Component information, Orifice table – A.O. Smith 960 through 967 User Manual
Page 35
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BTH S E R V I C E H A N D B O O K
C O M P O N E N T I N F O R M A T I O N
COMPONENT INFORMATION
FLAME SENSING ROD
AOS PART NUMBER
FLAME SENSING CURRENT
COMMENTS
192478
0.7 Micro Amp (p)
BTH 120-250
HOT SURFACE IGNITOR (HSI)
AOS PART NUMBER
VOLTAGE
AMP
OHMS COLD
COMMENTS
192638
120 VAC
1.0
50 - 300
BTH 120-250
ORIFICE TABLE
ORIFICE TABLE
BTH MODEL
MAIN BURNER
ORIFICE NO.
MAIN ORIFICE SIZE
INCHES
AIR ORIFICES
PT. NO.
AIR ORIFICE
SIZE — INCHES
120
192477-3
0.204
192450-3
0.788
150
192477-1
0.235
192450-1
0.875
199
192477-0
0.304
192450-0
1.031
250
192477-2
0.360
192450-2
1.196
120 Prop
192477-6
0.125”
192450-5**
0.872
150 Prop
192477-5
0.141”
192450-5**
0.872
199 Prop
192477-4
0.166”
192450-4**
1.150
*-4 and -5 Red plated for Propane.
** -4 and -5 stamped with “P” for Propane
N O T E :
Hex head of main burner orifice is upstream end — gas flows out of tapered end.
Technical Training Department
TC-044 Revision 6
34
A. O. Smith Water Products Co.
Ashiand City, Tennessee © 2004