3
Autostaging for Single Stage Thermostats .............26
Autostaging for Two-Stage Thermostats .................27
Heat
Anticipator
......................................................27
Dehumidifi
cation
Options
.......................................27
Blower Speed Confi guration ...................................27
Fixed Speed Blower Applications .......................27
Variable Speed Blower Applications ...................27
START-UP & ADJUSTMENTS ...................................28
Pre-Start
Checklist..................................................28
Start-Up
Procedures
...............................................28
Verifying & Adjusting Input Rate .............................28
Verifying & Adjusting Temperature Rise .................28
Verifying Burner Operation .....................................29
Verifying Operation of the Supply Air
Limit
Switch
............................................................29
OPERATING SEQUENCE .........................................29
Heating
Cycle
.........................................................29
Cooling
Cycle
.........................................................30
Fan
Mode
................................................................30
DESCRIPTION OF COMPONENTS ..........................30
MAINTENANCE .........................................................30
Air Filters ................................................................31
Blower
Compartment
..............................................31
Cleaning of Burners ................................................31
Heat Exchanger & Burner Maintenance .................31
Lubrication ..............................................................31
Vent
System
...........................................................31
TROUBLESHOOTING ...............................................32
FIGURES & TABLES .................................................33
Figure 28 - Furnace Dimensions ........................33
Airfl
ow
Data
...........................................................34
Table 8 - Heating / Cooling Airfl ows &
Temperature Rises - Fixed Speed .......34
Table 9 - Nominal CFM & Temperature Rises -
Variable
Speed
.....................................35
Table 10 - Nominal Cooling / Heat Pump CFM -
Variable
Speed
.....................................36
Gas Information .....................................................37
Table 11 - Gas Flow Rates .................................37
Table 12 - Gas Pipe Capacities ..........................37
Table 13 - High Altitude Deration Chart for
Propane
Gas
.....................................38
Table 14 - Natural Gas Heating Values ..............38
Table 15 - High Altitude Deration Chart for
Nat. Gas - High Heating Value ...........39
Table 16 - High Altitude Deration Chart for
Nat. Gas - Low Heating Value ...........39
Electrical
Information
.............................................40
Figure 29 - Two-Stage Fixed Speed Motor
Control
Board
....................................40
Figure 30 - Two-Stage Variable Speed
Motor Control Board ..........................40
Figure 31 - Two-Stage Furnace Control Board ....40
Figure 32 - Wiring Diagram - Two Stage Fixed
Speed Upfl ow / Horiz. Furnaces .......41
Figure 33 - Wiring Diagram - Two Stage Fixed
Speed Downfl ow Furnaces ...............42
Figure 34 - Wiring Diagram - Two Stage Variable
Speed Upfl ow / Horiz. Furnaces .......43
Figure 35 - Wiring Diagram - Two Stage Variable
Speed Downfl ow Furnaces ...............44
Venting
Information
.................................................45
Table 17 - Vent Termination Clearances .............45
Figure 36 - Horizontal & Vertical Venting ............46
Figure 37 - Upfl ow Options .................................47
Figure 38 - Horizontal Options ..........................48
Figure 39 - Downfl ow Options ............................49
Location of Furnace Components .........................50
Figure 40 - Furnace Components ....................50
INSTALLATION / PERFORMANCE CHECKLIST .....52
Summary of Contents for *TC
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