20
21
3
1B
1A
2
22
23 24
ITEM
DESCRIPTION
1a
Burner Assy (45,000 Btu)
1b
Burner Assy (50,000 Btu)
2
Burner Mounting Bracket
3
Igniter
4
Pressure Relief Valve (PRV)
5
Modulating Valve Assembly
6
Gas Valve
7
Gas Line – Burner
8
Relay
9
Water Inlet Tube
10
Gas Inlet Tube
11
Ignition Control
12
Flue Outlet Screen
13
Flue Tube
14
Pressure Switch
15
Blower Assembly
16
Fan Base
17
Flue Hood Assembly
18
Case Assembly
19
Heat Exchanger
20
ECO
21
Low Temperature Switch
19
7
25
4
12
5
13
6
PART #
90263
90264
90265
90266
90267
90268
90312
90270
90271
90272
90273
90187
90275
90276
90277
90278
90279
90280
90281
90282
90283
90311
17
10
14
15
8
9
11
16
ITEM
22
Orifice #72 (45,000 Btu
23
Orifice #71 (50,000 Btu
24
Orifice 0.27 (55K for PT#3392
25
Pressure Elbow Assy
NS
Standard Door Kit (specify color)
NS
Large Door Kit (specify color)
NS
Winter Kit
5
18
DESCRIPTION
PART #
90285
90286
Inquire
90287
Inquire
Inquire
90290