Table of Contents
Advertisement
GAS FURNACE SAFETY PRECAUTIONS ....................................3
Electrostatic Discharge (ESD) Precautions..................................4
PRODUCT DESCRIPTION AND APPLICATION ..........................4
Shipping Inspection .....................................................................4
To The Installer.............................................................................4
Component Identification.............................................................5
Product Application......................................................................5
LOCATION REQUIREMENTS AND CONSIDERATIONS ............6
Clearances and Accessibility .......................................................7
Furnace Suspension ....................................................................8
Existing Furnace Removal ...........................................................8
Thermostat Location ....................................................................8
INSTALLATION POSITIONS.......................................................11
General .......................................................................................11
Drain Trap and Lines ..................................................................11
Leveling ......................................................................................11
Alternate Vent/Flue Connections ...............................................11
Alternate Electrical and Gas Line Connections .........................13
Drain Pan....................................................................................13
Freeze Protection .......................................................................13
Furnace Suspension ..................................................................13
PROPANE GAS/HIGH ALTITUDE INSTALLATIONS .................13
VENT/FLUE PIPE AND COMBUSTION AIR PIPE......................13
General .......................................................................................13
Dual Certification: Nondirect/Direct Vent...................................14
Materials and Joining Methods..................................................14
Proper Vent/Flue and Combustion Air Piping Practices ...........14
Termination Locations................................................................14
Canadian Venting Requirements ...............................................15
Standard Furnace Connections.................................................15
Vent/Flue Pipe ............................................................................15
Combustion Air Pipe-Direct Vent Installations ........................15
Combustion Air Pipe-Nondirect Vent Installations..................16
Alternate Furnace Connections .................................................16
Alternate Vent/Flue Location......................................................16
Nondirect Vent (Single Pipe) Piping...........................................18
Vent/Flue Pipe Lengths and Diameters .....................................18
Vent/Flue Pipe Terminations ......................................................18
Direct Vent (Dual Pipe) Piping ....................................................19
Vent/Flue and Combustion Air Pipe Terminations ....................20
Direct Vent Furnaces..................................................................21
Concentric Vent Termination .....................................................22
Side Wall Vent Kit.......................................................................22
CONDENSATE DRAIN LINES AND DRAIN TRAP .....................22
Standard Right or Left Side Drain Hose Connections...............22
Upright Installations-Trap on Right Side .................................22
Upright Installations-Trap on Left Side....................................23
Upright Drain Trap Mounting-Left or Right Side Panel ...........24
Horizontal Installations-Right Side Down................................24
Horizontal Installations-Left Side Down ..................................24
ELECTRICAL CONNECTIONS ....................................................25
Wiring Harness ...........................................................................25
115-Volt Line Connections.........................................................25
Junction Box Relocation............................................................26
24-Volt Thermostat Wiring .........................................................26
WFM19 Furnace with 2-Stage Condenser Field Wiring............26
Electronic Air Cleaner)................................................................27
2
TABLE OF CONTENTS
GAS SUPPLY AND PIPING..........................................................28
High Altitude Derate ...................................................................28
Propane Gas Conversion ...........................................................28
Gas Control Valve.......................................................................28
Gas Piping Connections ............................................................28
Gas Piping Checks.....................................................................31
Propane Gas Tanks and Piping .................................................31
CIRCULATING AIR AND FILTERS ..............................................32
Ductwork-Airflow .....................................................................32
Checking Duct Static .................................................................33
Bottom Return Air Opening-Upflow Models] ..........................33
Ductwork ....................................................................................33
START-UP PROCEDURE AND ADJUSTMENT .........................35
Heat Anticipator Setting .............................................................35
Drain Trap Priming......................................................................35
Furnace Operation......................................................................35
Furnace Start-Up........................................................................35
Furnace Shutdown .....................................................................35
Gas Supply Pressure Measurement ..........................................35
Gas Manifold Pressure Measurement and Adjustment.............37
Gas Input Rate Measurement-Natural Gas Only.....................37
Temperature Rise .......................................................................37
Circulator Blower Speeds ..........................................................38
NORMAL SEQUENCE OF OPERATION .....................................38
Power Up....................................................................................38
Cooling Mode .............................................................................39
Fan Only Mode ...........................................................................39
Operational Checks....................................................................39
SAFETY CIRCUIT DESCRIPTION ...............................................40
General .......................................................................................40
Integrated Control Module .........................................................40
Primary Limit Control..................................................................40
Auxiliary Limit Control(s).............................................................40
Rollout Limit Control(s)...............................................................40
Pressure Switches......................................................................40
Flame Sensor..............................................................................40
MAINTENANCE ............................................................................40
Annual Inspection.......................................................................40
Filters ..........................................................................................40
Burners .......................................................................................41
Induced Draft and Circulator Blowers........................................41
Flame Sensor (Qualified Servicer Only)......................................41
Igniter (Qualified Servicer Only)..................................................41
Flue Passages (Qualified Servicer Only) ....................................41
Before Leaving an Installation....................................................42
Repair and Replacement Parts ..................................................42
TROUBLESHOOTING ..................................................................42
Electrostatic Discharge (ESD) Precautions................................42
Fault Recall .................................................................................42
Resetting from Lockout..............................................................42
Diagnostic Chart.........................................................................43
BLOWER PERFORMANCE DATA...............................................46
WGFM195090S5C.........................................................................49
WIRING DIAGRAM-ALL WFM19...............................................51
ASSISTANCE OR SERVICE .........................................................52
- Quick Links:
- Repair and Replacement Parts
Hide quick links:
Advertisement
Table of Contents
