NOTE: Before proceeding with the next check, turn OFF the electrical power supply to the unit. Remove the control access door. ( ) During the heating season, check the control dial on the gas valve. Is it in the ON position? If it is not, be sure it has not been turned off for safety reasons. If no safety hazards are present, follow the start-up procedures in this manual. ( ) If your unit still fails to operate, call your servicing dealer for troubleshooting and repairs. Specify the model and se

The inducer motor should run but the burner will not ignite. Allow inducer motor to run for 4 to 5 hours. Reconnect red wire to terminal 2 at IGN and remove R-W jumper at the-control voltage terminal board. Proceed as follows to complete heating section start-up. Follow the lighting instructions on the heating section operation label (located inside the burner access door) to start the heating section. When lighting the unit for the first time, perform the following: If the gas supply pipe wa

OFM RLA — — Outdoor (Condenser) Fan Motor Rated Load Amps 44 Table 12 — Electrical Data, 48ZG,ZN060 Units NOMINAL VOLTAGE (3 Ph 60 Hz) VOLTAGE RANGE COMPR NO. 1 COMPR NO. 2 OFM IFM BASE UNIT ONLY EXHAUST FAN BASE UNIT WITH EXHAUST FAN RLA LRA RLA LRA Total FLA Hp FLA MCA MOCP Total Hp Total FLA MCA MOCP 208/230 187-254 108 506 108 506 26.4 15 46.2/42 314.9/310.7 400/400 10 15 20 34/30 48/44 62/56 348.3/340.7 363.3/354.7 376.6/366.7 450/400 450/450 450/450 20 59.4/54 328.1/322.7 400/400 10 15 20

If gas valve is subjected to pressure greater than0.5 psig, it must be replaced. Optional Staged Gas Control — The 48Z030-105 large rooftop units may be ordered with an optional factory- installed staged gas control system that monitors heating operation of the rooftop. The control system is composed of severalcomponents as listed in sections below. Table 17 shows 48ZSeries staged gas implementation. Refer to the Unit Controls and Troubleshooting book for information on configuring staged gas co

Fig. 40 — Disconnect Location — Size 070-100 Units 36 TB1 21 11 22 12 2313DISCONNECT PER NEC EQUIP GND LEGEND EQUIP — Equipment GND — Ground NEC — National Electrical Code TB — Terminal Block Fig. 41 — Field Power Wiring Connections FACTORY-INSTALLED DISCONNECT HANDLE LOCATION FACTORY-INSTALLED DISCONNECT (HIDDEN) 23 13 12 11 22 21 DISCONNECT PER NEC FACTORY WIRE EQUIP GND FIELD WIRE LEGEND EQUIP — Equipment GND — Ground NEC — National Electrical Code Fig. 43 — Field Power Wiring Connections for

If you don't smell gas, go to the next step." • If a suspected malfunction occurs with your gas control system, such as the burners do not light when they should, refer to the shutdown procedures on inside of main furnace door, or in the "Shutting Down Your Furnace" section and call your dealer as soon as possible. FIRE AND EXPLOSION HAZARD Failure to follow this warning could result in personal iniury, death or property damage. Should the gas supply fail to shut off or if overheating occurs, tu

WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life. — Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. — WHAT TO DO IF YOU SMELL GAS • Do not try to light any appliance. • Do not touch any electrical switch; do not use any phone in your building. • Immediately call your gas supplier from a neighbor’s phone. Follow the gas suppl

Do this until stable operation is achieved. 12. Once satisfied with loop operation, remove all forced values which may have been initiated during this procedure. 13. Repeat Steps 1-12 until all loops have been checked. NOTE: For better tuning, the building supervisor or service tool should be used to adjust the proportional and integral terms. Contact your Carrier representative for more details. IAQ Control Loop Adjustment — The IAQ (indoor air quality) control loop is different from the other

certified for close clearance, “hide-a-way” installation. These units meet requirements for under-the-house warm air delivery for either concrete slab or crawl space construction. See Fig. 1 and Table 1 for furnace dimensions and physical data. See Table 2 for blower data. Table 1 — Dimensions and Physical Data FURNACE 58 BB BD MODEL O ' o _ CO o 120 080 100 125 150 SERIES 100,200,400,500 200,500 APPROX SHIP. WT (lb) 136L142 165 154 208 244 DIMENSIONS (in.) i Width A 16% 20

The pilot valve is held open by the “hold” device within gas valve GV. The main valve portion of gas valve GV has a delayed opening operator that opens within 6 to 15 seconds after it is energized, permitting gas flow to the main burners where the gas is ignited by pilot SP. 2. Honeywell VR 800A Gas Valve (Match-Lit Models). See Fig. 11 The furnace pilot must be lit to energize the thermal magnet circuit of gas valve GV, thus permitting gas flow to the remaining portion of the valve. When th