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SUF SERVICE HANDBOOK
COMPONENT INFORMATION
Technical Training Department State Water Heaters
STC-077
32 Ashland City, Tennessee © 2004
COMPONENT INFORMATION
ORIFICE TABLE
* -4 and -5 stamped with “P” for Propane
NOTE: Hex head of main burner orifice is upstream end — gas flows out of tapered end.
FLAME SENSING ROD
PART NUMBER FLAME SENSING CURRENT COMMENTS
192478 0.7 Micro Amp (µ) SUF 150, 199, & 240
HOT SURFACE IGNITOR (HSI)
PART NUMBER VOLTAGE AMP OHMS COLD COMMENTS
192638 120 VAC 1.0 50 – 300 SUF 150, 199, & 240
ORIFICE TABLE
SUF MODEL
MAIN BURNER
ORIFICE NO.
MAIN ORIFICE SIZE
INCHES
AIR ORIFICES
PT. NO.
AIR ORIFICE
SIZE — INCHES
150 192477-1 0.235 192450-1 0.875
199 192477-0 0.304 192450-0 1.031
240 192477-2 0.360 192450-2 1.196
150 Prop 192477-5 0.141” 192450-5* 0.872
199 Prop 192477-4 0.166” 192450-4* 1.150