A.O. Smith BTP-125-140 Replacement Parts List Manual page 7

Item Description
1 *Amplifier
Flame Rod Pilot, Green Amp (CR2-G-15) ........................... 5701
Scanner Pilot, Purple Amp (CR2-G-20) .............................. 5701-1
2 Arm, Crank ................................................................................. 5753
3 Arm, Damper .............................................................................. 5723-1
4 Arm, Steel Crank (Aluminum Hub Assembly
For Damper 5/16" ID) ........................................................... 5754
5 Arm, Steel Crank (Aluminum Hub Assembly
For Oil Valve or Butterfly 3/8" ID) ....................................... 5754-1
5A Arm, Steel Crank (Aluminum Hub Assembly
For Extension Shaft 1/2" ID) ............................................... 5754-2
6 Axle,Damper .............................................................................. 5725-1
8 Blade,Damper ............................................................................. 5726-1
Box, Complete Panel
9 Body,Panel Box .......................................................................... 5756
10 Bracket, Mounting
Integral ................................................................................. 5757
Remote Bottom ..................................................................... 5757-1
Remote Top .......................................................................... 5757-2
11 Door, Panel Box ......................................................................... 5758
12 Latch & Knob, Door ................................................................... 5736
13 *Plate, Chassis ........................................................................... 5759
14 Top, Panel Box Hinged .............................................................. 5760
15 Cock, Gas
CR2-G-15 ............................................................................. 5719-4
CR2-G-20 ............................................................................. 5719-5
17 Cock,PilotGas ............................................................................. 5720
18 *Control-Less Amplifier ............................................................. 5702-1
19 Gas Drawer
Straight Assembly ............................................................... 5763-3
Spinner Mounted Scanner .................................................. 5763-4
22 Spinner
Photocell ............................................................................... 5764
Scanner ............................................................................... 5764-1
23 Housing, Blower ........................................................................ 5721-1
24 *Light, Signal
Amber ................................................................................... 5728
White .................................................................................... 5728-1
25 Motor, Blower
CR2-G-15 (1/2 HP) .............................................................. 5705-2
CR2-G-20 (3/4 HP) .............................................................. 5705-4
26 Motor, Modulating & Bracket ..................................................... 5765
27 *Orifice, Side (2") ...................................................................... (SEE
CHART)
28 *Spring, Orifice .................................................................... 5751-1
29 *Tee, Orifice ......................................................................... 5750-1
30 Plate, Housing Back ................................................................... 5766
Pilot Assembly, Complete
31 +Flame Rod (CR2-G-15) ...................................................... 5706-3
31A +Scanner (CR2-G-20A) ...................................................... 5706-4
32 Cable, Ignition (Consisting Of)
Cable #14-19 GTO 15,000 .................................................. 5710
*#2Rajah Ring Terminal ....................................................... 5713
*CT-11 Rajah Cage Terminal ............................................... 5714
33 Cable, Flame Rod (Consisting Of)
Cable, #14-19 GTO 15,000 ................................................. 5710
*Stud, Ring (2) ..................................................................... 5711
34 Clamp, Flanged Rod & Ignition Electrode .................................. 5767-1
34A Clamp, Ignition Electrode ........................................................... 5767
BTP 200-1500
BTP 300-1500
BTP 400-1500
BTP 600-1500
BTP 400-1750
BTP 600-1750
BTP 400-2000
BTP 600-2000
BTP 400-2250
BTP 600-2250
BTP 400-2500
BTP 600-2500
POWER BURNER MODELS CR2-G-15 AND CR2-G-20A
Burner
Models Number
CR2-G-15
CR2-G-15
CR2-G-15
CR2-G-20A
CR2-G-20A
Part
Number
Item
35 Flame Rod With Porcelain (CR2-G-15) ...................................... 5744
36 Ignition Electrode With Porcelain ................................................ 5746
37 Insulator, Porcelain (Flame Rod) ................................................ 5745
38 Orifice, Pilot
Natural (CR2-G-15) .............................................................. 5709
Natural (CR2-G-20A) ............................................................ 5709-2
Propane ................................................................................. 5709-1
39 Plate, Pilot Mounting .................................................................... 5743-1
40 Plate, Back Sight Glass .............................................................. 5729
41 Plate, Pump Opening (Damper Cover) ....................................... 5791
43 Regulator, Main Gas (Natural Only)
CR2-G-15 .............................................................................. 5741-2
CR2-G-20A ........................................................................... 5741-3
44 Regulator, Pilot
CR2-G-15 .............................................................................. 5742
CR2-G-20A ........................................................................... 5742-1
45 Ring, End (For Burners Before 5-11-81 Only) ......................... 5718-1
46 Ring, Motor Plate ......................................................................... 5769
47 Rod, Push .................................................................................... 5770
48 Scanner(CR2-G-20A) ................................................................ 5712-1
49 Shalt, Extension (For Mod Motor) .............................................. 5771
51 *Sub-Base ................................................................................... 95657
52 Switch, Air .................................................................................. 5752
53 Swivel (BaIl Joint) ....................................................................... 5773
54 Switch, High Gas Pressure (CR2-G-20A) ................................ 5774
55 Switch, Low Gas Pressure (CR2-G-20A) ................................ 5774-1
56 *Terminal Strip
Adapter, End Mounting ......................................................... 5731-1
Strip, Marking ........................................................................ 5731-2
TerminaI Block ....................................................................... 5731
57 *Timer, Control ............................................................................ 5704
58 Transformer, lgnition .................................................................. 5734
59 Tube, Blast
CR2-G-15 .............................................................................. 5715-1
CR2-G-20 .............................................................................. 5715-3
60 Valve, Adjustable Bleed (CR2-G-15) ........................................ 5738
61 *Valve, Auxiliary Solenoid Gas:
CR2-G-15 .............................................................................. 5737-2
CR2-G-20A ........................................................................... 5737-3
62 Valve Body, Gas:
CR2-G-15 .............................................................................. 5777-3
CR2-G-20A ........................................................................... 5775-1
63 Valve, Butterfly:
CR2-G-15 .............................................................................. 5776
CR2-G-20A ........................................................................... 5776-1
64 Valve, Diaphragm Gas (C2-G-15) ............................................. 5739-2
65 Valve Operator, Gas:
CR2-G-15 .............................................................................. 5777-2
CR2-G-20A ........................................................................... 5777-1
66 Valve, Pilot:
CR2-G-15 .............................................................................. 5740
CR2-G-20A ........................................................................... 5740-1
67 Wheel, Blower:
CR2-G-15 .............................................................................. 5733-2
CR2-G-20A ........................................................................... 5733-3
68 Standard hardware items may be purchased locally
*Not illustrated
+When ordering, tell if needed for Natural or Propane gas.
ORIFICE CHART
Natural
Gas Orifice
Part No (Decimal) Part No
5708 .843 5708-5
5708-1 .921 5708-6
5708-2 1.000 5708-7
5708-3 1.437 5708-9
5708-4 1.812 5708-10
7
Description
Propane
Gas Orifice
(Decimal)
.437
.500
.531
.562
.652
Part
Number