Controls - Pressure Switches - Bth 300,400,500 - A.O. Smith Cyclone Xi Service Handbook

CONTROLS – PRESSURE SWITCHES – BTH 300,400,500
BLOCKED INLET
PRESSURE SWITCH
M ODEL PRESSURE
300 -.085"WC
400 -1.25"WC
500 -1.35"WC
Norm ally Close d/
Ope n on a fall in
Pre s s ure
Tole rance +/-.05"WC
Note: Check the website
Switches" under "Literature/Technical Bulletins"
A.O. Smith – Technical Training Department
CYCLONE Xi COMMERCIAL GAS WATER HEATER
BTH 120 thru 500 SERVICE HANDBOOK
LOW GAS PRESSURE
SWITCH
MODEL PRESSURE
Natural +4.6"WC
LP +9.0"WC
Norm ally Ope n/
Clos e on a Ris e in
Pre ss ure
Tole rance +/-.05"WC
Top View of Pressure Switches
www.hotwater.com
Servicing should only be performed by a Qualified Service Agent
BLOWER PROVER
PRESSURE SWITCH
M ODEL
300
400
500
Norm ally Ope n / Clos e on
a ris e in Pre ss ure
Tole rance +/-.05"WC
BTH 300,400,500
for Technical Bulletin A023-06 "Air Pressure
34
BLOCKED EXHAUST
PRESSURE SWITCH
PRESSURE
M ODEL
+1.0"WC
300
+2.5"WC
400
+4.5 'WC
500
Norm ally Close d /
Ope n on a Ris e in
Pre s sure
Tole rance +/-.05"WC
Ashland City, Tennessee © 2009
PRESSURE
+1.15"WC
+1.39"WC
+1.77"WC
316586-000