Table of Contents
Advertisement
E 2006 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other ap-
pliance.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
10/09
*2P1009*
INSTALLATION
INSTRUCTIONS
G50DF(X) Series
GAS FURNACE
505,255M
10/2009
Supersedes 05/2009
Table of Contents
Service
WARNING
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exact-
ly could result in serious injury, death,
or property damage.
WHAT TO DO IF YOU SMELL GAS:
D Do not try to light any appliance.
D Do not touch any electrical switch; do not
use any phone in your building.
D Leave the building immediately.
D Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
D If you cannot reach your gas supplier, call
the fire department.
Page 1
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
®
®
*P505255M*
Litho U.S.A.
2
3
4
4
4
5
. . . . . . . . . . .
5
. . . . . . . . . . . . .
6
9
10
11
11
11
19
20
24
25
26
26
27
28
30
30
. . . .
31
. . . . . . . . . . . . . . .
32
. . . . . .
35
505,255M
Advertisement
Table of Contents
Related Manuals for Lennox G50DF(X)?24A?045
Summary of Contents for Lennox G50DF(X)?24A?045
-
Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS E 2006 Lennox Industries Inc. Dallas, Texas, USA G50DF(X) Series GAS FURNACE 505,255M 10/2009 Supersedes 05/2009 Litho U.S.A. Table of Contents G50DF(X) Unit Dimensions ..... . . -
Page 2: G50Df(X) Unit Dimensions
G50DF(X) Unit Dimensions − inches (mm) 3−3/4 (95) 5/8 (16) RETURN AIR OPENING FLUE OUTLET 19−1/2 (Top) (16) (495) 5/8 (16) TOP VIEW 28−1/2 (724) 19−1/2 (16) (16) (495) AIR FLOW (1016) ELECTRICAL INLET (Either Side) 4−7/8 (124) Right GAS PIPING INLET 2−1/4 (57) Left (Either Side) 9−1/4... -
Page 3: G50Df(X) Parts Arrangement
G50DF(X) Parts Arrangement Blower Assembly Internal Flue Pipe Assembly Blower Motor Gasket Capacitor Transformer Flue Chase Door Interlock Switch Gasket Integrated Ignition Control Board Primary Flue Box Gasket Limit Heat Exchanger Flame Rollout Flame Switches Flue Collector Box Sensor Burner Gasket Gas Valve Combustion... -
Page 4: G50Df(X) Gas Furnace
In the USA, installation of gas furnaces must conform with G50DF(X) Gas Furnace local building codes. In the absence of local codes, units must be installed according to the current National Fuel The G50DF(X) gas furnace is shipped ready for installa- Gas Code (ANSI-Z223.1/NFPA 54). -
Page 5: General
Use of Furnace as Construction Heater General Lennox does not recommend the use of G50DF(X) units as These instructions are intended as a general guide and do a construction heater during any phase of construction. not supersede local codes in any way. Consult authorities Very low return air temperatures, harmful vapors and op- having jurisdiction before installation. -
Page 6: Combustion, Dilution, & Ventilation Air
Water softening chemicals De-icing salts or chemicals supervisor. Carbon tetrachloride Lennox Industries Inc. Halogen type refrigerants P.O. Box 799900 Cleaning solvents (such as perchloroethylene) Dallas, TX 75379−9900 Printing inks, paint removers, varnishes, etc. - Page 7 infiltration. If the furnace is located in a building of tight Air from Inside construction with weather stripping and caulking around If the confined space that houses the furnace adjoins a the windows and doors, follow the procedures in the air space categorized as unconfined, air can be brought in by from outside section.
- Page 8 EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE (Inlet Air from Crawlspace and Outlet Air to Ventilated Attic) CHIMNEY OR GAS VENT VENTILATION LOUVERS (Each end of attic) OUTLET WATER FURNACE HEATER INLET VENTILATION LOUVERS (For unheated crawl space) NOTE−The inlet and outlet air openings shall each have a free area of at least one square inch (645 ) per 4,000 Btu (1.17 kW) per hour of the total input rating of all equipment in the enclosure.
-
Page 9: Downflow Installation
TABLE 2 Downflow Installation ADDITIVE BASE FLOOR OPENING SIZE Downflow unit installs in three ways: on non−combustible Front to Rear Side to Side flooring, on combustible flooring using an additive base, or Model No. on a reverse−flow cooling cabinet. Do not drag the unit across the floor. -
Page 10: Setting Equipment
Return Air Opening −− Downflow Units NOTE − 1/3 hp blower motors are equipped with four flex- ible mounting legs, and 1/2 hp blower motors are equipped The following steps should be taken when installing ple- num: with three flexible legs and one rigid leg. The rigid leg is 1 −... -
Page 11: Filters
Return Air Plenum WARNING NOTE − Return air must not be drawn from a room where this furnace, or any other gas−fueled ap- Improper installation of the furnace can result in per- sonal injury or death. Combustion and flue products pliance (i.e., water heater), or carbon monoxide−... - Page 12 If the existing chimney will not accommodate a B1 vent or WARNING an insulated flexible vent pipe liner, either the chimney must be rebuilt to accommodate one of these liners or an Asphyxiation hazard. The exhaust vent for this fur- alternate approved venting method must be found.
- Page 13 Common Venting Using Tile−Lined Interior Masonry Chimney and Combined Vent Connector MINIMUM LENGTH = AS SHORT AS PRACTICAL. INTERIOR TILE−LINED FOR MAXIMUM LENGTH SEE NOTE TO LEFT MASONRY CHIMNEY NOTE− Refer to provided venting tables for installations in the USA and the venting tables in current CSA−B149 for installations in Canada.
- Page 14 6 − Single appliance venting configurations with zero lat- turer’s instructions. Joints between sections of single wall connector piping shall be fastened by screws or eral lengths (tables 5 and 6), are assumed to have no other approved means. elbows in the vent system. For all other vent configura- tions, the vent system is assumed to have two 90°...
- Page 15 TABLE 5 Capacity of Type B Double−Wall Vents with Type B Double−Wall Connectors Serving a Single Category I Appliance Vent and Connector Diameter − D (inches) Height Lateral 3 Inch 4 Inch 5 Inch 6 Inch Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet) NOTE −...
- Page 16 TABLE 6 Capacity of Type B Double−Wall Vents with Single−Wall Metal Connectors Serving a Single Category I Appliance Vent and Connector Diameter − D (inches) Height Lateral 3 Inch 4 Inch 5 Inch 6 Inch Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet) NOTE −...
- Page 17 TABLE 7 Vent Connector Capacity Type B Double−Wall Vents with Type B Double−Wall Connectors Serving Two or More Category I Appliances Vent and Connector Diameter − D (inches) Vent Connector 3 Inch 4 Inch 5 Inch 6 Inch Height Rise Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet)
- Page 18 TABLE 9 Vent Connector Capacity Type B Double−Wall Vents with Single−Wall Metal Connectors Serving Two or More Category I Appliances Vent and Connector Diameter − D (inches) Vent Connector 3 Inch 4 Inch 5 Inch 6 Inch Height Rise Appliance Input Rating in Thousands of Btu Per Hour (feet) (feet) TABLE 10...
-
Page 19: Gas Piping
Resize the common venting system to the minimum 3 − The gas piping must not run in or through air ducts, clothes chutes, gas vents or chimneys, dumb waiters, vent pipe size determined by using the appropriate or elevator shafts. tables in appendix G. -
Page 20: Electrical
Left Side Piping AUTOMATIC (Standard) GAS VALVE MANUAL MANUAL (with manual AUTOMATIC MAIN SHUT−OFF MAIN SHUT−OFF shut−off valve) GAS VALVE VALVE VALVE (with manual (With 1/8 in. NPT (With 1/8 in. NPT shut−off valve) Plugged Tap Plugged Tap Shown) Shown) GROUND JOINT GROUND... - Page 21 One line voltage EAC" terminal is provided on the fur- INTERIOR MAKE−UP BOX INSTALLATION nace control board. Any electronic air cleaner rated up to one amp can be connected to this terminal with the neutral leg of the circuit being connected to any of the NEUTRAL"...
- Page 22 TYPICAL G50DF(X) FIELD WIRING DIAGRAM FIELD INSTALLED CLASS II 24V FIELD INSTALLED LINE VOLTAGE FIGURE 19 ® SURELIGHT INTEGRATED CONTROL BOARD TERMINAL DESIGNATIONS COOL Blower − Cooling Speed (120VAC) HEAT Blower − Heating Speed (120VAC) PARK Unused Blower (Not energized) Continuous Low Blower Speed Accessory Terminal (120VAC) XFMR...
- Page 23 G50DF(X) Schematic Wiring Diagram FIGURE 21 Page 23...
-
Page 24: Unit Start−Up
3 − Turn off all electrical power to the unit. Unit Start−Up 4 − This furnace is equipped with an ignition device which FOR YOUR SAFETY READ BEFORE LIGHTING automatically lights the burners. Do not try to light the burners by hand. 5 −... -
Page 25: Gas Pressure Adjustment
8 − Honeywell VR8205 Gas Valve with ON/OFF Switch Gas Pressure Adjustment − Move gas valve switch to ON. See figure 22. Gas Flow (Approximate) Honeywell VR8205 Gas Valve with Control Knob − 1 − Operate unit at least 15 minutes before checking gas Turn knob on gas valve counterclockwise to ON. -
Page 26: High Altitude Information
2 − After the line pressure has been checked and ad- the unit nameplate. Increase the blower speed to decrease justed, check the manifold pressure. A natural gas to the temperature. Decrease the blower speed to increase LP/propane gas changeover kit is required to convert the temperature rise. -
Page 27: Blower Performance
Blower Performance NOTE − All air data is measured external to unit with 1 in. cleanable filter (not furnished − field provided) in place. G50DF−24A−045 PERFORMANCE G50DF−36A−070 PERFORMANCE Air Volume / Watts at Different Blower Speeds Air Volume / Watts at Different Blower Speeds External External Medium−... - Page 28 Blower Performance G50DF−48C−110 PERFORMANCE G50DF−60D−135 PERFORMANCE Air Volume / Watts at Different Blower Speeds Air Volume / Watts at Different Blower Speeds External External Medium− Medium− Static Static Medium− Medium− High High High Pressure Pressure High in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts in.
- Page 29 Electronic Ignition WARNING ® The SureLight integrated control has an added feature of an internal Watchguard control. The feature serves as an The blower access panel must be securely in place automatic reset device for ignition control lockout caused when the blower and burners are operating. Gas by ignition failure.
- Page 30 G50DF(X) Internal Flue Pipe and Chase INSERTS (X models only) Unit Top Cap Internal Flue Pipe Flue Chase with Adaptor with Gaskets Screw (1) Internal Combustion NOx INSERT Flue Pipe Air Inducer Silicone Sealant FIGURE 27 12 −Insert the brush end of cable snake into the top of one of the heat exchanger openings.
-
Page 31: Repair Parts List
32 −Replace front access panels. Repair Parts List The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model number listed on the CSA International nameplate −− Example: G50DF(X)−24A−045−9. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier. -
Page 32: Surelight Integrated Control Diagnostic Codes
® SureLight Integrated Control Diagnostic Codes DIAGNOSTIC CODES Make sure to Identify LED’S Correctly. Refer to figure 20 for control board layout. LED #1 LED #2 DESCRIPTION Power on − Normal operation. SIMULTANEOUS SIMULTANEOUS Also signaled during cooling and continuous fan. SLOW FLASH SLOW FLASH SIMULTANEOUS... - Page 33 ® SureLight Control Troubleshooting: Heating Sequence of Operation ® SURELIGHT CONTROL HEATING SEQUENCE OF OPERATION NORMAL HEATING MODE ABNORMAL HEATING MODE POWER ON GAS VALVE OFF. COMBUSTION AIR INDUCER ON. INDOOR BLOWER ON. LED #1 ALTERNATING FAST FLASH CONTROL SELF−CHECK OKAY? LED#2 ALTERNATING FAST FLASH CHECK FOR BROKEN IGNITOR OR OPEN IGNITOR CIRCUIT...
-
Page 34: Surelight Control Troubleshooting
® SureLight Control Troubleshooting: Heating Sequence of Operation (Continued) NORMAL HEATING MODE ABNORMAL HEATING MODE 15-SECOND COMBUSTION AIR INDUCER PREPURGE INITIATED BY CLOSED PRESSURE SWITCH. IS VOLTAGE ABOVE 75 VOLTS? LEDS SIGNAL IGNITOR WARM-UP −− 20 SECONDS. ALTERNATING IS THERE A PROPER GROUND? FAST FLASH IS IGNITOR INTACT AND CONNECTED? 4-SECOND TRIAL FOR IGNITION. - Page 35 ® SureLight Control Troubleshooting: Cooling Sequence of Operation ® SURELIGHT CONTROL COOLING SEQUENCE OF OPERATION NORMAL COOLING MODE ABNORMAL COOLING MODE POWER ON IGNITION CONTROL MAIN POWER ON. GAS VALVE OFF. COMBUSTION AIR INDUCER OFF. INDOOR BLOWER OFF WITH NORMAL DELAY. CONTROL SELF DIAGNOSTIC CHECK.
-
Page 36: G50Df(X) Start−Up & Performance Check List
® SureLight Control Troubleshooting: Continuous Fan Sequence of Operation ® SURELIGHT CONTROL CONTINUOUS FAN SEQUENCE OF OPERATION LED: SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT SEQUENCE. MANUAL FAN SELECTION MADE AT THERMOSTAT. CONTROL (G) ENERGIZES INDOOR BLOWER AT FAN SPEED. EAC TERM. IS ENERGIZED. HUM TERM.