GAS
SUPPLY
MANUAL
SHUTOFF VALVE (REQUIRED)
SEDIMENT
TRAP
UNION
→ | A89417 |
Fig. 7ÐTypical Gas Pipe Arrangement |
WARNING: Use the proper length of pipes to avoid stress on the gas control manifold. Failure to follow this warning can result in a gas leak, causing fire, explosion, personal injury, or death.
CAUTION: Connect the gas pipe to the furnace using a backup wrench to avoid damaging gas controls.
WARNING: Never purge a line into a combustion chamber. Never use matches, candles, flame, or other sources of ignition for the purpose of checking leakage. Use a soap-and-water solution to check for leakage. Failure to follow this warning can cause a fire, explosion, personal injury, or death.
VI. ELECTRICAL CONNECTIONS
A.115-v Wiring
Refer to the unit rating plate or Table 5 for equipment electrical requirements. The control system requires an earth ground for proper operation.
CAUTION: Do not connect aluminum wire between disconnect switch and furnace. Use only copper wire.
→Make all electrical connections in accordance with the National Electrical Code (NEC) ANSI/NFPA 70-1996 and local codes or ordinances that might apply. For Canadian installations, all elec- trical connections must be made in accordance with CSA C22.1 Canadian Electrical Code, or authorities having jurisdiction.
→WARNING: The cabinet MUST have an uninterrupted
or unbroken ground according to NEC, ANSI/NFPA 70-1996 and Canadian Electrical Code, CSA C22.1 or local codes to minimize personal injury if an electrical fault should occur. This may consist of electrical wire or conduit approved for electrical ground when installed in accordance with existing electrical codes. Do not use gas piping as an electrical ground. Failure to follow this warning could result in electrical shock, fire, or death.
The auxiliary junction box (J-box) can be moved to the left-hand side of the furnace when a left-side power supply is desired. Remove the 2 screws holding the auxiliary J-box. Mount the J-box on the left-hand side of the furnace (holes have been pre-drilled in casing). When moved, tuck the wiring harness behind the clip provided to keep extra wire lengths out of the way.
NOTE: Proper polarity must be maintained for 115-v wiring. If polarity is incorrect, control board fault code indicator light will flash rapidly and the furnace will not operate.
B.24-v Wiring
Make field 24-v connections at the 24-v terminal strip. (See Fig. 9.) Connect terminal Y as shown in Fig. 8 for proper cooling operation. Use only AWG No. 18, color-coded, copper thermostat wire.
The 24-v circuit contains an automotive-type, 3-amp fuse located on the main control board. Any direct shorts during installation, service, or maintenance could cause this fuse to blow. If fuse replacement is required, use ONLY a 3-amp fuse of identical size.
C.Accessories
1.Electronic Air Cleaner (EAC)
Two spring clamp terminals (for 12 gage maximum, solid or stranded wire), marked EAC-1 and EAC-2 are provided for EAC connection. (See Fig. 9.) These terminals are energized with 115-v, (1-amp maximum) during blower motor operation. To connect EAC power leads to furnace control center, strip approximately 1/8 in. of insulation from wire. Open terminal by depressing switch arm with a screwdriver or finger, and insert wire as shown in Fig. 10.
2.Humidifier (HUM)
Screw terminals (HUM and Com) are provided for 24-v humidifier connection. The terminals are energized with 24-v 0.5-amp maximum after inducer motor prepurge period.
NOTE: A field-supplied, 115-v controlled relay connected to EAC terminals may be added if humidifier operation is desired during blower operation.
VII. VENTING
→Refer to the National or Local Installation Code such as; National Fuel Gas Code Z223.1-1992, or the Canadian Installation Code, CAN B149.1- and .2-M95, for proper vent sizing and installation requirements. Use the enclosed Venting Tables for Category I Fan-Assisted Furnaces for a quick, easy reference. The horizontal portion of the venting system shall maintain a minimum of 1/4-in. upward slope per linear ft and it shall be rigidly supported every 5 ft or less with hangers or straps to ensure that there will be no movement after installation.
VIII. START-UP, ADJUSTMENT, AND SAFETY CHECK
A.General
NOTE: Proper polarity must be maintained for 115-v wiring. If polarity is incorrect, control board fault indicator light will flash rapidly and furnace will not operate.
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