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INDEX OF FIGURES Page Number
1 Upflow Low Profile Furnace ................................................................................................4
2 Upflow/Horizontal Unit .........................................................................................................5
3 Downflow Unit .....................................................................................................................5
4 Horizontal Unit .....................................................................................................................5
Standing Pilot Burner and Hot Surface Igniter ....................................................................5
6 Heat Exchanger ...................................................................................................................6
7 Induced Draft Blower ...........................................................................................................6
8 lnshot Burners .....................................................................................................................6
9 Hot Surface Igniter ..............................................................................................................7
Direct Spark Igniter ..............................................................................................................
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11 Over Temperature Switches ................................................................................................ ?
12 Remote Flame Sensor .......................................................................................................7
13 Transformer.........................................................................................................................8
14 Pressure Switch .................................................................................................................
8
Gas Valve ...........................................................................................................................8
16 Return Air Cabinet .............................................................................................................22
17 Combustible Floor Base ...................................................................................................22
18 Base Plate ........................................................................................................................23
19 Base Plate Installation .......................................................................................................26
Dimensions: Upflow Models and Upflow/Horizontal Models in the Upflow Position .........27
21 Dimensions: Downflow Units .............................................................................................28
22 Dimensions: Horizontal Only Units and Upflow/Horizontal Units
in the Horizontal Position ................................................................................................29
23 Air from Heated Space ......................................................................................................31
24 Outside Air from Attic/Crawl Space ..................................................................................32
Outside Air Using a Horizontal Inlet
& Outlet ....................................................................32
26 National Fuel Gas Code Book ...........................................................................................33
27 Pre-Drilling Fan Collar .......................................................................................................33
28 Dedicated Venting Through Chimney with B-Vent ............................................................34
29 Typical Venting with "B-Vent" ............................................................................................35
Power Venter Installation .................................................................................................36
31 Electronic Combustible Gas Detector ..............................................................................37
32 Gas Pipe Installation ........................................................................................................37
33 Installation of 100 Ohm, 10 Watt Resistor for Heat Anticipator .........................................39
34 Isolation Relay ...................................................................................................................40
Pilot Positioning ................................................................................................................42
36 Electronic Ignition Gas Valve ...........................................................................................43
37 Honeywell Twinning Connections ....................................................................................43
38 UTEC Single Stage Twinning ...........................................................................................44
39 UTEC Two Stage Twinning ..............................................................................................44
Fossil Fuel Kit Plenum Switch ..........................................................................................
48
41 RXMD-CO2 Wiring Schematic .........................................................................................50
42 Resizing Filters and Frame ...............................................................................................51
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43 Filter Retaining Rods .........................................................................................................52
44 Downflow Filter lnstallation
................................................................................................52
Horizontal Filter Installation ...............................................................................................52
46 Upflow Bottom Mount RXGF-CB .......................................................................................53
47 Upflow Side Mount RXGF-CA ...........................................................................................53
48 Downflow Top Mount RXGF-CC .......................................................................................53
49 Test Equipment .................................................................................................................55
Fan Control Board .............................................................................................................58
51 Blower
Off Settings - Robertshaw Standing Pilot .............................................................58
52 Blower
Off Settings - Honeywell Standing Pilot... .............................................................58
53 Standing Pilot Control Troubleshooting Guide ..................................................................59
54 Accessory (Baby) Board ....................................................................................................60
Accessory Board Installation - Robertshaw Control .........................................................60
56 Accessory Board Installation - Honeywell Control. ...........................................................60
57 UTEC Integrated Circuit Board ..........................................................................................62
58 Twinning Jumper Plug .......................................................................................................63
59 Honeywell Circuit Board ....................................................................................................64
Blower
Off Setting - Honeywell Integrated Circuit ............................................................66
61 Blower Off Setting - UTEC Integrated Circuit ...................................................................66
62 Equipment Test Connections ............................................................................................67
63 Switch Box .........................................................................................................................68
64 lnshot Burner Bracket.. ......................................................................................................69
Sensor Bracket Mounting ..................................................................................................69
66 Flame Sensor Mounting ....................................................................................................69
67 Disconnect Hot Surface lgniter ..........................................................................................70
68 Measure Voltage at 2-Pin MolexCap for 110-120 Volts ................................................... 70
69 Measure Voltage from First Pin to Chassis Ground ..........................................................70
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I
Measure Voltage from Second Pin to Chassis Ground ..................................................... 70
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71 Location of Wire Splice ......................................................................................................71
72 Measure Flame Sense Current Using Flame Sensing Current Switch Box ......................71
73 Flame Sensor ....................................................................................................................72
74 Factory Installed Flame Sensor .........................................................................................72
Remote Flame Sensor Installation ....................................................................................74
76 Present UTEC and Honeywell Integrated Furnace Controls .............................................75
77 UTEC LED's ......................................................................................................................76
78 Honeywell LED's ...............................................................................................................76
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