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SUF SERVICE HANDBOOK
COMPONENT INFORMATION
Technical Training Department State Water Heaters
STC-077
34 Ashland City, Tennessee © 2004
PRESSURE SWITCHES (CONTINUED)
PRESSURE SWITCHES
PART NUMBER / ACTIVATION PRESSURE
†
†. Pressure values are given in inches of water column pressure (“W.C.).
Negative pressure values in this table are preceded by a “-” minus sign and indicate pressure below
atmospheric; in a vacuum. Positive pressures are preceded by a “+” plus sign and indicate pressure above
atmospheric.
Model Blocked Inlet
Normally Closed
Opens on a fall
Blower Prover
Normally Open
Closes on a rise
Low Gas Pressure
Normally Open
Closes on a rise
Blocked Outlet
Normally Closed
Opens on a rise
SUF 150 193363-000 / -0.76” 194706-000 / +1.00” N/A 193362-000 / +2.60”
193355-000 / -1.80” 194706-000 / +1.00” N/A 193357-000 / +4.00”
193355-000 / -1.80” 194706-000 / +1.00” N/A 193357-000 / +4.00”
SUF 199 193363-000 / -0.76” 194706-000 / +1.00” N/A 193364-000 / +2.87”
193356-000 / -2.00” 194706-000 / +1.00” N/A 193357-000 / +4.00”
193356-000 / -2.00” 194706-000 / +1.00” N/A 193357-000 / +4.00”
SUF 240 193361-000 / -0.77” 194706-000 / +1.00” 191149-005 / +5.20” 193357-000 / +4.00”