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SBN71-120 thru SBN85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
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Ashland City, Tennessee 7002 ©
DRAFT PROVING PRESSURE SWITCH - SETTINGS
Draft Proving Pressure Switch Table
SBN
Models
SBD
Models
Pressure Setting
To Close Switch
(Inches W.C.)
"01. ± 06.1 )-(663
"01. ± "00.2 )-(572
"01. ± "57,1 )-(013
"01. ± "04.2 )-(002/021
"01. ± "06.2 )-(081/451
30-150/199
NOTE: Pressure Switch Contacts are Normally Open “N.O.” and close on a fall in pressure.
(-) 2.50" ± .10"