A.O. Smith HW/HWB 300 THRU 670 manual Parts Description, HW 399/420, HW670, Items not illustrated

	Item	Parts Description					HW 300	HW 399/420	HW 520	HW670
27		Grommet					96053	96053	96053	96053
28		Hood, Draft:
	..........	Series 100				190479-700 ..		98428-707/98428-704 ....	98428-704	98428-8
	..........	Series 101				190479-700 ..		98428-707/98428-704 ....	98428-704	98428-700
30		Insulation, Blanket					212042-2	212042-3	212042-4	212042-5
31		Insulation, Pyrofelt					212043	212044	212044	212044
32		Insulator					32779-1	32779-1	32779-1	32779-1
33		Jacket					211176	211177	211178	211178
34		Leg					96383-711	96383-701	96383-701	96383-701
35		Nut, Tie Rod	.................................................				85138	85138	85138	85138
36		Nut, Wing					- - - -	1995-1	1995-1	1995-1
37		Orifice, Pilot Burner:
	..........	Natural Gas					6210	6210	6210	6210
	..........	Propane Gas					210913	210913	210913	210913
38		Plug, Pipe 1/8" Pressure Tap					3348	3348	3348	3348
39		Retainer, Door					190429	190429	190429	190429
40		Ring, Support					95359	85405	85405	85405
41		Rod, Tie (3 Required)		................................... - - - -				94453-11	94453-3	94453-3
					HW
	..........	Rod, Tie (2 Required)					94453-6	- - - -	- - - -	- - - -
	..........	Rod, Tie (1 Required)					94453-2	- - - -	- - - -	- - - -
42		Screen, Peep Hole					1051	1051	1051	1051
43		Screw, Thumb					97288	97288	97288	97288
44		Shield, Base Radiation			..............................		96015-1	96015	96015	96015
45		Shield, Door					191119	191119	191119	191119
46		Shield, Floor	..................................................				- - - -	96025	96025	96025
47		Shield, Leg					97265	97265	97265	97265
48		Shield, Pilot					170247	170247	170247	170247
49		Skirt Assembly					97260	97261	97262	97262
50		Stud, Floor Shield					- - - -	96384	96384	96384
51		Switch, Safety Flow
	..........	(Required but not supplied with unit)					.. 211480	211480	211480	211480
52		Tape, Asbestos Free (Used with Item 40)					... 95072	95072-1	95072-1	95072-1
53		Terminal, Segment (4 Required)					98205	98205	98205	98205
54		Thermal Balancer			HW98190 .................... 98190				98190	98190
55		Red			HW				69170-10	69170-10
		Transformer	..............................................				69170-10	69170-10
56		Tube, Asbestos Free					68831	68831	68831	68831
57		Tube, By-Pass					96162-1	94451-3	97463	97463
58		Tubing, 1/4" x 60" Wire Assorted Fittings
	..........	(User to cut to required length)					1417-60	1417-60	1417-60	1417-60
59		Valve, Gas Control:
	..........	Natural Gas (Series 100)					78450	78450-4/78450	78450	78450
	..........	Propane Gas (Series 101)					78450-1	78450-5/78450-1	78450-1	78450-1
60		Valve, Relief 50 PSI					210451	210451-1	210451-1	210451-1
61		Wire, 200°C Tan with Terminals					6226	6226	6226	6226
62		*Wire, (See illustration for terminals —
	..........	Order as required):
	..........	16 AWG Stranded, 1050C, AWM & TEW
	..........	Black					86578	86578	86578	86578
	..........		................................................. 86579					86579	86579	86579
	..........	White					86580	86580	86580	86580
	..........	18 AWG Stranded, 200°C
	..........	Tan	.................................................				78223	78223	78223	78223
63		Wire, Ground, 250°C					170889-69	170889-69	170889-69	170889-69
64		Standard hardware items to be purchased locally.
65		Glass Yarn (4 Req’d.)					68831-2	68831-3	68831-3	68831-3
66		Glass Yarn (4 Req’d.)					68831-5	68831-4	68831-6	68831-6
67		Valve - Manual Shut Off			................................		3423-5	3423-4	3423-3	3423-3
68		Baffle (5) location inside tubes					211931	- - - -	- - - -	- - - -
69		Baffle-V (2) location outside tubes					192263	- - - -	- - - -	- - - -
70		Baffle-V (7)					- - - -	192263-2	192263-2	- - - -
71		Pilot Valve					200683	200683	200683	200683
72		Standard hardware - purchase locally					- - - -	- - - -	- - - -	- - - -
73		Shield - Radiation					211822	- - - -	- - - -	- - - -
74		Shield Radiation Base			................................ 211824			- - - -	- - - -	- - - -
					HW
75		Base Leg					211827	- - - -	- - - -	- - - -

*Items not illustrated.

When ordering wire, indicate length required in inches. (Example: 86578-100 equals 100" length).

Part numbers underlined are recommended stock items for emergency replacement. (Consider gas used in your area only).