A.O. Smith BTP-300-1500 manual POWER BURNER MODELS CR2-G-15 AND CR2-G-20A, Orifice Chart, Part

POWER BURNER MODELS CR2-G-15 AND CR2-G-20A

		Part
Item	Description	Number
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

		Part
Item	Description	Number
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

68Standard hardware items may be purchased locally *Not illustrated

+When ordering, tell if needed for Natural or Propane gas.

ORIFICE CHART

			Natural		Propane
	Burner		Gas Orifice		Gas Orifice
Models	Number	Part No	(Decimal)	Part No	(Decimal)
BTP 200-1500
BTP 300-1500	CR2-G-15	5708	.843	5708-5	.437
BTP 400-1500
BTP 600-1500
BTP 400-1750	CR2-G-15	5708-1	.921	5708-6	.500
BTP 600-1750
BTP 400-2000	CR2-G-15	5708-2	1.000	5708-7	.531
BTP 600-2000
BTP 400-2250	CR2-G-20A	5708-3	1.437	5708-9	.562
BTP 600-2250
BTP 400-2500	CR2-G-20A	5708-4	1.812	5708-10	.652
BTP 600-2500

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