 | 48 | 49 | 49 | 50 | 51 |
47 | 48 |
| 48 |
| 49 | 49 | 49 | 50 | 50 | 51 | 52 |
54 | 54 |
| 55 |
| 55 | 55 | 55 | 55 | 56 | 56 | 56 |
55 | 55 |
| 55 |
| 55 | 56 | 56 | 56 | 56 | 56 | 57 |
56 | 56 |
| 56 |
| 57 | 57 | 57 | 58 | 59 | 59 | 60 |
57 | 58 |
| 59 |
| 59 | 60 | 60 | 61 | 62 | 63 | 63 |
58 | 59 |
| 60 |
| 60 | 61 | 62 | 62 | 63 | 63 | 64 |
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From National Fuel Gas Code - Table
▲! WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow the installation instructions for the venting system being placed into operation could re- sult in carbon monoxide poisoning or death.
START UP AND ADJUSTMENT
PRELIMINARY INSPECTIONS
With gas and electrical power “OFF”
1.Duct connections are properly sealed
2.Filters are in place
3.Venting is properly assembled
4.Blower door is in place
Flip the switch on main gas valve within the unit to the “OFF” position. Turn the external gas valve to “ON”. Purge the air from the gas lines. After purging, Check all gas connections for leaks with a soapy solution —
Installer’s Guide
DO NOT CHECK WITH AN OPEN FLAME. Allow 5 minutes for any gas that might have escaped to dissi- pate. LP Gas being heavier than air may require forced ventilation. Flip the switch on the gas valve in the unit to the “ON” position.
I | Outlet Pressure Boss | Regulator | |
Adjustment | |||
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Inlet Pressure |
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Boss (opt.) | On/Off Switch |
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O On/Off Switch |
LIGHTING INSTRUCTIONS
▲! WARNING
DO NOT attempt to manually light the burner.
Failure to follow this warning could result in property damage, personal injury or death.
Lighting instructions appear on each unit. Each instal- lation must be checked out at the time of initial start up to insure proper operation of all components. Check out should include putting the unit through one complete cycle as outlined below.
Turn on the main electrical supply and set the thermo- stat above the indicated temperature. The ignitor will automatically heat, then the gas valve is energized to permit the flow of gas to the burners. After ignition and flame is established, the flame control module monitors the flame and supplies power to the gas valve until the thermostat is satisfied.
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