TABLE OF CONTACT INFORMATION ...............................1 SAFETY................................................1 INSTRUCTIONS FOR EXAMINING THE FURNACE INSTALLATION ................................2 START-UP AND SHUTDOWN INSTRUCTIONS ................3 HOW YOUR GAS FURNACE WORKS ......................3 OPERATING INSTRUCTIONS.............................4 TO TURN OFF THE APPLIANCE ..........................4 FURNACE MAINTENANCE - USER INFORMATION ............4 EXTERNAL AIR FILTERS

When you see this symbol on labels or in manuals, be alert to the potential for personal injury. Understand and pay particular attention to the signal words DANGER, WARNING, or CAUTION. DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or serious injury. WARNING indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury. CAUTION indicates a potentially hazardous situation, which, if not avoided may

ID MODELS LO COMP Single Stage Compressor (OUT) O Reversing Valve Energized in Cool HI COMP Second Stage Compressor (OUT) TWO STAGE AIR CONDITIONER C 24 – Volt Common R 24 – Volt Hot Y1 First Stage Compressor Y2 Second Stage Compressor External Humidistat (Optional) Open on Humidity Rise 2 Part Number: S1-2HU16700124 2 TP(8,L)C YP(8,L)C CP(8,L)C LP(8,L)C FIGURE 21: Thermostat Chart - Two Stage Air Conditioner with Single Stage Thermostat – Variable Speed or PSC Modulating Furnace Johnson Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 START-UP AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . 22 DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 SAFETY CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 NORMAL OPERATION AND DIAGNOSTICS . . . . . . . . . . . . . 29 GAS PIPING . . .

. .24 Double Vertical Combustion Air Intake and Vent Termination .....24 Direct Vent Air Intake Connection and Vent Connection .........25 Combustion Airflow Path Through The Furnace Casing .........25 Outside and Ambient Combustion Air........................26 Attic and Crawl Space Combustion Air Termination .............27 Gas Valve.............................................30 Reading Gas Pressure...................................30 Furnace Control Board............................

The equivalent length of the vent system is the total length of straight pipe PLUS the equivalent length of all of the elbows. The following rules must also be followed: 1. Long radius (sweep) elbows are recommended. Standard elbows may be used, but since they have a longer equivalent length, they will reduce the total length of pipe that will be allowed. Short radius (plumbing vent) elbows are not allowed. The standard dimensions of the acceptable elbows are shown below. 2. The maximum equiv

LO COMP Single Stage Compressor (OUT) O Reversing Valve Energized in Cool HI COMP Second Stage Compressor (OUT) Change Hot Heat Pump jumper on the heat pump control to “ON” if Hot Heat Pump Operation is desired. External Humidistat (Optional) Open on Humidity Rise 3 ID MODELS TM(8,L)M YM(8,L)M CM(8,L)M LM(8,L)M FIGURE 25: Thermostat Chart - Two Stage Heat Pump – Variable Speed or PSC Modulating Furnace Johnson Controls Unitary Products 368261-UIM-A-0508 18 Johnson Controls Unitary Products ACCES

Refer to “COMBUSTION AIR SOURCE FROM OUTDOORS and VENT AND SUPPLY AIR SAFETY CHECK” in these instructions for additional information and safety check procedure. 2. The duct shall be either metal, or a material meeting the class 1 requirements of CAN4-S110 Standard for Air Ducts. 3. The duct shall be least the same cross-sectional area as the free area of the air supply inlet opening to which it connects. 4. The duct shall terminate within 12 in (30.5 cm) above, and within 24 in (61 cm) horizonta

FIGURE 11: Typical Suspended Furnace / Crawl Space Installation For modulating furnaces to be used in the downflow position, it is necessary to rotate the gas valve so that it is upright when the furnace is installed. Loosen the pipe union between the gas valve and manifold, rotate the valve as far upward as it will go, and tighten the union. See Figure 13, "Downflow Installation - Gas Valve Rotation". Angle Iron Bracket 6” Min. Between Rod & Front of Furnace 1” Max. Between Rod & Back of Furnac

Theinstallationmustcomplywithregulationsoftheservinggassupplier, localbuilding, heating, plumbing, andothercodes. Inabsenceoflocalcodes, theinstallationmustcomplywithnationalcodesandallauthoritieshavingjurisdiction. B24.25” .56” .56” 20” 3” 23.8” .56” CombustionAirInlet2” DiameterVentConnectionOutletBDURINGINSTALLATION, DOORSMUSTREMAINONFURNACEWHENMOVINGORLIFTING. VentConnectionOutlet † Other airflows are available. see Tech Guide for all CFM options. * Cool Tap. ** Adjustment Tap. LED INDICATOR