Bock Water heaters OT300 Installation And Operation Instruction Manual page 50

SECTION VIII: PARTS LIST
Table 18: optiTHERM Burner Assembly Parts
#
1 Gas Pressure Switch
2 Gas Control Flange (w/ gasket)
Gas Control (NAT GAS_0-2,000 FT ALT)
3
Gas Control (LP GAS_0-7,800 FT ALT; NAT
3
GAS_2,000-7,800 FT ALT)
4 Pipe Nipple (NAT GAS models)
4 Pipe Nipple w/ 0.391" Orifice (LP GAS models)
** - includes mounting flange, insulation disk, retaining plate and bolts
Page 50
Figure 36: optiTHERM Burner Assembly Parts
Description # Description
5 Blower
6 Gasket (blower to transition tube)
7 Transition Tube
8 Gasket (transition tube to burner)
9 Burner
10 Gasket (burner to mounting flange)
**
11 Flange Assembly