Pressure switches (continued) – A.O. Smith 960 through 967 User Manual
Page 37
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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
PRESSURE SWITCHES (CONTINUED)
PRESSURE SWITCHES
PART NUMBER / ACTIVATION PRESSURE^
Model
Series
Blocked Inlet
Normally Closed
Opens on a fall
Blower Prover
Normally Open
Closes on a rise
Low Gas Pressure
Normaily Open
Cioses on a rise
Biocked Outiet
Normaliy Ciosed
Opens on a rise
BTH 120
966
193293-000/-1.00”
193295-000/+0.45”
191149-001 /+5.00”
193294-000/+2.00”
967
193356-000/-2.00”
193295-000/+0.45”
191149-004/+9.00”
193357-000/+4.00”
970
193293-000/-1.00”
194706-000/+1.00”
191149-005/+5.20”
193294-000/+2.00”
971
193356-000/-2.00”
194706-000/+1.00”
191149-004/+9.00”
193357-000/+4.00”
973
193356-000/-2.00”
194706-000/+1.00”
191149-004/+9.00”
193357-000/+4.00”
BTH 150
960
N/A
192811-000/+4.20”
N/A
192810-000/+4.35”
962
192882-000/-0.75”
193221-000/+0.45”
N/A
192878-000/+2.53”
966
193363-000/-0.76”
193295-000/+0.45”
N/A
193362-000/+2.60”
967
193355-000/-1.80”
193295-000/+0.45”
N/A
193357-000/+4.00”
970
193363-000/-0.76”
194706-000/+1.00”
N/A
193362-000/+2.60”
971
193355-000/-1.80”
194706-000/+1.00”
N/A
193357-000/+4.00”
973
193355-000/-1.80”
194706-000/+1.00”
N/A
193357-000/+4.00”
BTH 199
960
N/A
192811-000/+4.20”
N/A
192810-000/+4.35”
962
192882-000/-0.75”
193221-000/+0.45”
N/A
192878-000/+2.53”
966
193363-000/-0.76”
193295-000/+0.45”
N/A
193364-000/+2.87”
967
193356-000/-2.00”
193295-000/+0.45”
N/A
193357-000/+4.00”
970
193363-000/-0.76”
194706-000/+1.00”
N/A
193364-000/+2.87”
971
193356-000/-2.00”
194706-000/+1.00”
N/A
193357-000/+4.00”
973
193356-000/-2.00”
194706-000/+1.00”
N/A
193357-000/+4.00”
BTH 250
962
192947-000/-0.77”
193221-000/+0.45”
193222-000/+4.75”
192946-000/+4.16”
966
193361-000/-0.77”
193295-000/+0.45”
191149-001 /+5.00”
193357-000/+4.00”
970
193361-000/-0.77”
194706-000/+1.00”
191149-005/+5.20”
193357-000/+4.00”
t- 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.
Technical Training Department
TC-044 Revision 6
36
A. O. Smith Water Products Co.
Ashiand City, Tennessee © 2004