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OUT DESCRIPTION 268A 408A
B BURNER TRAY
1-B Burner Tray w/Burners (sea level)* 013796F 013797F
Burner Tray w/o Burners (sea level)* 013798F 013799F
Burner Tray w/Gas Valve Nat 013800F 013801F
Burner Tray w/Gas Valve Pro 013802F 013803F
2-B Burner Spacer/Hold Down Kit 013804F 013805F
3-B Burner 301210/18 301210/27
4-B Burner Orifice Nat. #50 (Sea Level)* 350079F/18 350079F/27
Burner Orifice Pro. #57 (Sea Level)* 350083F/18 350083F/27
5-B Burner Tray w/o Manifold w/o burners 013806F 013807F
C CONTROLS
1-C AGS 135° (Auto Gas Shut-Off) - Red Epoxy 600892B 600892B
2-C High Limit 140° - Black Epoxy 600893B 600893B
3-C P. C. Board/Control 013464F 013464F
4-C LCD Display 013640F 013640F
5-C Fuse 5 AMP 013733F 013733F
6-C Temperature Sensor IID Units 009577F 009577F
7-C Flow Switch 007142F 007142F
8-C Flow Switch Paddle 010026F 010026F
G GAS VALVE
1-G Combination Valve - Nat. 003900F 003900F
Combination Valve - Pro. 004306F 004306F
H HEAT EXCHANGER
1-H Heat Exchange Assy Cupro-Nickel ASME BR 013808F 013809F
2-H Inlet/Outlet Header ASME BR Complete 013810F 013810F
Inlet/Outlet Header ASME BR 013811F 013811F
3-H Inlet or Outlet Flange BR (1 only) 013812F 013812F
4-H Flange Gasket (3) 016732F 016732F
23-H Flange Bolts 016159F 016159F
5-H Return Header ASME BR 002451F 002451F
6-H Tube Bundle Cupro-Nickel ASME ** 013813F 013814F
7-H Baffle 013815F 013816F
8-H Stud Bolt Kit 007870F 007870F
9-H Header Gasket (9) 800014B 800014B
10-H Unitherm Governor 062234B 062234B
11-H U.G. Retainer Spring 013792F 013792F
12-H U.G. Plug 013738F 013738F
13-H Bypass Valve Assembly 016194F 016194F
14-H Bypass Spring
Units with Brass Bypass Valve (Units manufactured to 3/5/17) 013794F 013794F
Units with Plastic Bypass Valve (Units manufactured from 3/5/17) 016196F 016196F
15-H Drain Valve 013793F 013793F
16-H Sensor Well 003765F 003765F
17-H Well Retaining Clip 300203 300203
18-H Rear Drain Plug & Cover 005264F 005264F
19-H
2" CPVC Adapter NPT (Inlet Plumbing) 005393F 005393F
20-H 2" CPVC Connector (Outlet Plumbing)
NPT Connection 013795F 013795F
Flange Connection 015883F 015883F
24-H Flange Bolts & Washers 016162F 016162F
21-H 2" CPVC Connector & Nut 006723F 006723F
22-H O Ring 006724F 006724F
25-H Pipe Plug Brass 1/4" 016163F 016163F
J CONTROL BOX
1-J Transformer 120/240/24V 006736F 006736F
2-J Rocker Switch 009493F 009493F
*FOR INSTALLATION AT OVER 2,000 FEET ABOVE SEA LEVEL, DERATE 4% PER I,000 FEET ABOVE SEA LEVEL.
**WARNING: The Hydraulic conditions or water chemistry that caused the tube bundle to fail have very likely also
damaged the bypass valve and Unitherm Governor. We recommend you replace the Unitherm Governor and
inspect the bypass assembly. Failure to do so could cause premature failure of this replacement part.
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