Page 2 - Table of Contents
22 TO THE INSTALLER Before installing this unit please read this manual and the Specification Sheet tofamiliarize yourself on the specific items which must be adhered to such asmaximum external static pressure to unit, air temperature rise, minimum ormaximum CFM and motor speed connections. TO THE O...
Page 4 - Safety Instructions
44 WARNING If the information in these instructions is not followed exactly, fire or explosion may resultcausing 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 ...
Page 6 - Shipping and Handling; Original or certified copy of the Bill of Lading, or indemnity bond.; Product Application; must; General Information
66 Shipping and Handling All units are securely packed in shipping containers tested according to International Safe Transit Associationspecifications. The carton must be checked upon arrival for external damage. If damage is found, a request for inspectionby carrier’s agent must be made in writing ...
Page 7 - American National Standards Institute; Batterymarch Park; CSA International; 78 Rexdale Boulevard
77 WARNING Possible death, personal injury or property damage due to fire, explosion, smoke, soot, condensation, electricalshock or carbon monoxide may result from improper installation, repair, operation, or maintenance of this product. WARNING To prevent death, personal injury or property damage d...
Page 8 - WARNING; Location Requirements and Considerations; Combustion and Ventilation Air Requirements.
88 WARNING To prevent possible death, personal injury, equipment damage, or property damage the following bullet points mustbe observed when installing the unit. Location Requirements and Considerations General Information Follow the instructions listed below when selecting a furnace location. Refer...
Page 9 - Suspended Furnace; Existing Furnace Removal; The following vent testing procedure is reproduced from the; Thermostat Requirements; Electrical; Thermostat Location; Thermostat Influences
99 F URNACE S USPENSION If suspending the furnace from rafters or joist, use 3/8"threaded rod and 2”x2”x1/8” angle iron as shown below.The length of rod will depend on the application and theclearances necessary. TILT OUTWARD TO ALLOWFOR DOOR AND CIRCULATOR BLOWER REMOVAL 3/8" DIAMETER THREA...
Page 10 - Combustion and Ventilation Air Requirements; N a t i o n a l F u e l G a s C o d e
10 10 Combustion and Ventilation Air Requirements (d) In addition to air needed for combustion, air shall be supplied for ventilation, including all air required for comfort and properworking conditions for personnel. (e) While all forms of building construction cannot be covered in detail, air for ...
Page 12 - Equipment Located in Confined Spaces All Air; Special Conditions Created by Mechanical Exhausting or
12 12 Furnace Water Heater Opening Chimney or Gas Vent NOTE: The single opening must havea free area of not less than one square inch per 3000 BTU of the total input rating of all equip-ment in the enclosure, but not less than the sum of the areas of all ventconnectors in the confined space. Alterna...
Page 13 - NOTE: Single stage gas furnaces with induced draft; MODEL
13 13 WARNING To prevent possible death or personal injury due to asphyxiation, this Non-Condensing Gas Fired Warm AirFurnace must be Category I vented. Do not vent using Category III venting. Category I Venting is venting at a non-positive pressure. A furnace vented as Category I is considered a fa...
Page 14 - Upflow Upright or Horizontal units; Upflow Rotated Induced Draft Blower; Blower Assembly; Electrical Connections
14 14 Category I Venting (Vertical Venting) I NDUCED D RAFT B LOWER R ELOCATION Upflow Upright or Horizontal units are shipped with the induced draft blower discharging from the top of the fur-nace. (“Top” is as viewed for an upflow installation.) Theinduced draft blower can be rotated 90 degrees co...
Page 15 - Right To Left Installation; Rollout Switch Relocation
15 15 WARNING To prevent death, personal injury or property damage due to fire or explosion, a qualified servicer must determinethe reason the rollout protection device opened before the device is reset. R OLLOUT P ROTECTION D EVICE R ELOCATION Furnaces installed horizontal right-to-left airflow, re...
Page 16 - Wiring Harness; CAUTION; box to the right side of the furnace.
16 16 Electrical Connections WARNING To avoid the risk of electrical shock, wiring to the unit must be properly polarized and grounded. WARNING To avoid electrical shock, injury or death, disconnect electrical power before servicing or changing any electricalwiring. CAUTION Label all wires prior to ...
Page 17 - “Integrated Ignition Control”; NOTE: Do not use gas piping as an electrical ground.; Single-Stage Heating with Single-Stage Cooling
17 17 6. Rotate the junction box 180 degrees so the access panel continues to face forward. The open snapbushing should now be on the left. 7. Attach pressure switch bracket to left side of furnace where the junction box was using the screws savedin Step 4. The “L” bracket must point toward thefront...
Page 18 - Two-Stage Heating with Single-Stage Cooling; Thermostat Diagrams; “Accessories Wiring”; Control Module; Accessories Wiring
18 18 W1 G Y Two-Stage Heating with Single-Stage Cooling R W2 B/C G R W1 W2 O YL O Y D EHU M TW IN Y C NEU HOT Furnace Integrated Control Module Thermostat Two-Stage Heating with Single-Stage Cooling ( ) Remote Condensing Unit (Single-Stage Cooling) Dehum idistat [Optional] G Y Two-Stage Heating wit...
Page 19 - Proper Piping Practice; This unit is factory set to operate on; natural gas; at the altitudes shown on the rating plate. The plate; DO NOT VARY FROM THE MINIMUM SUPPLY PRESSURE GIVEN IN TABLE 1.; Doing so could create ignition problems.; DO NOT EXCEED THE RATED INPUT SHOWN ON THE RATING PLATE.; Gas Supply and Piping; Inlet Gas Pressure; Natural; Table 1; Table 2
19 19 Proper Piping Practice The gas line installation must comply with local codes, or in the absence of local codes, with the latest edition of theNational Fuel Gas Code NFPA 54/ANSI Z223.1. IMPORTANT NOTE: This unit is factory set to operate on natural gas at the altitudes shown on the rating pla...
Page 20 - High Altitude Derate; not; content of the derated; Gas Piping Connections; Use pipe joint compound on male threads only. Pipe
20 20 Gas Supply and Piping High Altitude Derate When this furnace is installed at high altitude, the appropriate High Altitude orifice kit must be applied. This is required dueto the natural reduction in the density of both the gas fuel and combustion air as altitude increases. The kit will provide...
Page 21 - Inlet Piping; Gas Inlet Through Furnace Right Side; Gas Inlet Through Furnace Left Side
21 21 9. The unit must be connected to the building piping by one of the following methods: • Rigid metallic pipe and fittings • Semirigid metallic tubing and metallic fittings (Alumi- num alloy tubing must not be used in exterior loca- tions) • Listed gas appliance connectors used in accor- dance w...
Page 22 - Gas Piping Checks
22 22 Gas Piping Checks WARNING To avoid the possibility of explosion or fire, never use a match or open flame to test for leaks. CAUTION To prevent personal injury or property damage due to fire, the following instructions must be performed regardinggas connections, pressure testing, location of sh...
Page 23 - Propane Gas Tanks and Piping; PERSONAL INJURY HAZARD
23 23 Propane Gas Tanks and Piping WARNING PERSONAL INJURY HAZARD To prevent death, personal injury, or property damage due to fire or explosion from a propane gas leak, install agas detecting warning device. A gas detecting warning device is the only reliable way to detect a propane gasleak. Do not...
Page 24 - Sizing Between Single or Second Stage Regulator and Appliance*; *Data in accordance with NFPA pamphlet NO. 54; Sizing Between First and Second Stage Regulator*; Pipe or
24 24 Propane Gas Tanks and Piping Sizing Between Single or Second Stage Regulator and Appliance* Maximum Propane Capacities Listed are Based on 1/2" W .C. pressure drop at 11" W .C. setting. Capacities in 1,000 BTU/hour. Pipe or Nominal Pipe Size Tubing Tubing Size, O.D. Type L Schedule 40 ...
Page 25 - Ductwork Sizing; NOTE: Ductwork must; Filters; Possible Filter Locations; Horizontal Installations; Circulating Air and Filters
25 25 Ductwork Sizing Duct systems and register sizes must be properly de-signed for the CFM and external static pressure rating ofthe furnace. Ductwork should be designed in accordancewith the recommended methods of “Air ConditioningContractors of America” Manual D.A duct system must be installed i...
Page 26 - Startup Adjustments and Measurements; Furnace Operation
26 26 Furnace must have a 115 VAC power supply properly connected and grounded. Proper polarity must be maintained forcorrect operation. An interlock switch prevents furnace operation if the blower door is not in place. Keep the blower accessdoor in place except for inspection and maintenance.This f...
Page 27 - Measure Gas Supply Pressure; Measuring Inlet Gas Pressure; Measure and Adjust Gas Manifold Pressure; Range; Manifold Gas Pressure
27 27 Measure Gas Supply Pressure CAUTION To prevent unreliable operation or equipmentdamage, the inlet gas supply pressure must be asspecified on the unit rating plate with all otherhousehold gas fired appliances operating. The line pressure supplied to the gas valve must be withinthe range specifi...
Page 28 - Adjust Circulator Blower; Temperature Rise Measurement
28 28 6. Turn the adjustment screw clockwise to increase the pressure, or counterclockwise to decrease the pres-sure. 7. Securely replace the regulator cap.8. Turn OFF gas to furnace at the manual shutoff valve and disconnect manometer. 9. Reinstall gas valve outlet pressure tap plug before turning ...
Page 29 - Adjust Circulator Blower Speeds; Startup Procedure and Adjustment
29 29 Adjust Circulator Blower Speeds WARNING To avoid death or personal injury due to electricalshock, turn off power to the furnace before changingspeed taps. All furnaces are shipped with heating speed set at “B” andcooling speed set at “D”. Use the following procedure toselect the heating and co...
Page 30 - Adjust Blower Heat Off Delay; Heat Off Delay Switches
30 30 OFF OFF 8 7 4 3 2 1 OFF ON 8 7 4 3 2 1 ON OFF 8 7 4 3 2 1 ON ON 8 7 4 3 2 1 Cooling Speed Tap A Cooling Speed Tap B Cooling Speed Tap C Cooling Speed Tap D * Cooling Speed Taps ( * indicates factory setting) OFF OFF 8 7 4 3 2 1 OFF ON 8 7 4 3 2 1 ON OFF 8 7 4 3 2 1 ON ON 8 7 4 3 2 1 Heating Sp...
Page 31 - Normal Sequence of Operation; Power Up; balance
31 31 Normal Sequence of Operation Power Up The normal power up sequence is as follows: • 115 VAC power applied to furnace.• Integrated control module performs internal checks.• Integrated control module flashes LED one time.• Integrated control module monitors safety circuits continuously.• Furnace...
Page 33 - Timing Charts For Normal Heating Operation; Example 1: Continuous Call For Low Stage Heat Only
33 33 0 10 30 33 34 64 94 0 15 30 60, 90 90, 120, 120, or 150, or 180 210 CirculatorBlower Gas Valve Igniter PressureSwitches Induced DraftBlower Thermostat High Low Off On Off On Off PS2 ClosedPS1 Closed Open High Low Off High Low Off Timing Charts For Normal Heating Operation Example 1: Continuous...
Page 34 - Timing Charts for Normal Heating Operation
34 34 Example 4: Initial Call For High Heat, Subsequent Call To Low Heat Example 3: Initial Call For Low Heat, Change In Call To High Heat 0 10 30 33 34 64 94 0 15 30 60, 90 90, 120, 120, or 150, or 180 210 CirculatorBlower Gas Valve Igniter PressureSwitches Induced DraftBlower Thermostat High Low O...
Page 36 - Operational Checks; Auxiliary Limit; If it becomes necessary to slide the; Burner Flame
36 36 These checks establish that the primary limit control is functioning and will respond to a restriction in the return air, or acirculator blower failure. If the primary limit control does not function during this test, the cause must be determined andcorrected. WARNING To prevent personal injur...
Page 37 - High or Primary Limit; Primary Limit Control
37 37 High or Primary Limit The primary limit control guards against overheating re-sulting from insufficient conditioned air passing over theheat exchanger. If the primary limit control does notfunction during this test, the cause must be determined andcorrected. Function of this control should be ...
Page 38 - Safety Circuit Description
38 38 Safety Circuit Description A number of safety circuits are employed to ensure safe and proper furnace operation. These circuits serve to controlany potential safety hazards and serve as inputs in the monitoring and diagnosis of abnormal function. These circuitsare continuously monitored during...
Page 39 - Troubleshooting; Electrostatic Discharge (ESD) Precautions; during grounding will be discharged.; Furnace Lockout; Manual power interruption. Interrupt 115 volt power; section for aid in determining; Diagnostic Chart
39 39 Troubleshooting Electrostatic Discharge (ESD) Precautions NOTE: Discharge body’s static electricity before touching unit. An electrostatic discharge can adversely affectelectrical components. Use the following precautions during furnace installation and servicing to protect the integrated igni...
Page 40 - Troubleshooting Chart
40 • Turn power OFF prior to repair. • Igniter is fragile, handle with care. • Sand flame sensor with emery cloth. • See “Vent/Flue Pipe” section for pipingdetails. • Turn power OFF prior to repair. • Replace pressure switch with properreplacement part. • Turn power OFF prior to repair. • Replace pr...
Page 42 - internal to the furnace.; Maintenance
42 42 WARNING To avoid electrical shock, injury or death, disconnect electrical power before performing any maintenance. If you must handle the igniter, handle with care. Touching the igniter element with bare fingers, rough handling, orvibration could damage the igniter resulting in premature failu...
Page 43 - it from under the front lip of the furnace basepan.; rail; Filter Removal Procedure
43 43 F ILTER R EMOVAL Depending on the installation, differing filter arrangementscan be applied. Filters can be installed in the central returnregister, the bottom of the blower compartment, or a sidepanel external filter rack kit. A media air filter or electronicair cleaner can be used as an alte...
Page 44 - Burners; Startup
44 44 Maintenance Burners Visually inspect the burner flames periodically during theheating season. Turn on the furnace at the thermostat andallow several minutes for flames to stabilize, since anydislodged dust will alter the flames normal appearance.Flames should be stable, quiet, soft, and blue (...
Page 45 - is a trademark of Maytag World-
45 45 Before Leaving an Installation • Cycle the furnace with the thermostat at least three times. Verify cooling and fan only operation. • Review the Owner’s Manual with the homeowner and discuss proper furnace operation and maintenance. • Leave literature packet near furnace. Repair and Replacemen...
